期刊
NEW JOURNAL OF CHEMISTRY
卷 45, 期 24, 页码 10802-10809出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1nj01110c
关键词
-
资金
- National Natural Science Foundation of China [51634003]
The nature of carbon support greatly affects the catalytic properties of supported catalysts. Introducing Co during fabrication can regulate the oxygen functionalization behavior of carbon, leading to enhanced catalytic stability of Pt/NHC@Co in the oxygen reduction reaction (ORR).
The nature of the carbon support has huge effects on the catalytic properties of supported catalysts. When utilized for electrochemical purposes as a support for precious metals in acid media, the oxygen functionalization behavior is even more vital to the stability of carbon because of the acceleration of carbon oxidation by precious metals. Here, we demonstrate the regulation of oxygen functionalization behavior of carbon via introducing Co during the fabrication process, and the resultant N-doped hollow carbon embedded with Co (NHC@Co) greatly boosts the catalytic stability of Pt/NHC@Co in the oxygen reduction reaction (ORR). On the one hand, the utilization of Co during fabrication promotes the graphitic level of carbon, which provides fewer anchoring points for adsorbed oxygen, and on the other hand, the remaining Co nanoparticles exhibit strong electron donating effects, which upshifts the Fermi level of C and strengthens its bonding with oxygen. As a result, a small amount of oxygen functional groups is bonded strongly on the surface of NHC@Co, hindering the further catalytic oxidation of carbon and improving the electrochemical stability of Pt/NHC@Co even under harsh acidic ORR conditions.
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