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Monometallic interphasic synergy via nano-hetero-interfacing for hydrogen evolution in alkaline electrolytes

Electrocatalytic synergy is a functional yet underrated concept in electrocatalysis. Often, it materializes as intermetallic interaction between different metals. We demonstrate interphasic synergy in monometallic structures is as much effective. An interphasic synergy between Ni(OH)(2) and Ni-N/Ni-...

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Autores principales: Dastafkan, Kamran, Shen, Xiangjian, Hocking, Rosalie K., Meyer, Quentin, Zhao, Chuan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9892594/
https://www.ncbi.nlm.nih.gov/pubmed/36725848
http://dx.doi.org/10.1038/s41467-023-36100-3
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author Dastafkan, Kamran
Shen, Xiangjian
Hocking, Rosalie K.
Meyer, Quentin
Zhao, Chuan
author_facet Dastafkan, Kamran
Shen, Xiangjian
Hocking, Rosalie K.
Meyer, Quentin
Zhao, Chuan
author_sort Dastafkan, Kamran
collection PubMed
description Electrocatalytic synergy is a functional yet underrated concept in electrocatalysis. Often, it materializes as intermetallic interaction between different metals. We demonstrate interphasic synergy in monometallic structures is as much effective. An interphasic synergy between Ni(OH)(2) and Ni-N/Ni-C phases is reported for alkaline hydrogen evolution reaction that lowers the energy barriers for hydrogen adsorption-desorption and facilitates that of hydroxyl intermediates. This makes ready-to-serve Ni active sites and allocates a large amount of Ni d-states at Fermi level to promote charge redistribution from Ni(OH)(2) to Ni-N/Ni-C and the co-adsorption of H(ads) and OH(ads) intermediates on Ni-N/Ni-C moieties. As a result, a Ni(OH)(2)@Ni-N/Ni-C hetero-hierarchical nanostructure is developed, lowering the overpotentials to deliver −10 and −100 mA cm(−2) in alkaline media by 102 and 113 mV, respectively, compared to monophasic Ni(OH)(2) catalyst. This study unveils the interphasic synergy as an effective strategy to design monometallic electrocatalysts for water splitting and other energy applications.
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spelling pubmed-98925942023-02-03 Monometallic interphasic synergy via nano-hetero-interfacing for hydrogen evolution in alkaline electrolytes Dastafkan, Kamran Shen, Xiangjian Hocking, Rosalie K. Meyer, Quentin Zhao, Chuan Nat Commun Article Electrocatalytic synergy is a functional yet underrated concept in electrocatalysis. Often, it materializes as intermetallic interaction between different metals. We demonstrate interphasic synergy in monometallic structures is as much effective. An interphasic synergy between Ni(OH)(2) and Ni-N/Ni-C phases is reported for alkaline hydrogen evolution reaction that lowers the energy barriers for hydrogen adsorption-desorption and facilitates that of hydroxyl intermediates. This makes ready-to-serve Ni active sites and allocates a large amount of Ni d-states at Fermi level to promote charge redistribution from Ni(OH)(2) to Ni-N/Ni-C and the co-adsorption of H(ads) and OH(ads) intermediates on Ni-N/Ni-C moieties. As a result, a Ni(OH)(2)@Ni-N/Ni-C hetero-hierarchical nanostructure is developed, lowering the overpotentials to deliver −10 and −100 mA cm(−2) in alkaline media by 102 and 113 mV, respectively, compared to monophasic Ni(OH)(2) catalyst. This study unveils the interphasic synergy as an effective strategy to design monometallic electrocatalysts for water splitting and other energy applications. Nature Publishing Group UK 2023-02-01 /pmc/articles/PMC9892594/ /pubmed/36725848 http://dx.doi.org/10.1038/s41467-023-36100-3 Text en © The Author(s) 2023 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Dastafkan, Kamran
Shen, Xiangjian
Hocking, Rosalie K.
Meyer, Quentin
Zhao, Chuan
Monometallic interphasic synergy via nano-hetero-interfacing for hydrogen evolution in alkaline electrolytes
title Monometallic interphasic synergy via nano-hetero-interfacing for hydrogen evolution in alkaline electrolytes
title_full Monometallic interphasic synergy via nano-hetero-interfacing for hydrogen evolution in alkaline electrolytes
title_fullStr Monometallic interphasic synergy via nano-hetero-interfacing for hydrogen evolution in alkaline electrolytes
title_full_unstemmed Monometallic interphasic synergy via nano-hetero-interfacing for hydrogen evolution in alkaline electrolytes
title_short Monometallic interphasic synergy via nano-hetero-interfacing for hydrogen evolution in alkaline electrolytes
title_sort monometallic interphasic synergy via nano-hetero-interfacing for hydrogen evolution in alkaline electrolytes
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9892594/
https://www.ncbi.nlm.nih.gov/pubmed/36725848
http://dx.doi.org/10.1038/s41467-023-36100-3
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