Oxygen reduction on Ag-MnO2/SWNT and Ag-MnO2/AB electrodes

被引：69
作者：
Hu, FP
Zhang, XG [1 ]
Xiao, F
Zhang, JL
机构：
[1] Nanjing Univ Aeronaut & Astronaut, Coll Mat Sci & Engn, Nanjing 210016, Peoples R China
[2] Xinjiang Univ, Inst Appl Chem, Urumqi 830046, Peoples R China
来源：
CARBON | 2005年 / 43卷 / 14期
基金：
中国国家自然科学基金;
关键词：
catalyst; ORR; SWNT; acetylene black (AB);
D O I：
10.1016/j.carbon.2005.06.010
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Bifunctional catalysts (Ag-MnO2)/SWNT were prepared by using a simple chemical reduction route on single-walled carbon nanotubes (SWNT). Five weight percentage of Ag-MnO2 on SWNT was found to be the best loading in terms of current density. The (Ag-MnO2)/SWNT catalyst was characterized and the kinetics towards oxygen reduction reaction (ORR) was determined and compared with that of Ag-MnO2 on acetylene black (AB) catalyst. The number of exchanged electrons for the ORR was found to be close to four on both (Ag-MnO2)/SWNT and (Ag-MnO2)/AB. The kinetic rate constant of catalytic reaction for the two catalysts was of the same order. The zinc-air batteries with both catalysts were fabricated and examined. A stable discharge potential plateau appeared at approximately 1.2 and 1.1 V with discharge capacities 261 and 190 mAh/g, respectively. (C) 2005 Elsevier Ltd. All rights reserved.
引用
收藏
页码：2931 / 2936
页数：6
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