Enhanced alkaline ammonia oxidation reaction activity using PtW alloy catalysts with tungsten as built-in competitor reservoir

Direct ammonia anion exchange membrane fuel cells (DA-AEMFCs) have drawn great attention recently with the recognition that liquid ammonia (NH3), as a carbon-free hydrogen storage medium, is easy to store, transport, and distribute. However, its practical application is significantly limited by the...
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Gespeichert in:

Autor*in:	Huan, Yunfei [verfasserIn] Jiang, Yuzhuo [verfasserIn] Wang, Mengfan [verfasserIn] Zhou, Xi [verfasserIn] Shen, Xiaowei [verfasserIn] Cao, Yufeng [verfasserIn] Yan, Chenglin [verfasserIn] Qian, Tao [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2023

Schlagwörter:	Electrocatalysis Ammonia oxidation reaction PtW alloy Competitive adsorption Direct ammonia fuel cells

Übergeordnetes Werk:	Enthalten in: The chemical engineering journal - Amsterdam : Elsevier, 1997, 475
Übergeordnetes Werk:	volume:475

DOI / URN:	10.1016/j.cej.2023.146027

Katalog-ID:	ELV065302710

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520			\|a Direct ammonia anion exchange membrane fuel cells (DA-AEMFCs) have drawn great attention recently with the recognition that liquid ammonia (NH3), as a carbon-free hydrogen storage medium, is easy to store, transport, and distribute. However, its practical application is significantly limited by the anodic ammonia oxidation reaction (AOR), which not only is kinetically sluggish, but also suffers from competitive adsorption of oxidizing agent, OH–. Herein, we tackle the above challenges simultaneously by alloying the highly active platinum with electron-deficient tungsten. The W sites would preferentially adsorb OH to serve as the reservoir and supply for the dehydrogenation of NH3. The Pt sites are thus liberated and free for the targeting adsorption of NH3. Moreover, density functional theory calculations suggest that, with the pre-adsorption of OH, the d band center of PtW alloy experiences a positive shift toward the Fermi level, which would contribute to stronger adsorption of the reaction intermediates and thus benefit the whole AOR process. As expected, the synthesized alloy with the optimum ratio exhibits a low onset potential of 0.46 V versus reversible hydrogen electrode and a large peak current density of 11.70 mA cm−2. When subjected to practical application, the DA-AEMFCs assembled with such electrocatalyst deliver an excellent peak power density of 22.47 mW cm−2, indicating its potential feasibility in the next-generation energy devices.
650		4	\|a Electrocatalysis
650		4	\|a Ammonia oxidation reaction
650		4	\|a PtW alloy
650		4	\|a Competitive adsorption
650		4	\|a Direct ammonia fuel cells
700	1		\|a Jiang, Yuzhuo \|e verfasserin \|4 aut
700	1		\|a Wang, Mengfan \|e verfasserin \|4 aut
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700	1		\|a Shen, Xiaowei \|e verfasserin \|4 aut
700	1		\|a Cao, Yufeng \|e verfasserin \|4 aut
700	1		\|a Yan, Chenglin \|e verfasserin \|4 aut
700	1		\|a Qian, Tao \|e verfasserin \|4 aut
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allfields	10.1016/j.cej.2023.146027 doi (DE-627)ELV065302710 (ELSEVIER)S1385-8947(23)04758-7 DE-627 ger DE-627 rda eng 660 VZ 660 VZ 58.10 bkl Huan, Yunfei verfasserin aut Enhanced alkaline ammonia oxidation reaction activity using PtW alloy catalysts with tungsten as built-in competitor reservoir 2023 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Direct ammonia anion exchange membrane fuel cells (DA-AEMFCs) have drawn great attention recently with the recognition that liquid ammonia (NH3), as a carbon-free hydrogen storage medium, is easy to store, transport, and distribute. However, its practical application is significantly limited by the anodic ammonia oxidation reaction (AOR), which not only is kinetically sluggish, but also suffers from competitive adsorption of oxidizing agent, OH–. Herein, we tackle the above challenges simultaneously by alloying the highly active platinum with electron-deficient tungsten. The W sites would preferentially adsorb OH to serve as the reservoir and supply for the dehydrogenation of NH3. The Pt sites are thus liberated and free for the targeting adsorption of NH3. Moreover, density functional theory calculations suggest that, with the pre-adsorption of OH, the d band center of PtW alloy experiences a positive shift toward the Fermi level, which would contribute to stronger adsorption of the reaction intermediates and thus benefit the whole AOR process. As expected, the synthesized alloy with the optimum ratio exhibits a low onset potential of 0.46 V versus reversible hydrogen electrode and a large peak current density of 11.70 mA cm−2. When subjected to practical application, the DA-AEMFCs assembled with such electrocatalyst deliver an excellent peak power density of 22.47 mW cm−2, indicating its potential feasibility in the next-generation energy devices. Electrocatalysis Ammonia oxidation reaction PtW alloy Competitive adsorption Direct ammonia fuel cells Jiang, Yuzhuo verfasserin aut Wang, Mengfan verfasserin aut Zhou, Xi verfasserin aut Shen, Xiaowei verfasserin aut Cao, Yufeng verfasserin aut Yan, Chenglin verfasserin aut Qian, Tao verfasserin aut Enthalten in The chemical engineering journal Amsterdam : Elsevier, 1997 475 Online-Ressource (DE-627)320500322 (DE-600)2012137-4 (DE-576)098330152 1873-3212 nnns volume:475 GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2088 GBV_ILN_2106 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4242 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 58.10 Verfahrenstechnik: Allgemeines VZ AR 475
spelling	10.1016/j.cej.2023.146027 doi (DE-627)ELV065302710 (ELSEVIER)S1385-8947(23)04758-7 DE-627 ger DE-627 rda eng 660 VZ 660 VZ 58.10 bkl Huan, Yunfei verfasserin aut Enhanced alkaline ammonia oxidation reaction activity using PtW alloy catalysts with tungsten as built-in competitor reservoir 2023 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Direct ammonia anion exchange membrane fuel cells (DA-AEMFCs) have drawn great attention recently with the recognition that liquid ammonia (NH3), as a carbon-free hydrogen storage medium, is easy to store, transport, and distribute. However, its practical application is significantly limited by the anodic ammonia oxidation reaction (AOR), which not only is kinetically sluggish, but also suffers from competitive adsorption of oxidizing agent, OH–. Herein, we tackle the above challenges simultaneously by alloying the highly active platinum with electron-deficient tungsten. The W sites would preferentially adsorb OH to serve as the reservoir and supply for the dehydrogenation of NH3. The Pt sites are thus liberated and free for the targeting adsorption of NH3. Moreover, density functional theory calculations suggest that, with the pre-adsorption of OH, the d band center of PtW alloy experiences a positive shift toward the Fermi level, which would contribute to stronger adsorption of the reaction intermediates and thus benefit the whole AOR process. As expected, the synthesized alloy with the optimum ratio exhibits a low onset potential of 0.46 V versus reversible hydrogen electrode and a large peak current density of 11.70 mA cm−2. When subjected to practical application, the DA-AEMFCs assembled with such electrocatalyst deliver an excellent peak power density of 22.47 mW cm−2, indicating its potential feasibility in the next-generation energy devices. Electrocatalysis Ammonia oxidation reaction PtW alloy Competitive adsorption Direct ammonia fuel cells Jiang, Yuzhuo verfasserin aut Wang, Mengfan verfasserin aut Zhou, Xi verfasserin aut Shen, Xiaowei verfasserin aut Cao, Yufeng verfasserin aut Yan, Chenglin verfasserin aut Qian, Tao verfasserin aut Enthalten in The chemical engineering journal Amsterdam : Elsevier, 1997 475 Online-Ressource (DE-627)320500322 (DE-600)2012137-4 (DE-576)098330152 1873-3212 nnns volume:475 GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2088 GBV_ILN_2106 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4242 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 58.10 Verfahrenstechnik: Allgemeines VZ AR 475
allfields_unstemmed	10.1016/j.cej.2023.146027 doi (DE-627)ELV065302710 (ELSEVIER)S1385-8947(23)04758-7 DE-627 ger DE-627 rda eng 660 VZ 660 VZ 58.10 bkl Huan, Yunfei verfasserin aut Enhanced alkaline ammonia oxidation reaction activity using PtW alloy catalysts with tungsten as built-in competitor reservoir 2023 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Direct ammonia anion exchange membrane fuel cells (DA-AEMFCs) have drawn great attention recently with the recognition that liquid ammonia (NH3), as a carbon-free hydrogen storage medium, is easy to store, transport, and distribute. However, its practical application is significantly limited by the anodic ammonia oxidation reaction (AOR), which not only is kinetically sluggish, but also suffers from competitive adsorption of oxidizing agent, OH–. Herein, we tackle the above challenges simultaneously by alloying the highly active platinum with electron-deficient tungsten. The W sites would preferentially adsorb OH to serve as the reservoir and supply for the dehydrogenation of NH3. The Pt sites are thus liberated and free for the targeting adsorption of NH3. Moreover, density functional theory calculations suggest that, with the pre-adsorption of OH, the d band center of PtW alloy experiences a positive shift toward the Fermi level, which would contribute to stronger adsorption of the reaction intermediates and thus benefit the whole AOR process. As expected, the synthesized alloy with the optimum ratio exhibits a low onset potential of 0.46 V versus reversible hydrogen electrode and a large peak current density of 11.70 mA cm−2. When subjected to practical application, the DA-AEMFCs assembled with such electrocatalyst deliver an excellent peak power density of 22.47 mW cm−2, indicating its potential feasibility in the next-generation energy devices. Electrocatalysis Ammonia oxidation reaction PtW alloy Competitive adsorption Direct ammonia fuel cells Jiang, Yuzhuo verfasserin aut Wang, Mengfan verfasserin aut Zhou, Xi verfasserin aut Shen, Xiaowei verfasserin aut Cao, Yufeng verfasserin aut Yan, Chenglin verfasserin aut Qian, Tao verfasserin aut Enthalten in The chemical engineering journal Amsterdam : Elsevier, 1997 475 Online-Ressource (DE-627)320500322 (DE-600)2012137-4 (DE-576)098330152 1873-3212 nnns volume:475 GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2088 GBV_ILN_2106 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4242 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 58.10 Verfahrenstechnik: Allgemeines VZ AR 475
allfieldsGer	10.1016/j.cej.2023.146027 doi (DE-627)ELV065302710 (ELSEVIER)S1385-8947(23)04758-7 DE-627 ger DE-627 rda eng 660 VZ 660 VZ 58.10 bkl Huan, Yunfei verfasserin aut Enhanced alkaline ammonia oxidation reaction activity using PtW alloy catalysts with tungsten as built-in competitor reservoir 2023 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Direct ammonia anion exchange membrane fuel cells (DA-AEMFCs) have drawn great attention recently with the recognition that liquid ammonia (NH3), as a carbon-free hydrogen storage medium, is easy to store, transport, and distribute. However, its practical application is significantly limited by the anodic ammonia oxidation reaction (AOR), which not only is kinetically sluggish, but also suffers from competitive adsorption of oxidizing agent, OH–. Herein, we tackle the above challenges simultaneously by alloying the highly active platinum with electron-deficient tungsten. The W sites would preferentially adsorb OH to serve as the reservoir and supply for the dehydrogenation of NH3. The Pt sites are thus liberated and free for the targeting adsorption of NH3. Moreover, density functional theory calculations suggest that, with the pre-adsorption of OH, the d band center of PtW alloy experiences a positive shift toward the Fermi level, which would contribute to stronger adsorption of the reaction intermediates and thus benefit the whole AOR process. As expected, the synthesized alloy with the optimum ratio exhibits a low onset potential of 0.46 V versus reversible hydrogen electrode and a large peak current density of 11.70 mA cm−2. When subjected to practical application, the DA-AEMFCs assembled with such electrocatalyst deliver an excellent peak power density of 22.47 mW cm−2, indicating its potential feasibility in the next-generation energy devices. Electrocatalysis Ammonia oxidation reaction PtW alloy Competitive adsorption Direct ammonia fuel cells Jiang, Yuzhuo verfasserin aut Wang, Mengfan verfasserin aut Zhou, Xi verfasserin aut Shen, Xiaowei verfasserin aut Cao, Yufeng verfasserin aut Yan, Chenglin verfasserin aut Qian, Tao verfasserin aut Enthalten in The chemical engineering journal Amsterdam : Elsevier, 1997 475 Online-Ressource (DE-627)320500322 (DE-600)2012137-4 (DE-576)098330152 1873-3212 nnns volume:475 GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2088 GBV_ILN_2106 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4242 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 58.10 Verfahrenstechnik: Allgemeines VZ AR 475
allfieldsSound	10.1016/j.cej.2023.146027 doi (DE-627)ELV065302710 (ELSEVIER)S1385-8947(23)04758-7 DE-627 ger DE-627 rda eng 660 VZ 660 VZ 58.10 bkl Huan, Yunfei verfasserin aut Enhanced alkaline ammonia oxidation reaction activity using PtW alloy catalysts with tungsten as built-in competitor reservoir 2023 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Direct ammonia anion exchange membrane fuel cells (DA-AEMFCs) have drawn great attention recently with the recognition that liquid ammonia (NH3), as a carbon-free hydrogen storage medium, is easy to store, transport, and distribute. However, its practical application is significantly limited by the anodic ammonia oxidation reaction (AOR), which not only is kinetically sluggish, but also suffers from competitive adsorption of oxidizing agent, OH–. Herein, we tackle the above challenges simultaneously by alloying the highly active platinum with electron-deficient tungsten. The W sites would preferentially adsorb OH to serve as the reservoir and supply for the dehydrogenation of NH3. The Pt sites are thus liberated and free for the targeting adsorption of NH3. Moreover, density functional theory calculations suggest that, with the pre-adsorption of OH, the d band center of PtW alloy experiences a positive shift toward the Fermi level, which would contribute to stronger adsorption of the reaction intermediates and thus benefit the whole AOR process. As expected, the synthesized alloy with the optimum ratio exhibits a low onset potential of 0.46 V versus reversible hydrogen electrode and a large peak current density of 11.70 mA cm−2. When subjected to practical application, the DA-AEMFCs assembled with such electrocatalyst deliver an excellent peak power density of 22.47 mW cm−2, indicating its potential feasibility in the next-generation energy devices. Electrocatalysis Ammonia oxidation reaction PtW alloy Competitive adsorption Direct ammonia fuel cells Jiang, Yuzhuo verfasserin aut Wang, Mengfan verfasserin aut Zhou, Xi verfasserin aut Shen, Xiaowei verfasserin aut Cao, Yufeng verfasserin aut Yan, Chenglin verfasserin aut Qian, Tao verfasserin aut Enthalten in The chemical engineering journal Amsterdam : Elsevier, 1997 475 Online-Ressource (DE-627)320500322 (DE-600)2012137-4 (DE-576)098330152 1873-3212 nnns volume:475 GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2088 GBV_ILN_2106 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4242 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 58.10 Verfahrenstechnik: Allgemeines VZ AR 475
language	English
source	Enthalten in The chemical engineering journal 475 volume:475
sourceStr	Enthalten in The chemical engineering journal 475 volume:475
format_phy_str_mv	Article
bklname	Verfahrenstechnik: Allgemeines
institution	findex.gbv.de
topic_facet	Electrocatalysis Ammonia oxidation reaction PtW alloy Competitive adsorption Direct ammonia fuel cells
dewey-raw	660
isfreeaccess_bool	false
container_title	The chemical engineering journal
authorswithroles_txt_mv	Huan, Yunfei @@aut@@ Jiang, Yuzhuo @@aut@@ Wang, Mengfan @@aut@@ Zhou, Xi @@aut@@ Shen, Xiaowei @@aut@@ Cao, Yufeng @@aut@@ Yan, Chenglin @@aut@@ Qian, Tao @@aut@@
publishDateDaySort_date	2023-01-01T00:00:00Z
hierarchy_top_id	320500322
dewey-sort	3660
id	ELV065302710
language_de	englisch
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author	Huan, Yunfei
spellingShingle	Huan, Yunfei ddc 660 bkl 58.10 misc Electrocatalysis misc Ammonia oxidation reaction misc PtW alloy misc Competitive adsorption misc Direct ammonia fuel cells Enhanced alkaline ammonia oxidation reaction activity using PtW alloy catalysts with tungsten as built-in competitor reservoir
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topic_title	660 VZ 58.10 bkl Enhanced alkaline ammonia oxidation reaction activity using PtW alloy catalysts with tungsten as built-in competitor reservoir Electrocatalysis Ammonia oxidation reaction PtW alloy Competitive adsorption Direct ammonia fuel cells
topic	ddc 660 bkl 58.10 misc Electrocatalysis misc Ammonia oxidation reaction misc PtW alloy misc Competitive adsorption misc Direct ammonia fuel cells
topic_unstemmed	ddc 660 bkl 58.10 misc Electrocatalysis misc Ammonia oxidation reaction misc PtW alloy misc Competitive adsorption misc Direct ammonia fuel cells
topic_browse	ddc 660 bkl 58.10 misc Electrocatalysis misc Ammonia oxidation reaction misc PtW alloy misc Competitive adsorption misc Direct ammonia fuel cells
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title	Enhanced alkaline ammonia oxidation reaction activity using PtW alloy catalysts with tungsten as built-in competitor reservoir
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title_full	Enhanced alkaline ammonia oxidation reaction activity using PtW alloy catalysts with tungsten as built-in competitor reservoir
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author_browse	Huan, Yunfei Jiang, Yuzhuo Wang, Mengfan Zhou, Xi Shen, Xiaowei Cao, Yufeng Yan, Chenglin Qian, Tao
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doi_str_mv	10.1016/j.cej.2023.146027
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title_sort	enhanced alkaline ammonia oxidation reaction activity using ptw alloy catalysts with tungsten as built-in competitor reservoir
title_auth	Enhanced alkaline ammonia oxidation reaction activity using PtW alloy catalysts with tungsten as built-in competitor reservoir
abstract	Direct ammonia anion exchange membrane fuel cells (DA-AEMFCs) have drawn great attention recently with the recognition that liquid ammonia (NH3), as a carbon-free hydrogen storage medium, is easy to store, transport, and distribute. However, its practical application is significantly limited by the anodic ammonia oxidation reaction (AOR), which not only is kinetically sluggish, but also suffers from competitive adsorption of oxidizing agent, OH–. Herein, we tackle the above challenges simultaneously by alloying the highly active platinum with electron-deficient tungsten. The W sites would preferentially adsorb OH to serve as the reservoir and supply for the dehydrogenation of NH3. The Pt sites are thus liberated and free for the targeting adsorption of NH3. Moreover, density functional theory calculations suggest that, with the pre-adsorption of OH, the d band center of PtW alloy experiences a positive shift toward the Fermi level, which would contribute to stronger adsorption of the reaction intermediates and thus benefit the whole AOR process. As expected, the synthesized alloy with the optimum ratio exhibits a low onset potential of 0.46 V versus reversible hydrogen electrode and a large peak current density of 11.70 mA cm−2. When subjected to practical application, the DA-AEMFCs assembled with such electrocatalyst deliver an excellent peak power density of 22.47 mW cm−2, indicating its potential feasibility in the next-generation energy devices.
abstractGer	Direct ammonia anion exchange membrane fuel cells (DA-AEMFCs) have drawn great attention recently with the recognition that liquid ammonia (NH3), as a carbon-free hydrogen storage medium, is easy to store, transport, and distribute. However, its practical application is significantly limited by the anodic ammonia oxidation reaction (AOR), which not only is kinetically sluggish, but also suffers from competitive adsorption of oxidizing agent, OH–. Herein, we tackle the above challenges simultaneously by alloying the highly active platinum with electron-deficient tungsten. The W sites would preferentially adsorb OH to serve as the reservoir and supply for the dehydrogenation of NH3. The Pt sites are thus liberated and free for the targeting adsorption of NH3. Moreover, density functional theory calculations suggest that, with the pre-adsorption of OH, the d band center of PtW alloy experiences a positive shift toward the Fermi level, which would contribute to stronger adsorption of the reaction intermediates and thus benefit the whole AOR process. As expected, the synthesized alloy with the optimum ratio exhibits a low onset potential of 0.46 V versus reversible hydrogen electrode and a large peak current density of 11.70 mA cm−2. When subjected to practical application, the DA-AEMFCs assembled with such electrocatalyst deliver an excellent peak power density of 22.47 mW cm−2, indicating its potential feasibility in the next-generation energy devices.
abstract_unstemmed	Direct ammonia anion exchange membrane fuel cells (DA-AEMFCs) have drawn great attention recently with the recognition that liquid ammonia (NH3), as a carbon-free hydrogen storage medium, is easy to store, transport, and distribute. However, its practical application is significantly limited by the anodic ammonia oxidation reaction (AOR), which not only is kinetically sluggish, but also suffers from competitive adsorption of oxidizing agent, OH–. Herein, we tackle the above challenges simultaneously by alloying the highly active platinum with electron-deficient tungsten. The W sites would preferentially adsorb OH to serve as the reservoir and supply for the dehydrogenation of NH3. The Pt sites are thus liberated and free for the targeting adsorption of NH3. Moreover, density functional theory calculations suggest that, with the pre-adsorption of OH, the d band center of PtW alloy experiences a positive shift toward the Fermi level, which would contribute to stronger adsorption of the reaction intermediates and thus benefit the whole AOR process. As expected, the synthesized alloy with the optimum ratio exhibits a low onset potential of 0.46 V versus reversible hydrogen electrode and a large peak current density of 11.70 mA cm−2. When subjected to practical application, the DA-AEMFCs assembled with such electrocatalyst deliver an excellent peak power density of 22.47 mW cm−2, indicating its potential feasibility in the next-generation energy devices.
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title_short	Enhanced alkaline ammonia oxidation reaction activity using PtW alloy catalysts with tungsten as built-in competitor reservoir
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author2	Jiang, Yuzhuo Wang, Mengfan Zhou, Xi Shen, Xiaowei Cao, Yufeng Yan, Chenglin Qian, Tao
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doi_str	10.1016/j.cej.2023.146027
up_date	2024-07-06T22:33:23.486Z
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Enhanced alkaline ammonia oxidation reaction activity using PtW alloy catalysts with tungsten as built-in competitor reservoir

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