Significantly enhanced oxygen reduction activity of Cu/CuN_xC_y co-decorated ketjenblack catalyst for Al–air batteries  

作　　者：Fuzhi Li Jingsha Li Qiuju Feng Jun Yan Yougen Tang Haiyan Wang 

机构地区：[1]College of Chemistry and Chemical Engineering,Central South University [2]College of Life Sciences and Chemistry,Hunan University of Technology [3]College of Chemistry and Chemical Engineering,Jishou University [4]Hunan Provincial Key Laboratory of Efficient and Clean Utilization of Manganese Resources,Central South University

出　　处：《Journal of Energy Chemistry》2018年第2期419-425,共7页能源化学（英文版）

基　　金：supported by the National Natural Science Foundation of China (nos. 21671200 and 21571189);Fujian Provincial Natural Science Foundation of China (no. 2015J01072);the Hunan Provincial Science and Technology Plan Project, China (no. 2016TP1007);Innovation-Driven Project of Central South University (no. 2016CXS009)

摘　　要：Highly efficient and non-precious catalysts are imperative for oxygen reduction reaction（ORR） to replace Pt/C. Anchoring efficient active species to carbon supports is a promising and scalable strategy. Here we synthesize Cu nanoparticles and noncrystalline CuNxCy species co-decorated ketjenblack（KB） carbon catalyst（denoted as Cu-N-KB-acid） by a facile and scalable method using copper sulfate, melamine, and KB as raw materials. An initial one-pot hydrothermal treatment is designed before pyrolysis process to achieve the good distribution of Cu and melamine on KB via a possible chelation effect. Owing to the synergistic effect of Cu and CuNxCy on KB, this composite catalyst displays excellent ORR catalytic activity in alkaline solution, which is comparable to the commercial 20% Pt/C. When used as a catalyst in a home-made Al-air battery, it shows a stable discharge voltage of 1.47 V at a discharge density of 50 mA cm-2, a little higher than that of Pt/C（1.45 V）.Highly efficient and non-precious catalysts are imperative for oxygen reduction reaction（ORR） to replace Pt/C. Anchoring efficient active species to carbon supports is a promising and scalable strategy. Here we synthesize Cu nanoparticles and noncrystalline CuNxCy species co-decorated ketjenblack（KB） carbon catalyst（denoted as Cu-N-KB-acid） by a facile and scalable method using copper sulfate, melamine, and KB as raw materials. An initial one-pot hydrothermal treatment is designed before pyrolysis process to achieve the good distribution of Cu and melamine on KB via a possible chelation effect. Owing to the synergistic effect of Cu and CuNxCy on KB, this composite catalyst displays excellent ORR catalytic activity in alkaline solution, which is comparable to the commercial 20% Pt/C. When used as a catalyst in a home-made Al-air battery, it shows a stable discharge voltage of 1.47 V at a discharge density of 50 mA cm-2, a little higher than that of Pt/C（1.45 V）.

关 键 词：Al-air batteries Oxygen reduction reaction ELECTROCATALYST Copper nanoparticles Copper-nitrogen doping 

分 类 号：O643.36[理学—物理化学] TM911.41[理学—化学]