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首页> 外文期刊>Catalysis science & technology >Boosting the activity of hydrogen release from liquid organic hydrogen carrier systems by sulfur-additives to Pt on alumina catalysts
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Boosting the activity of hydrogen release from liquid organic hydrogen carrier systems by sulfur-additives to Pt on alumina catalysts

机译：提高氢释放的活性液体有机氢载体系统sulfur-additives Pt氧化铝催化剂

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摘要

Liquid organic hydrogen carrier (LOHC) systems are a promising alternative for energy storage and transport. The development of an active and selective LOHC-dehydrogenation catalyst is therefore of great importance. In this study we present a modification procedure of Pt/Al2O3 catalysts with a sulfur containing compound that results in improved activity as well as in reduced side product formation. Here, it appears that the right amount of applied sulfur species is crucial to reach the described effects. The optimum value depends on the support surface area and the molar ratio of sulfur to surface platinum. Mechanistic studies of the sulfur modification by infrared spectroscopy (DRIFTS) with adsorbed CO revealed that preferentially low coordinated defect sites (edges or corner/apex Pt atoms) are blocked by sulfur compounds and that these are the ones responsible for side reactions. The sulfur species were found to modify the electronic properties of Pt and this facilitates the desorption of the aromatic dehydrogenation products.
机译：液体有机氢载体(LOHC)系统一个有前途的替代能源存储和交通工具。选择性LOHC-dehydrogenation催化剂因此具有十分重要的意义。提出一个修改程序Pt /氧化铝催化剂的含硫化合物改进活动以及结果减少产品的形成。适量的应用硫物种达到上述效果是至关重要的。最优值取决于支持表面积和硫的摩尔比率白金。修改的红外光谱(飘)与吸附公司透露,优先低协调缺陷网站(边缘或角落/顶点Pt原子)被硫化合物这些都是负责的反应。修改的电子性质Pt和促进芳香的解吸脱氢产品。

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