期刊
ACS APPLIED MATERIALS & INTERFACES
卷 8, 期 26, 页码 16664-16669出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.6b03482
关键词
alcohol-tolerant platinum electrocatalyst; fuel cells; molecule-sieving effect; nitrogen-doped carbon nanocages; oxygen reduction
资金
- National Nature Science Foundation of China [51232003, 21473089, 21373108, 51571110, 21573107]
- 973 programs [2013CB932902]
- Suzhou Science and Technology Project [ZXG2013025]
- Changzhou Technology Support Program [CE20130032]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
Pt-based electrocatalysts are the most popular for direct alcohol fuel cells, but their performances easily deteriorate for the oxygen reduction reaction (ORR) at the cathode because of the alcohol crossover effect. Herein, we report the novel Pt electrocatalyst encapsulated inside nitrogen-doped carbon nanocages (Pt@NCNC), which presents excellent alcohol-tolerant ORR activity and durability in acidic media, far superior to the Pt counterpart immobilized outside the nanocages (Pt/NCNC). The superb performance is correlated with the molecule-sieving effect of the micropores penetrating through the shells of the nanocages, which admit the small-sized oxygen and ions but block the large-sized alcohols into the nanocages. This mechanism is confirmed by examining the size dependence of ORR and alcohol oxidation activities by regulating the micropores sizes. This study provides a promising strategy to develop the superior alcohol-tolerant Pt-based ORR electrocatalyst in acidic media.
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