化工新型材料

化工新型材料 ›› 2020, Vol. 48 ›› Issue (10) : 111-114. DOI: 10.19817/j.cnki.issn 1006-3536.2020.10.024

新材料与新技术

铁镍双金属氧化物纳米材料的电沉积及电催化性能研究

张爱勤, 张欢, 肖元化, 张凯扬, 史鸿杰, 孟丹阳

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Electrodeposition and electrocatalytic performance of NiFe₂O₄ nanomaterial

Zhang Aiqin, Zhang Huan, Xiao Yuanhua, Zhang Kaiyang, Shi Hongjie, Meng Danyang

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摘要

采用循环伏安电沉积技术在泡沫镍(NF)基底上合成了铁镍双金属氧化物纳米材料(NiFe₂O₄),进而制备了NiFe₂O₄/NF电极。使用场发射扫描电镜(FE-SEM)、X射线衍射仪(XRD)对合成材料进行了结构形貌表征。采用极化曲线、恒电流电解等电化学技术研究了NiFe₂O₄/NF电极在碱性溶液中对电解水析氧反应(OER)的催化性能。结果表明:NiFe₂O₄/NF对OER反应具有良好的催化活性和稳定性,电流密度为10mA/cm²时的过电位仅为280mV,塔菲尔斜率为72.2mV/dec,恒电流电解2h后电位变化较小。和目前商用IrO₂电催化剂相比,大电流电解条件下的反应过电位降低。

Abstract

Fe,Ni bimetallic oxide nanomaterials (NiFe₂O₄) were successfully deposited on nickel foam substrate by cyclic voltammetric electrodeposition,and then prepared NiFe₂O₄/NF electrode.The morphology and structure of the nanomaterials were characterized by FE-SEM and XRD.Meanwhile,the electrocatalytic performances of the prepared NiFe₂O₄/NF electrode for oxygen evolution reaction (OER) in alkaline solution was tested by polarization curves and constant current electrolysis.The results indicated that the NiFe₂O₄/NF electrode exhibited excellent electrocatalytic performances for OER.The overpotential was 280mV for OER at the current density of 10mA/cm² and the Tafel slope was 72.2mV/dec.Moreover,the overpotential changed slightly after constant current electrolysis for 2 hours.Compared with the current commercial IrO₂ electrocatalyst,the overpotential of OER was reduced at high current density.

关键词

NiFe₂O₄ / 电沉积 / 电催化剂 / 析氧反应

Key words

NiFe₂O₄ / electrodeposition / electrocatalyst / oxygen evolution reaction

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铁镍双金属氧化物纳米材料的电沉积及电催化性能研究[J]. 化工新型材料, 2020, 48(10): 111-114 DOI:10.19817/j.cnki.issn 1006-3536.2020.10.024

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