Mitigation of chemical degradation in perfluorosulfonic acid proton exchange membrane using regenerable hindered amine functionalized carbon quantum dots
The chemical stability of perfluorosulfonic acid (PFSA) has a significant impact on the lifetime of a proton exchange membrane (PEM). Herein, we describe the design and fabrication of a novel PEM containing hindered amine functionalized carbon quantum dots (HA-CQDs) to improve the PEM's chemica...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Huang, Henghui [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2021transfer abstract |
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| Schlagwörter: |
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| Übergeordnetes Werk: |
Enthalten in: Steering charge kinetics in W - Yue, Xin-Zheng ELSEVIER, 2019, the official journal of the North American Membrane Society, New York, NY [u.a.] |
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| Übergeordnetes Werk: |
volume:636 ; year:2021 ; day:15 ; month:10 ; pages:0 |
| Links: |
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| DOI / URN: |
10.1016/j.memsci.2021.119614 |
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| 520 | |a The chemical stability of perfluorosulfonic acid (PFSA) has a significant impact on the lifetime of a proton exchange membrane (PEM). Herein, we describe the design and fabrication of a novel PEM containing hindered amine functionalized carbon quantum dots (HA-CQDs) to improve the PEM's chemical stability. The novel CQDs are prepared by a hydrothermal reaction using citric acid as the carbon source, while groups of the free radical scavenger 4-amino-2, 2,6,6-tetramethylpiperidine are used to modify the oxygen-containing groups on the CQDs' surface. Benefiting from the introduction of the radical-scavenging groups, the HA-CQDs effectively eliminate active free radicals, thereby improving the PEM's chemical stability. Mass loss, FTIR, SEM, and SAXS are used to evaluate the PEM's chemical stability, surface morphology, and proton conduction by side-chain functional groups via free radicals. The electrochemical performance of the oxidized PEM is evaluated from proton conductivity and single-cell performance, and the free radical scavenging capability is characterized using the 1,1-diphenyl-2-picrylhydrazyl radical (DPPH) radical method. Our work reveals that introducing hindered amines can eliminate the free radicals generated by electrochemical reactions and effectively mitigate the chemical degradation of a PEM. This paper provides a promising way to improve the chemical stability of PFSA and enhance the lifetime of PEMs. | ||
| 520 | |a The chemical stability of perfluorosulfonic acid (PFSA) has a significant impact on the lifetime of a proton exchange membrane (PEM). Herein, we describe the design and fabrication of a novel PEM containing hindered amine functionalized carbon quantum dots (HA-CQDs) to improve the PEM's chemical stability. The novel CQDs are prepared by a hydrothermal reaction using citric acid as the carbon source, while groups of the free radical scavenger 4-amino-2, 2,6,6-tetramethylpiperidine are used to modify the oxygen-containing groups on the CQDs' surface. Benefiting from the introduction of the radical-scavenging groups, the HA-CQDs effectively eliminate active free radicals, thereby improving the PEM's chemical stability. Mass loss, FTIR, SEM, and SAXS are used to evaluate the PEM's chemical stability, surface morphology, and proton conduction by side-chain functional groups via free radicals. The electrochemical performance of the oxidized PEM is evaluated from proton conductivity and single-cell performance, and the free radical scavenging capability is characterized using the 1,1-diphenyl-2-picrylhydrazyl radical (DPPH) radical method. Our work reveals that introducing hindered amines can eliminate the free radicals generated by electrochemical reactions and effectively mitigate the chemical degradation of a PEM. This paper provides a promising way to improve the chemical stability of PFSA and enhance the lifetime of PEMs. | ||
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| 700 | 1 | |a Luo, Feiyan |4 oth | |
| 700 | 1 | |a Fan, Jiantao |4 oth | |
| 700 | 1 | |a Li, Hui |4 oth | |
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10.1016/j.memsci.2021.119614 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001496.pica (DE-627)ELV054742129 (ELSEVIER)S0376-7388(21)00560-3 DE-627 ger DE-627 rakwb eng 540 VZ 35.17 bkl 58.50 bkl 43.12 bkl Huang, Henghui verfasserin aut Mitigation of chemical degradation in perfluorosulfonic acid proton exchange membrane using regenerable hindered amine functionalized carbon quantum dots 2021transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The chemical stability of perfluorosulfonic acid (PFSA) has a significant impact on the lifetime of a proton exchange membrane (PEM). Herein, we describe the design and fabrication of a novel PEM containing hindered amine functionalized carbon quantum dots (HA-CQDs) to improve the PEM's chemical stability. The novel CQDs are prepared by a hydrothermal reaction using citric acid as the carbon source, while groups of the free radical scavenger 4-amino-2, 2,6,6-tetramethylpiperidine are used to modify the oxygen-containing groups on the CQDs' surface. Benefiting from the introduction of the radical-scavenging groups, the HA-CQDs effectively eliminate active free radicals, thereby improving the PEM's chemical stability. Mass loss, FTIR, SEM, and SAXS are used to evaluate the PEM's chemical stability, surface morphology, and proton conduction by side-chain functional groups via free radicals. The electrochemical performance of the oxidized PEM is evaluated from proton conductivity and single-cell performance, and the free radical scavenging capability is characterized using the 1,1-diphenyl-2-picrylhydrazyl radical (DPPH) radical method. Our work reveals that introducing hindered amines can eliminate the free radicals generated by electrochemical reactions and effectively mitigate the chemical degradation of a PEM. This paper provides a promising way to improve the chemical stability of PFSA and enhance the lifetime of PEMs. The chemical stability of perfluorosulfonic acid (PFSA) has a significant impact on the lifetime of a proton exchange membrane (PEM). Herein, we describe the design and fabrication of a novel PEM containing hindered amine functionalized carbon quantum dots (HA-CQDs) to improve the PEM's chemical stability. The novel CQDs are prepared by a hydrothermal reaction using citric acid as the carbon source, while groups of the free radical scavenger 4-amino-2, 2,6,6-tetramethylpiperidine are used to modify the oxygen-containing groups on the CQDs' surface. Benefiting from the introduction of the radical-scavenging groups, the HA-CQDs effectively eliminate active free radicals, thereby improving the PEM's chemical stability. Mass loss, FTIR, SEM, and SAXS are used to evaluate the PEM's chemical stability, surface morphology, and proton conduction by side-chain functional groups via free radicals. The electrochemical performance of the oxidized PEM is evaluated from proton conductivity and single-cell performance, and the free radical scavenging capability is characterized using the 1,1-diphenyl-2-picrylhydrazyl radical (DPPH) radical method. Our work reveals that introducing hindered amines can eliminate the free radicals generated by electrochemical reactions and effectively mitigate the chemical degradation of a PEM. This paper provides a promising way to improve the chemical stability of PFSA and enhance the lifetime of PEMs. Hindered amine Elsevier Chemical stability Elsevier Radical scavenger groups Elsevier Proton exchange membrane Elsevier Single-cell performance Elsevier Xu, Shaoyi oth Zhou, Jiexin oth Luo, Feiyan oth Fan, Jiantao oth Li, Hui oth Enthalten in Elsevier Yue, Xin-Zheng ELSEVIER Steering charge kinetics in W 2019 the official journal of the North American Membrane Society New York, NY [u.a.] (DE-627)ELV002478420 volume:636 year:2021 day:15 month:10 pages:0 https://doi.org/10.1016/j.memsci.2021.119614 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA 35.17 Katalyse VZ 58.50 Umwelttechnik: Allgemeines VZ 43.12 Umweltchemie VZ AR 636 2021 15 1015 0 |
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10.1016/j.memsci.2021.119614 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001496.pica (DE-627)ELV054742129 (ELSEVIER)S0376-7388(21)00560-3 DE-627 ger DE-627 rakwb eng 540 VZ 35.17 bkl 58.50 bkl 43.12 bkl Huang, Henghui verfasserin aut Mitigation of chemical degradation in perfluorosulfonic acid proton exchange membrane using regenerable hindered amine functionalized carbon quantum dots 2021transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The chemical stability of perfluorosulfonic acid (PFSA) has a significant impact on the lifetime of a proton exchange membrane (PEM). Herein, we describe the design and fabrication of a novel PEM containing hindered amine functionalized carbon quantum dots (HA-CQDs) to improve the PEM's chemical stability. The novel CQDs are prepared by a hydrothermal reaction using citric acid as the carbon source, while groups of the free radical scavenger 4-amino-2, 2,6,6-tetramethylpiperidine are used to modify the oxygen-containing groups on the CQDs' surface. Benefiting from the introduction of the radical-scavenging groups, the HA-CQDs effectively eliminate active free radicals, thereby improving the PEM's chemical stability. Mass loss, FTIR, SEM, and SAXS are used to evaluate the PEM's chemical stability, surface morphology, and proton conduction by side-chain functional groups via free radicals. The electrochemical performance of the oxidized PEM is evaluated from proton conductivity and single-cell performance, and the free radical scavenging capability is characterized using the 1,1-diphenyl-2-picrylhydrazyl radical (DPPH) radical method. Our work reveals that introducing hindered amines can eliminate the free radicals generated by electrochemical reactions and effectively mitigate the chemical degradation of a PEM. This paper provides a promising way to improve the chemical stability of PFSA and enhance the lifetime of PEMs. The chemical stability of perfluorosulfonic acid (PFSA) has a significant impact on the lifetime of a proton exchange membrane (PEM). Herein, we describe the design and fabrication of a novel PEM containing hindered amine functionalized carbon quantum dots (HA-CQDs) to improve the PEM's chemical stability. The novel CQDs are prepared by a hydrothermal reaction using citric acid as the carbon source, while groups of the free radical scavenger 4-amino-2, 2,6,6-tetramethylpiperidine are used to modify the oxygen-containing groups on the CQDs' surface. Benefiting from the introduction of the radical-scavenging groups, the HA-CQDs effectively eliminate active free radicals, thereby improving the PEM's chemical stability. Mass loss, FTIR, SEM, and SAXS are used to evaluate the PEM's chemical stability, surface morphology, and proton conduction by side-chain functional groups via free radicals. The electrochemical performance of the oxidized PEM is evaluated from proton conductivity and single-cell performance, and the free radical scavenging capability is characterized using the 1,1-diphenyl-2-picrylhydrazyl radical (DPPH) radical method. Our work reveals that introducing hindered amines can eliminate the free radicals generated by electrochemical reactions and effectively mitigate the chemical degradation of a PEM. This paper provides a promising way to improve the chemical stability of PFSA and enhance the lifetime of PEMs. Hindered amine Elsevier Chemical stability Elsevier Radical scavenger groups Elsevier Proton exchange membrane Elsevier Single-cell performance Elsevier Xu, Shaoyi oth Zhou, Jiexin oth Luo, Feiyan oth Fan, Jiantao oth Li, Hui oth Enthalten in Elsevier Yue, Xin-Zheng ELSEVIER Steering charge kinetics in W 2019 the official journal of the North American Membrane Society New York, NY [u.a.] (DE-627)ELV002478420 volume:636 year:2021 day:15 month:10 pages:0 https://doi.org/10.1016/j.memsci.2021.119614 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA 35.17 Katalyse VZ 58.50 Umwelttechnik: Allgemeines VZ 43.12 Umweltchemie VZ AR 636 2021 15 1015 0 |
| allfields_unstemmed |
10.1016/j.memsci.2021.119614 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001496.pica (DE-627)ELV054742129 (ELSEVIER)S0376-7388(21)00560-3 DE-627 ger DE-627 rakwb eng 540 VZ 35.17 bkl 58.50 bkl 43.12 bkl Huang, Henghui verfasserin aut Mitigation of chemical degradation in perfluorosulfonic acid proton exchange membrane using regenerable hindered amine functionalized carbon quantum dots 2021transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The chemical stability of perfluorosulfonic acid (PFSA) has a significant impact on the lifetime of a proton exchange membrane (PEM). Herein, we describe the design and fabrication of a novel PEM containing hindered amine functionalized carbon quantum dots (HA-CQDs) to improve the PEM's chemical stability. The novel CQDs are prepared by a hydrothermal reaction using citric acid as the carbon source, while groups of the free radical scavenger 4-amino-2, 2,6,6-tetramethylpiperidine are used to modify the oxygen-containing groups on the CQDs' surface. Benefiting from the introduction of the radical-scavenging groups, the HA-CQDs effectively eliminate active free radicals, thereby improving the PEM's chemical stability. Mass loss, FTIR, SEM, and SAXS are used to evaluate the PEM's chemical stability, surface morphology, and proton conduction by side-chain functional groups via free radicals. The electrochemical performance of the oxidized PEM is evaluated from proton conductivity and single-cell performance, and the free radical scavenging capability is characterized using the 1,1-diphenyl-2-picrylhydrazyl radical (DPPH) radical method. Our work reveals that introducing hindered amines can eliminate the free radicals generated by electrochemical reactions and effectively mitigate the chemical degradation of a PEM. This paper provides a promising way to improve the chemical stability of PFSA and enhance the lifetime of PEMs. The chemical stability of perfluorosulfonic acid (PFSA) has a significant impact on the lifetime of a proton exchange membrane (PEM). Herein, we describe the design and fabrication of a novel PEM containing hindered amine functionalized carbon quantum dots (HA-CQDs) to improve the PEM's chemical stability. The novel CQDs are prepared by a hydrothermal reaction using citric acid as the carbon source, while groups of the free radical scavenger 4-amino-2, 2,6,6-tetramethylpiperidine are used to modify the oxygen-containing groups on the CQDs' surface. Benefiting from the introduction of the radical-scavenging groups, the HA-CQDs effectively eliminate active free radicals, thereby improving the PEM's chemical stability. Mass loss, FTIR, SEM, and SAXS are used to evaluate the PEM's chemical stability, surface morphology, and proton conduction by side-chain functional groups via free radicals. The electrochemical performance of the oxidized PEM is evaluated from proton conductivity and single-cell performance, and the free radical scavenging capability is characterized using the 1,1-diphenyl-2-picrylhydrazyl radical (DPPH) radical method. Our work reveals that introducing hindered amines can eliminate the free radicals generated by electrochemical reactions and effectively mitigate the chemical degradation of a PEM. This paper provides a promising way to improve the chemical stability of PFSA and enhance the lifetime of PEMs. Hindered amine Elsevier Chemical stability Elsevier Radical scavenger groups Elsevier Proton exchange membrane Elsevier Single-cell performance Elsevier Xu, Shaoyi oth Zhou, Jiexin oth Luo, Feiyan oth Fan, Jiantao oth Li, Hui oth Enthalten in Elsevier Yue, Xin-Zheng ELSEVIER Steering charge kinetics in W 2019 the official journal of the North American Membrane Society New York, NY [u.a.] (DE-627)ELV002478420 volume:636 year:2021 day:15 month:10 pages:0 https://doi.org/10.1016/j.memsci.2021.119614 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA 35.17 Katalyse VZ 58.50 Umwelttechnik: Allgemeines VZ 43.12 Umweltchemie VZ AR 636 2021 15 1015 0 |
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10.1016/j.memsci.2021.119614 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001496.pica (DE-627)ELV054742129 (ELSEVIER)S0376-7388(21)00560-3 DE-627 ger DE-627 rakwb eng 540 VZ 35.17 bkl 58.50 bkl 43.12 bkl Huang, Henghui verfasserin aut Mitigation of chemical degradation in perfluorosulfonic acid proton exchange membrane using regenerable hindered amine functionalized carbon quantum dots 2021transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The chemical stability of perfluorosulfonic acid (PFSA) has a significant impact on the lifetime of a proton exchange membrane (PEM). Herein, we describe the design and fabrication of a novel PEM containing hindered amine functionalized carbon quantum dots (HA-CQDs) to improve the PEM's chemical stability. The novel CQDs are prepared by a hydrothermal reaction using citric acid as the carbon source, while groups of the free radical scavenger 4-amino-2, 2,6,6-tetramethylpiperidine are used to modify the oxygen-containing groups on the CQDs' surface. Benefiting from the introduction of the radical-scavenging groups, the HA-CQDs effectively eliminate active free radicals, thereby improving the PEM's chemical stability. Mass loss, FTIR, SEM, and SAXS are used to evaluate the PEM's chemical stability, surface morphology, and proton conduction by side-chain functional groups via free radicals. The electrochemical performance of the oxidized PEM is evaluated from proton conductivity and single-cell performance, and the free radical scavenging capability is characterized using the 1,1-diphenyl-2-picrylhydrazyl radical (DPPH) radical method. Our work reveals that introducing hindered amines can eliminate the free radicals generated by electrochemical reactions and effectively mitigate the chemical degradation of a PEM. This paper provides a promising way to improve the chemical stability of PFSA and enhance the lifetime of PEMs. The chemical stability of perfluorosulfonic acid (PFSA) has a significant impact on the lifetime of a proton exchange membrane (PEM). Herein, we describe the design and fabrication of a novel PEM containing hindered amine functionalized carbon quantum dots (HA-CQDs) to improve the PEM's chemical stability. The novel CQDs are prepared by a hydrothermal reaction using citric acid as the carbon source, while groups of the free radical scavenger 4-amino-2, 2,6,6-tetramethylpiperidine are used to modify the oxygen-containing groups on the CQDs' surface. Benefiting from the introduction of the radical-scavenging groups, the HA-CQDs effectively eliminate active free radicals, thereby improving the PEM's chemical stability. Mass loss, FTIR, SEM, and SAXS are used to evaluate the PEM's chemical stability, surface morphology, and proton conduction by side-chain functional groups via free radicals. The electrochemical performance of the oxidized PEM is evaluated from proton conductivity and single-cell performance, and the free radical scavenging capability is characterized using the 1,1-diphenyl-2-picrylhydrazyl radical (DPPH) radical method. Our work reveals that introducing hindered amines can eliminate the free radicals generated by electrochemical reactions and effectively mitigate the chemical degradation of a PEM. This paper provides a promising way to improve the chemical stability of PFSA and enhance the lifetime of PEMs. Hindered amine Elsevier Chemical stability Elsevier Radical scavenger groups Elsevier Proton exchange membrane Elsevier Single-cell performance Elsevier Xu, Shaoyi oth Zhou, Jiexin oth Luo, Feiyan oth Fan, Jiantao oth Li, Hui oth Enthalten in Elsevier Yue, Xin-Zheng ELSEVIER Steering charge kinetics in W 2019 the official journal of the North American Membrane Society New York, NY [u.a.] (DE-627)ELV002478420 volume:636 year:2021 day:15 month:10 pages:0 https://doi.org/10.1016/j.memsci.2021.119614 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA 35.17 Katalyse VZ 58.50 Umwelttechnik: Allgemeines VZ 43.12 Umweltchemie VZ AR 636 2021 15 1015 0 |
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10.1016/j.memsci.2021.119614 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001496.pica (DE-627)ELV054742129 (ELSEVIER)S0376-7388(21)00560-3 DE-627 ger DE-627 rakwb eng 540 VZ 35.17 bkl 58.50 bkl 43.12 bkl Huang, Henghui verfasserin aut Mitigation of chemical degradation in perfluorosulfonic acid proton exchange membrane using regenerable hindered amine functionalized carbon quantum dots 2021transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The chemical stability of perfluorosulfonic acid (PFSA) has a significant impact on the lifetime of a proton exchange membrane (PEM). Herein, we describe the design and fabrication of a novel PEM containing hindered amine functionalized carbon quantum dots (HA-CQDs) to improve the PEM's chemical stability. The novel CQDs are prepared by a hydrothermal reaction using citric acid as the carbon source, while groups of the free radical scavenger 4-amino-2, 2,6,6-tetramethylpiperidine are used to modify the oxygen-containing groups on the CQDs' surface. Benefiting from the introduction of the radical-scavenging groups, the HA-CQDs effectively eliminate active free radicals, thereby improving the PEM's chemical stability. Mass loss, FTIR, SEM, and SAXS are used to evaluate the PEM's chemical stability, surface morphology, and proton conduction by side-chain functional groups via free radicals. The electrochemical performance of the oxidized PEM is evaluated from proton conductivity and single-cell performance, and the free radical scavenging capability is characterized using the 1,1-diphenyl-2-picrylhydrazyl radical (DPPH) radical method. Our work reveals that introducing hindered amines can eliminate the free radicals generated by electrochemical reactions and effectively mitigate the chemical degradation of a PEM. This paper provides a promising way to improve the chemical stability of PFSA and enhance the lifetime of PEMs. The chemical stability of perfluorosulfonic acid (PFSA) has a significant impact on the lifetime of a proton exchange membrane (PEM). Herein, we describe the design and fabrication of a novel PEM containing hindered amine functionalized carbon quantum dots (HA-CQDs) to improve the PEM's chemical stability. The novel CQDs are prepared by a hydrothermal reaction using citric acid as the carbon source, while groups of the free radical scavenger 4-amino-2, 2,6,6-tetramethylpiperidine are used to modify the oxygen-containing groups on the CQDs' surface. Benefiting from the introduction of the radical-scavenging groups, the HA-CQDs effectively eliminate active free radicals, thereby improving the PEM's chemical stability. Mass loss, FTIR, SEM, and SAXS are used to evaluate the PEM's chemical stability, surface morphology, and proton conduction by side-chain functional groups via free radicals. The electrochemical performance of the oxidized PEM is evaluated from proton conductivity and single-cell performance, and the free radical scavenging capability is characterized using the 1,1-diphenyl-2-picrylhydrazyl radical (DPPH) radical method. Our work reveals that introducing hindered amines can eliminate the free radicals generated by electrochemical reactions and effectively mitigate the chemical degradation of a PEM. This paper provides a promising way to improve the chemical stability of PFSA and enhance the lifetime of PEMs. Hindered amine Elsevier Chemical stability Elsevier Radical scavenger groups Elsevier Proton exchange membrane Elsevier Single-cell performance Elsevier Xu, Shaoyi oth Zhou, Jiexin oth Luo, Feiyan oth Fan, Jiantao oth Li, Hui oth Enthalten in Elsevier Yue, Xin-Zheng ELSEVIER Steering charge kinetics in W 2019 the official journal of the North American Membrane Society New York, NY [u.a.] (DE-627)ELV002478420 volume:636 year:2021 day:15 month:10 pages:0 https://doi.org/10.1016/j.memsci.2021.119614 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA 35.17 Katalyse VZ 58.50 Umwelttechnik: Allgemeines VZ 43.12 Umweltchemie VZ AR 636 2021 15 1015 0 |
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Mitigation of chemical degradation in perfluorosulfonic acid proton exchange membrane using regenerable hindered amine functionalized carbon quantum dots |
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The chemical stability of perfluorosulfonic acid (PFSA) has a significant impact on the lifetime of a proton exchange membrane (PEM). Herein, we describe the design and fabrication of a novel PEM containing hindered amine functionalized carbon quantum dots (HA-CQDs) to improve the PEM's chemical stability. The novel CQDs are prepared by a hydrothermal reaction using citric acid as the carbon source, while groups of the free radical scavenger 4-amino-2, 2,6,6-tetramethylpiperidine are used to modify the oxygen-containing groups on the CQDs' surface. Benefiting from the introduction of the radical-scavenging groups, the HA-CQDs effectively eliminate active free radicals, thereby improving the PEM's chemical stability. Mass loss, FTIR, SEM, and SAXS are used to evaluate the PEM's chemical stability, surface morphology, and proton conduction by side-chain functional groups via free radicals. The electrochemical performance of the oxidized PEM is evaluated from proton conductivity and single-cell performance, and the free radical scavenging capability is characterized using the 1,1-diphenyl-2-picrylhydrazyl radical (DPPH) radical method. Our work reveals that introducing hindered amines can eliminate the free radicals generated by electrochemical reactions and effectively mitigate the chemical degradation of a PEM. This paper provides a promising way to improve the chemical stability of PFSA and enhance the lifetime of PEMs. |
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The chemical stability of perfluorosulfonic acid (PFSA) has a significant impact on the lifetime of a proton exchange membrane (PEM). Herein, we describe the design and fabrication of a novel PEM containing hindered amine functionalized carbon quantum dots (HA-CQDs) to improve the PEM's chemical stability. The novel CQDs are prepared by a hydrothermal reaction using citric acid as the carbon source, while groups of the free radical scavenger 4-amino-2, 2,6,6-tetramethylpiperidine are used to modify the oxygen-containing groups on the CQDs' surface. Benefiting from the introduction of the radical-scavenging groups, the HA-CQDs effectively eliminate active free radicals, thereby improving the PEM's chemical stability. Mass loss, FTIR, SEM, and SAXS are used to evaluate the PEM's chemical stability, surface morphology, and proton conduction by side-chain functional groups via free radicals. The electrochemical performance of the oxidized PEM is evaluated from proton conductivity and single-cell performance, and the free radical scavenging capability is characterized using the 1,1-diphenyl-2-picrylhydrazyl radical (DPPH) radical method. Our work reveals that introducing hindered amines can eliminate the free radicals generated by electrochemical reactions and effectively mitigate the chemical degradation of a PEM. This paper provides a promising way to improve the chemical stability of PFSA and enhance the lifetime of PEMs. |
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The chemical stability of perfluorosulfonic acid (PFSA) has a significant impact on the lifetime of a proton exchange membrane (PEM). Herein, we describe the design and fabrication of a novel PEM containing hindered amine functionalized carbon quantum dots (HA-CQDs) to improve the PEM's chemical stability. The novel CQDs are prepared by a hydrothermal reaction using citric acid as the carbon source, while groups of the free radical scavenger 4-amino-2, 2,6,6-tetramethylpiperidine are used to modify the oxygen-containing groups on the CQDs' surface. Benefiting from the introduction of the radical-scavenging groups, the HA-CQDs effectively eliminate active free radicals, thereby improving the PEM's chemical stability. Mass loss, FTIR, SEM, and SAXS are used to evaluate the PEM's chemical stability, surface morphology, and proton conduction by side-chain functional groups via free radicals. The electrochemical performance of the oxidized PEM is evaluated from proton conductivity and single-cell performance, and the free radical scavenging capability is characterized using the 1,1-diphenyl-2-picrylhydrazyl radical (DPPH) radical method. Our work reveals that introducing hindered amines can eliminate the free radicals generated by electrochemical reactions and effectively mitigate the chemical degradation of a PEM. This paper provides a promising way to improve the chemical stability of PFSA and enhance the lifetime of PEMs. |
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