Carbon Dioxide Anion Radicals Assisted Highly Efficient Photocatalytic H2O2 Production over Bi(C2O4)OH

Ruofan Li; Juxue Wang; Hongxiang Chu; Di Zeng; Wenjing Wang; Bingkun Cui; Ling Zhang; Wenzhong Wang

doi:10.1021/acs.jpclett.3c02674

Carbon Dioxide Anion Radicals Assisted Highly Efficient Photocatalytic H₂O₂ Production over Bi(C₂O₄)OH

J Phys Chem Lett. 2023 Nov 30;14(47):10570-10577. doi: 10.1021/acs.jpclett.3c02674. Epub 2023 Nov 17.

Authors

Ruofan Li^{1

2}, Juxue Wang^{1

2}, Hongxiang Chu³, Di Zeng^{1

2}, Wenjing Wang^{1

2}, Bingkun Cui^{1

2}, Ling Zhang^{1

2}, Wenzhong Wang^{1

2

3}

Affiliations

¹ State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050, China.
² Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China.
³ School of Chemistry and Materials Science, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, 1 Sub-lane Xiangshan, Hangzhou 310024, China.

PMID: 37976146
DOI: 10.1021/acs.jpclett.3c02674

Abstract

Carbon dioxide anion radical (CO₂^•-) can act as a versatile single electron reductant, but its generation pathways are quite limited. Herein, we demonstrate that oxalic acid (OA) could be effectively and continuously utilized to produce CO₂^•- over Bi(C₂O₄)OH, a novel photocatalyst, under light irradiation. Bi(C₂O₄)OH would proceed with self-redox reactions under the light irradiation producing CO₂^•-, through the oxidation of C₂O₄^2-. OA in the solution could recoordinate with Bi³⁺, thus maintaining the structure of the photocatalysts and the stability of the reactions. Benefiting from the fast reaction between CO₂^•- and O₂ in forming ^•O₂^-, hydrogen peroxide (H₂O₂) would be efficiently produced (219.0 μmol/h). This study proposes a novel approach for harnessing OA containing wastewater and explores its potential application in the efficient production of H₂O₂.