Volume 134, Issue 44 e202212045
Forschungsartikel

A Bifunctional CdS/MoO2/MoS2 Catalyst Enhances Photocatalytic H2 Evolution and Pyruvic Acid Synthesis

Dr. Chuanbiao Bie

Dr. Chuanbiao Bie

Laboratory of Solar Fuel, Faculty of Materials Science and Chemistry, China University of Geosciences, 430074 Wuhan, P. R. China

State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, 430070 Wuhan, P. R. China

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Dr. Bicheng Zhu

Dr. Bicheng Zhu

Laboratory of Solar Fuel, Faculty of Materials Science and Chemistry, China University of Geosciences, 430074 Wuhan, P. R. China

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Dr. Linxi Wang

Corresponding Author

Dr. Linxi Wang

Laboratory of Solar Fuel, Faculty of Materials Science and Chemistry, China University of Geosciences, 430074 Wuhan, P. R. China

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Prof. Huogen Yu

Corresponding Author

Prof. Huogen Yu

Laboratory of Solar Fuel, Faculty of Materials Science and Chemistry, China University of Geosciences, 430074 Wuhan, P. R. China

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Dr. Chenhui Jiang

Dr. Chenhui Jiang

Hefei National Laboratory for Physical Sciences at Microscale, CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, 230026 Hefei, P. R. China

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Prof. Tao Chen

Prof. Tao Chen

Hefei National Laboratory for Physical Sciences at Microscale, CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, 230026 Hefei, P. R. China

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Prof. Jiaguo Yu

Corresponding Author

Prof. Jiaguo Yu

Laboratory of Solar Fuel, Faculty of Materials Science and Chemistry, China University of Geosciences, 430074 Wuhan, P. R. China

State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, 430070 Wuhan, P. R. China

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First published: 10 September 2022
Citations: 5

Abstract

The best use of photogenerated electrons and holes is crucial to boosting photocatalytic activity. Herein, a bifunctional dual-cocatalyst-modified photocatalyst is constructed based on CdS/MoO2/MoS2 hollow spheres for hydrogen evolution coupled with selective pyruvic acid (PA) production from lactic acid (LA) oxidation. MoS2 and MoO2 are simultaneously obtained from the conversion of CdMoO4 in one step. In a photocatalytic process, the MoS2 and MoO2 function as the reduction and oxidation centers on which photogenerated electrons and holes accumulate and are used for hydrogen evolution reaction (HER) and PA synthesis, respectively. By monitoring the intermediates, a two-step single-electron route for PA production is proposed, initiated by the cleavage of the α-C(sp3)−H bond in the LA. The conversion of LA and the selectivity of PA can reach ca. 29 % and 95 % after a five-hour reaction, respectively.

Conflict of interest

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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