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Updated: Jun 23, 2025
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Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production
Published on: December 6, 2021
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Carbon-coated cobalt molybdenum oxide as a high-performance electrocatalyst for hydrogen evolution reaction
Ning Xu1, Guoxuan Cao1, Liyong Gan1
1School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, PR China.
International Journal of Hydrogen Energy
|June 25, 2024
Summary
Developing efficient, low-cost catalysts for the hydrogen evolution reaction (HER) is key for water splitting. This study optimized a cobalt-molybdenum-oxide nanocatalyst by controlling surface hydroxides with carbon coating, achieving superior HER performance and durability.
Area of Science:
- Electrochemistry and Materials Science
- Catalysis for Energy Conversion
Background:
- High-performance, cost-effective catalysts are crucial for electrochemical water-splitting.
- Surface hydroxides on non-precious metal catalysts (Co, Ni) enhance hydrogen evolution reaction (HER) performance in alkaline media.
- Systematic studies on the role of these hydroxides in catalytic mechanisms are limited.
Purpose of the Study:
- To investigate the correlation between surface hydroxide formation and electrocatalytic performance in Co-Mo-O nanocatalysts.
- To optimize HER activity and durability by controlling hydroxide content.
- To elucidate the role of hydroxides in the catalytic mechanism using first-principles calculations.
Main Methods:
- Synthesis and characterization of Co-Mo-O nanocatalysts.
- Surface modification via carbon shell coating to moderate hydroxide formation.
- Electrocatalytic performance testing for the hydrogen evolution reaction (HER) in alkaline environments.
- First-principles calculations to study active sites and hydroxide influence.
Main Results:
- A direct correlation was established between the amount of surface hydroxides and the HER electrocatalytic performance of Co-Mo-O nanocatalysts.
- Carbon coating effectively moderated surface hydroxide formation, optimizing catalytic properties.
- The developed carbon-coated Co-Mo-O nanocatalyst (Co-Mo-O@C/NF) exhibited excellent HER activity and durability in alkaline media.
Conclusions:
- Controlling surface hydroxide formation is a viable strategy to enhance non-precious metal HER catalysts.
- The carbon-coated Co-Mo-O nanocatalyst represents a highly efficient and durable non-precious metal catalyst for the hydrogen evolution reaction.
- First-principles calculations provide insights into the active sites and the beneficial role of hydroxides in the catalytic process.
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