摘要
通过水热方法在不锈钢基底上制备MnO2、NiCo2O4及MnO2/NiCo2O4纳米膜,进行SEM、XRD、TEM等测试分析,并对其析氢效果进行电化学表征。结果表明:MnO2纳米材料在不锈钢表面形成了均匀分布形态,具有花瓣状堆叠的结构;NiCo2O4纳米材料呈垂直形态,表现出明显取向性排列趋势。MnO2/NiCo2O4/316L的XRD图谱上除存在不锈钢对应的3个特征衍射峰之外,还形成了NiCo2O4对应的衍射峰,MnO2(220)晶面的特征峰表现为往低角度偏移的现象。经极化曲线测试发现,MnO2/NiCo2O4纳米材料具备优异的析氢性能,并且随着过电位增大,电流密度也明显上升,具有更快的析氢反应速度,表明NiCo2O4与MnO2之间可以通过协同作用提高析氢性能。
MnO2,NiCo2O4 and MnO2/NiCo2O4 nano-films were prepared on stainless steel substrates by hydrothermal method.SEM,XRD,TEM analysis were carried out,and their hydrogen evolution effects were characterized electrochemically.The results show that MnO2 nano-materials form a uniform distribution on the surface of stainless steel and have a petal-shaped stacked structure.NiCo2O4 nano-materials are in vertical form,showing obvious alignment trend.In addition to the three characteristic diffraction peaks corresponding to stainless steel,the XRD pattern of MnO2/NiCo2O4/316 L also forms the diffraction peak corresponding to NiCo2O4,and the characteristic peak of MnO2(220)crystal plane appears to shift to a low angle.The polarization curve test shows that MnO2/NiCo2O4 nanomaterials have excellent hydrogen evolution performance,and with the increase of overpotential,the current density also increases significantly,with a faster hydrogen evolution reaction speed,indicating that the hydrogen evolution performance is improved by synergistic effect between NiCo2O4 and MnO2.
作者
吴长有
刘俊超
何文
WU Chang-you;LIU Jun-chao;HE Wen(Department of Mechanical Engineering,Kaifeng Institute of Technicians,Kaifeng 475000 China;Department of Mechanical Engineering,Puyang Institute of Technicians,Puyang 457000,China;Shenzhen Aomeite Technology Co.,Ltd.,Shenzhen 518000,China)
出处
《粉末冶金工业》
CAS
北大核心
2019年第4期47-50,共4页
Powder Metallurgy Industry
基金
河南省科技计划资助项目(182102210303)
