Effect of TiO_(2) support on immobilization of cobalt porphyrin for electrochemical CO_(2) reduction

作     者：Shengshen Gu Aleksei N.Marianov Haimei Xu Yijiao Jiang Shengshen Gu;Aleksei N.Marianov;Haimei Xu;Yijiao Jiang

作者机构：School of EngineeringMacquarie UniversitySydneyNSW2109Australia 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2021年第80卷第21期

页      面：20-27页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 081704[工学-应用化学] 08[工学] 0817[工学-化学工程与技术] 

基　　金：Financial support from the ARC Discovery Project(DP1901013720) 

主　　题：CO_(2)electroreduction Cobalt porphyrin Immobilization TiO_(2)support Carbon doping 

摘      要：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.