A Combined experimental and theoretical study of the accelerated hydrogen evolution kinetics over wide pH range on porous transition metal doped tungsten phosphide electrocatalysts

被引:68
|
作者
Wang, Jiajun [1 ,3 ]
Chang, Kuan [2 ]
Sun, Zeyu [1 ]
Lee, Ji Hoon [3 ]
Tackett, Brian M. [3 ]
Zhang, Cheng [4 ]
Chen, Jingguang G. [3 ]
Liu, Chang-Jun [1 ]
机构
[1] Tianjin Univ, Sch Chem Engn & Technol, Collaborat Innovat Ctr Chem Sci & Engn, Tianjin 300072, Peoples R China
[2] Tsinghua Univ, Dept Chem Engn, Beijing 100084, Peoples R China
[3] Columbia Univ, Dept Chem Engn, 500 W 120th St, New York, NY 10027 USA
[4] Long Isl Univ Post, Dept Chem, Brookville, NY 11548 USA
基金
中国国家自然科学基金;
关键词
Hydrogen evolution reaction; Water dissociation; Density functional theory; Transition metal doping; Electrochemistry; HIGH-PERFORMANCE ELECTROCATALYSIS; HIGHLY EFFICIENT; CARBON; NANOPARTICLES; NANOWIRE; NANOSHEETS; CATALYSTS; CATHODE; HYBRID; ARRAYS;
D O I
10.1016/j.apcatb.2019.03.065
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Modifying the nanostructures and chemical compositions provides an opportunity of developing the effective and inexpensive hydrogen evolution reaction (HER) electrocatalysts. Herein, porous transition metal doped tungsten phosphide (M-WP, M=Mo, Co) catalysts have been developed as enhanced HER electrocatalysts in comparison with pristine WP. Owing to the incorporated transition metals, the as-prepared M-WP nanomaterials exhibit porous nanostructures, abundant active sites and reduced charge transfer resistances. Density functional theory (DFT) calculations further demonstrate that the Co dopant simultaneously facilitates the water dissociation step and optimizes the hydrogen adsorption free energy during the entire HER process. Consequently, the Co-WP catalyst shows efficient and stable HER performance over wide pH range. This work demonstrates how metal dopants promote the HER kinetics and develops the strategy for further designing non-precious metal based nanomaterials for energy conversion and electrocatalysis.
引用
收藏
页码:162 / 167
页数:6
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