析氧
钙钛矿(结构)
阳极
氧化物
电解
氧气
材料科学
离子
空位缺陷
工作(物理)
化学物理
化学工程
化学
热力学
物理化学
电极
电化学
结晶学
电解质
物理
冶金
有机化学
工程类
作者
Qingxue Liu,Fang Shen,Gonghua Song,Tian‐Fu Liu,Wenjie Feng,Rongtan Li,Xiaomin Zhang,Mingrun Li,Lunhua He,Xu Zheng,S.Y. Yin,Gen Yin,Yibing Song,Guoxiong Wang,Xinhe Bao
标识
DOI:10.1002/anie.202307057
摘要
Abstract Perovskites exhibit excellent high‐temperature oxygen evolution reaction (OER) activities as the anodes of solid oxide electrolysis cells (SOECs). However, the relationship between ion ordering and OER performances is rarely investigated. Herein, a series of PrBaCo 2− x Fe x O 5+ δ perovskites with tailored ion orderings are constructed. Physicochemical characterizations and density functional theory calculations confirm that the oxygen bulk migration and surface transport capacities as well as the OER activities are promoted by the A‐site cation ordering, but weakened by the oxygen vacancy ordering. Hence, SOEC with the A‐site‐ordered and oxygen‐vacancy‐disordered PrBaCo 2 O 5+ δ anode exhibits the highest performance of 3.40 A cm −2 at 800 °C and 2.0 V. This work sheds light on the critical role of ion orderings in the high‐temperature OER performance and paves a new way for screening novel anode materials of SOECs.
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