Fe2+ /Fe3+ Cycling for Coupling Self-Powered Hydrogen Evolution and Preparation of Electrode Catalysts

Chang Chen; Zhengqian Fu; Fenggang Qi; Yafeng Chen; Ge Meng; Ziwei Chang; Fantao Kong; Libo Zhu; Han Tian; Haitao Huang; Xiangzhi Cui; Jianlin Shi

doi:10.1002/anie.202207226

Fe²⁺ /Fe³⁺ Cycling for Coupling Self-Powered Hydrogen Evolution and Preparation of Electrode Catalysts

Angew Chem Int Ed Engl. 2022 Aug 8;61(32):e202207226. doi: 10.1002/anie.202207226. Epub 2022 Jun 23.

Authors

Chang Chen^{1

2}, Zhengqian Fu¹, Fenggang Qi^{1

2}, Yafeng Chen³, Ge Meng^{1

2}, Ziwei Chang¹, Fantao Kong¹, Libo Zhu^{1

2}, Han Tian¹, Haitao Huang⁴, Xiangzhi Cui^{1

2

5}, Jianlin Shi^{1

2}

Affiliations

¹ State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, P.R. China.
² Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, P.R. China.
³ Beijing Advanced Innovation Center for Materials Genome Engineering, Collaborative Innovation Center of Steel Technology, University of Science and Technology Beijing, Beijing, 100083, P.R. China.
⁴ Department of Applied Physics, Hong Kong Polytechnic University, 11 Yucai Road, Kowloon, Hongkong, China.
⁵ School of Chemistry and Materials Science, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou, 310024, P.R. China.

PMID: 35638129
DOI: 10.1002/anie.202207226

Abstract

A novel Zn-Fe flow battery featuring an Fe³⁺ reduction reaction (Fe³⁺ RR)-coupled zinc oxidation, and an Fe²⁺ oxidation reaction (Fe²⁺ OR)-coupled hydrogen evolution reaction (HER) system as well, was established. This battery is capable of driving two Fe²⁺ OR-coupled HER systems in series based on the above Fe²⁺ /Fe³⁺ cycling, for efficient self-powered hydrogen evolution. Meanwhile, this Fe²⁺ /Fe³⁺ cycling enables the preparation of a multifunctional catalyst, Pt-3@SXNS (siloxene nanosheet), by the Fe²⁺ OR-promoted dispersion of Pt nanoparticles on SXNS; alternatively, this support could be obtained by Fe³⁺ RR-assisted exfoliation using Fe³⁺ from the anolyte of Fe²⁺ OR-coupled HER. The Pt-3@SXNS catalyst exhibits excellent catalytic activities toward Fe³⁺ RR in the Zn-Fe flow battery, HER, and Fe²⁺ OR in the electrolyzer, which is attributed to the strong electronic interaction between Pt and Si. This work offers a new strategy for energy storage and low-cost hydrogen production from acidic wastewater.

Keywords: Fe2+/Fe3+; Hydrogen Spillover; Water Splitting; Zn−Fe Flow Batteries.

Abstract

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