期刊
RSC ADVANCES
卷 7, 期 50, 页码 31574-31581出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7ra03675b
关键词
-
资金
- National Natural Science Foundations of China [U1664259]
- CAS-DOE Cooperation Project [121421KYSB20160009]
Alkaline anion exchange membrane fuel cells have faster kinetics for the oxygen reduction reaction (ORR) than proton exchange membrane fuel cells; however, the hydrogen oxidation reaction (HOR) at anodes with precious metals is more sluggish under alkaline conditions than that under acidic conditions, which hinders the further development of fuel cells. Herein, a novel catalyst, iridium nanoparticle-supported ceria-carbon black (10% Ir/CeO2-C), was developed for use in the hydrogen oxidation reaction (HOR) under basic conditions. Cyclic voltammetry reveals that the electrochemical surface area of 10% Ir/CeO2-C is 1.5 times that of 10% Ir/C. The RDE measurement suggests that the exchange current density of 10% Ir/CeO2-C is 2.4 times that of 10% Ir/C, and the mass activity and specific activity of 10% Ir/CeO2-C for HOR are greater than those of 10% Ir/C by 2.8 fold and 1.8 fold, respectively. The effective prevention of the agglomeration of the highly dispersed Ir nanoparticles could be ascribed to the strong metal-support interaction between Ir and CeO2, and the promoted electrocatalytic activity would benefit from the oxophilic effect due to the higher oxygen storage-release capacity of ceria. Thus, 10% Ir/CeO2-C would be a good candidate for use at the anode of alkaline anion exchange membrane fuel cells.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据