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Implanting Ni-O-VOx sites into Cu-doped Ni for low-overpotential alkaline hydrogen evolution

Nickel-based catalysts are most commonly used in industrial alkaline water electrolysis. However, it remains a great challenge to address the sluggish reaction kinetics and severe deactivation problems of hydrogen evolution reaction (HER). Here, we show a Cu-doped Ni catalyst implanted with Ni-O-VOx...

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Autores principales: Li, Yibing, Tan, Xin, Hocking, Rosalie K., Bo, Xin, Ren, Hangjuan, Johannessen, Bernt, Smith, Sean C., Zhao, Chuan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7264301/
https://www.ncbi.nlm.nih.gov/pubmed/32483179
http://dx.doi.org/10.1038/s41467-020-16554-5
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author Li, Yibing
Tan, Xin
Hocking, Rosalie K.
Bo, Xin
Ren, Hangjuan
Johannessen, Bernt
Smith, Sean C.
Zhao, Chuan
author_facet Li, Yibing
Tan, Xin
Hocking, Rosalie K.
Bo, Xin
Ren, Hangjuan
Johannessen, Bernt
Smith, Sean C.
Zhao, Chuan
author_sort Li, Yibing
collection PubMed
description Nickel-based catalysts are most commonly used in industrial alkaline water electrolysis. However, it remains a great challenge to address the sluggish reaction kinetics and severe deactivation problems of hydrogen evolution reaction (HER). Here, we show a Cu-doped Ni catalyst implanted with Ni-O-VOx sites (Ni(Cu)VOx) for alkaline HER. The optimal Ni(Cu)VOx electrode exhibits a near-zero onset overpotential and low overpotential of 21 mV to deliver –10 mA cm(−2), which is comparable to benchmark Pt/C catalyst. Evidence for the formation of Ni-O-VOx sites in Ni(Cu)VOx is established by systematic X-ray absorption spectroscopy studies. The VOx can cause a substantial dampening of Ni lattice and create an enlarged electrochemically active surface area. First-principles calculations support that the Ni-O-VOx sites are superactive and can promote the charge redistribution from Ni to VOx, which greatly weakens the H-adsorption and H(2) release free energy over Ni. This endows the Ni(Cu)VOx electrode high HER activity and long-term durability.
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spelling pubmed-72643012020-06-12 Implanting Ni-O-VOx sites into Cu-doped Ni for low-overpotential alkaline hydrogen evolution Li, Yibing Tan, Xin Hocking, Rosalie K. Bo, Xin Ren, Hangjuan Johannessen, Bernt Smith, Sean C. Zhao, Chuan Nat Commun Article Nickel-based catalysts are most commonly used in industrial alkaline water electrolysis. However, it remains a great challenge to address the sluggish reaction kinetics and severe deactivation problems of hydrogen evolution reaction (HER). Here, we show a Cu-doped Ni catalyst implanted with Ni-O-VOx sites (Ni(Cu)VOx) for alkaline HER. The optimal Ni(Cu)VOx electrode exhibits a near-zero onset overpotential and low overpotential of 21 mV to deliver –10 mA cm(−2), which is comparable to benchmark Pt/C catalyst. Evidence for the formation of Ni-O-VOx sites in Ni(Cu)VOx is established by systematic X-ray absorption spectroscopy studies. The VOx can cause a substantial dampening of Ni lattice and create an enlarged electrochemically active surface area. First-principles calculations support that the Ni-O-VOx sites are superactive and can promote the charge redistribution from Ni to VOx, which greatly weakens the H-adsorption and H(2) release free energy over Ni. This endows the Ni(Cu)VOx electrode high HER activity and long-term durability. Nature Publishing Group UK 2020-06-01 /pmc/articles/PMC7264301/ /pubmed/32483179 http://dx.doi.org/10.1038/s41467-020-16554-5 Text en © The Author(s) 2020 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/.
spellingShingle Article
Li, Yibing
Tan, Xin
Hocking, Rosalie K.
Bo, Xin
Ren, Hangjuan
Johannessen, Bernt
Smith, Sean C.
Zhao, Chuan
Implanting Ni-O-VOx sites into Cu-doped Ni for low-overpotential alkaline hydrogen evolution
title Implanting Ni-O-VOx sites into Cu-doped Ni for low-overpotential alkaline hydrogen evolution
title_full Implanting Ni-O-VOx sites into Cu-doped Ni for low-overpotential alkaline hydrogen evolution
title_fullStr Implanting Ni-O-VOx sites into Cu-doped Ni for low-overpotential alkaline hydrogen evolution
title_full_unstemmed Implanting Ni-O-VOx sites into Cu-doped Ni for low-overpotential alkaline hydrogen evolution
title_short Implanting Ni-O-VOx sites into Cu-doped Ni for low-overpotential alkaline hydrogen evolution
title_sort implanting ni-o-vox sites into cu-doped ni for low-overpotential alkaline hydrogen evolution
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7264301/
https://www.ncbi.nlm.nih.gov/pubmed/32483179
http://dx.doi.org/10.1038/s41467-020-16554-5
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