质子交换膜燃料电池
电催化剂
材料科学
阴极
电化学
化学工程
耐久性
燃料电池
纳米颗粒
催化作用
纳米技术
化学
电极
复合材料
有机化学
物理化学
工程类
作者
Fei Xiao,Qi Wang,Gui‐Liang Xu,Xueping Qin,Inhui Hwang,Chengjun Sun,Min Liu,Hua Wei,Hsiwen Wu,Shangqian Zhu,Jincheng Li,Jian‐Gan Wang,Yuanmin Zhu,Duojie Wu,Yuan Wei,Meng Gu,Khalil Amine,Minhua Shao
出处
期刊:Nature Catalysis
[Springer Nature]
日期:2022-06-02
卷期号:5 (6): 503-512
被引量:145
标识
DOI:10.1038/s41929-022-00796-1
摘要
Abstract Proton exchange membrane fuel cells convert hydrogen and oxygen into electricity without emissions. The high cost and low durability of Pt-based electrocatalysts for the oxygen reduction reaction hinder their wide application, and the development of non-precious metal electrocatalysts is limited by their low performance. Here we design a hybrid electrocatalyst that consists of atomically dispersed Pt and Fe single atoms and Pt–Fe alloy nanoparticles. Its Pt mass activity is 3.7 times higher than that of commercial Pt/C in a fuel cell. More importantly, the fuel cell with a low Pt loading in the cathode (0.015 mg Pt cm −2 ) shows an excellent durability, with a 97% activity retention after 100,000 cycles and no noticeable current drop at 0.6 V for over 200 hours. These results highlight the importance of the synergistic effects among active sites in hybrid electrocatalysts and provide an alternative way to design more active and durable low-Pt electrocatalysts for electrochemical devices.
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