A Heterostructure Coupling of Exfoliated Ni–Fe Hydroxide Nanosheet and Defective Graphene as a Bifunctional Electrocatalyst for Overall Water Splitting
Herein, the authors demonstrate a heterostructured NiFe LDH‐NSDG10 hybrid catalyst by coupling of exfoliated Ni–Fe layered double hydroxide (LDH) nanosheet (NS) and defective graphene (DG). The catalyst has exhibited extremely high electrocatalytic activity for oxygen evolution reaction (OER) in an...
Ausführliche Beschreibung
Autor*in: |
Jia, Yi [verfasserIn] |
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Artikel |
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Sprache: |
Englisch |
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2017 |
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Rechteinformationen: |
Nutzungsrecht: © 2017 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim |
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Schlagwörter: |
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Systematik: |
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Übergeordnetes Werk: |
Enthalten in: Advanced materials - Weinheim : Wiley-VCH Verl., 1988, 29(2017), 17 |
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Übergeordnetes Werk: |
volume:29 ; year:2017 ; number:17 |
Links: |
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DOI / URN: |
10.1002/adma.201700017 |
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Katalog-ID: |
OLC199317737X |
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520 | |a Herein, the authors demonstrate a heterostructured NiFe LDH‐NSDG10 hybrid catalyst by coupling of exfoliated Ni–Fe layered double hydroxide (LDH) nanosheet (NS) and defective graphene (DG). The catalyst has exhibited extremely high electrocatalytic activity for oxygen evolution reaction (OER) in an alkaline solution with an overpotential of 0.21 V at a current density of 10 mA cm −2 , which is comparable to the current record (≈0.20 V in Fe–Co–Ni metal‐oxide‐film system) and superior to all other non‐noble metal catalysts. Also, it possesses outstanding kinetics (Tafel slope of 52 mV dec −1 ) for the reaction. Interestingly, the NiFe LDH‐NS@DG10 hybrid has also exhibited the high hydrogen evolution reaction (HER) performance in an alkaline solution (with an overpotential of 115 mV by 2 mg cm −2 loading at a current density of 20 mA cm −2 ) in contrast to barely HER activity for NiFe LDH‐NS itself. As a result, the bifunctional catalyst the authors developed can achieve a current density of 20 mA cm −2 by a voltage of only 1.5 V, which is also a record for the overall water splitting. Density functional theory calculation reveals that the synergetic effects of highly exposed 3d transition metal atoms and carbon defects are essential for the bifunctional activity for OER and HER. A heterostructure coupling of exfoliated Ni–Fe hydroxide nanosheet and defective graphene has been demonstrated, both experimentally and theoretically, to be active for electrocatalytic overall water splitting. Density functional theory calculations further reveal that the formed heterostrucutre can efficiently enhance the charge separation and redistribution, thus facilitating the hydrogen evolution reaction and oxygen evolution reaction conducted on defective graphene and NiFe layered double hydroxide nanosheet, respectively. | ||
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650 | 4 | |a heteroassembly | |
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650 | 4 | |a layered double hydroxide | |
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700 | 1 | |a Chen, Hua |4 oth | |
700 | 1 | |a Wang, Bei |4 oth | |
700 | 1 | |a Zhou, Jizhi |4 oth | |
700 | 1 | |a Soo, Mun Teng |4 oth | |
700 | 1 | |a Hong, Min |4 oth | |
700 | 1 | |a Yan, Xuecheng |4 oth | |
700 | 1 | |a Qian, Guangren |4 oth | |
700 | 1 | |a Zou, Jin |4 oth | |
700 | 1 | |a Du, Aijun |4 oth | |
700 | 1 | |a Yao, Xiangdong |4 oth | |
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10.1002/adma.201700017 doi PQ20170501 (DE-627)OLC199317737X (DE-599)GBVOLC199317737X (PRQ)s747-c95c168c7c2422b72df085c61d61ee519c9c7da506c20cc7a7e7d0d95b6b90e73 (KEY)0178503620170000029001700000heterostructurecouplingofexfoliatednifehydroxidena DE-627 ger DE-627 rakwb eng 620 540 DE-101 540 AVZ UA 1538 AVZ rvk Jia, Yi verfasserin aut A Heterostructure Coupling of Exfoliated Ni–Fe Hydroxide Nanosheet and Defective Graphene as a Bifunctional Electrocatalyst for Overall Water Splitting 2017 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier Herein, the authors demonstrate a heterostructured NiFe LDH‐NSDG10 hybrid catalyst by coupling of exfoliated Ni–Fe layered double hydroxide (LDH) nanosheet (NS) and defective graphene (DG). The catalyst has exhibited extremely high electrocatalytic activity for oxygen evolution reaction (OER) in an alkaline solution with an overpotential of 0.21 V at a current density of 10 mA cm −2 , which is comparable to the current record (≈0.20 V in Fe–Co–Ni metal‐oxide‐film system) and superior to all other non‐noble metal catalysts. Also, it possesses outstanding kinetics (Tafel slope of 52 mV dec −1 ) for the reaction. Interestingly, the NiFe LDH‐NS@DG10 hybrid has also exhibited the high hydrogen evolution reaction (HER) performance in an alkaline solution (with an overpotential of 115 mV by 2 mg cm −2 loading at a current density of 20 mA cm −2 ) in contrast to barely HER activity for NiFe LDH‐NS itself. As a result, the bifunctional catalyst the authors developed can achieve a current density of 20 mA cm −2 by a voltage of only 1.5 V, which is also a record for the overall water splitting. Density functional theory calculation reveals that the synergetic effects of highly exposed 3d transition metal atoms and carbon defects are essential for the bifunctional activity for OER and HER. A heterostructure coupling of exfoliated Ni–Fe hydroxide nanosheet and defective graphene has been demonstrated, both experimentally and theoretically, to be active for electrocatalytic overall water splitting. Density functional theory calculations further reveal that the formed heterostrucutre can efficiently enhance the charge separation and redistribution, thus facilitating the hydrogen evolution reaction and oxygen evolution reaction conducted on defective graphene and NiFe layered double hydroxide nanosheet, respectively. Nutzungsrecht: © 2017 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim heteroassembly nonprecious electrocatalysts graphene defects layered double hydroxide Zhang, Longzhou oth Gao, Guoping oth Chen, Hua oth Wang, Bei oth Zhou, Jizhi oth Soo, Mun Teng oth Hong, Min oth Yan, Xuecheng oth Qian, Guangren oth Zou, Jin oth Du, Aijun oth Yao, Xiangdong oth Enthalten in Advanced materials Weinheim : Wiley-VCH Verl., 1988 29(2017), 17 (DE-627)130815152 (DE-600)1012489-5 (DE-576)023057149 0935-9648 nnns volume:29 year:2017 number:17 http://dx.doi.org/10.1002/adma.201700017 Volltext http://onlinelibrary.wiley.com/doi/10.1002/adma.201700017/abstract GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-CHE SSG-OLC-PHA SSG-OLC-DE-84 GBV_ILN_70 GBV_ILN_95 GBV_ILN_267 GBV_ILN_2004 GBV_ILN_2016 GBV_ILN_2018 GBV_ILN_2095 GBV_ILN_4306 UA 1538 AR 29 2017 17 |
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10.1002/adma.201700017 doi PQ20170501 (DE-627)OLC199317737X (DE-599)GBVOLC199317737X (PRQ)s747-c95c168c7c2422b72df085c61d61ee519c9c7da506c20cc7a7e7d0d95b6b90e73 (KEY)0178503620170000029001700000heterostructurecouplingofexfoliatednifehydroxidena DE-627 ger DE-627 rakwb eng 620 540 DE-101 540 AVZ UA 1538 AVZ rvk Jia, Yi verfasserin aut A Heterostructure Coupling of Exfoliated Ni–Fe Hydroxide Nanosheet and Defective Graphene as a Bifunctional Electrocatalyst for Overall Water Splitting 2017 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier Herein, the authors demonstrate a heterostructured NiFe LDH‐NSDG10 hybrid catalyst by coupling of exfoliated Ni–Fe layered double hydroxide (LDH) nanosheet (NS) and defective graphene (DG). The catalyst has exhibited extremely high electrocatalytic activity for oxygen evolution reaction (OER) in an alkaline solution with an overpotential of 0.21 V at a current density of 10 mA cm −2 , which is comparable to the current record (≈0.20 V in Fe–Co–Ni metal‐oxide‐film system) and superior to all other non‐noble metal catalysts. Also, it possesses outstanding kinetics (Tafel slope of 52 mV dec −1 ) for the reaction. Interestingly, the NiFe LDH‐NS@DG10 hybrid has also exhibited the high hydrogen evolution reaction (HER) performance in an alkaline solution (with an overpotential of 115 mV by 2 mg cm −2 loading at a current density of 20 mA cm −2 ) in contrast to barely HER activity for NiFe LDH‐NS itself. As a result, the bifunctional catalyst the authors developed can achieve a current density of 20 mA cm −2 by a voltage of only 1.5 V, which is also a record for the overall water splitting. Density functional theory calculation reveals that the synergetic effects of highly exposed 3d transition metal atoms and carbon defects are essential for the bifunctional activity for OER and HER. A heterostructure coupling of exfoliated Ni–Fe hydroxide nanosheet and defective graphene has been demonstrated, both experimentally and theoretically, to be active for electrocatalytic overall water splitting. Density functional theory calculations further reveal that the formed heterostrucutre can efficiently enhance the charge separation and redistribution, thus facilitating the hydrogen evolution reaction and oxygen evolution reaction conducted on defective graphene and NiFe layered double hydroxide nanosheet, respectively. Nutzungsrecht: © 2017 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim heteroassembly nonprecious electrocatalysts graphene defects layered double hydroxide Zhang, Longzhou oth Gao, Guoping oth Chen, Hua oth Wang, Bei oth Zhou, Jizhi oth Soo, Mun Teng oth Hong, Min oth Yan, Xuecheng oth Qian, Guangren oth Zou, Jin oth Du, Aijun oth Yao, Xiangdong oth Enthalten in Advanced materials Weinheim : Wiley-VCH Verl., 1988 29(2017), 17 (DE-627)130815152 (DE-600)1012489-5 (DE-576)023057149 0935-9648 nnns volume:29 year:2017 number:17 http://dx.doi.org/10.1002/adma.201700017 Volltext http://onlinelibrary.wiley.com/doi/10.1002/adma.201700017/abstract GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-CHE SSG-OLC-PHA SSG-OLC-DE-84 GBV_ILN_70 GBV_ILN_95 GBV_ILN_267 GBV_ILN_2004 GBV_ILN_2016 GBV_ILN_2018 GBV_ILN_2095 GBV_ILN_4306 UA 1538 AR 29 2017 17 |
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10.1002/adma.201700017 doi PQ20170501 (DE-627)OLC199317737X (DE-599)GBVOLC199317737X (PRQ)s747-c95c168c7c2422b72df085c61d61ee519c9c7da506c20cc7a7e7d0d95b6b90e73 (KEY)0178503620170000029001700000heterostructurecouplingofexfoliatednifehydroxidena DE-627 ger DE-627 rakwb eng 620 540 DE-101 540 AVZ UA 1538 AVZ rvk Jia, Yi verfasserin aut A Heterostructure Coupling of Exfoliated Ni–Fe Hydroxide Nanosheet and Defective Graphene as a Bifunctional Electrocatalyst for Overall Water Splitting 2017 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier Herein, the authors demonstrate a heterostructured NiFe LDH‐NSDG10 hybrid catalyst by coupling of exfoliated Ni–Fe layered double hydroxide (LDH) nanosheet (NS) and defective graphene (DG). The catalyst has exhibited extremely high electrocatalytic activity for oxygen evolution reaction (OER) in an alkaline solution with an overpotential of 0.21 V at a current density of 10 mA cm −2 , which is comparable to the current record (≈0.20 V in Fe–Co–Ni metal‐oxide‐film system) and superior to all other non‐noble metal catalysts. Also, it possesses outstanding kinetics (Tafel slope of 52 mV dec −1 ) for the reaction. Interestingly, the NiFe LDH‐NS@DG10 hybrid has also exhibited the high hydrogen evolution reaction (HER) performance in an alkaline solution (with an overpotential of 115 mV by 2 mg cm −2 loading at a current density of 20 mA cm −2 ) in contrast to barely HER activity for NiFe LDH‐NS itself. As a result, the bifunctional catalyst the authors developed can achieve a current density of 20 mA cm −2 by a voltage of only 1.5 V, which is also a record for the overall water splitting. Density functional theory calculation reveals that the synergetic effects of highly exposed 3d transition metal atoms and carbon defects are essential for the bifunctional activity for OER and HER. A heterostructure coupling of exfoliated Ni–Fe hydroxide nanosheet and defective graphene has been demonstrated, both experimentally and theoretically, to be active for electrocatalytic overall water splitting. Density functional theory calculations further reveal that the formed heterostrucutre can efficiently enhance the charge separation and redistribution, thus facilitating the hydrogen evolution reaction and oxygen evolution reaction conducted on defective graphene and NiFe layered double hydroxide nanosheet, respectively. Nutzungsrecht: © 2017 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim heteroassembly nonprecious electrocatalysts graphene defects layered double hydroxide Zhang, Longzhou oth Gao, Guoping oth Chen, Hua oth Wang, Bei oth Zhou, Jizhi oth Soo, Mun Teng oth Hong, Min oth Yan, Xuecheng oth Qian, Guangren oth Zou, Jin oth Du, Aijun oth Yao, Xiangdong oth Enthalten in Advanced materials Weinheim : Wiley-VCH Verl., 1988 29(2017), 17 (DE-627)130815152 (DE-600)1012489-5 (DE-576)023057149 0935-9648 nnns volume:29 year:2017 number:17 http://dx.doi.org/10.1002/adma.201700017 Volltext http://onlinelibrary.wiley.com/doi/10.1002/adma.201700017/abstract GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-CHE SSG-OLC-PHA SSG-OLC-DE-84 GBV_ILN_70 GBV_ILN_95 GBV_ILN_267 GBV_ILN_2004 GBV_ILN_2016 GBV_ILN_2018 GBV_ILN_2095 GBV_ILN_4306 UA 1538 AR 29 2017 17 |
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10.1002/adma.201700017 doi PQ20170501 (DE-627)OLC199317737X (DE-599)GBVOLC199317737X (PRQ)s747-c95c168c7c2422b72df085c61d61ee519c9c7da506c20cc7a7e7d0d95b6b90e73 (KEY)0178503620170000029001700000heterostructurecouplingofexfoliatednifehydroxidena DE-627 ger DE-627 rakwb eng 620 540 DE-101 540 AVZ UA 1538 AVZ rvk Jia, Yi verfasserin aut A Heterostructure Coupling of Exfoliated Ni–Fe Hydroxide Nanosheet and Defective Graphene as a Bifunctional Electrocatalyst for Overall Water Splitting 2017 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier Herein, the authors demonstrate a heterostructured NiFe LDH‐NSDG10 hybrid catalyst by coupling of exfoliated Ni–Fe layered double hydroxide (LDH) nanosheet (NS) and defective graphene (DG). The catalyst has exhibited extremely high electrocatalytic activity for oxygen evolution reaction (OER) in an alkaline solution with an overpotential of 0.21 V at a current density of 10 mA cm −2 , which is comparable to the current record (≈0.20 V in Fe–Co–Ni metal‐oxide‐film system) and superior to all other non‐noble metal catalysts. Also, it possesses outstanding kinetics (Tafel slope of 52 mV dec −1 ) for the reaction. Interestingly, the NiFe LDH‐NS@DG10 hybrid has also exhibited the high hydrogen evolution reaction (HER) performance in an alkaline solution (with an overpotential of 115 mV by 2 mg cm −2 loading at a current density of 20 mA cm −2 ) in contrast to barely HER activity for NiFe LDH‐NS itself. As a result, the bifunctional catalyst the authors developed can achieve a current density of 20 mA cm −2 by a voltage of only 1.5 V, which is also a record for the overall water splitting. Density functional theory calculation reveals that the synergetic effects of highly exposed 3d transition metal atoms and carbon defects are essential for the bifunctional activity for OER and HER. A heterostructure coupling of exfoliated Ni–Fe hydroxide nanosheet and defective graphene has been demonstrated, both experimentally and theoretically, to be active for electrocatalytic overall water splitting. Density functional theory calculations further reveal that the formed heterostrucutre can efficiently enhance the charge separation and redistribution, thus facilitating the hydrogen evolution reaction and oxygen evolution reaction conducted on defective graphene and NiFe layered double hydroxide nanosheet, respectively. Nutzungsrecht: © 2017 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim heteroassembly nonprecious electrocatalysts graphene defects layered double hydroxide Zhang, Longzhou oth Gao, Guoping oth Chen, Hua oth Wang, Bei oth Zhou, Jizhi oth Soo, Mun Teng oth Hong, Min oth Yan, Xuecheng oth Qian, Guangren oth Zou, Jin oth Du, Aijun oth Yao, Xiangdong oth Enthalten in Advanced materials Weinheim : Wiley-VCH Verl., 1988 29(2017), 17 (DE-627)130815152 (DE-600)1012489-5 (DE-576)023057149 0935-9648 nnns volume:29 year:2017 number:17 http://dx.doi.org/10.1002/adma.201700017 Volltext http://onlinelibrary.wiley.com/doi/10.1002/adma.201700017/abstract GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-CHE SSG-OLC-PHA SSG-OLC-DE-84 GBV_ILN_70 GBV_ILN_95 GBV_ILN_267 GBV_ILN_2004 GBV_ILN_2016 GBV_ILN_2018 GBV_ILN_2095 GBV_ILN_4306 UA 1538 AR 29 2017 17 |
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10.1002/adma.201700017 doi PQ20170501 (DE-627)OLC199317737X (DE-599)GBVOLC199317737X (PRQ)s747-c95c168c7c2422b72df085c61d61ee519c9c7da506c20cc7a7e7d0d95b6b90e73 (KEY)0178503620170000029001700000heterostructurecouplingofexfoliatednifehydroxidena DE-627 ger DE-627 rakwb eng 620 540 DE-101 540 AVZ UA 1538 AVZ rvk Jia, Yi verfasserin aut A Heterostructure Coupling of Exfoliated Ni–Fe Hydroxide Nanosheet and Defective Graphene as a Bifunctional Electrocatalyst for Overall Water Splitting 2017 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier Herein, the authors demonstrate a heterostructured NiFe LDH‐NSDG10 hybrid catalyst by coupling of exfoliated Ni–Fe layered double hydroxide (LDH) nanosheet (NS) and defective graphene (DG). The catalyst has exhibited extremely high electrocatalytic activity for oxygen evolution reaction (OER) in an alkaline solution with an overpotential of 0.21 V at a current density of 10 mA cm −2 , which is comparable to the current record (≈0.20 V in Fe–Co–Ni metal‐oxide‐film system) and superior to all other non‐noble metal catalysts. Also, it possesses outstanding kinetics (Tafel slope of 52 mV dec −1 ) for the reaction. Interestingly, the NiFe LDH‐NS@DG10 hybrid has also exhibited the high hydrogen evolution reaction (HER) performance in an alkaline solution (with an overpotential of 115 mV by 2 mg cm −2 loading at a current density of 20 mA cm −2 ) in contrast to barely HER activity for NiFe LDH‐NS itself. As a result, the bifunctional catalyst the authors developed can achieve a current density of 20 mA cm −2 by a voltage of only 1.5 V, which is also a record for the overall water splitting. Density functional theory calculation reveals that the synergetic effects of highly exposed 3d transition metal atoms and carbon defects are essential for the bifunctional activity for OER and HER. A heterostructure coupling of exfoliated Ni–Fe hydroxide nanosheet and defective graphene has been demonstrated, both experimentally and theoretically, to be active for electrocatalytic overall water splitting. Density functional theory calculations further reveal that the formed heterostrucutre can efficiently enhance the charge separation and redistribution, thus facilitating the hydrogen evolution reaction and oxygen evolution reaction conducted on defective graphene and NiFe layered double hydroxide nanosheet, respectively. Nutzungsrecht: © 2017 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim heteroassembly nonprecious electrocatalysts graphene defects layered double hydroxide Zhang, Longzhou oth Gao, Guoping oth Chen, Hua oth Wang, Bei oth Zhou, Jizhi oth Soo, Mun Teng oth Hong, Min oth Yan, Xuecheng oth Qian, Guangren oth Zou, Jin oth Du, Aijun oth Yao, Xiangdong oth Enthalten in Advanced materials Weinheim : Wiley-VCH Verl., 1988 29(2017), 17 (DE-627)130815152 (DE-600)1012489-5 (DE-576)023057149 0935-9648 nnns volume:29 year:2017 number:17 http://dx.doi.org/10.1002/adma.201700017 Volltext http://onlinelibrary.wiley.com/doi/10.1002/adma.201700017/abstract GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-CHE SSG-OLC-PHA SSG-OLC-DE-84 GBV_ILN_70 GBV_ILN_95 GBV_ILN_267 GBV_ILN_2004 GBV_ILN_2016 GBV_ILN_2018 GBV_ILN_2095 GBV_ILN_4306 UA 1538 AR 29 2017 17 |
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Jia, Yi @@aut@@ Zhang, Longzhou @@oth@@ Gao, Guoping @@oth@@ Chen, Hua @@oth@@ Wang, Bei @@oth@@ Zhou, Jizhi @@oth@@ Soo, Mun Teng @@oth@@ Hong, Min @@oth@@ Yan, Xuecheng @@oth@@ Qian, Guangren @@oth@@ Zou, Jin @@oth@@ Du, Aijun @@oth@@ Yao, Xiangdong @@oth@@ |
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A Heterostructure Coupling of Exfoliated Ni–Fe Hydroxide Nanosheet and Defective Graphene as a Bifunctional Electrocatalyst for Overall Water Splitting |
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A Heterostructure Coupling of Exfoliated Ni–Fe Hydroxide Nanosheet and Defective Graphene as a Bifunctional Electrocatalyst for Overall Water Splitting |
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heterostructure coupling of exfoliated ni–fe hydroxide nanosheet and defective graphene as a bifunctional electrocatalyst for overall water splitting |
title_auth |
A Heterostructure Coupling of Exfoliated Ni–Fe Hydroxide Nanosheet and Defective Graphene as a Bifunctional Electrocatalyst for Overall Water Splitting |
abstract |
Herein, the authors demonstrate a heterostructured NiFe LDH‐NSDG10 hybrid catalyst by coupling of exfoliated Ni–Fe layered double hydroxide (LDH) nanosheet (NS) and defective graphene (DG). The catalyst has exhibited extremely high electrocatalytic activity for oxygen evolution reaction (OER) in an alkaline solution with an overpotential of 0.21 V at a current density of 10 mA cm −2 , which is comparable to the current record (≈0.20 V in Fe–Co–Ni metal‐oxide‐film system) and superior to all other non‐noble metal catalysts. Also, it possesses outstanding kinetics (Tafel slope of 52 mV dec −1 ) for the reaction. Interestingly, the NiFe LDH‐NS@DG10 hybrid has also exhibited the high hydrogen evolution reaction (HER) performance in an alkaline solution (with an overpotential of 115 mV by 2 mg cm −2 loading at a current density of 20 mA cm −2 ) in contrast to barely HER activity for NiFe LDH‐NS itself. As a result, the bifunctional catalyst the authors developed can achieve a current density of 20 mA cm −2 by a voltage of only 1.5 V, which is also a record for the overall water splitting. Density functional theory calculation reveals that the synergetic effects of highly exposed 3d transition metal atoms and carbon defects are essential for the bifunctional activity for OER and HER. A heterostructure coupling of exfoliated Ni–Fe hydroxide nanosheet and defective graphene has been demonstrated, both experimentally and theoretically, to be active for electrocatalytic overall water splitting. Density functional theory calculations further reveal that the formed heterostrucutre can efficiently enhance the charge separation and redistribution, thus facilitating the hydrogen evolution reaction and oxygen evolution reaction conducted on defective graphene and NiFe layered double hydroxide nanosheet, respectively. |
abstractGer |
Herein, the authors demonstrate a heterostructured NiFe LDH‐NSDG10 hybrid catalyst by coupling of exfoliated Ni–Fe layered double hydroxide (LDH) nanosheet (NS) and defective graphene (DG). The catalyst has exhibited extremely high electrocatalytic activity for oxygen evolution reaction (OER) in an alkaline solution with an overpotential of 0.21 V at a current density of 10 mA cm −2 , which is comparable to the current record (≈0.20 V in Fe–Co–Ni metal‐oxide‐film system) and superior to all other non‐noble metal catalysts. Also, it possesses outstanding kinetics (Tafel slope of 52 mV dec −1 ) for the reaction. Interestingly, the NiFe LDH‐NS@DG10 hybrid has also exhibited the high hydrogen evolution reaction (HER) performance in an alkaline solution (with an overpotential of 115 mV by 2 mg cm −2 loading at a current density of 20 mA cm −2 ) in contrast to barely HER activity for NiFe LDH‐NS itself. As a result, the bifunctional catalyst the authors developed can achieve a current density of 20 mA cm −2 by a voltage of only 1.5 V, which is also a record for the overall water splitting. Density functional theory calculation reveals that the synergetic effects of highly exposed 3d transition metal atoms and carbon defects are essential for the bifunctional activity for OER and HER. A heterostructure coupling of exfoliated Ni–Fe hydroxide nanosheet and defective graphene has been demonstrated, both experimentally and theoretically, to be active for electrocatalytic overall water splitting. Density functional theory calculations further reveal that the formed heterostrucutre can efficiently enhance the charge separation and redistribution, thus facilitating the hydrogen evolution reaction and oxygen evolution reaction conducted on defective graphene and NiFe layered double hydroxide nanosheet, respectively. |
abstract_unstemmed |
Herein, the authors demonstrate a heterostructured NiFe LDH‐NSDG10 hybrid catalyst by coupling of exfoliated Ni–Fe layered double hydroxide (LDH) nanosheet (NS) and defective graphene (DG). The catalyst has exhibited extremely high electrocatalytic activity for oxygen evolution reaction (OER) in an alkaline solution with an overpotential of 0.21 V at a current density of 10 mA cm −2 , which is comparable to the current record (≈0.20 V in Fe–Co–Ni metal‐oxide‐film system) and superior to all other non‐noble metal catalysts. Also, it possesses outstanding kinetics (Tafel slope of 52 mV dec −1 ) for the reaction. Interestingly, the NiFe LDH‐NS@DG10 hybrid has also exhibited the high hydrogen evolution reaction (HER) performance in an alkaline solution (with an overpotential of 115 mV by 2 mg cm −2 loading at a current density of 20 mA cm −2 ) in contrast to barely HER activity for NiFe LDH‐NS itself. As a result, the bifunctional catalyst the authors developed can achieve a current density of 20 mA cm −2 by a voltage of only 1.5 V, which is also a record for the overall water splitting. Density functional theory calculation reveals that the synergetic effects of highly exposed 3d transition metal atoms and carbon defects are essential for the bifunctional activity for OER and HER. A heterostructure coupling of exfoliated Ni–Fe hydroxide nanosheet and defective graphene has been demonstrated, both experimentally and theoretically, to be active for electrocatalytic overall water splitting. Density functional theory calculations further reveal that the formed heterostrucutre can efficiently enhance the charge separation and redistribution, thus facilitating the hydrogen evolution reaction and oxygen evolution reaction conducted on defective graphene and NiFe layered double hydroxide nanosheet, respectively. |
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A Heterostructure Coupling of Exfoliated Ni–Fe Hydroxide Nanosheet and Defective Graphene as a Bifunctional Electrocatalyst for Overall Water Splitting |
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Zhang, Longzhou Gao, Guoping Chen, Hua Wang, Bei Zhou, Jizhi Soo, Mun Teng Hong, Min Yan, Xuecheng Qian, Guangren Zou, Jin Du, Aijun Yao, Xiangdong |
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The catalyst has exhibited extremely high electrocatalytic activity for oxygen evolution reaction (OER) in an alkaline solution with an overpotential of 0.21 V at a current density of 10 mA cm −2 , which is comparable to the current record (≈0.20 V in Fe–Co–Ni metal‐oxide‐film system) and superior to all other non‐noble metal catalysts. Also, it possesses outstanding kinetics (Tafel slope of 52 mV dec −1 ) for the reaction. Interestingly, the NiFe LDH‐NS@DG10 hybrid has also exhibited the high hydrogen evolution reaction (HER) performance in an alkaline solution (with an overpotential of 115 mV by 2 mg cm −2 loading at a current density of 20 mA cm −2 ) in contrast to barely HER activity for NiFe LDH‐NS itself. As a result, the bifunctional catalyst the authors developed can achieve a current density of 20 mA cm −2 by a voltage of only 1.5 V, which is also a record for the overall water splitting. Density functional theory calculation reveals that the synergetic effects of highly exposed 3d transition metal atoms and carbon defects are essential for the bifunctional activity for OER and HER. A heterostructure coupling of exfoliated Ni–Fe hydroxide nanosheet and defective graphene has been demonstrated, both experimentally and theoretically, to be active for electrocatalytic overall water splitting. Density functional theory calculations further reveal that the formed heterostrucutre can efficiently enhance the charge separation and redistribution, thus facilitating the hydrogen evolution reaction and oxygen evolution reaction conducted on defective graphene and NiFe layered double hydroxide nanosheet, respectively.</subfield></datafield><datafield tag="540" ind1=" " ind2=" "><subfield code="a">Nutzungsrecht: © 2017 WILEY‐VCH Verlag GmbH & Co. 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