Volume 61, Issue 11 e202113362
Research Article

Steering the Glycerol Electro-Reforming Selectivity via Cation–Intermediate Interactions

Jianxiang Wu

Jianxiang Wu

Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai, 200438 P. R. China

These authors contributed equally to this work.

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Jili Li

Jili Li

Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai, 200438 P. R. China

These authors contributed equally to this work.

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Yefei Li

Corresponding Author

Yefei Li

Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai, 200438 P. R. China

Key Laboratory of Computational Physical Science, Fudan University, Shanghai, 200438 P. R. China

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Xian-Yin Ma

Xian-Yin Ma

Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai, 200438 P. R. China

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Wei-Yi Zhang

Wei-Yi Zhang

Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai, 200438 P. R. China

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Yaming Hao

Yaming Hao

Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai, 200438 P. R. China

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Wen-Bin Cai

Wen-Bin Cai

Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai, 200438 P. R. China

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Zhi-Pan Liu

Zhi-Pan Liu

Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai, 200438 P. R. China

Key Laboratory of Computational Physical Science, Fudan University, Shanghai, 200438 P. R. China

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Ming Gong

Corresponding Author

Ming Gong

Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai, 200438 P. R. China

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First published: 26 December 2021
Citations: 87

Graphical Abstract

Glycerol oxidation selectivity can be efficiently steered via cation–intermediate interactions, resulting in highly selective glycerol electro-reforming into hydrogen and formate. This work emphasizes the significance of engineering the microenvironment at the electrode–electrolyte interface for efficient electrochemical processes.

Abstract

Electro-reforming of renewable biomass resources is an alternative technology for sustainable pure H2 production. Herein, we discovered an unconventional cation effect on the concurrent formate and H2 production via glycerol electro-reforming. In stark contrast to the cation effect via forming double layers in cathodic reactions, residual cations at the anode were discovered to interact with the glycerol oxidation intermediates to steer its product selectivity. Through a combination of product analysis, transient kinetics, crown ether trapping experiments, in situ IRRAS and DFT calculations, the aldehyde intermediates were discovered to be stabilized by the Li+ cations to favor the non-oxidative C−C cleavage for formate production. The maximal formate efficiency could reach 81.3 % under ≈60 mA cm−2 in LiOH. This work emphasizes the significance of engineering the microenvironment at the electrode–electrolyte interface for efficient electrolytic processes.

Conflict of interest

The authors declare no conflict of interest.

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