Tailoring Ion Ordering in Perovskite Oxide for High‐Temperature Oxygen Evolution Reaction

Author:

Liu Qingxue12,Shen Feiran34,Song Guohui15,Liu Tianfu1,Feng Weicheng12,Li Rongtan12,Zhang Xiaomin1,Li Mingrun1,He Lunhua367,Zheng Xu8,Yin Shuaishuai8,Yin Guangzhi8,Song Yuefeng1,Wang Guoxiong1ORCID,Bao Xinhe1

Affiliation:

1. State Key Laboratory of Catalysis Dalian National Laboratory for Clean Energy Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 China

2. College of Energy University of Chinese Academy of Sciences Beijing 100039 China

3. Spallation Neutron Source Science Center Dongguan 523803 China

4. Institute of High Energy Physics Chinese Academy of Sciences Beijing 100049 China

5. College of Environmental and Chemical Engineering Dalian Jiaotong University Dalian 116028 China

6. Institute of Physics Chinese Academy of Sciences Beijing 100190 China

7. Songshan Lake Materials Laboratory Dongguan 523808 China

8. Shanghai Synchrotron Radiation Facility (SSRF) Shanghai Advanced Research Institute Chinese Academy of Sciences Shanghai 201800 China

Abstract

AbstractPerovskites 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 PrBaCo2−xFexO5+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 PrBaCo2O5+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.

Funder

National Key Research and Development Program of China

National Natural Science Foundation of China

Publisher

Wiley

Subject

General Medicine

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