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Updated: Jan 14, 2026
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
Fluorine-Modulated Hierarchical NiFeCo-LDHs for Efficient and Stable Bifunctional Water Splitting in Alkaline and
Zhipeng Su1, Boyao Zhang1, Yibo Wang1
1School of Materials Science and Engineering, Liaoning University of Technology, Jinzhou, 121001, P.R. China.
Abstract:
This work synthesized a hierarchical-structured nickel-iron-cobalt layered double hydroxide (NiFeCo-LDHs) with heterointerfaces via a controllable hydrothermal method. The ternary metal system optimized the charge transport pathways through atomic-level synergy specifically the multivalent synergy. Furthermore, the high electronegativity of fluorine modulated the electronic conduction kinetics of NiFeCo-LDHs. Electrochemical testing demonstrated that, Owing to Ni2+ doping and fluorine atom modulation of LDH interlayer spacing, the NiFeCo-LDHs exhibited significantly enhanced hydrogen evolution reaction (HER) performance in 1.0 M KOH electrolyte. The HER overpotential is 74.3 mV at a current density of -10 mA cm-2. As a bifunctional electrode, it required an OER overpotential of only 204.3 mV to achieve 10 mA cm-2, and its stability remains robust even after 12 h of cycling. Notably, the catalyst maintains impressive performance for both HER and OER in seawater environments.
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