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首页> 外文期刊>Catalysis Communications >Effect of Pt addition on the isomerization properties of MoO_(2-x)(OH)_y deposited on TiO2
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Effect of Pt addition on the isomerization properties of MoO_(2-x)(OH)_y deposited on TiO2

机译：Pt添加对TiO2上MoO_（2-x）（OH）_y异构化性能的影响

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摘要

Isomerization of n-hexane and n-pentane were studied using equivalent 5 monolayers of MoO3 deposited on TiO2. Addition of 2.5% Pt by weight of MoO3 on the Mo catalyst resulted in an increase in the catalytic activity of the system in favor of hydrocracking products. Surface characterization by XPS-UPS and ISS reveal that the sample surface contains Oxygen, Molybdenum, Platinum and Titanium. Apparently, the metallic properties of the deposited Pt favors the hydrocracking reactions and becomes dominant at reaction temperatures higher than 623 K. Balanced metal-acid functions in MoO_(2-x)(OH)_y phase seems to be in optimized condition toward the hydroisomerization process. The contribution of Platinum addition to this catalytic reaction is not obvious. Combination of surface XPS-UPS, ISS and catalytic reactions carried out at similar experimental conditions enabled us to have better insight concerning the catalytic activities of the different chemical species present on the sample surface.
机译：使用沉积在TiO2上的MoO3的5个等效单层研究了正己烷和正戊烷的异构化。在Mo催化剂上添加按重量计2.5％的MoO 3的Pt导致系统的催化活性增加，有利于加氢裂化产物。通过XPS-UPS和ISS进行的表面表征表明，样品表面含有氧气，钼，铂和钛。显然，沉积的Pt的金属性质有利于加氢裂化反应，并在高于623 K的反应温度下占主导地位。MoO_（2-x）（OH）_y相中平衡的金属酸功能似乎处于加氢异构化的最佳条件处理。铂加成对该催化反应的贡献并不明显。表面XPS-UPS，ISS和在相似实验条件下进行的催化反应的结合使我们对样品表面上存在的不同化学物种的催化活性有了更好的了解。

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