[16p-P3-1~23] 6.2 Carbon-based thin films

[16p-P3-23] Fabrication of n-Type Polycrystalline Diamond Electrodes by Microwave Plasma Chemical Vapor Deposition for Electrochemical Reduction of CO₂

〇Hiroshi Naragino¹, Shimpei Otomo¹, Keigo Okafuji¹, Kotaro Watanabe¹, Kensuke Honda¹ (1.Yamaguchi Univ.)

Keywords:Diamond electrode, Phosphorus-doping, CO2 reduction

In this study, P-doped diamond electrodes were fabricated by microwave plasma chemical vapor deposition method for the electrochemical reduction of dissolved CO₂ in aqueous media. Compared with B-doped diamond electrode, the hydrogen evolution due to water electrolysis at P-doped diamond electrode was hardly occurred. Therefore, the dissolved CO₂ in aqueous solution could be reduced without effects of hydrogen evolution.