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研究了乙醇水溶液光催化脱氢中Ａｇ对Ｐｔ／ＣｄＳ的助催效应，最佳匹配量和制备顺序为Ｐｔ（３％）／Ａｇ（１％）／ＣｄＳ．应用脱附法、ＸＰＳ和ＸＲＤ等实验方法研究了助催机理。结果表明：Ａｇ的助催作用包括化学效应──Ａｇ的ｓ、ｄ电子向Ｐｔ转移降低了Ｐｔ对Ｈ＿２的脱附能，有利于产氢，及Ａｇ的中介传递光生电子促进光生电子空穴对的分离；物理效应─—Ａｇ对Ｐｔ的集团分散作用减小了热处理时Ｐｔ的烧结降活，前者化学效应可能是主要的。
The promoting effect of Ag on Pt / CdS was studied in the photocatalytic dehydrogenation of ethanol aqueous solution. The best matching amount and preparation sequence were Pt (3%) / Ag (1%) / CdS. The application of desorption, XPS and XRD experimental methods to study the promoter mechanism. The results show that the promoters of Ag include chemical effect - the transfer of s to d Ag to Pt decreases the desorption energy of Pt to H 2, which is propitious to hydrogen production and the intermediation of Ag to promote photogenerated electron-hole pairs The physical effect-the Ag group Pt dispersion reduces the Pt sintering heat treatment deactivation, the former chemical effect may be the main.