金-铂纳米空球催化甲醇氧化的行为

Catalytic behavior of Au-Pt hollow nanospheres towards electro-oxidation of methanol

介绍了以硒溶胶为模板,研制金-铂纳米空球[(Au-Pt)HN]及其修饰玻碳(GC)电极[(Au-Pt)HN/GC]的方法;用SEM、HR-TEM、UV-Vis、XRD和电化学循还伏安等方法检测了(Au-Pt)HN的表面形貌、结构与组成;碱性介质中,利用常规电化学方法研究了(Au-Pt)HN/GC对甲醇的电催化氧化行为,考察了金、铂配比不同的(Au-Pt)HN对催化甲醇氧化性能的影响,得出金、铂配比不同的(Au-Pt)HN对催化甲醇氧化的活性顺序为:20∶1>50∶1>100∶1>10∶1>5∶1。

Au-Pt hollow nanospheres were synthesized by using amorphous selenium spherical colloids as templates.Surface morphology,structure,composition of samples were characterized by SEM,HR-TEM,UV-Vis,XRD and electrochemical cyclic voltammetry.Conventional electrochemical method was used to study electro-catalytic oxidation to methanol of(Au-Pt)HN/GC in alkaline solution.The influence of catalytic activity was also investigated with different ratios of gold to platinum.It indicated that the order of catalytic activity with different ratios of gold to platinum is 20∶1>50∶1>100∶1>10∶1>5∶1.