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Fabrication of excellent bifunctional electrocatalyst FeNi-LDH@L-NiCoP using ZIF as a sacrifice template for alkaline electrolysis of water.

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Title: Fabrication of excellent bifunctional electrocatalyst FeNi-LDH@L-NiCoP using ZIF as a sacrifice template for alkaline electrolysis of water.
Authors: Zhang, Boxuan1,2, Cui, Jinxing1,2,3 cuijinxing200@163.com, Li, Zhifang2,3, Yang, Changlong1,2,3 changlongy@163.com, Dong, Weiwei1,2, Li, Ke1,2
Source: Molecular Catalysis. May2025, Vol. 579, pN.PAG-N.PAG. 1p.
Subjects: Layered double hydroxides, Bifunctional catalysis, Water electrolysis, Charge transfer, Crystallization
Abstract: • FeNi-LDH@L-NCP/NF was synthesized by using L-Co-ZIF as a template. • FeNi-LDH@L-NCP/NF exhibited superior bifunctional OER/HER catalytic performances. • Enhancing charge transfer between L-NCP and FeNi-LDH boosts the kinetics of HER and OER reactions The key to generating hydrogen by electrolysis of water is to design the low-cost and high-catalytic activity catalyst. In this paper, FeNi-Layered Double Hydroxide@L-NCP/nickel foam (FeNi-LDH@L-NCP/NF) is prepared using leaf-like zeolitic imidazolate framework (L-Co-ZIF) as the precursor, phosphating to produce NiCoP (denoted as L-NCP) and then growing FeNi layered double hydroxide (FeNi-LDH) through a hydrothermal crystallization method. FeNi-LDH@L-NCP/NF is an exceptional catalyst for hydrogen evolution reaction (HER) as well as oxygen evolution reaction (OER). It shows the low overpotential of FeNi-LDH@L-NCP/NF and the values are 106 and 220 mV at 10 mA·cm-2 in 1 M KOH for HER and OER, respectively. This is because the more ordered L-NCP is formed due to the role of the ZIF templates, which favors rapid charge transfer between the electrolyte and the electrode, thereby promoting its catalytic performance. The synergistic effect of FeNi-LDH and L-NCP also contributes to activity. In this paper, The FeNi-LDH@L-NCP/NF catalyst is obtained through a hybrid strategy by loading FeNi-LDH prepared via hydrothermal method onto the prepared MOF-derived L-NCP. Both NiCoP nanosheets grown vertically on NF and FeNi-LDH graded nanosheets can supply significant abundant active sites for HER and OER. The unique double-layer structure of FeNi-LDH and the network structure of L-NCP constitute a unique three-dimensional interface, which constitutes an efficient mass transfer channel and promotes charge transfer to further improve conductivity. [Display omitted] [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
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Abstract:• FeNi-LDH@L-NCP/NF was synthesized by using L-Co-ZIF as a template. • FeNi-LDH@L-NCP/NF exhibited superior bifunctional OER/HER catalytic performances. • Enhancing charge transfer between L-NCP and FeNi-LDH boosts the kinetics of HER and OER reactions The key to generating hydrogen by electrolysis of water is to design the low-cost and high-catalytic activity catalyst. In this paper, FeNi-Layered Double Hydroxide@L-NCP/nickel foam (FeNi-LDH@L-NCP/NF) is prepared using leaf-like zeolitic imidazolate framework (L-Co-ZIF) as the precursor, phosphating to produce NiCoP (denoted as L-NCP) and then growing FeNi layered double hydroxide (FeNi-LDH) through a hydrothermal crystallization method. FeNi-LDH@L-NCP/NF is an exceptional catalyst for hydrogen evolution reaction (HER) as well as oxygen evolution reaction (OER). It shows the low overpotential of FeNi-LDH@L-NCP/NF and the values are 106 and 220 mV at 10 mA·cm-2 in 1 M KOH for HER and OER, respectively. This is because the more ordered L-NCP is formed due to the role of the ZIF templates, which favors rapid charge transfer between the electrolyte and the electrode, thereby promoting its catalytic performance. The synergistic effect of FeNi-LDH and L-NCP also contributes to activity. In this paper, The FeNi-LDH@L-NCP/NF catalyst is obtained through a hybrid strategy by loading FeNi-LDH prepared via hydrothermal method onto the prepared MOF-derived L-NCP. Both NiCoP nanosheets grown vertically on NF and FeNi-LDH graded nanosheets can supply significant abundant active sites for HER and OER. The unique double-layer structure of FeNi-LDH and the network structure of L-NCP constitute a unique three-dimensional interface, which constitutes an efficient mass transfer channel and promotes charge transfer to further improve conductivity. [Display omitted] [ABSTRACT FROM AUTHOR]
ISSN:24688231
DOI:10.1016/j.mcat.2025.115052