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Updated: Oct 3, 2025

Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production

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

Iron-doped cobalt oxide nanoarray for efficient electrocatalytic nitrate-to-ammonia conversion.

Peipei Wei¹, Jie Liang¹, Qian Liu²

¹Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan 610054, China.

Journal of Colloid and Interface Science

|February 14, 2022

Summary

This study presents Fe-doped Co3O4 nanoarray as an efficient catalyst for electrochemical nitrate reduction reaction (NO3RR) to produce ammonia (NH3) under ambient conditions, offering a cost-effective alternative to noble metals.

Keywords:

Density functional theory Fe-doped Co(3)O(4)NH(3) production Nitrate reduction reaction

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Last Updated: Oct 3, 2025

Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production

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Area of Science:

Electrochemistry
Materials Science
Catalysis

Background:

Electrochemical nitrate reduction reaction (NO3RR) is a promising route for ammonia (NH3) synthesis.
Noble metal catalysts offer good performance but are limited by cost and availability.
Developing cost-effective and efficient catalysts is crucial for industrial applications.

Purpose of the Study:

To investigate Fe-doped Co3O4 nanoarray as a catalyst for NO3RR to NH3 production.
To evaluate the catalytic performance, including NH3 yield and Faradaic efficiency.
To understand the mechanism of NO3RR on the Fe-doped Co3O4 catalyst.

Main Methods:

Synthesis of Fe-doped Co3O4 nanoarray.
Electrochemical characterization of the catalyst for NO3RR.
Density functional theory (DFT) calculations to elucidate the reaction mechanism.

Main Results:

Fe-doped Co3O4 nanoarray demonstrated efficient catalysis for NO3RR to NH3 in neutral conditions.
Achieved a high NH3 yield of 0.624 mg mg(cat.)(-1)h(-1) and Faradaic efficiency of 95.5% at -0.7 V vs RHE.
The catalyst exhibited good stability for NO3RR.

Conclusions:

Fe-doped Co3O4 nanoarray is a highly effective and stable catalyst for electrochemical NH3 production via NO3RR.
DFT calculations suggest favorable NO3- adsorption on Fe-doped Co3O4, facilitating NH3 synthesis.
This finding offers a cost-effective alternative to noble metal catalysts for ammonia production.