[15p-424-1~19] 1.4 Energy conversion, storage, resources and environment

[15p-424-1] Gas-Phase CO₂ Reduction for Solar Methane Generation Using a Cu-Based Catalyst-Loaded Gas Diffusion Electrode

〇Qingxin Jia¹, Shinichi Tanabe¹, Ichitaro Waki¹ (1.Showa Shell Inst.)

Keywords:Carbon dioxide reduction, Solar energy conversion, Gas diffusion electrode

We successfully demonstrated a gas-phase CO₂ photoreduction reaction under simulated sunlight (AM1.5) in the ambient conditions using a Cu-based catalyst loaded-gas diffusion electrode (GDE) together with a tandem photoanode consisted of a seimiconductor photocatalyst and a CIS-PV. Without an external applied bias, CH₄ and C₂H₄ were produced. The solar-to-chemical energy conversion efficiency for CH₄ generation reached 0.61%. These results show that direct CO₂ reduction from a gas phase using a GDE is promising for yielding multi-electron reduced products.