摘要
在高温空气处理的Pt/CdS上,溶液pH对乙醇光催化脱氢速率(γH_2)影响的研究揭示出γH_2曲线上有一最低点,该点的pH正好与催化剂的零电荷点相对应,表明在处理的Pt/CdS上存在着两类活性表面位置。文中利用自旋捕获技术和动力学方法对这一问题作了进一步的论证。
On high-temperature air treated Pt/CdS catalyst, the influence of pH of the aqueous ethanol solution on the rate (rH2) of photocatalytic dchydrogenation of ethanol was investigated. The results reveal that there is a minimum rHz at ca. pH 9 which corresponds 1o the point of zero charge (PZC) of the treated Pt/CdS, and suggest that there are two types of surface site existed on the catalyst. This problem has been further studied by means of the spin trapping technique and kinetic method.
基金
国家自然科学基金
