2024年10月20日，Elsevier 旗下top期刊《Journal of Colloid and Interface Science》（影响因子：9.4）在线发表了云南师范大学化学化工学院徐全清博士、傅文甫教授最新研究成果《Pt single atoms promoting the construction of asymmetric double sites to achieve highly selective photoreduction of CO2 to ethylene》，第一作者单位为云南师范大学化学化工学院，云南师范大学化学化工学院徐全清博士、傅文甫教授为共同通讯作者。

Abstract

In this work, Pt single atoms (SAs) were engineered on the surface of CdIn2S4 (CIS) to trigger abundant generation and stable existence of sulfur vacancies (Sv). Through quasi in situ X-ray photoelectron spectroscopy (XPS) and work function analysis, the photogenerated electrons are first captured by Pt SAs and Sv, and then transferred from Pt SAs to Sv, ultimately increasing the electron density of Sv. Meanwhile, Sv have significant advantages in adsorbing CO2 molecules. According to the number of transferred electrons, the optimized 0.8 %Pt/CIS has 76 times the photocatalytic performance of pristine CIS, and the selectivity of ethylene (C2H4) is up to 99.3 %. The carbon–carbon coupling reaction between *CO and *CHO adsorbed on double sites of Sv and In atoms is identified as the rate-determining step. Theoretical calculations suggest that the energy barrier required for coupling of intermediates *CO and *CHO is the lowest, conducive to the selective generation of C2H4.

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