Cu基非晶合金表面结构调控及电催化氧化性能研究

Study on surface structure regulation and electrocatalytic oxidation of Cu-based amorphous alloys

通过调控氢氟酸浓度、腐蚀时间在Cu基非晶合金表面制备出均匀多孔层结构,进而提高其电催化氧化性能,开发出高活性,低成本催化剂。采用X射线衍射及电子能谱对非晶合金条带进行结构表征与成分分析,使用扫描电子显微镜观察腐蚀后条带表面形貌变化,使用电化学工作站对Cu基非晶合金进行循环伏安和计时电流测试,研究腐蚀工艺参数及添加Ni对Cu基非晶合金电催化氧化性能影响。结果表明,HF处理对于Cu基非晶具有活化作用;其对甲醇的电催化氧化作用随腐蚀液浓度的增大和腐蚀时间的延长,呈先增大后减小趋势;改变合金成分,添加Ni元素有助于提高其电催化氧化性能。

By regulating the concentration of hydrofluoric acid and the corrosion time,uniform porous layer structure was prepared on the surface of Cu-based amorphous alloy to improve its electro-catalytic oxidation performance and develop a high activity and low cost catalyst.The structure and composition of amorphous alloy strip were characterized by X-ray diffraction(XRD)and energy dispersive spectroscopy(EDS).Scanning electron microscopy was used to observe the surface morphology of strips after corrosion.Cyclic voltammetry(CV)and chronoamperometry were performed on Cu-based amorphous alloy by electrochemical workstation.The effects of corrosion process parameters and Ni addition on electric-catalytic oxidation performance of Cu-base amorphous alloy were studied.The results show that HF treatment could activate cu-based amorphous.The oxidation of methanol increased first and then decreased with the increasing corrosion concentration and corrosion time.Changing the composition of the alloy and adding Ni element could improve its electro-catalytic oxidation performance.