MnS-MnO heterogeneous nanocube@N,S-doped carbon as a highly efficient bifunctional water splitting electrocatalyst

Xue-Qian Wang ¹Xiang-Ying Ma ²Wang-Zhi Wu ¹Hui-Bing He ¹Nan-Nan Wang ¹Ren-Ji Zheng ³Shao-Jian Ma ¹Yan-Qiu Zhu ¹Pei-Kang Shen ¹Jin-Liang Zhu¹

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作者信息

1. School of Resources,Environment and Materials,State Key Laboratory of Featured Metal Materials and Life-Cycle Safety for Composite Structures,College of Chemistry and Chemical Engineering,Guangxi University,Nanning 530004,China
2. School of Resources,Environment and Materials,State Key Laboratory of Featured Metal Materials and Life-Cycle Safety for Composite Structures,College of Chemistry and Chemical Engineering,Guangxi University,Nanning 530004,China;School of Chemistry and Chemical Engineering,Guangxi Minzu University,Nanning 530006,China
3. School of Minerals Processing and Bioengineering,Central South University,Changsha 410083,China
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Abstract

A stable,efficient,and economical bifunctional electrolytic catalyst would be incredibly beneficial for the development of hydrogen production by electrocatalytic water splitting.In this study,we synthesized a novel MnS-MnO heterogeneous nanocube@N,S-doped carbon(MnS-MnO@NSC).MnS-MnO nanocubes possess rich hetero-geneous interfaces and plentiful catalytic active sites to promote electrochemical reactions,while the N,S-doped carbon shell possesses excellent conductivity and catalytic properties and protects the nanocubes.MnS-MnO@NSC exhibited excellent electrochemical properties as an effective bifunctional electrocatalyst for the hydrogen evolution reaction(HER)and oxygen evolution reaction(OER)in KOH solution.In the HER,the overpotential was as low as 124 mV at a current density of 10 mA·cm-2,while in the OER,it was only 340 mV at 100 mA·cm-2 under the same conditions.In addition,a MnS-MnO@NSC‖MnS-MnO@NSC electrolyzer exhibited almost comparable activity and higher steadiness than those exhibited by the state-of-the-art Pt/C‖RuO2/C system for full water splitting in KOH solution.

Key words

Manganese sulfide/Manganese oxide/Doped carbon/Heterogeneous nanocube/Water splitting

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基金项目

National Natural Science Foundation of China(51962002)

Natural Science Foundation of Guangxi(2022GXNSFAA035463)

出版年

2024

稀有金属(英文版)

中国有色金属学会

稀有金属(英文版)

CSTPCDCSCDEI

影响因子：0.801

ISSN：1001-0521

参考文献量51

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