文献类型：期刊文献

英文题名：Enhancing oxygen reduction activity of dinuclear copper complexes loaded on an N-doped carbon support via a low-temperature pyrolysis strategy

作者：Chi, Hua-Min[1];Yang, Kun-Zu[1];Guo, Peng-Peng[1];Xu, Ying[1];Xu, Chao[1];Su, Yong-Zhi[1];Liu, Xin[1];Liu, Jin-Gang[1]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Key Lab Adv Mat, Shanghai 200237, Peoples R China

年份：2024

卷号：53

期号：27

起止页码：11464

外文期刊名：DALTON TRANSACTIONS

收录：;EI(收录号：20242716563245);WOS:【SCI-EXPANDED(收录号:WOS:001262709600001)】；

基金：Financial support from the National Natural Science Foundation of China (No. 21571062), the Program for Professor of Special Appointment (Eastern Scholar) at the Shanghai Institutions of Higher Learning, and the Fundamental Research Funds for the Central Universities (No. 222201717003) is kindly acknowledged.

语种：英文

外文关键词：Bismuth compounds - Carbon - Catalyst activity - Catalyst selectivity - Charge transfer - Coordination reactions - Copper compounds - Cost effectiveness - Doping (additives) - Electrocatalysts - Oxygen - Potassium hydroxide - Pyrolysis - Temperature - Zinc air batteries

摘要：Bioinspired by the active sites of multicopper oxidases (MCOs), bi/multinuclear copper complexes have attracted great attention in promoting catalytic activity for the oxygen reduction reaction (ORR). Herein, we report the preparation of a Cu-N-C electrocatalyst Cu-BPOZ@CNB-400 for efficient ORR, which was obtained by low temperature pyrolysis of a dinuclear 2,5-bis(2-pyridyl)-1,3,4-oxadiazole (BPOZ) copper complex loaded on a N-doped carbon support at 400 degrees C. Cu-BPOZ@CNB-400 exhibited a half-wave potential (E-1/2) of 0.86 V vs. RHE for the ORR in 0.1 M KOH solution, which was significantly higher than that of the Cu-BPOZ@CNB-800 (E-1/2 = 0.83 V) catalyst treated under high temperature (at 800 degrees C) and the control catalyst Cu-Phen@CNB-400 (E-1/2 = 0.82 V) derived from low-temperature-treatment (at 400 degrees C) of a mononuclear phenanthroline-coordinated-Cu complex loaded on a N-doped carbon support. When Cu-BPOZ@CNB-400 was applied as the cathode catalyst in zinc-air batteries a maximum power density (P-max) of 127 mW cm(-2) could be achieved, demonstrating comparable catalyst performance to the commercial 20 wt% Pt/C (P-max = 122 mW cm(-2)) and the control Cu-Phen@CNB-400 catalyst (P-max = 105 mW cm(-2)) under similar experimental conditions. Low-temperature pyrolysis of dinuclear copper complexes on a carbon support improved the charge transfer efficiency, inhibited metal aggregation, and could produce highly dispersed Cu-N-C catalysts with dinuclear copper sites for promoting the 4e(-)-reduction selectivity of the ORR. It thus provides a cost-effective approach for the controllable fabrication of efficient ORR catalysts to be applied for energy conversion devices.