Electrochemical CO2 Reduction over a MoS2/Mo Electrode

다국어 초록 (Multilingual Abstract)

Molybdenum disulfide (MoS2) is a promising material for energy and environmental applications. In this paper, we report the direct hydrothermal growth of MoS2 on a Mo support and its application in the rarely explored electrochemical CO2 reduction (EC CO2R) process. To investigate the effects of metal overlayers and the MoS2 support, Au, Ag, and Cu were sputter-deposited on a MoS2 electrode. Large amounts of CH4, C2−3 hydrocarbons, and formate were produced via EC CO2R on bare MoS2. The introduction of a Au overlayer on MoS2 enhanced the production of CO, methanol, and formate. Furthermore, the alkanes (C𝑛H2𝑛+2, 𝑛 = 2, 3) to alkenes (C𝑛H2𝑛, 𝑛 = 2, 3) ratio was dependent on the applied potential and overlayer metals. Notably, photoirradiation remarkably increased the CO and C2H4 concentrations by 28-fold and 10-fold, respectively. These findings provide valuable insights for the development of MoS2-based materials for CO2 recycling.