电催化剂
质子交换膜燃料电池
催化作用
碳纤维
循环伏安法
化学工程
材料科学
阴极
电化学
化学
电极
复合材料
有机化学
物理化学
复合数
工程类
作者
Shangyan Zhou,Shaojie Deng,Zhengcheng Wang,Wei Liao,Meida Chen,Qingmei Wang
出处
期刊:Energy & Fuels
[American Chemical Society]
日期:2021-12-01
卷期号:35 (24): 20300-20308
被引量:9
标识
DOI:10.1021/acs.energyfuels.1c03305
摘要
Exploiting advanced electrocatalysts for the sluggish oxygen reduction reaction (ORR) of the cathode is greatly crucial for proton-exchange membrane fuel cell (PEMFC) commercial application but still exhibit a significant challenge, especially the stability issues that have drawn attractive attention. Therefore, we introduced a nitrogen-doped carbon layer into the Pt/C surface, which not only prevents aggregation of Pt nanoparticles but also endows the electrocatalyst with enhanced performance without hiding the internal Pt active sites. The accelerated durability tests show an ignorable ORR activity loss (10 mV) in the as-prepared Pt/C@NC-0.06 sample compared to the pristine Pt/C catalyst (37 mV) after 5000 cyclic voltammetry cycles. Furthermore, in comparison to the pristine Pt/C catalyst (0.28 mA cm–2), the as-obtained Pt/C@NC-0.06 sample exhibits 2.32-fold improvement for the specific activity. The enhanced ORR properties of the Pt/C@NC-X catalyst in this work supplies a promising way to facilitate the electrocatalytic performance of catalysts in PEMFCs.
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