DataVXACS Energy LettersPaper
journal article·2024-08-09

Robust Cathode for Efficient CO2 Electrolysis Driven by Entropy Engineering in Solid Oxide Electrolysis Cells

Meiting Yang, Shuai Liu, Xinran Shen, Ruijia Xu, Jiangyuan Feng, Zhixin Luo, Guangming Yang, Yu Liu, Ran Ran, Wei Zhou, Zongping Shao

ACS Energy Letters· Volume 9· Issue 8
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Source abstract

Abstract

Herein, we introduce an innovative approach of entropy engineering to design high-performance and durable electrodes. A series of perovskite oxides with varying configurational entropy ( S config ) based on Pr 1/2 Ba 1/2 FeO 3−δ (PBF) matrix are synthesized, and their physicochemical properties and electrochemical performances in CO 2 reduction reaction process are explored via manipulating S config . Notably, a high-entropy perovskite, Pr 1/6 La 1/6 Sm 1/6 Ba 1/6 Sr 1/6 Ca 1/6 FeO 3−δ (PLSBSCF), with an S config of 1.79 R, exhibits significant lattice distortion due to homogeneous distributed A-site elements. It demonstrates a high concentration of oxygen vacancies, good CO 2 adsorption capability, and rapid O 2– /e – conductions. Compared to bare PBF perovskite, PLSBSCF offers a greater number of active sites for CO 2 RR, and the corresponding cell achieves remarkably high current densities of 2.86 A cm –2 at 850 °C (1.5 V) during direct CO 2 electrolysis, while maintaining good thermal stability and operational durability. Density Functional Theory calculations also confirm the good CO 2 reduction activity of PLSBSCF perovskite.
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Research context

Energy storageElectronic materials

OpenAlex topics: Advancements in Solid Oxide Fuel Cells · Catalysis and Oxidation Reactions · Machine Learning in Materials Science

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 211816, China

Beijing Huairou Laboratory, No. 8 Yangyan East Road 1, Huairou District, Beijing 101400, China

WA School of Mines: Minerals, Energy and Chemical Engineering (WASM-MECE), Curtin University, Perth 6102, Western Australia, Australia

Energy Storage Research and Development Center, Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China

Nanjing Institute of Future Energy System, Institute of Engineering Thermophysics, Chinese Academy of Sciences, Nanjing 211100, China

Funding

Graduate Research and Innovation Projects of Jiangsu Province · National Key Research and Development Program of China · Natural Science Foundation of Jiangsu Province · Nanjing Tech University · National Natural Science Foundation of China · Chinese Academy of Sciences

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