摘要
对表面粗糙度不同的钛(Ti)基体进行抛光和喷砂处理,通过H2IrCl6和Mn(NO3)2水溶剂在处理后的基体上制备IrO2+MnO2涂层。采用扫描电子显微镜(SEM),场发射扫描电子显微镜(FESEM),循环伏安法(CV)和阳极极化曲线研究了不同表面粗糙度的IrO2+MnO2涂层的表面特性,结构和电催化活性。在所有通过喷砂处理的基体表面上制备的IrO2+MnO2涂层中,都可以分离出二氧化铱纳米棒,但通过抛光处理的涂层不能形成。通过喷砂处理的IrO2+MnO2涂层的qT,qo,qi和i/qT值远远高于抛光处理的涂层。表面粗糙度为1.3μm的IrO2+MnO2涂层比其他涂层具有更好的电催化活性。
Titanium( Ti) substrates with different surface roughness( Ra) were carried out by polishing and sand-blasting technology,and then IrO2+ MnO2 coatings were prepared on the Ti substrates with different Raby thermal decomposition of a H2IrCl6 and Mn(NO3)2hydrosolvent. The surface characteristics,structure and electro-catalytic activities of the IrO2+ MnO2 coatings were investigated by scanning electron microscopy( SEM),field emission scanning electron microscopy( FESEM),cyclic voltammetry( CV) and anodic polarization curves. All IrO2+ MnO2 coatings by sand-blasting treatment to the surface of Ti substrates can form IrO2nano-poles on the coating surfaces,while the coating by polishing treatment can not. The qT,qo,qiand i / qTvalues of the IrO2+ MnO2 coatings by sandblasting treatment to the surface of Ti substrates are far greater than that of the coating by polishing treatment. IrO2+ MnO2 coating with Ra of 1. 3 μm has the most excellent electro-catalytic activity than other coatings.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2015年第S1期235-242,共8页
Transactions of Materials and Heat Treatment
基金
国家自然科学基金和航空基金项目(21103085,2013ZF56022)
