Highly Efficient Photocatalytic Conversion of CO2 to CO Catalyzed by Surface-Ligand-Removed and Cd-Rich CdSe Quantum Dots

Wu Xia; Jin Wu; Jun-Chao Hu; Shanshan Sun; Ming-De Li; Hongfang Liu; Minhuan Lan; Feng Wang

doi:10.1002/cssc.201901633

Highly Efficient Photocatalytic Conversion of CO₂ to CO Catalyzed by Surface-Ligand-Removed and Cd-Rich CdSe Quantum Dots

ChemSusChem. 2019 Oct 21;12(20):4617-4622. doi: 10.1002/cssc.201901633. Epub 2019 Sep 24.

Authors

Wu Xia¹, Jin Wu¹, Jun-Chao Hu¹, Shanshan Sun², Ming-De Li², Hongfang Liu¹, Minhuan Lan³, Feng Wang¹

Affiliations

¹ Key Laboratory of Materials Chemistry for Energy Conversion and Storage of Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, P.R. China.
² Department of Chemistry, Shantou University, Shantou, 515063, P.R. China.
³ Key Laboratory of Hunan Province for Water Environment and Agriculture Product Safety, College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, P.R. China.

PMID: 31448535
DOI: 10.1002/cssc.201901633

Abstract

Surface ligand-removed and Cd-rich CdSe quantum dots (QDs) exhibited exceptional activity as photocatalyst for the conversion of CO₂ to CO. A CO production rate up to 789 mmol g^-1 h^-1 was achieved in a triethylamine/dimethylformamide mixture under visible-light irradiation. Mechanistic studies revealed that improving the Cd/Se stoichiometric ratio and exposing more active surface Cd atoms significantly enhanced the activity of CdSe QDs for CO₂ photoreduction.

Keywords: CO2 reduction; artificial photosynthesis; photocatalysis; quantum dots; solar fuels.

Abstract

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