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Nanoscale Double‐Heterojunctional Electrocatalyst for Hydrogen Evolution

The active sites and charge/mass transfer properties in electrocatalysts play vital roles in kinetics and thermodynamics of electrocatalysis, and impose direct impacts on electrocatalytic performance, which cannot be achieved by a simplex structure. As a prototype, the authors propose a double‐heter...

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Autores principales: Feng, Yangyang, Guan, Yongxin, Zhou, Enbo, Zhang, Xiang, Wang, Yaobing
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9218783/
https://www.ncbi.nlm.nih.gov/pubmed/35466554
http://dx.doi.org/10.1002/advs.202201339
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author Feng, Yangyang
Guan, Yongxin
Zhou, Enbo
Zhang, Xiang
Wang, Yaobing
author_facet Feng, Yangyang
Guan, Yongxin
Zhou, Enbo
Zhang, Xiang
Wang, Yaobing
author_sort Feng, Yangyang
collection PubMed
description The active sites and charge/mass transfer properties in electrocatalysts play vital roles in kinetics and thermodynamics of electrocatalysis, and impose direct impacts on electrocatalytic performance, which cannot be achieved by a simplex structure. As a prototype, the authors propose a double‐heterojunctional nanostructure of NiS(2)/Ni(3)C@C containing NiS(2)/Ni(3)C and Ni(3)C/C heterojunctions as a general model to optimize the above issues and boost electrocatalytic performance. During the thermal reorganization, the in situ reaction between NiS(2) nanoparticles and carbon induces the formation of Ni(3)C between them and constructs tightly contacted two kinds of interfaces among the three components. The TEM and XPS reveal the intimately contacted three components and the as‐constructed interacted dual interfaces, further confirming the formation of a porous double‐heterojunctional nanostructure. Theoretical calculations uncover that the electron density redistribution occurs at Ni(3)C/C interface by spontaneous electron transfer from defected carbon to Ni(3)C and lower ΔG(H*) achieves at NiS(2)/Ni(3)C interface by the concentrated interfacial charge density, which favors the simultaneous realization of high catalytic activity and rapid charge/mass transfer. When applied for hydrogen evolution reaction (HER), the porous double‐heterojunctional NiS(2)/Ni(3)C@C exhibits excellent HER activity and durability among all pH values. Profoundly, this special double‐heterojunctional structure can provide a new model for high‐performance electrocatalysts and beyond.
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spelling pubmed-92187832022-06-29 Nanoscale Double‐Heterojunctional Electrocatalyst for Hydrogen Evolution Feng, Yangyang Guan, Yongxin Zhou, Enbo Zhang, Xiang Wang, Yaobing Adv Sci (Weinh) Research Articles The active sites and charge/mass transfer properties in electrocatalysts play vital roles in kinetics and thermodynamics of electrocatalysis, and impose direct impacts on electrocatalytic performance, which cannot be achieved by a simplex structure. As a prototype, the authors propose a double‐heterojunctional nanostructure of NiS(2)/Ni(3)C@C containing NiS(2)/Ni(3)C and Ni(3)C/C heterojunctions as a general model to optimize the above issues and boost electrocatalytic performance. During the thermal reorganization, the in situ reaction between NiS(2) nanoparticles and carbon induces the formation of Ni(3)C between them and constructs tightly contacted two kinds of interfaces among the three components. The TEM and XPS reveal the intimately contacted three components and the as‐constructed interacted dual interfaces, further confirming the formation of a porous double‐heterojunctional nanostructure. Theoretical calculations uncover that the electron density redistribution occurs at Ni(3)C/C interface by spontaneous electron transfer from defected carbon to Ni(3)C and lower ΔG(H*) achieves at NiS(2)/Ni(3)C interface by the concentrated interfacial charge density, which favors the simultaneous realization of high catalytic activity and rapid charge/mass transfer. When applied for hydrogen evolution reaction (HER), the porous double‐heterojunctional NiS(2)/Ni(3)C@C exhibits excellent HER activity and durability among all pH values. Profoundly, this special double‐heterojunctional structure can provide a new model for high‐performance electrocatalysts and beyond. John Wiley and Sons Inc. 2022-04-24 /pmc/articles/PMC9218783/ /pubmed/35466554 http://dx.doi.org/10.1002/advs.202201339 Text en © 2022 The Authors. Advanced Science published by Wiley‐VCH GmbH https://creativecommons.org/licenses/by/4.0/This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Articles
Feng, Yangyang
Guan, Yongxin
Zhou, Enbo
Zhang, Xiang
Wang, Yaobing
Nanoscale Double‐Heterojunctional Electrocatalyst for Hydrogen Evolution
title Nanoscale Double‐Heterojunctional Electrocatalyst for Hydrogen Evolution
title_full Nanoscale Double‐Heterojunctional Electrocatalyst for Hydrogen Evolution
title_fullStr Nanoscale Double‐Heterojunctional Electrocatalyst for Hydrogen Evolution
title_full_unstemmed Nanoscale Double‐Heterojunctional Electrocatalyst for Hydrogen Evolution
title_short Nanoscale Double‐Heterojunctional Electrocatalyst for Hydrogen Evolution
title_sort nanoscale double‐heterojunctional electrocatalyst for hydrogen evolution
topic Research Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9218783/
https://www.ncbi.nlm.nih.gov/pubmed/35466554
http://dx.doi.org/10.1002/advs.202201339
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