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Updated: Jun 25, 2025
09:02
Manganese Oxide Nanoparticle Synthesis by Thermal Decomposition of ManganeseII Acetylacetonate
Published on: June 18, 2020
13.1K
Amorphous MnRuOx Containing Microcrystalline for Enhanced Acidic Oxygen-Evolution Activity and Stability.
Jingjing Zhang1,2, Liangliang Xu3, Xiaoxuan Yang4
1State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, CAS, Dalian, 116023, Liaoning, China.
Angewandte Chemie (International Ed. in English)
|May 31, 2024
Summary
A new hybrid manganese ruthenium oxide (MnRuOx) catalyst shows high activity and stability for the oxygen evolution reaction (OER). This advanced catalyst offers a promising alternative to iridium for water electrolyzers.
Area of Science:
- Materials Science
- Electrochemistry
- Catalysis
Background:
- Ruthenium (Ru)-based catalysts are active but unstable for oxygen evolution reaction (OER) in acidic media.
- Iridium (Ir) is the benchmark but expensive and scarce.
Purpose of the Study:
- Develop a stable and active OER catalyst to replace Ir.
- Investigate a hybrid manganese ruthenium oxide (MnRuOx) catalyst with amorphous/crystalline heterostructures.
Main Methods:
- Synthesized MnRuOx catalysts via annealing at different temperatures.
- Characterized catalyst structure and composition.
- Evaluated OER activity and stability electrochemically.
Main Results:
- MnRuOx-300 exhibited an optimal amorphous/crystalline heterostructure.
- This heterostructure provided defects and active sites for efficient OH- adsorption/conversion.
- The catalyst demonstrated high activity and stability for OER, with reduced charge transfer resistance.
Conclusions:
- The hybrid MnRuOx catalyst with an optimal heterostructure is a promising alternative to Ir for OER.
- The amorphous/crystalline interface facilitates electron transfer and enhances catalytic performance.
- This work offers a potential solution for efficient water electrolysis.
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