Preparation of NiFe-based nanofibers by electrospinning and their oxygen evolution reaction performances

doi:10.16085/j.issn.1000-6613.2019-0094

Abstract

Abstract:

Efficient oxygen evolution reaction (OER) catalysts are essential for efficient energy storage and conversion. In this paper, nickel-iron alloy with nickel ferrite composite nanofibers (NiFe/NiFe₂O₄) were successfully prepared by electrospinning combined with one-step calcination. The conditions of the calcination atmosphere, temperature and element ratio were modulated. X-ray diffraction (XRD), scanning electron microscopy (SEM) and electrochemical methods were used to characterize and analyze these samples. Significantly, the electrochemical test results showed that the material had a high electrocatalytic activity for oxygen evolution reaction in alkaline medium (1mol/L KOH). The optimum sample required a overpotential of 380mV at 10mA/cm², which exhibited excellent stability after chronopotentiometry for 10h.

Key words: electrospinning, catalyst, electrochemistry, composites, oxygen evolution reaction, NiFe alloy, NiFe₂O₄

摘要：

高效的析氧反应（OER）催化剂对于高效的能量储存和转换是必不可少的。本文采用静电纺丝法结合一步煅烧成功制备了镍铁合金/铁酸镍复合纳米纤维（NiFe/NiFe₂O₄），通过调变煅烧气氛、温度、元素比例等条件并结合X射线衍射（XRD）、扫描电镜（SEM）和电化学等测试手段对材料进行了相关表征与分析。其中电化学测试结果显示，该材料对碱性介质（1mol/L KOH）中析氧反应具有较高的电催化活性，最佳样品在电流密度达到10mA/cm²时所需过电位为380mV，并且在计时电位法测试10h后也表现出极佳的稳定性。

关键词: 静电纺丝, 催化剂, 电化学, 复合材料, 析氧反应, 铁镍合金, 铁酸镍

CLC Number:

TB34

Mojie SUN,Dongyao LIN,Zhao WANG,Shijie WANG,Jiusheng WANG,Dong WANG. Preparation of NiFe-based nanofibers by electrospinning and their oxygen evolution reaction performances[J]. Chemical Industry and Engineering Progress, 2019, 38(10): 4645-4650.

孙墨杰,林东尧,王钊,王世杰,王久生,王冬. 静电纺丝制备镍铁纳米纤维及其析氧性能[J]. 化工进展, 2019, 38(10): 4645-4650.

Figures/Tables 8

References 17

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纺丝工艺参数	最佳范围
环境湿度	<50%
环境温度	15～20℃
纺丝电压	15～25kV
针头内径	0.45～0.55mm
固化距离	15～20cm

纺丝工艺参数	最佳范围
环境湿度	<50%
环境温度	15～20℃
纺丝电压	15～25kV
针头内径	0.45～0.55mm
固化距离	15～20cm

纺丝液参数	最佳范围
无机物浓度	<0.3mol·L^-1
PVP浓度	0.12～0.16g·mL^-1

纺丝液参数	最佳范围
无机物浓度	<0.3mol·L^-1
PVP浓度	0.12～0.16g·mL^-1

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