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Title: Cobalt tungsten phosphide with tunable W-doping as highly efficient electrocatalysts for hydrogen evolution reaction
Authors: Zhang, Bowei
Li, Chaojiang
Hu, Jun
Peng, Dongdong
Huang, Kang
Wu, Junsheng
Chen, Zhong
Huang, Yizhong
Keywords: Engineering::Materials
Issue Date: 2021
Source: Zhang, B., Li, C., Hu, J., Peng, D., Huang, K., Wu, J., Chen, Z. & Huang, Y. (2021). Cobalt tungsten phosphide with tunable W-doping as highly efficient electrocatalysts for hydrogen evolution reaction. Nano Research, 14(11), 4073-4078.
Project: M4011528 
Journal: Nano Research 
Abstract: It has been of interest in seeking electrocatalysts that could exercise equally high-efficient and durable hydrogen evolution upon nonselective electrolytes in both acidic and alkaline environments. Herein, we report a facile strategy to fabricate cobalt tungsten phosphides (CoxW2−xP2/C) hollow polyhedrons with tunable composition based on metal-organic frameworks (MOFs) template method. By the deliberate control of W doping, the synthesized catalyst with the composition of Co0.9W1.1P2/C is found to be able to achieve a current density of 10 mA·cm−2 at overpotentials of 35 and 54 mV in acidic and alkaline media, respectively. This combined electrochemical property stands atop the state-of-the-art electrocatalyst counterparts. To unveil the peculiar behavior of the structure, density functional theory (DFT) calculation was implemented and reveals that the surface W-doping facilitates the optimization of hydrogen absorption free energy (ΔGH*) as well as the thermodynamic and kinetics barriers for water dissociation, which is coupled with the hollow structure of Co-W phosphides, leading to the prominent HER catalytic performance.
ISSN: 1998-0124
DOI: 10.1007/s12274-021-3342-y
Schools: School of Materials Science and Engineering 
Rights: © 2021 Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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