期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 606, 期 -, 页码 1662-1672出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2021.08.174
关键词
Water electrolysis; Bifunctional electrocatalyst; Molybdenum oxide; FeCoCu alloy; Hydrogen evolution reaction; Oxygen evolution reaction
资金
- NSFC [51802084]
- Special Project for Fundamental Research in University of Henan Province [20ZX005]
- Natural Science Fund of Henan Province [212300410363]
- 111 Project [D17007]
- Henan Center for Outstanding Oversea Scientists [GZS2018003]
A MoOx-FeCoCu alloy catalyst was designed for efficient HER and OER, showing enhanced efficiency and durability, suitable for water electrolyzers with low driving voltage. The study provides a feasible approach for designing efficient bifunctional catalysts for water electrolysis through POM-mediated co-assembly and calcination treatment.
Efficient and durable non-precious catalyst for both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is pivotal for practical water electrolysis toward clean hydrogen fuel. Herein, a molybdenum oxide-FeCoCu alloy hybrid (MoOx-FeCoCu) catalyst was designed by polyoxometallate (POM) molecular cluster mediated solvothermal alcoholysis and ammonolysis of metal salts followed by pyrolytic reduction treatment. The HER efficiency is substantially enhanced by the ternary alloy component, which is more close to the benchmark Pt/C catalyst, and the HER catalytic stability is also superior to Pt/C catalyst. Moreover, the MoOx-FeCoCu demonstrates high catalytic efficiency and rather good durability for OER. Benefitted by the bifunctional catalytic behaviors for HER and OER, the symmetric water electrolyzer based on the MoOx-FeCoCu electrode requires a low driving voltage of 1.69 V to deliver a response current density of 10 mA cm(-2), which is comparable to that based on the benchmark Pt/C HER cathode and RuO2 OER anode. The current work offers a feasible way to design efficient bifunctional catalyst for water electrolysis via POM mediated co-assembly and calcination treatment. (C) 2021 Elsevier Inc. All rights reserved.
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