AccScience Publishing / EER / Online First / DOI: 10.36922/EER025170033
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ORIGINAL RESEARCH ARTICLE

Nickel foam-supported nickel–cobalt layered double hydroxide/platinum composite electrocatalyst for ammonia oxidation reaction

Xinyu Zhao1 ,  Xinyue Wang1* ,  Hongli Cai1 ,  Jialu Liu1 ,  Jiali Gu1 ,  Yingying Zhao1 ,  Liang Zhang1*
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1 Department of Chemistry, College of Chemistry and Materials Engineering, Bohai University, Jinzhou, Liaoning, China
EER, 025170033 https://doi.org/10.36922/EER025170033
Received: 23 April 2025 | Revised: 6 June 2025 | Accepted: 9 June 2025 | Published online: 30 June 2025
© 2025 by the Author(s). This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution 4.0 International License ( https://creativecommons.org/licenses/by/4.0/ )
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Abstract

With increasing interest in direct ammonia fuel cells, designing and developing high-activity electrocatalysts for the electrochemical ammonia oxidation reaction has become a critical research focus. In this work, a nickel foam-supported nickel–cobalt layered double hydroxide/platinum composite (Pt-NiCo-LDH) was synthesized through electrochemical deposition and displacement reactions for enhanced electrocatalytic activity. Key synthesis parameters, including reaction temperature and chloroplatinic acid hexahydrate (H2PtCl6.6H2O) concentration, were systematically optimized. Electrochemical characterization using cyclic voltammetry revealed that the optimal catalyst – synthesized in a solution containing 450 μL deionized water and 1,050 μL 0.1 moL/L H2PtCl6·6H2O at 20°C for 8 h – showed an oxidation peak current of 154.60 mA and a low onset potential of −0.38 V (versus mercury/mercury oxide), indicating exceptional catalytic activity. The support of nickel foam provided favorable conditions to deposit NiCo-LDH nanowires, providing sites for the growth of platinum nanoparticles, thus promoting the catalytic activity of the Pt-(NiCo-LDH) electrocatalyst.

Keywords
Electrocatalyst
Ammonia oxidation reaction
Nanocomposite
Platinum
Nickel–cobalt layered double hydroxide
Funding
This work was supported by the Innovation Training Program for College Students of Bohai University (202410167039).
Conflict of interest
The authors declare that they have no competing interests.
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Explora: Environment and Resource, Electronic ISSN: 3060-9046 Published by AccScience Publishing
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