2025/05/10 by Nadira Meethale Palakkool, Palakkool, Nadira Meethale, Mike P. C. Taverne +19
Energy · Engineering · Materials Science · #Advanced battery technologies research #Chemical Physics (physics.chem-ph) #Corrosion Behavior and Inhibition #Electrocatalysts for Energy Conversion #FOS: Physical sciences
paper · pdf · doi:10.48550/arxiv.2505.06627
openalex publication_date 2025/05/10 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
This study presents a three-dimensional electrode for hydrogen evolution reaction (HER), tackling challenges in corrosion resistance, catalytic activity, and durability. The electrode features a rod-connected diamond structure made of pyrolytic carbon (PyC), with sequential Ni and CN conformal coatings, resulting in an increase of its electrochemical active surface area more than 80 times their geometric surface area, marking the first application of CN/Ni/RCD-PyC electrodes for HER. The CN layer enhances corrosion resistance under acidic and alkaline conditions, while synergizing with Ni boosts catalytic activity. We demonstrate that the CN/Ni/RCD-PyC electrode exhibited superior HER activity, achieving lower overpotentials of 0.6 V and 0.4 V for a current density of \mathrm10~mA⋅ cm-2 in acidic and alkaline media, respectively. The electrode demonstrates excellent durability with performance over 2000 cycles of cyclic voltammetry at high scan rates with no significant decay. Therefore, this electrode offers a scalable, cost-effective solution for sustainable hydrogen production.