析氧
电催化剂
钙钛矿(结构)
氧气
化学
材料科学
化学工程
无机化学
电化学
结晶学
物理化学
电极
有机化学
工程类
作者
Fatma Abdelghafar,Xiaomin Xu,San Ping Jiang,Zongping Shao
标识
DOI:10.1002/cssc.202301534
摘要
The development of advanced electrolysis technologies such as anion exchange membrane water electrolyzer (AEMWE) is central to the vision of a sustainable energy future. Key to the realization of such AEMWE technology lies in the exploration of low‐cost and high‐efficient catalysts for facilitating the anodic oxygen evolution reaction (OER). Despite tremendous efforts in the fundamental research, most of today’s OER works are conducted under room temperature, which deviates significantly with AEMWE’s operating temperature (50–80 °C). To bridge this gap, it is highly desirable to obtain insights into the OER catalytic behavior at elevated temperatures. Herein, using the well‐known perovskite catalyst Ba0.5Sr0.5Co0.8Fe0.2O3−δ (BSCF) as a proof of concept, the effect of temperature on the variation in OER catalytic activity and stability is evaluated. It is found that the BSCF’s activity increases with increasing temperature due to enhanced lattice oxygen participation promoting the lattice oxygen‐mediated OER process. Further, surface amorphization and cation leaching of BSCF become more pronounced as temperature increases, causing a somewhat attenuated OER stability. These new understandings of the fundamental OER catalysis over perovskite materials at industrial‐relevant temperature conditions are expected to have strong implications for the research of OER catalysts to be deployed in practical water electrolyzers.
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