期刊
JOURNAL OF CATALYSIS
卷 378, 期 -, 页码 113-120出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcat.2019.08.018
关键词
Proton-exchange membrane fuel cell; Oxygen reduction reaction; Non-precious metal electrocatalysts; Lattice strain
资金
- National Key Research & Development Program of China [2016YFB0101307]
- National Natural Science Foundation of China [21802069, 21003114, 21373211]
- Liaoning BaiQianWan Talents Program [201519]
- Program for Liaoning Excellent Talents in University [LR2015014]
- Dalian Excellent Young Scientific and Technological Talents [2015R006]
- Fundamental Research Funds for the Central Universities [DUT15RC(3)001, DUT15ZD225, DUT19ZD208]
Nitrogen-doped graphene is a promising non-precious metal electrocatalyst for the oxygen reduction reaction (ORR). We report that distorted nitrogen-doped graphene layers encapsulating Fe3Co nanoparticles supported on carbon (Fe3Co@NG-C) display excellent activity toward ORR in alkaline media. Compared with a commercial Pt/C electrocatalyst at a loading of 80 mu g(pt)/cm(2) on a rotating disk electrode, the Fe3Co@NG-C exhibits an onset potential positively shifted by 50 mV at 0.1 mA/cm(2) and a nearly identical half-wave potential. The Fe3Co@NG-C has minimal activity degradation during accelerated durability testing and superior tolerance to methanol than commercial Pt/C. Density functional theory calculations combined with poisoning experiments reveal that the high activity of the Fe3Co@NG-C mainly arises from strain in nitrogen-doped graphene induced by encapsulation of Fe3Co nanoparticles with exposed (1 1 0) planes, which promotes stabilization of the key OOH* intermediate involved in ORR. Our study shows the rational design of improved carbon-based electrocatalysts for ORR can be achieved by using strain engineering. (C) 2019 Elsevier Inc. All rights reserved.
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