2025/05/19 by Caio Machado Fernandes, Fernandes, Caio Machado, Odivaldo C. Alves +10
Chemical Engineering · #Ammonia Synthesis and Nitrogen Reduction #Chemical Physics (physics.chem-ph) #FOS: Physical sciences
paper · pdf · doi:10.48550/arxiv.2505.13759
openalex publication_date 2025/05/19 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Ammonia poses significant environmental challenges due to its role in water pollution, contributing to eutrophication and several detrimental environmental and ecological issues. Addressing the efficient removal or conversion of ammonia is, therefore, critical. Among various methods, the ammonia electro-oxidation reaction stands out due to its potential for direct energy conversion and environment remediation. Here, we synthesize platinum-iron oxide magnetic nanoparticles (Pt-MNP) as electrocatalysts and apply an alternating magnetic field (AMF) to enhance their activity.. The AMF generates localized heat via Néel relaxation, accelerating ammonia oxidation kinetics at the catalytic surface.. Compared to conventional electro-oxidation methods, this technique demonstrates superior efficiency and stability, offering a promising alternative for ammonia treatment. This work uses the concept of MagnetoElectroCatalysis, showcasing the synergy between magnetic fields and the electrochemical process, leveraging the AMF to induce localized heating within the nanocatalyst, thereby improving its catalytic activity as shown in cyclic voltammetry and chronoamperometry experiments. By combining nanocatalyst design with innovative AMF application, this study provides a new avenue for enhancing electrochemical reactions, with broad implications for environmental remediation and sustainable energy solutions.