Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 61, Issue 44, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202212045
Keywords
CdS; Dual Cocatalysts; Hollow Sphere; Hydrogen Evolution; Organic Synthesis
Categories
Funding
- National Key Research and Development Program of China [2018YFB1502001]
- National Natural Science Foundation of China [51961135303, 51932007, U1905215, 21871217, 21905219, 22238009, 22202187]
- National Postdoctoral Program for Innovative Talents [BX2021275]
- China Postdoctoral Science Foundation [2022M712957, 2021TQ0310]
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A bifunctional dual-cocatalyst-modified photocatalyst is constructed for hydrogen evolution and selective pyruvic acid production. A two-step single-electron route for pyruvic acid production is proposed based on monitoring the intermediates.
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 alpha-C(sp(3))-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.
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