中文摘要：

活跃地点和在醋酸(AcOH ) 的 PtSn/SiO ₂ 催化剂的催化表演上的热预告的处理的效果加氢在这篇文章被调查。催化剂被 N ₂ 描绘物理吸附， X 光检查衍射，传播电子显微镜学， pyridine Fourier 变换红外线的系列，和它的物理化学的性质上的 H ₂-O₂ 滴定。结果证明那磅种首先在水晶的结构被形成，没有 PtSn _x 合金被观察。与热预告的处理温度的增长，同时，磅分散由于磅粒子的聚集显示出一个减少的趋势。同时，路易斯酸地点的数量被拥有到 Sn 种类的作为结果的物理化学的性质变化的如此的热预告的处理显著地影响。有趣地，催化活动与路易斯酸地点的显示出类似的变化趋势，证实在 AcOH 加氢的路易斯酸地点的重要角色。而且，在暴露的磅和路易斯酸地点之间的平衡效果被获得，在 AcOH 加氢导致优异催化表演。

英文摘要：

The effect of thermal pretreatment on the active sites and catalytic performances of PtSn/SiO2 catalyst in acetic acid （AcOH） hydrogenation was investigated in this article. The catalysts were characterized by N2 physical adsorption, X-ray diffraction, transmission electron microscopy, pyridine Fourier-transform infrared spectra, and H2-O2 titration on its physicochemical properties. The results showed that Pt species were formed primarily in crystalline structure and no PtSnx alloy was observed. Meanwhile, with the increment of thermal pretreatrnent temperature, Pt dispersion showed a decreas- ing trend due to the aggregation of Pt particles. Simultaneously, the amount of Lewis acid sites was remarkably influenced by such thermal pretreatment owning to the consequent physicochemical property variation of Sn species. Interestingly, the catalytic activity showed the similar variation trend with that of Lewis acid sites, confirming the important roles of Lewis acid sites in AcOH hydrogenation. Moreover, a balancing effect between exposed Pt and Lewis acid sites was obtained, resulting in the superior catalytic performance in AcOH hydrogenation.