P-071

Afaq Hassan

afaq.hassan@pg.edu.pl

Justyna Łuczak

Gdansk University of Technology, Poland

Enhanced Electrocatalytic Performance of NiB@NiCu(OH)₂/NF Electrode for Ammonia Oxidation Reaction

The development of highly active and stable electrocatalysts for the ammonia oxidation reaction (AOR) is essential for advancing energy conversion technologies. In this study, we present a novel NiB@NiCu(OH)₂/NF electrode, synthesized via a hydrothermal reaction. The influence of boron and copper incorporation, along with varied dip-coating cycles (5, 10, 15), was systematically evaluated. X-ray diffraction (XRD) and scanning electron microscopy (SEM) confirmed the successful formation of NiB and NiCu(OH)₂ phases with optimized structural and morphological properties. XPS analysis confirmed the presence of Ni²⁺/Ni³⁺ and Cu²⁺ species, indicating enhanced electronic interactions that contribute to superior catalytic activity. Electrochemical studies demonstrated that NiB10@NiCu(OH)₂/NF exhibited the highest current density of 247.81 mA/cm² at 1.55 V vs RHE and the lowest charge transfer resistance (Rct) of 0.334 Ω, confirming its enhanced conductivity and reaction kinetics. Tafel slope analysis suggested a Heyrovsky-like reaction mechanism, signifying a fast electron transfer process. The synergistic effect of boron incorporation, which strengthens the bonding of intermediates, and copper modification, which improves electronic conductivity, played a pivotal role in enhanced performance. These findings highlight NiB@NiCu(OH)₂/NF as a promising electrocatalyst for AOR, offering significant potential for energy and environmental applications.