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Related Experiment Video

Updated: Sep 28, 2025

Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance

Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance

Published on: April 27, 2018

Overdoping Strategy for Preparing a Two-Phase Oxide Electrocatalyst to Boost Oxygen Evolution Reaction.

Jian Cai¹, Wei Quan², Tianyi Chen²

¹Department of Physics, College of Sciences & Institute for Sustainable Energy, Shanghai University, Shanghai, 200444, P. R. China.

Chemistry, an Asian Journal

|March 28, 2022

Summary

This summary is machine-generated.

This study developed a novel two-phase oxide electrocatalyst, SrCo_0.9 Fe_0.05 Mo_0.35 O_x (SCFM_0.35), for efficient oxygen evolution reactions. The catalyst exhibits excellent activity and stability in alkaline solutions, outperforming single-phase and undoped perovskites.

Keywords:

Cobalt oxide Double perovskite Electrocatalysis Oxygen evolution reaction two-phase

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Area of Science:

Materials Science
Electrochemistry
Catalysis

Background:

The oxygen evolution reaction (OER) is crucial for hydrogen production and fuel cells, but faces challenges with catalyst cost, efficiency, and stability.
Non-precious metal oxides offer unique advantages as catalysts for OER.

Purpose of the Study:

To develop a highly active and stable non-precious metal oxide electrocatalyst for the oxygen evolution reaction.
To investigate the effect of an overdoping strategy on perovskite catalyst structure and performance.

Main Methods:

Synthesis of a two-phase oxide electrocatalyst, SrCo_0.9 Fe_0.05 Mo_0.35 O_x (SCFM_0.35), containing double perovskite and Co₃ O₄ using an overdoping strategy.
Electrochemical characterization of the catalyst's activity and stability in alkaline solution, including overpotential measurements and accelerated stability tests (1000 CV cycles).

Main Results:

The SCFM_0.35 catalyst achieved a current density of 10 mA cm^-2 at an overpotential of 361.7 mV.
The catalyst demonstrated excellent stability, with only a 3.48% performance degradation after 1000 CV cycles.
Electrochemical performance was superior to single-phase double perovskites and undoped perovskites.

Conclusions:

Overdoping SrCo_0.9 Fe_0.1 O₃ (SCF) with molybdenum (Mo) transforms it into a double perovskite structure with precipitated Co₃ O₄.
This process induces lattice distortion and beneficial changes in surface electronic structure, morphology, and cobalt valence state, enhancing the OER microenvironment and catalytic performance.