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Fe-doped 3D flower-like NiCo-LDH for enhanced OER performance
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DOI：10.1007/s11581-026-07064-3.png)
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Abstract
En 中文
Water electrolysis is a crucial technology for renewable energy conversion and storage, yet its progress is hindered by high overpotentials. The development of cost-effective, stable, non-precious metal catalysts with high activity is essential. In this study, a 3D flower-like NiCo-layered double hydroxide (LDH) structure is synthesized via a hydrothermal method, followed by Fe3+ doping through FeCl(3)6H(2)O etching to produce Fe-doped NiCo-LDH (NCF-LDH). Under alkaline conditions, the NCF-LDH electrode demonstrates remarkable electrocatalytic performance for the oxygen evolution reaction (OER), attaining low overpotential of 263 mV at the current density of 50 mA cm(- 2) and a Tafel slope of 71.9 mV dec(- 1), accompanied by exceptional operational stability. The enhanced catalytic performance results from the synergistic effects of the 3D flower-like architecture, which provides a large specific surface area, exposing abundant active sites and promoting efficient charge transfer. Additionally, the Fe3+ induced lattice distortion and generation of vacancies disrupt the atomic arrangement, creating defect-rich sites that enhance OER activity.
Keywords:
NiCo-layered double hydroxide
Hierarchical structure
Catalyst
Water splitting
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