Substituent position effect of Co porphyrin on oxygen electrocatalysis

作     者：Haoyuan Lv Hongbo Guo Kai Guo Haitao Lei Wei Zhang Haoquan Zheng Zuozhong Liang Rui Cao Haoyuan Lv;Hongbo Guo;Kai Guo;Haitao Lei;Wei Zhang;Haoquan Zheng;Zuozhong Liang;Rui Cao

作者机构：Key Laboratory of Applied Surface and Colloid ChemistryMinistry of EducationSchool of Chemistry and Chemical EngineeringShaanxi Normal UniversityXi’an 710119China 

出 版 物：《Chinese Chemical Letters》 (中国化学快报（英文版）)

年 卷 期：2021年第32卷第9期

页      面：2841-2845页

核心收录：

学科分类：081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 

基　　金：support from the National Natural Science Foundation of China(Nos.21808138 and 21773146) Fok Ying-Tong Education Foundation for Outstanding Young Teachers in University,Fundamental Research Funds for the Central Universities(Nos.GK202103029 and GK202103045) Young Talent fund of University Association for Science and Technology in Shaanxi,China China Postdoctoral Science Foundation(No.2019T120877) Research Funds of Shaanxi Normal University。 

主　　题：Oxygen electrocatalysis Oxygen reduction reaction Oxygen evolution reaction Co porphyrin Substituent effect 

摘      要：Substituent effect of metal porphyrin molecular catalysts plays a crucial role in determining the catalytic activity of oxygen electrocatalysis.Herein,substituent position effect of Co porphyrins on oxygen electrocatalysis,including the oxygen reduction reaction(ORR)and the oxygen evolution reaction(OER),was investigated.Two Co porphyrins,namely 2,4,6-OMe-CoP and 3,4,5-OMe-CoP,were selected as the research objects.The ORR and OER performance was evaluated by drop-coating molecular catalysts on carbon nanotubes(CNTs).The resulted 3,4,5-OMe-CoP/CNT exhibited high bifunctional electrocatalytic activities and better long-term stability for both ORR and OER than 2,4,6-OMe-CoP/CNT.Furthermore,when applied in the Zn-air battery,3,4,5-OMe-CoP/CNT exhibited comparable performance to that with precious metal-based materials.The enhanced catalytic activity may be attributed to the improved charge transfer rate,mass transfer and hydrophilicity.This work provides an effective strategy to further enhance catalytic activity by introducing substituent position effect,which is of great importance for developing more efficient energy-related electrocatalysts.