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Co3Mo3N-An efficient multifunctional electrocatalyst.

Yao Yuan1,2, Samira Adimi1, Tiju Thomas3

  • 1Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, China.

Innovation (Cambridge (Mass.))
|September 24, 2021
PubMed
Summary

A new single-phase porous cobalt-molybdenum nitride (Co3Mo3N) acts as an efficient electrocatalyst for oxygen evolution (OER), oxygen reduction (ORR), and hydrogen evolution (HER) reactions, offering a durable and cost-effective alternative to precious metals.

Keywords:
multifunctional electrocatalystsrechargeable Zn-air batteriesternary nitrideswater splitting

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Catalysis

Background:

  • Precious metal electrocatalysts are essential for sustainable energy devices but lack multifunctionality and performance across diverse reactions.
  • Existing multifunctional catalysts are often complex hybrid materials, limiting scalability and cost-effectiveness.

Purpose of the Study:

  • To develop a single-phase, cost-effective, and multifunctional electrocatalyst for key energy conversion reactions.
  • To investigate the catalytic activity and durability of porous cobalt-molybdenum nitride (Co3Mo3N) in alkaline media.

Main Methods:

  • Facile synthesis of single-phase porous Co3Mo3N.
  • Electrochemical evaluation of Co3Mo3N for oxygen evolution reaction (OER), oxygen reduction reaction (ORR), and hydrogen evolution reaction (HER).
  • Performance testing in practical applications like zinc-air batteries and water-splitting electrolyzers.

Main Results:

  • Co3Mo3N demonstrated outstanding OER, ORR, and HER activity and durability, comparable to commercial RuO2 and Pt/C catalysts.
  • The material exhibited high specific capacity in zinc-air batteries and low overpotential in water-splitting electrolyzers.
  • The synergistic effect of Co and Mo d-states and a cobalt oxide-rich surface layer contributed to the observed catalytic performance.

Conclusions:

  • Single-phase porous Co3Mo3N is a highly efficient and reliable multifunctional electrocatalyst for sustainable energy conversion.
  • This bimetallic nitride offers a promising, cost-effective alternative to precious metal catalysts, enabling scalable electrochemical energy devices.