Work

Surface fluorination of BiVO4 for the photoelectrochemical oxidation of glycerol to formic acid

Year: 2024

Type: article

Abstract: The C–C bond cleavage of biomass-derived glycerol to generate value-added C1 products remains challenging owing to its slow kinetics. We propose a surface fluorination strategy to construct dynamic dual hydrogen bonds on a semiconducting BiVO4 photoelectrode to overcome the kinetic limit of the oxidation of glycerol to produce formic acid (FA) in acidic media. Intensive spectroscopic characterizations confirm that double hydrogen bonds are formed by the interaction of the F–Bi–F sites of modified BiVO4 with water molecules, and the unique structure promotes the generation of hydroxyl radicals under light irradiation, which accelerates the kinetics of C–C bond cleavage. Theoretical investigations and infrared adsorption spectroscopy reveal that the double hydrogen bond enhances the C=O adsorption of the key intermediate product 1,3-dihydroxyacetone on the Bi–O sites to initiate the FA pathway. We fabricated a self-powered tandem device with an FA selectivity of 79% at the anode and a solar-to-H2 conversion efficiency of 5.8% at the cathode, and these results are superior to most reported results in acidic electrolytes. This work reports a surface fluorination strategy to construct dynamic dual hydrogen bonds on semiconducting BiVO4 photoelectrode for glycerol oxidation to value-added C1 production formic acid in acidic solution.

Source: Nature Communications

DOI: 10.1038/s41467-024-52161-4

Authors: Yang Liu, Huishan Shang, Bing Zhang, Dongpeng Yan, Xu Xiang

Institutions: State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Zhengzhou University, Beijing Normal University

Language: English

Topic: Advanced Photocatalysis Techniques

Subfield: Renewable Energy, Sustainability and the Environment

Field: Energy

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: gold

Estimated APC paid: $6,790