期刊
ACS CATALYSIS
卷 -, 期 -, 页码 7571-7578出版社
AMER CHEMICAL SOC
DOI: 10.1021/acscatal.2c00554
关键词
electrocatalysis; oxygen reduction; intermetallic; ternary; ligand effect
资金
- National Key Research and Development Program of China [2017YFB0102900, 2016YFB0101201]
- National Natural Science Foundation of China (NSFC) [22072048, 21476088, 21776104]
- Guangdong Provincial Department of Science and Technology [2021A1515010128, 2015A030312007]
This study demonstrates the development of a highly active and durable Pt-based ternary catalyst for improving the sluggish oxygen reduction reaction in fuel cells. The catalyst shows faster reaction kinetics and minimal activity loss compared to commercial catalysts, and its superior performance has been verified in practical applications.
Developing advanced electrocatalysts toward the sluggish oxygen reduction reaction (ORR) kinetics is critical to fuel cells but still an enormous challenge at present. Here, we demonstrate a highly active and durable Pt-based ternary catalyst, ordered Pt3Co0.6Ti0.4 intermetallic nanoparticles (similar to 3 nm) supported on ZIF-8-derived mesoporous carbon (Pt3Co0.6Ti0.4/DMC). The Pt3Co0.6Ti0.4/DMC catalyst exhibits faster ORR kinetics compared to Pt3Co/DMC and commercial Pt/C with minimal activity loss (20.1%) and only 5 mV decay in half-wave potential after 20,000 potential cycles. More importantly, its improved performances have also been proven in the H-2/air PEM single cell test. The theoretical calculations reveal that the substitution of Ti for Co induces a strengthened ligand effect and optimizes the surface electronic structure of Pt3Co0.6Ti0.4, resulting in the significantly enhanced ORR activity. This work provides a reliable and promising approach for the development of efficient and robust Pt-based ternary intermetallic electrocatalysts for practical fuel cell applications.
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