催化作用
电催化剂
纳米颗粒
质子交换膜燃料电池
碳纤维
化学工程
电解质
材料科学
无机化学
化学
纳米技术
电化学
有机化学
复合材料
电极
物理化学
工程类
复合数
作者
Wei Liao,Shangyan Zhou,Zhengcheng Wang,Fei Liu,Hua Pan,Tian Xie,Qingmei Wang
出处
期刊:Chemcatchem
[Wiley]
日期:2021-09-23
卷期号:13 (23): 4925-4930
被引量:6
标识
DOI:10.1002/cctc.202101096
摘要
Abstract The high cost and deficiency of long‐term durability of carbon supported Pt catalysts have been regarded as obstacle that impeding their practical proton exchange membrane fuel cells (PEMFCs) technologies. Furtherly, iron and nitrogen co‐doped carbons (Fe/NC) are emerging as a steady electrocatalyst. Unfortunately, there are less‐active sites in acidic electrolyte. Herein, combining the advantages of Fe/NC and Pt catalysts, we propose an in‐situ surfactant‐free self‐templating solution reduction strategy to construct Pt nanoparticles (NPs) onto well‐devised Fe/NC porous nanostructures in order to manufacture highly performing Pt−Fe/NC catalyst for oxygen reduction reaction (ORR). The obtained Pt−Fe/NC catalyst displays excellent ORR performance, realizing an account of 2.53 improvement in specific activity and an account of 1.20 strengthening in mass activity toward ORR compared to the commercial Pt/C catalysts. Stability tests confirm that the as‐synthesized Pt−Fe/NC catalyst is more electrochemically steady than the commercial Pt/C catalysts on account of the electronic interaction between Pt and N which result from the difference in electronegativity. Our work provides a promising strategy for exploring the accomplishment of better ORR in acid electrolytes.
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