电催化剂
氧化物
阴极
材料科学
氧气
极化(电化学)
钙钛矿(结构)
化学工程
无机化学
电极
电化学
化学
冶金
物理化学
工程类
有机化学
作者
Wei He,Xuelian Wu,Guangming Yang,Huangang Shi,Feifei Dong,Meng Ni
出处
期刊:ACS energy letters
[American Chemical Society]
日期:2017-01-09
卷期号:2 (2): 301-305
被引量:71
标识
DOI:10.1021/acsenergylett.6b00617
摘要
Solid oxide fuel cells (SOFCs) offer great promise as sustainable energy conversion devices due to their high chemical-to-electrical conversion efficiency, flexible fuel sources, and low pollutions. In recent years, much effort has been devoted to developing intermediate temperature SOFCs. Central to the devices is the availability of a highly effective electrocatalyst for oxygen reduction reaction with reduced temperature operation, especially below 600 °C. Here we present a novel B-site Y-doped perovskite-type oxide BaCo0.7Fe0.22Y0.08O3−δ (BCFY) with extremely low polarization resistances (e.g., 0.10 Ω cm2 at 550 °C), which is ascribed to high cubic symmetry structure and fast oxygen kinetics. The superior electrocatalytic activity and stability enable BCFY to be a promising cathode candidate toward the application of reduced temperature SOFCs.
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