Related Experiment Video
Updated: Jun 7, 2026
Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques
Published on: November 11, 2013
Preparation and Electrochemical Performance of Macroporous High-Entropy Perovskite Oxide
Fan Wang1, Xin Ouyang2, Zhen Pei2
1College of Materials and Chemistry, China Jiliang University, Hangzhou 310018, China.
Abstract:
High-entropy oxides have demonstrated considerable potential for application in the field of nonprecious metal electrocatalysis owing to their distinctive structural and compositional advantages. Herein, macroporous monoliths of La(Fe0.25Ni0.25Co0.25Mn0.25Cr0.25)O3 high-entropy perovskite oxide are prepared via a sol-gel process combined with phase separation and subsequent calcination. By precisely tuning the amounts of propylene oxide (PO) and poly(acrylic acid) (PAA), along with a water/glycerol ratio, xerogels featuring interconnected macropores and cocontinuous frameworks are acquired. After calcination, high-entropy perovskite oxides of high purity and superior structural stability are obtained. As synthesized macroporous La(Fe0.25Ni0.25Co0.25Mn0.25Cr0.25)O3 calcined at 1000 °C demonstrates exceptional oxygen evolution reaction (OER) catalytic activities under alkaline conditions, with an overpotential of 348 mV at 100 mA cm-2 and a Tafel slope of 42.2 mV dec-1, surpassing commercial IrO2 under identical testing environment. This work offers interesting insights into the rational design of stable and effective high-entropy perovskite OER catalytic materials.
