Phosphorus substitution into Co3S4 nanoneedle arrays for efficient hydrogen evolution catalysis

Zhangtao Guo ¹Gaoqi Tian ¹Lin Liu ¹Binyu Zhang ¹Qiang Wu ²Yang Cao ³Jinchun Tu ¹Lei Ding ¹Xiaolin Zhang⁴

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作者信息

1. State Key Laboratory of Marine Resource Utilization in South China Sea,School of Materials Science and Engineering,Hainan University,Haikou 570228,China
2. School of Tropical Medicine and Laboratory Medicine,MOE Key Laboratory of Emergency and Trauma,Hainan Medical University,Haikou 571199,China
3. State Key Laboratory of Marine Resource Utilization in South China Sea,School of Materials Science and Engineering,Hainan University,Haikou 570228,China;Key Laboratory Of Child Cognition &Behavior Development Of Hainan Province,Qiongtai Normal University,Haikou 571127,China
4. Key Laboratory Of Child Cognition &Behavior Development Of Hainan Province,Qiongtai Normal University,Haikou 571127,China
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Abstract

Transition-metal based hybrids with excellent stability and activity are favorable candidates for hydrogen evolution reaction (HER).The development of typical Co3S4 has recently received considerable atten-tion due to the multiple valences of the spinel-structured compound.However,the in-depth effect of the dopants on the HER performance of Co3S4 has not been systematically clarified.Here,we report a sequential synthesis of a spinel-structured cobalt phosphosulfate nanoneedle arrays grown on carbon cloth (namely,P-Co3S4/CC).Results indicate that P-Co3S4/CC exhibits high electrocatalytic performance for HER with a low overpotential of 65 mV to drive10 mA cm-2,a small Tafel slope of 76.6 mV per decade,and great long-term stability for 25 h at various current densities in alkaline electrolyte.The first-principle calculation result reveals that the phosphorous doping work at Co3S4 enhances the HER performance sig-nificantly because the tetrahedral Co2+ active sites nearest the P atoms more easily weaken the H-O bond to form intermediates.The experiment result characterization and theoretical calculations further show that the introduction of P atom not only offers more active sites but also improves the electrical con-ductivity in an alkaline electrolyte solution.Consequently,the identification of active species provides feasible guidance for the further design of high-performance spinel-structured catalysts.

Key words

P-Co3S4/CC/P substitution/Electronic conductivity/HER

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基金项目

Chinese Academy of Medical Sciences()

Finance Science and Technology Project of Hainan Province(ZDYF2019161)

Finance Science and Technology Project of Hainan Province(2019RC221)

National Natural Science Foundation of China(51762012)

National Natural Science Foundation of China(81860373)

National Natural Science Foundation of China(51862006)

Central Government for Local Science and Technology(ZY2019HN0909)

Key Laboratory and Trauma (Hainan Medical University)()

Ministry of Education(KLET-201910)

出版年

2021

材料科学技术(英文版)

中国金属学会中国材料研究学会中国科学院金属研究所

材料科学技术(英文版)

CSTPCDCSCDSCI

影响因子：0.657

ISSN：1005-0302

被引量1

参考文献量53

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