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

页码：2931 / 2936

页数：6

共 29 条

[1] Decoration of activated carbon nanotubes with copper and nickel [J].