Rhodium Nanoparticle-Supported Graphitic Carbon-Encapsulated Nickel Metal Core Electrocatalyst via Pulsed Laser Ablation for Hydrogen Evolution Reaction

W4412724885 · 수집 2026-10-04 18:16:38

T10030 Electrocatalysts for Energy Conversion

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The hydrogen evolution reaction (HER) in acidic media exhibits high reaction rates but is often hindered by stability challenges under corrosive conditions. In this study, we introduce a novel approach to synthesizing nickel nanoparticles encapsulated in nitrogen-doped carbon layers decorated with noble metals (Ir and Rh), with the aim of improving catalytic activity, durability, and conductivity for HER applications. Using a two-step pulsed laser ablation and irradiation process, this environmentally friendly synthesis facilitates the rapid production of Rh- and Ir-decorated Ni@GC composites with robust metal-support interactions. The resulting catalysts exhibit outstanding HER performance in 0.5 M H2SO4 acidic electrolyte, achieving a current density of 46 mV at 10 mA cm-2 with a low Tafel slope of 36 mV dec-1. The optimized Rh-Ni@GC electrocatalyst showed long stability results over 24 h using a chronoamperometry test. This work demonstrates a sustainable and effective method for developing high-performance electrocatalysts for hydrogen production.

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