Статья

Mn Doping of CoP Nanosheets Array: An Efficient Electrocatalyst for Hydrogen Evolution Reaction with Enhanced Activity at All pH Values

Tingting LiuCollege of Chemistry, Sichuan University, Chengdu 610064, ChinaXiao MaCollege of Chemistry, Sichuan University, Chengdu 610064, ChinaDanni LiuCollege of Chemistry, Sichuan University, Chengdu 610064, ChinaShuai HaoCollege of Chemistry, Sichuan University, Chengdu 610064, ChinaGu DuChengdu Institute of Geology and Mineral Resources, Chengdu 610064, ChinaYongjun MaAnalytical and Test Center, Southwest University of Science and Technology, Mianyang 621010, ChinaAbdullah M. AsiriChemistry Department, King Abdulaziz University, Jeddah 21589, Saudi Arabia, andXuping SunCollege of Chemistry, Sichuan University, Chengdu 610064, ChinaLiang ChenNingbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China

2016en

ABI

Аннотация

Heteratom doping is a possible way to tune the hydrogen evolution reaction (HER) catalytic capability of electrocatalysts. In this work, we report the development of Mn-doped CoP (Mn–Co–P) nanosheets array on Ti mesh (Mn–Co–P/Ti) as an efficient 3D HER electrocatalyst with good stability at all pH values. Electrochemical tests demonstrate that Mn doping leads to enhanced catalytic activity of CoP. In 0.5 M H2SO4, this Mn–Co–P/Ti catalyst drives 10 mA cm–2 at an overpotential of 49 mV, which is 32 mV less than that for CoP/Ti. To achieve the same current density, it demands overpotentials of 76 and 86 mV in 1.0 M KOH and phosphate-buffered saline, respectively. The enhanced HER activity for Mn–Co–P can be attributed to its more thermo-neutral hydrogen adsorption free energy than CoP, which is supported by density functional theory calculations.

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Идентификаторы

DOI: 10.1021/acscatal.6b02849

Цитирования и источники

Цитирований: 2Использованных источников: 0

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