Nanomaterials, Journal Year: 2025, Volume and Issue: 15(4), P. 294 - 294

Published: Feb. 14, 2025

Electrocatalytic water splitting is a critical approach for achieving carbon neutrality, playing an essential role in clean energy conversion. However, the slow kinetics of oxygen evolution reaction (OER) remains major bottleneck hindering conversion efficiency. Although noble metal catalysts (e.g., IrO2 and RuO2) show excellent catalytic activity, their high cost scarcity limit applicability large-scale industrial processes. In this study, we introduce novel electrocatalyst based on selenized NiFe-layered double hydroxides (NiFe-LDHs), synthesized via simple hydrothermal method. Its key innovation lies selenization process, during which Ni atoms lose electrons to form selenides, while selenium (Se) gains electrons. This leads significant increase concentration high-valent ions, enhances electronic mobility, improves structural stability catalyst through formation Ni-Se bonds. Experimental results that NiFe-LDHs exhibit electrocatalytic performance 1 M KOH alkaline solution. (OER), achieved ultra-low overpotential 286 mV at current density 10 mA cm⁻2, with Tafel slope 63.6 dec⁻1. After 60 h continuous testing, showed almost no degradation, far outperforming conventional catalysts. These highlight potential NiFe-LDH@selenized electrolysis applications, providing effective solution efficient sustainable production.

Language: Английский