Статья

Turning Au Nanoclusters Catalytically Active for Visible-Light-Driven CO<sub>2</sub> Reduction through Bridging Ligands

Xiaofeng CuiAnhui Key Laboratory of Photoelectric-Magnetic Functional Materials, School of Chemistry and Chemical Engineering, Anqing Normal University, Anqing, Anhui 246011, P. R. ChinaJin WangHefei National Laboratory for Physical Sciences at the Microscale, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), School of Chemistry and Materials Science, and National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230026, P. R. ChinaBing LiuSchool of Chemical and Material Engineering, Jiangnan University, Wuxi, Jiangsu 214122, P. R. ChinaShan LingAnhui Key Laboratory of Photoelectric-Magnetic Functional Materials, School of Chemistry and Chemical Engineering, Anqing Normal University, Anqing, Anhui 246011, P. R. ChinaRan LongHefei National Laboratory for Physical Sciences at the Microscale, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), School of Chemistry and Materials Science, and National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230026, P. R. ChinaYujie XiongHefei National Laboratory for Physical Sciences at the Microscale, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), School of Chemistry and Materials Science, and National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China

2018en

ABI

Аннотация

Development of visible-light photocatalytic materials is an ultimate goal for solar-driven CO2 conversion. Au nanoclusters (NCs) may potentially serve as components for harvesting visible light but can hardly perform solar-driven CO2 reduction due to the lack of catalytic sites. Herein, we report an effective strategy for turning Au nanoclusters catalytically active for visible-light CO2 reduction, in which metal cations (Fe2+, Co2+, Ni2+, and Cu2+) are grafted to the Au NCs using l-cysteine as a bridging ligand. The metal–S bonding bridge facilitates the electron transfer from Au NCs to metal cations so that the grafted metal cations can receive photoinduced electrons and work as catalytic sites for CO2 reduction. The varied d-band centers and binding energies with CO2 for different metal cations allow tuning electron transfer efficiency and CO2 activation energy. Furthermore, the photostability of Au NCs-based catalyst can be significantly enhanced through the encapsulation with metal–organic frameworks. This work opens a new door for the photocatalyst design based on metal clusters and sheds light on the surface engineering of metal clusters toward specific applications.

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Идентификаторы

DOI: 10.1021/jacs.8b06723

Цитирования и источники

Цитирований: 2Использованных источников: 0

Показатели — AkademScholar