泡沫铜负载(MnO2/SnO2)-Ni层材料的制备及其电催化析氧性能研究
Preparation of(MnO2/SnO2)-Ni layers based on copper foam and their electrocatalytic oxygen evolution performance
徐波 1梁晓雨 1赵明 1于佳正 1张斌1
作者信息
- 1. 北方工业大学 机械与材料工程学院,北京 100144
- 折叠
摘要
采用复合电沉积优化工艺成功制备了泡沫铜负载(MnO2/SnO2)-Ni层材料.利用X射线衍射仪(XRD)、扫描电子显微镜(SEM)、能量色散X射线光谱仪(EDX)、X射线光电子能谱仪(XPS)对泡沫铜负载(MnO2/SnO2)-Ni层材料的物相组成、表面形貌、元素分布、元素价态进行分析.结果表明,利用该复合电沉积优化工艺可以通过在泡沫铜基体表面金属镍的电沉积和金属镍层对MnO2 和SnO2 微颗粒的包覆,成功地制备了泡沫金属铜基体负载(MnO2/SnO2)-Ni层材料.在浓度为1 mol/L的KOH溶液中利用极化曲线(LSV)、循环伏安曲线(CV)、电化学阻抗谱(EIS)、计时电流法(IT)原位分析了泡沫铜负载(MnO2/SnO2)-Ni层材料、泡沫铜负载MnO2-Ni材料、泡沫铜负载SnO2-Ni层材料和泡沫铜负载Ni层材料的电催化析氧性能与稳定性.实验结果表明,在MnO2 及SnO2 微颗粒均为10g/L条件下制备的泡沫铜基体负载(MnO2/SnO2)-Ni层材料在100 mA/cm2 电流密度的析氧过电位仅为223.2 mV,具有较小的Tafel斜率值,约为153.8 mV/dec,且经过200 圈循环伏安法循环后,过电位衰减较低,具有很好的析氧催化活性与稳定性,原因在于MnO2 和SnO2 的协同作用可以使泡沫铜负载(MnO2/SnO2)-Ni层材料具有优异的析氧催化性能.
Abstract
Copper foam-loaded MnO2/SnO2 microparticle-Ni layer materials have been successfully prepared by a composite electrodeposition optimization process.X-ray diffraction(XRD),scanning electron microscopy(SEM)and energy dispersive X-ray spectrometry(EDX)were used to analyze the phase composition,surface morphology,element distribution and element valence of the copper foam-loaded(MnO2/SnO2)-Ni layer materials.The results show that the composite electrodeposition optimization process can be used to prepare the(MnO2/SnO2)-Ni layer based on copper foam by means of the electrodeposition of nickel on the copper foam and subsequent coating of MnO2 and SnO2 microparticles on the nickel layer.The electrocatalytic oxygen evolution performance of copper foam-loaded(MnO2/SnO2)-Ni layer materials,copper foam-loaded MnO2-Ni layer materials,copper foam-loaded SnO2-Ni layer materials and copper foam-loaded Ni layer materials were analyzed in situ by polarization measure-ments(LSV),cyclic voltammetry(CV)and electrochemical impedance spectroscopy(EIS)in 1 mol/L KOH so-lution.The results show that the oxygen evolution overpotential of copper foam matrix-supported(MnO2/SnO2)-Ni layer material at a current density of 10 g/L,100 mA/cm2 is only 223.2 mV,with a small Tafel slope of about 158.3 mV/dec.After 200 cycles of voltammetry,the overpotential decay is low,and the oxygen evolution catalytic activity and stability are good.This suggests that the synergistic effect of MnO2 and SnO2 loaded on the copper foam can significantly enhance the catalytic performance.
关键词
电解水/析氧反应/电沉积/二氧化锰/二氧化锡Key words
electrolysis of water/oxygen evolution reaction/electrodeposition/SnO2/MnO2引用本文复制引用
出版年
2024
NETL
NSTL
万方数据