A Highly Efficient pH‐Universal HOR Catalyst with Engineered Electronic Structures of Single Pt Sites by Isolated Co Atoms
Zeyi Huang, Ruihu Lu, Yuezhou Zhang, Wen Chen, Guanzhen Chen, Chao Ma, Ziyun Wang, Yunhu Han, Wei Huang
Abstract
Abstract Developing a high‐efficiency, stable, and CO‐toxicant‐resistant low‐cost hydrogen oxidation reaction (HOR) electrocatalyst is challenging but is vital for practical proton/anion exchange membrane fuel cells. Herein, an efficient pH‐universal HOR catalyst Pt 1 @Co 1 CN is fabricated, in which the electronic structure of single Pt sites is modulated by isolated Co atoms pre‐anchored on nitrogen‐doped carbon. Pt 1 @Co 1 CN exhibits superior HOR activity and durability under pH‐universal media than Pt 1 @CN (anchored single Pt atoms on nitrogen‐doped carbon) and commercial PtRu/C and Pt/C. More importantly, Pt 1 @Co 1 CN possesses much better CO anti‐poisoning ability than Pt 1 @CN and commercial PtRu/C and Pt/C. It is speculated that the superior pH‐universal HOR performance can be attributed to the inter‐regulation of adjacent Co and Pt sites, leading to the downshift of anti‐bonding state and consequently strengthening the *H adsorption, which promotes the kinetics of HOR.