journal article·2021-05-25

Optimized MoP with Pseudo-Single-Atom Tungsten for Efficient Hydrogen Electrocatalysis

Changli Chen, Wenjia Luo, Haijing Li, Tao Hu, Yizhou Zhao, Zipeng Zhao, Xiaolong Sun, Huachao Zai, Yifei Qi, Menghao Wu, Yuanyuan Dong, Juncai Dong, Wenxing Chen, Xiaoxing Ke, Manling Sui, Liqiang Zhang, Qi Chen, Ziyu Wang, Enbo Zhu, Yujing Li, Yu Huang

Chemistry of Materials· Volume 33· Issue 10
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Abstract

The electrochemical hydrogen evolution reaction (HER) in alkaline medium is of great significance for the conversion of renewable energy into hydrogen fuel. Most catalysts exhibit limited HER performance in alkaline electrolytes due to the inefficient dissociation of water to initiate the Volmer reaction. Herein, we report the atomically dispersed tungsten (W)-optimized MoP nanoparticles on N,P-doped graphene oxide (W0.25Mo0.75P/PNC) that possesses high activity with impressively low overpotentials (η = 70 mV@10 mA cm–2, η = 49 mV@10 mA mgcat.–1) in alkaline medium. The catalyst features with the atomically isolated W atoms that can optimize the surface electronic structure by occupying the vacant Mo sites in the MoP lattice, corroborated by the X-ray absorption spectra, further leading to moderate hydrogen adsorption energy on the surface. The first-principles computation reveals that the atomically dispersed W atoms effectively reduce the water dissociation energy and facilitate the adsorption kinetics, leading to high activity. This work proposes an elegant design principle based on the pseudo-single-atom strategy to facilitate hydrogen electrocatalysis.
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Research context

OpenAlex topics: Electrocatalysts for Energy Conversion · Fuel Cells and Related Materials · Advanced battery technologies research

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications, Experimental Center of Advanced Materials, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, P. R. China

School of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, P. R. China

Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China

Institute of Microstructure and Property of Advanced Materials, Beijing University of Technology, Beijing 100124, P. R. China

Department of Materials Science and Engineering, University of California, Los Angeles, Los Angeles, California 90095, United States

The Institute of Technological Sciences, Wuhan University, Wuhan 430072, China

Clean Nano Energy Center, State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, China

Funding

Beijing Municipal Commission of Education · Natural Science Foundation of Beijing Municipality · Beijing Institute of Technology · National Natural Science Foundation of China

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