Hierarchical NiMoP2-Ni2P with amorphous interface as superior bifunctional electrocatalysts for overall water splitting

Gaoqi Tian ¹Songrui Wei ²Zhangtao Guo ¹Shiwei Wu ¹Zhongli Chen ¹Fuming Xu ²Yang Cao ³Zheng Liu ¹Jieqiong Wang ¹Lei Ding ¹Jinchun Tu ¹Hao Zeng⁴

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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. College of Physics and Optoelectronic Engineering,Shenzhen University,Shenzhen 518080,China
3. State Key Laboratory of Marine Resource Utilization in South China Sea,School of Materials Science and Engineering,Hainan University,Haikou 570228,China;Qiongtai Normal University,Haikou 571127,China
4. Department of Physics,SUNY-Buffalo,Buffalo,NY,14260,USA
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Abstract

Producing highly efficient bifunctional catalyst for the generation of hydrogen and oxygen through overall water splitting is an emerging direction in electrocatalysis,Herein,a dandelion-like hierarchi-cal NiMoP2-Ni2P(nanowire/nanoparticle)heterostructure was synthesized for efficient electrochemical water splitting.The NiMoP2-Ni2P heterostructures grown on carbon cloth as a freestanding integrated electrode exhibited excellent oxygen evolution reaction(OER)activity and hydrogen evolution reaction(HER)activities with low overpotentials(258 mV and 53 mV to reach 10 mA cm-2 for the OER and HER,respectively),and small Tafel slope(45 mV dec-1 and 58 mV dec-1 for the OER and HER,respectively).Moreover,the NiMoP2-Ni2 P heterostructure can act as both anode and cathode catalysts for overall water splitting with low overall potential of 1.48 V at 10 mA cm-2.Density functional theory(DFT)combined with structural probes suggests that the amorphous heterogeneous interfaces play an essential role in enhanced catalytic performance.

Key words

Bimetallic phosphide/Amorphous interface/Adsorption energy/Hydrogen evolution reaction/Oxygen evolution reaction/Water splitting

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基金项目

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

参考文献量67

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