Orthorhombic Y0.95-xSrxCo0.3Fe0.7O3-δ anode for oxygen evolution reaction in solid oxide electrolysis cells

Weicheng Feng; Yuefeng Song; Tianfu Liu; Jingwei Li; Xiaomin Zhang; Junhu Wang; Guoxiong Wang; Xinhe Bao

Fundamental Research (Jul 2021)

Orthorhombic Y0.95-xSrxCo0.3Fe0.7O3-δ anode for oxygen evolution reaction in solid oxide electrolysis cells

Weicheng Feng,
Yuefeng Song,
Tianfu Liu,
Jingwei Li,
Xiaomin Zhang,
Junhu Wang,
Guoxiong Wang,
Xinhe Bao

Affiliations

Weicheng Feng: State Key Laboratory of Catalysis, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Liaoning 116023, China; College of Energy, University of Chinese Academy of Sciences, Beijing 100039, China
Yuefeng Song: State Key Laboratory of Catalysis, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Liaoning 116023, China
Tianfu Liu: State Key Laboratory of Catalysis, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Liaoning 116023, China; College of Energy, University of Chinese Academy of Sciences, Beijing 100039, China
Jingwei Li: State Key Laboratory of Catalysis, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Liaoning 116023, China
Xiaomin Zhang: State Key Laboratory of Catalysis, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Liaoning 116023, China
Junhu Wang: Center for Advanced Mössbauer Spectroscopy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Liaoning 116023, China
Guoxiong Wang: State Key Laboratory of Catalysis, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Liaoning 116023, China; Corresponding author.
Xinhe Bao: State Key Laboratory of Catalysis, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Liaoning 116023, China

Journal volume & issue: Vol. 1, no. 4
pp. 439 – 447

Abstract

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Cubic perovskite oxides usually suffer from delamination and Sr2+ segregation for catalyzing oxygen evolution reaction (OER) at the anodes of solid oxide electrolysis cells (SOECs). It is crucial to develop alternative and efficient anode materials for SOECs. Herein, a series of novel Y0.95-xSrxCo0.3Fe0.7O3-δ (YSCF-x) orthorhombic perovskite oxides in the Pnma (62) space group are synthesized as anode materials of SOECs. Physicochemical characterizations and density functional theory calculations reveal that the partial substitution of Y3+ by Sr2+ increases the oxygen vacancy concentration and mobility as well as improves the electrical conductivity, which contributes to the excellent OER activity of YSCF-x. At 800 °C, the current density of SOEC with YSCF-0.05-Ce0.8Sm0.2O2-δ anode can reach 1.32 A cm−2 at 1.6 V, about twice that of SOEC with Y0.95Co0.3Fe0.7O3-δ-Ce0.8Sm0.2O2-δ anode. This work paves a new avenue for the design of advanced anode materials of SOECs.

Published in Fundamental Research

ISSN: 2667-3258 (Online)
Publisher: KeAi Communications Co. Ltd.
Country of publisher: China
LCC subjects: Science: Science (General)
Website: https://www.keaipublishing.com/en/journals/fundamental-research/

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