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Updated: May 7, 2026

Simple Methods for the Preparation of Non-noble Metal Bulk-electrodes for Electrocatalytic Applications
Published on: June 21, 2017
Coordination-Mediated Heterogeneous Nucleation Enables Self-Supported Ni(OH)2/NiFe-LDH Electrodes for AEM Water
Xinyi Han1, Ziliang Deng1, Yongping Yang1
1School of Materials Science and Engineering, Beijing Institute of Technology, China.
Abstract:
Self-supported electrodes represent a promising anode architecture for anion exchange membrane water electrolyzers; however, their practical implementation is hindered by an insufficient understanding of their formation mechanisms and the consequently limited catalytic efficiency and stability. In this work, we developed a self-supported electrode comprising a composite catalyst of β-Ni(OH)2 and NiFe layered double hydroxide (LDH), grown on nickel felt (denoted as Ni(OH)2/NiFe-LDH/NFt) via a one-step hydrothermal process. We systematically investigated and clarified the role of NH4F in governing the synthesis of self-supported Ni(OH)2/NiFe-LDH/NFt. The coordination effect of F- with Fe3+ and etching effect of NH4 + on the surface oxide layer of nickel felt leads to favorable heterogeneous nucleation. Moreover, the etching effect provides an additional Ni source that favors the deposition of Ni(OH)2 on NiFe-LDH. However, excess NH4 + leads to the formation of Ni-based complex compounds in solution during the hydrothermal process and suppresses the deposition of Ni(OH)2. When applying as the Ni(OH)2/NiFe-LDH/NFt anode catalyst in practical anion exchange membrane water electrolysis, it requires only 1.81 V to deliver 1.0 A cm-2 and exhibits outstanding durability, with no noticeable performance decay after 750 h of continuous operation at 0.5 A cm-2.
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