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

• 作者: Gaoqi Tian Songrui Wei Zhangtao Guo Shiwei Wu Zhongli Chen Fuming Xu Yang Cao Zheng Liu Jieqiong Wang Lei Ding Jinchun Tu Hao Zeng
• 来源期刊: 材料科学技术（英文版）
• 年，卷（期）: 2021,（18）
• 页码范围: 108-116
• 页数: 9页
• 语种: 英文

摘要

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.