Phys.org September 5, 2023
CO2 can be selectively reduced by gold, lead, etc. supported on conductive carbon. However, the high pH in the vicinity of the electrode raises concerns about the catalyst and catalyst support degradation. Researchers in Japan used chemically stable titanium dioxide (TiO2) powder as an alternative to carbon. TiO2 maintained its particle shape and crystalline structure after in-liquid plasma treatment was used to improve its electrochemical properties. When its electrochemical properties were evaluated, they observed the disappearance of Ti4+ and Ti3+ redox peaks derived from TiO2 and a decrease in hydrogen overvoltage. The hydrogen overvoltage relationship suggested that tungsten coating on a portion of the reduced TiO2 surface. In electrocatalytic CO2 reduction, the ratio of hydrogen to carbon monoxide gas is important. Therefore, in-liquid plasma treated TiO2 is useful for the electrocatalytic CO2 reduction application… read more. TECHNICAL ARTICLEÂ
Graphical abstract. Credit: Science of The Total Environment, Volume 902, 1 December 2023, 166018Â