DataVXACS Applied Materials & InterfacesPaper
journal article·2021-11-17

Single-Atom Co Doped in Ultrathin WO3 Arrays for the Enhanced Hydrogen Evolution Reaction in a Wide pH Range

Luan Liu, Yongzhi Zhao, Yong Wang, Zili Zhang, Jia Liu, Tong Wu, Wanjun Qin, Sijia Liu, Baorui Jia, Haoyang Wu, Deyin Zhang, Xuanhui Qu, Kai Xi, Mingli Qin

ACS Applied Materials & Interfaces· Volume 13· Issue 45
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Source abstract

Abstract

Owing to the scarcity of Pt, low-cost, stable, and efficient nonprecious metal-based electrocatalysts that can be applied in a wide pH range for the hydrogen evolution reaction (HER) are urgently required. Herein, a highly efficient and robust HER catalyst that is applicable at all pH values is fabricated, containing isolated Co-single atomic sites anchored in the self-supported WO3 arrays grown on Cu foam. At a current density of 10 mA cm–2, the HER overpotentials are 117, 105, and 149 mV at pH values of 0, 7, and 14, respectively, which are significantly lower than those of the undoped WO3, suggesting superior electrocatalytic H2-evolution activity at all pH values. The catalyst also exhibits long-term stability over a wide pH range, particularly in an acidic medium over 24 h, owing to the excellent anticorrosion properties of WO3. Density functional theory calculations prove that the enhanced HER activity is attributed to the isolated Co sites because these optimize the adsorption energy of H* species on WO3. Moreover, the high electrical conductivity of Co-doped WO3 and the three-dimensional array structure supported on the porous metal support afford a catalyst with suitable HER kinetics to enhance the catalytic performance.
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Research context

Catalysis & surfaces

OpenAlex topics: Electrocatalysts for Energy Conversion · Advanced battery technologies research · Electrochemical Analysis and Applications

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

Affiliations

Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China

Department of Electrical Engineering, Zhengzhou University, Zhengzhou 450001, China

School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, China

Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, United States

Beijing Advanced Innovation Center for Materials Genome Engineering, University of Science and Technology Beijing, Beijing 100083, China

Department of Materials Science and Metallurgy, University of Cambridge, Cambridge CB3 0FS, U.K.

Funding

Key Research and Development Project of Hebei Province · USTB-NTUT Joint Research Program · the Natural Science Foundation Program of Beijing · the Postdoctor Research Foundation of Shunde Graduate School of University of Science and Technology Beijing · the National Natural Science Foundation Program of China · the Fundamental Research Funds for the Central Universities · the Scientific Research Foundation of Hunan Provincial Education Department

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