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Robust Cathode for Efficient CO2 Electrolysis Driven by Entropy Engineering in Solid Oxide Electrolysis Cells
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DOI：10.1021/acsenergylett.4c01447.png)
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摘要
En 中文
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 Pr1/2Ba1/2FeO3-delta (PBF) matrix are synthesized, and their physicochemical properties and electrochemical performances in CO2 reduction reaction process are explored via manipulating S-config. Notably, a high-entropy perovskite, Pr1/6La1/6Sm1/6Ba1/6Sr1/6Ca1/6FeO3-delta (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 CO2 adsorption capability, and rapid O2-/e(-) conductions. Compared to bare PBF perovskite, PLSBSCF offers a greater number of active sites for CO2RR, and the corresponding cell achieves remarkably high current densities of 2.86 A cm(-2) at 850 degrees C (1.5 V) during direct CO2 electrolysis, while maintaining good thermal stability and operational durability. Density Functional Theory calculations also confirm the good CO2 reduction activity of PLSBSCF perovskite.
Keyword:
ELECTROCATALYTIC ACTIVITY
DOUBLE PEROVSKITE
NI
PERFORMANCE
TITANATE
ANODE
期刊
IF:
18.2
论文数:
5.2K
被引数:
6.6W
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