Electrochemical reduction of CO_(2) is a promising strategy to manage the global carbon balance by transforming CO_(2) into chemicals. The efficiency of CO_(2) electroreduction is largely dependent on the design of hy...Electrochemical reduction of CO_(2) is a promising strategy to manage the global carbon balance by transforming CO_(2) into chemicals. The efficiency of CO_(2) electroreduction is largely dependent on the design of hybrid electrode where both support and catalyst govern the performance of the electrolyzer. In this work,TiO_(2) calcined at different temperatures, was used as a support for immobilization of cobalt tetraphenyl porphyrin(CoTPP) and its effect on CO_(2) reduction was studied. It is demonstrated that the crystalline phase of TiO_(2) and doping of TiO_(2) apparently affecting CO_(2) electroreduction. It is found that anatase phase exhibits higher activity and selectivity compared to rutile due to the enhanced conductivity which in turn enables faster electron transfer between the support and CoTPP. As for dopants, the carbon doping in anatase TiO_(2) is proven to further enhance its conductivity, consequently resulting in the enhanced performance. This study implies that the rational design of supports is important for the performance of the hybrid electrode towards electrochemical CO_(2) reduction.展开更多
基金Financial support from the ARC Discovery Project(DP1901013720)。
文摘Electrochemical reduction of CO_(2) is a promising strategy to manage the global carbon balance by transforming CO_(2) into chemicals. The efficiency of CO_(2) electroreduction is largely dependent on the design of hybrid electrode where both support and catalyst govern the performance of the electrolyzer. In this work,TiO_(2) calcined at different temperatures, was used as a support for immobilization of cobalt tetraphenyl porphyrin(CoTPP) and its effect on CO_(2) reduction was studied. It is demonstrated that the crystalline phase of TiO_(2) and doping of TiO_(2) apparently affecting CO_(2) electroreduction. It is found that anatase phase exhibits higher activity and selectivity compared to rutile due to the enhanced conductivity which in turn enables faster electron transfer between the support and CoTPP. As for dopants, the carbon doping in anatase TiO_(2) is proven to further enhance its conductivity, consequently resulting in the enhanced performance. This study implies that the rational design of supports is important for the performance of the hybrid electrode towards electrochemical CO_(2) reduction.
