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Updated: Jun 9, 2025
A Simple, Low-cost, and Robust System to Measure the Volume of Hydrogen Evolved by Chemical Reactions with Aqueous Solutions
Published on: August 17, 2016
Accelerated water dissociation kinetics by nickel-nickelous hydroxide epitaxial interfaces for superior alkaline
Yafei Cheng1, Yanlong Li1, Zhenyu Qiao1
1School of Materials Engineering, Changshu Institute of Technology, Changshu, Jiangsu 215500, China.
Abstract:
The intrinsic performance of an electrocatalyst can be reinforced by constructing appropriate epitaxial interfaces, where the modulated electronic states and adsorption/desorption behaviors are conductive to enhancing electrocatalytic activity. Herein, nickel-nickelous hydroxide epitaxial interface supported on nickel foam (Ni-Ni(OH)2/NF) with epitaxial growth of nickel nanoparticles on the surface of nickelous hydroxide nanoribbons is devised for alkaline hydrogen evolution reaction (HER). Notably, the Ni-Ni(OH)2/NF reveals excellent electrocatalytic activity of alkaline HER (158 mV @ 100 mA cm-2), along with robust stability (90 % activity retention after 150 h continuous test at 200 mA cm-2). Theoretical simulations disclose the tuned interface electronic structure and accelerated water dissociation around the epitaxial nickel-nickelous hydroxide interface result in efficient electrochemical activity toward alkaline hydrogen evolution.
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