Preparation of FeNi3-Fe3O4/CN electrocatalysts and their electrocatalytic oxygen evolution performance

doi:10.16085/j.issn.1000-6613.2024-0966

Abstract

Abstract:

In water electrolysis to hydrogen, the oxygen evolution reaction (OER) on the anode has a high energy barrier, which reduces the efficiency of water electrolysis. Therefore, the development of efficient oxygen evolution catalysts is crucial to promote the industrialization of water electrolysis. A series of FeNi/CN catalysts with various Fe and Ni contents were prepared by high-temperature pyrolysis of polyaniline, ferric nitrate and nickel nitrate. The structure of the catalysts was characterized by X-ray diffraction (XRD), Transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS), and their electrochemical OER performance in alkaline electrolyte was evaluated using linear sweep voltammetry (LSV) and chronoamperometry (CP). The results showed that the prepared catalysts containing FeNi₃ and Fe₃O₄ nanoparticles were well-dispersed on the polyaniline-derived carbon. With the gradual decrease in Fe content, the OER overpotential initially decreased and then increased. The Fe1Ni1/CN catalyst exhibited the lowest OER overpotential of only 339mV at 10mA/cm² and a Tafel slope of 87mV/dec, demonstrating an OER activity superior to most iron-based and nickel-based catalysts reported in the literature.

Key words: electrochemistry, catalyst, composites, oxygen evolution reaction, ferroferric oxide (Fe₃O₄), NiFe alloy

摘要：

电解水制氢中的阳极析氧反应（OER）因反应能垒较高，降低了电解水的效率，因此研发高效的析氧催化剂是推动电解水产业化的重要途径。本文通过高温热解聚苯胺、硝酸铁和硝酸镍制备了一系列不同Fe和Ni含量的FeNi/CN催化剂。通过X射线衍射（XRD）、透射电镜（TEM）和X射线光电子能谱（XPS）等分析手段表征了催化剂的结构，采用线性扫描伏安法（LSV）和计时电位法（CP）等方法在碱性电解液中评价了催化剂的电化学析氧性能。结果表明，所制备的催化剂中含有FeNi₃和Fe₃O₄纳米颗粒，这些颗粒很好地分散在聚苯胺衍生的碳上。随着铁含量的逐渐降低，OER过电位表现出先减小后增大的趋势。其中，Fe1Ni1/CN催化剂具有最低的OER过电位，在10mA/cm²下的过电位仅为339mV，Tafel斜率为87mV/dec，表现出最好的OER催化活性，优于文献中报道的大多数铁基和镍基催化剂。

关键词: 电化学, 催化剂, 复合材料, 析氧反应, 四氧化三铁, 镍铁合金

CLC Number:

TQ138.1

CHEN Dongjian, SUN Yuqian, YIN Fengxiang. Preparation of FeNi₃-Fe₃O₄/CN electrocatalysts and their electrocatalytic oxygen evolution performance[J]. Chemical Industry and Engineering Progress, 2025, 44(7): 3928-3937.

陈东健, 孙雨倩, 银凤翔. FeNi₃-Fe₃O₄/CN催化剂的制备及其电催化析氧性能[J]. 化工进展, 2025, 44(7): 3928-3937.

Figures/Tables 10

References 50

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催化剂	电解液	η₁₀/mV	Tafel斜率/mV·dec^-1	参考文献
Fe1Ni1/CN	1mol/L KOH	339	87	本工作
Fe₃O₄/FeS₂	1mol/L KOH	253	48	[14]
FeNi₃N-Ni₃S₂	1mol/L KOH	230	39	[24]
FeNiO _x /C	1mol/L KOH	310	58	[36]
Fe₃O₄@N-HCNT	1mol/L KOH	500	64	[37]
Fe-NiO	1mol/L KOH	380	42	[38]
Ni₃FeN	0.1mol/L KOH	355	70	[39]
NiFe-LDH/CNT	0.1mol/L KOH	350	54	[40]
NiFe₂O _x	1mol/L KOH	356	57	[41]
Ni₉S₈	1mol/L KOH	480	56	[42]
Fe _x Ni_1-_x Co₂O₄	1mol/L KOH	350	27	[43]

催化剂	电解液	η₁₀/mV	Tafel斜率/mV·dec^-1	参考文献
Fe1Ni1/CN	1mol/L KOH	339	87	本工作
Fe₃O₄/FeS₂	1mol/L KOH	253	48	[14]
FeNi₃N-Ni₃S₂	1mol/L KOH	230	39	[24]
FeNiO _x /C	1mol/L KOH	310	58	[36]
Fe₃O₄@N-HCNT	1mol/L KOH	500	64	[37]
Fe-NiO	1mol/L KOH	380	42	[38]
Ni₃FeN	0.1mol/L KOH	355	70	[39]
NiFe-LDH/CNT	0.1mol/L KOH	350	54	[40]
NiFe₂O _x	1mol/L KOH	356	57	[41]
Ni₉S₈	1mol/L KOH	480	56	[42]
Fe _x Ni_1-_x Co₂O₄	1mol/L KOH	350	27	[43]

Preparation of FeNi₃-Fe₃O₄/CN electrocatalysts and their electrocatalytic oxygen evolution performance

FeNi₃-Fe₃O₄/CN催化剂的制备及其电催化析氧性能

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