Enabling Visible‐Light‐Driven Selective CO<sub>2</sub> Reduction by Doping Quantum Dots: Trapping Electrons and Suppressing H<sub>2</sub> Evolution

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  • Jin Wang
    Hefei National Laboratory for Physical Sciences at the Microscale <i>i</i>ChEM (Collaborative Innovation Center of Chemistry for Energy Materials) School of Chemistry and Materials Science National Synchrotron Radiation Laboratory University of Science and Technology of China Hefei Anhui 230026 P. R. China
  • Tong Xia
    Hefei National Laboratory for Physical Sciences at the Microscale <i>i</i>ChEM (Collaborative Innovation Center of Chemistry for Energy Materials) School of Chemistry and Materials Science National Synchrotron Radiation Laboratory University of Science and Technology of China Hefei Anhui 230026 P. R. China
  • Lei Wang
    Hefei National Laboratory for Physical Sciences at the Microscale <i>i</i>ChEM (Collaborative Innovation Center of Chemistry for Energy Materials) School of Chemistry and Materials Science National Synchrotron Radiation Laboratory University of Science and Technology of China Hefei Anhui 230026 P. R. China
  • Xusheng Zheng
    Hefei National Laboratory for Physical Sciences at the Microscale <i>i</i>ChEM (Collaborative Innovation Center of Chemistry for Energy Materials) School of Chemistry and Materials Science National Synchrotron Radiation Laboratory University of Science and Technology of China Hefei Anhui 230026 P. R. China
  • Zeming Qi
    Hefei National Laboratory for Physical Sciences at the Microscale <i>i</i>ChEM (Collaborative Innovation Center of Chemistry for Energy Materials) School of Chemistry and Materials Science National Synchrotron Radiation Laboratory University of Science and Technology of China Hefei Anhui 230026 P. R. China
  • Chao Gao
    Hefei National Laboratory for Physical Sciences at the Microscale <i>i</i>ChEM (Collaborative Innovation Center of Chemistry for Energy Materials) School of Chemistry and Materials Science National Synchrotron Radiation Laboratory University of Science and Technology of China Hefei Anhui 230026 P. R. China
  • Junfa Zhu
    Hefei National Laboratory for Physical Sciences at the Microscale <i>i</i>ChEM (Collaborative Innovation Center of Chemistry for Energy Materials) School of Chemistry and Materials Science National Synchrotron Radiation Laboratory University of Science and Technology of China Hefei Anhui 230026 P. R. China
  • Zhengquan Li
    Key Laboratory of the Ministry of Education for Advanced Catalysis Materials Zhejiang Normal University Jinhua Zhejiang 321004 P. R. China
  • Hangxun Xu
    Hefei National Laboratory for Physical Sciences at the Microscale <i>i</i>ChEM (Collaborative Innovation Center of Chemistry for Energy Materials) School of Chemistry and Materials Science National Synchrotron Radiation Laboratory University of Science and Technology of China Hefei Anhui 230026 P. R. China
  • Yujie Xiong
    Hefei National Laboratory for Physical Sciences at the Microscale <i>i</i>ChEM (Collaborative Innovation Center of Chemistry for Energy Materials) School of Chemistry and Materials Science National Synchrotron Radiation Laboratory University of Science and Technology of China Hefei Anhui 230026 P. R. China

Description

<jats:title>Abstract</jats:title><jats:p>Quantum dots (QDs), a class of promising candidates for harvesting visible light, generally exhibit low activity and selectivity towards photocatalytic CO<jats:sub>2</jats:sub> reduction. Functionalizing QDs with metal complexes (or metal cations through ligands) is a widely used strategy for improving their catalytic activity; however, the resulting systems still suffer from low selectivity and stability in CO<jats:sub>2</jats:sub> reduction. Herein, we report that doping CdS QDs with transition‐metal sites can overcome these limitations and provide a system that enables highly selective photocatalytic reactions of CO<jats:sub>2</jats:sub> with H<jats:sub>2</jats:sub>O (100 % selectivity to CO and CH<jats:sub>4</jats:sub>), with excellent durability over 60 h. Doping Ni sites into the CdS lattice leads to effective trapping of photoexcited electrons at surface catalytic sites and substantial suppression of H<jats:sub>2</jats:sub> evolution. The method reported here can be extended to various transition‐metal sites, and offers new opportunities for exploring QD‐based earth‐abundant photocatalysts.</jats:p>

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