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Hauptverfasser:	Yaohao Zhang, Zhaoju Yu, Wei Li, Chuanmu Tian, Marcus Einert, Jan P. Hofmann, Marcel Risch, Ralf Riedel
Format:	Artículo Open Access
Veröffentlicht:	Wiley 2026
Schlagworte:	ChemElectroChem
Online-Zugang:	https://chemistry-europe.onlinelibrary.wiley.com/doi/10.1002/celc.202500406
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author	Yaohao Zhang Zhaoju Yu Wei Li Chuanmu Tian Marcus Einert Jan P. Hofmann Marcel Risch Ralf Riedel
author_facet	Yaohao Zhang Zhaoju Yu Wei Li Chuanmu Tian Marcus Einert Jan P. Hofmann Marcel Risch Ralf Riedel Yaohao Zhang Zhaoju Yu Wei Li Chuanmu Tian Marcus Einert Jan P. Hofmann Marcel Risch Ralf Riedel
collection	Wiley Open Access
contents	Polymer‐Derived Nickel‐Iron Silicide‐Based Bimetallic Catalysts: Synthesis, Characterization, and Enhanced Catalytic Properties Toward the Oxygen Evolution Reaction Yaohao Zhang Zhaoju Yu Wei Li Chuanmu Tian Marcus Einert Jan P. Hofmann Marcel Risch Ralf Riedel ChemElectroChem The growing demand for green energy highlights the need for efficient hydrogen production through water splitting. Designing bimetallic electrocatalysts is crucial for this goal. Transition metal silicides are promising due to their abundance and high electrical conductivity. Here, a novel Ni 2 Si/Fe x Si y /SiOC composite was synthesized via a polymer‐derived ceramics (PDCs) route using a single‐source precursor (SSP). The SSP was prepared by modifying a high‐carbon polysiloxane (SPR‐684) with nickel and iron acetylacetonates. Fourier transform infrared spectroscopy (FT‐IR) analysis confirmed the formation of SiOM (M = Fe, Ni) bonds, indicating chemical incorporation of metals. During pyrolysis, in situ formed carbon coated the active sites, enhancing conductivity. The resulting Ni 2 Si/Fe x Si y /SiOC catalyst showed a low overpotential of 323 mV versus RHE at 10 mA cm −2 disk (0.25 mg cm −2 loading) under alkaline conditions, attributed to the synergy of Fe and Ni in improving the oxygen evolution reaction (OER). X‐ray absorption spectroscopy (XAS) reveals surface reconstruction of NiFe silicide toward a hydroxide during OER. Compared to previous Ni 2 Si/SiOC systems, the dual‐metal design notably enhanced catalytic performance. This study presents the successful synthesis of NiFe silicide catalysts for OER via the PDCs approach, demonstrating tunability of properties by the nickel to iron ratio, promising potential for water‐splitting and broader electrocatalytic applications. 10.1002/celc.202500406 http://creativecommons.org/licenses/by/4.0/
doi_str_mv	10.1002/celc.202500406
format	Artículo Open Access
id	wiley_oa_10_1002_celc_202500406
institution	Wiley Open Access
license_str_mv	http://creativecommons.org/licenses/by/4.0/
publishDate	2026
publisher	Wiley
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spellingShingle	Polymer‐Derived Nickel‐Iron Silicide‐Based Bimetallic Catalysts: Synthesis, Characterization, and Enhanced Catalytic Properties Toward the Oxygen Evolution Reaction Yaohao Zhang Zhaoju Yu Wei Li Chuanmu Tian Marcus Einert Jan P. Hofmann Marcel Risch Ralf Riedel ChemElectroChem Polymer‐Derived Nickel‐Iron Silicide‐Based Bimetallic Catalysts: Synthesis, Characterization, and Enhanced Catalytic Properties Toward the Oxygen Evolution Reaction Yaohao Zhang Zhaoju Yu Wei Li Chuanmu Tian Marcus Einert Jan P. Hofmann Marcel Risch Ralf Riedel ChemElectroChem The growing demand for green energy highlights the need for efficient hydrogen production through water splitting. Designing bimetallic electrocatalysts is crucial for this goal. Transition metal silicides are promising due to their abundance and high electrical conductivity. Here, a novel Ni 2 Si/Fe x Si y /SiOC composite was synthesized via a polymer‐derived ceramics (PDCs) route using a single‐source precursor (SSP). The SSP was prepared by modifying a high‐carbon polysiloxane (SPR‐684) with nickel and iron acetylacetonates. Fourier transform infrared spectroscopy (FT‐IR) analysis confirmed the formation of SiOM (M = Fe, Ni) bonds, indicating chemical incorporation of metals. During pyrolysis, in situ formed carbon coated the active sites, enhancing conductivity. The resulting Ni 2 Si/Fe x Si y /SiOC catalyst showed a low overpotential of 323 mV versus RHE at 10 mA cm −2 disk (0.25 mg cm −2 loading) under alkaline conditions, attributed to the synergy of Fe and Ni in improving the oxygen evolution reaction (OER). X‐ray absorption spectroscopy (XAS) reveals surface reconstruction of NiFe silicide toward a hydroxide during OER. Compared to previous Ni 2 Si/SiOC systems, the dual‐metal design notably enhanced catalytic performance. This study presents the successful synthesis of NiFe silicide catalysts for OER via the PDCs approach, demonstrating tunability of properties by the nickel to iron ratio, promising potential for water‐splitting and broader electrocatalytic applications. 10.1002/celc.202500406 http://creativecommons.org/licenses/by/4.0/
title	Polymer‐Derived Nickel‐Iron Silicide‐Based Bimetallic Catalysts: Synthesis, Characterization, and Enhanced Catalytic Properties Toward the Oxygen Evolution Reaction
topic	ChemElectroChem
url	https://chemistry-europe.onlinelibrary.wiley.com/doi/10.1002/celc.202500406

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