Simple Cadmium Sulfide Compound with Stable 95 % Selectivity for Carbon Dioxide Electroreduction in Aqueous Medium

Yu Hang Li; Ling Cheng; Peng Fei Liu; Le Zhang; Meng Yang Zu; Chong Wu Wang; Yan Huan Jin; Xiao Ming Cao; Hua Gui Yang; Chunzhong Li

doi:10.1002/cssc.201800372

Simple Cadmium Sulfide Compound with Stable 95 % Selectivity for Carbon Dioxide Electroreduction in Aqueous Medium

ChemSusChem. 2018 May 9;11(9):1421-1425. doi: 10.1002/cssc.201800372. Epub 2018 Apr 14.

Authors

Affiliations

¹ Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, PR China.
² Key Laboratory for Advanced Materials, Centre for Computational Chemistry and Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, PR China.

PMID: 29542286
DOI: 10.1002/cssc.201800372

Abstract

A simple cadmium sulfide nanomaterial is found to be an efficient and stable electrocatalyst for CO₂ reduction in aqueous medium for more than 40 h with a steady CO faradaic efficiency of approximately 95 %. Moreover, it can realize a current density of -10 mA cm^-2 at an overpotential of -0.55 V on a porous substrate with similar selectivity. Theoretical and experimental results confirm that the high selectivity for CO₂ reduction is due to its (0 0 0 2) face with sulfur vacancies that prefers CO₂ molecule reduction in aqueous medium.

Keywords: CO2 conversion; cadmium sulfide; electrocatalysis; heterogeneous catalysis; reaction mechanisms.