质子交换膜燃料电池
催化作用
铂金
碳化
碳纤维
金属
化学
星团(航天器)
氧还原反应
沸石咪唑盐骨架
氮气
无机化学
纳米颗粒
氧气
化学工程
材料科学
吸附
纳米技术
金属有机骨架
电化学
物理化学
电极
有机化学
复合材料
复合数
程序设计语言
计算机科学
工程类
作者
Qingtao Liu,Jieyuan Liu,Xiaofang Liu,Yu Wang,Song Hong,Jianbo Wu,Jiaxiang Shang,Ronghai Yu,Jungang Miao,Jianglan Shui
出处
期刊:Applied physics reviews
[American Institute of Physics]
日期:2023-05-31
卷期号:10 (2)
被引量:6
摘要
To develop efficient and durable acidic oxygen–reduction–reaction (ORR) catalysts based on all platinum group metals (PGMs) is crucial for large-scale application of proton-exchange membrane fuel cells (PEMFCs) but challenging. Here, we report a nitrogen coordination-induced strong metal–support interaction that can tune the surface atoms of ORR-inactive PGM clusters into efficient and durable active sites. Taking Rh as an example, the carbonization of Rh-overdoped zeolitic imidazolate framework-8 results in a large number of Rh clusters (with a little atomic Rh) in porous nitrogen-doped carbon. The cluster surface atoms coordinate with the nitrogen of the carbon support, forming much stronger metal–support interactions than that of common N-doped carbon-supported metal nanoparticles. The activity of surface-activated Rh clusters is close to that of Pt/C. The regulation rules for the surface active sites inherit most of the characteristics of the corresponding single-atom catalysts, but without their severe instability problem. This surface activation strategy has also shown applicable to other PGMs, thereby it is a promising way to alleviate the reliance of PEMFCs on platinum.
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