摘要
热分解法制备的涂层性能不够理想,现更多采用溶胶-凝胶法,但传统溶胶-凝胶法制备阳极仍存在工艺复杂、可操作性差的缺点。从电极的前驱体入手,将贵金属的无机盐制备成有机盐,采用溶胶-凝胶法制备了Ti/IrO2+Ta2O5阳极涂层,并与热分解法制备的涂层进行了对比研究。经SEM,EDX,循环伏安,电化学阻抗谱及强化电解寿命试验表明,与热分解法相比,由溶胶-凝胶法制备的氧化物阳极涂层表面呈现较多的龟裂纹,且有少量氧化铱晶簇析出,其电化学活性表面积增大,提高了电极的电催化活性,但稳定性降低。
Inorganic salts of precious metals were transformed to organic salts and used as precursors to prepare Ti/IrO2+Ta2O5 anode coating via sol-gel route.The performance of resultant anode coating was investigated and compared with that of the coating obtained via thermal decomposition by using scanning electron microscopy,energy dispersive spectrometry,cyclic voltammetry,electrochemical impedance spectroscopy and accelerated electrolysis life test.It was found that the oxide anode coating prepared via sol-gel route contained many large cracks and a small amount of segregated IrO2 on the surface,and as compared with the one prepared via thermal decomposition technique it had a larger specific area and higher electrocatalytic activity but poorer stability.
出处
《材料保护》
CAS
CSCD
北大核心
2010年第12期19-21,共3页
Materials Protection
