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Grafting Cobalt Diselenide on Defective Graphene for Enhanced Oxygen Evolution Reaction
Cobalt diselenide (CoSe(2)) has been demonstrated to be an efficient and economic electrocatalyst for oxygen evolution reaction (OER) both experimentally and theoretically. However, the catalytic performance of up-to-now reported CoSe(2)-based OER catalysts is still far below commercial expectation....
Autores principales: | , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Elsevier
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6154397/ https://www.ncbi.nlm.nih.gov/pubmed/30267676 http://dx.doi.org/10.1016/j.isci.2018.08.013 |
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author | Wang, Xin Zhuang, Linzhou He, Tianwei Jia, Yi Zhang, Longzhou Yan, Xuecheng Gao, Minrui Du, Aijun Zhu, Zhonghua Yao, Xiangdong Yu, Shu-Hong |
author_facet | Wang, Xin Zhuang, Linzhou He, Tianwei Jia, Yi Zhang, Longzhou Yan, Xuecheng Gao, Minrui Du, Aijun Zhu, Zhonghua Yao, Xiangdong Yu, Shu-Hong |
author_sort | Wang, Xin |
collection | PubMed |
description | Cobalt diselenide (CoSe(2)) has been demonstrated to be an efficient and economic electrocatalyst for oxygen evolution reaction (OER) both experimentally and theoretically. However, the catalytic performance of up-to-now reported CoSe(2)-based OER catalysts is still far below commercial expectation. Herein, we report a hybrid catalyst consisting of CoSe(2) nanosheets grafted on defective graphene (DG). This catalyst exhibits a largely enhanced OER activity and robust stability in alkaline solution (overpotential at 10 mA cm(−2): 270 mV; Tafel plots: 64 mV dec(−1)). Both experimental evidence and density functional theory calculations reveal that the outstanding OER performance of this hybrid catalyst can be attributed to the synergetic effect of exposed cobalt atoms and carbon defects (electron transfer from CoSe(2) layer to defect sites at DG). Our results suggest a promising way for the development of highly efficient and low-cost OER catalysts based on transition metal dichalcogenides. |
format | Online Article Text |
id | pubmed-6154397 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | Elsevier |
record_format | MEDLINE/PubMed |
spelling | pubmed-61543972018-09-26 Grafting Cobalt Diselenide on Defective Graphene for Enhanced Oxygen Evolution Reaction Wang, Xin Zhuang, Linzhou He, Tianwei Jia, Yi Zhang, Longzhou Yan, Xuecheng Gao, Minrui Du, Aijun Zhu, Zhonghua Yao, Xiangdong Yu, Shu-Hong iScience Article Cobalt diselenide (CoSe(2)) has been demonstrated to be an efficient and economic electrocatalyst for oxygen evolution reaction (OER) both experimentally and theoretically. However, the catalytic performance of up-to-now reported CoSe(2)-based OER catalysts is still far below commercial expectation. Herein, we report a hybrid catalyst consisting of CoSe(2) nanosheets grafted on defective graphene (DG). This catalyst exhibits a largely enhanced OER activity and robust stability in alkaline solution (overpotential at 10 mA cm(−2): 270 mV; Tafel plots: 64 mV dec(−1)). Both experimental evidence and density functional theory calculations reveal that the outstanding OER performance of this hybrid catalyst can be attributed to the synergetic effect of exposed cobalt atoms and carbon defects (electron transfer from CoSe(2) layer to defect sites at DG). Our results suggest a promising way for the development of highly efficient and low-cost OER catalysts based on transition metal dichalcogenides. Elsevier 2018-08-16 /pmc/articles/PMC6154397/ /pubmed/30267676 http://dx.doi.org/10.1016/j.isci.2018.08.013 Text en © 2018 The Authors http://creativecommons.org/licenses/by-nc-nd/4.0/ This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). |
spellingShingle | Article Wang, Xin Zhuang, Linzhou He, Tianwei Jia, Yi Zhang, Longzhou Yan, Xuecheng Gao, Minrui Du, Aijun Zhu, Zhonghua Yao, Xiangdong Yu, Shu-Hong Grafting Cobalt Diselenide on Defective Graphene for Enhanced Oxygen Evolution Reaction |
title | Grafting Cobalt Diselenide on Defective Graphene for Enhanced Oxygen Evolution Reaction |
title_full | Grafting Cobalt Diselenide on Defective Graphene for Enhanced Oxygen Evolution Reaction |
title_fullStr | Grafting Cobalt Diselenide on Defective Graphene for Enhanced Oxygen Evolution Reaction |
title_full_unstemmed | Grafting Cobalt Diselenide on Defective Graphene for Enhanced Oxygen Evolution Reaction |
title_short | Grafting Cobalt Diselenide on Defective Graphene for Enhanced Oxygen Evolution Reaction |
title_sort | grafting cobalt diselenide on defective graphene for enhanced oxygen evolution reaction |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6154397/ https://www.ncbi.nlm.nih.gov/pubmed/30267676 http://dx.doi.org/10.1016/j.isci.2018.08.013 |
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