High dispersion of Pt on carbon supports is expected to provide improved catalytic performance. In this study, Pt/C catalysts have been prepared by a deposition–precipitation method with different concentrations of sodium propionate (SP) as a stabilizer. Carbon black (CB), multiwall carbon nanotubes (MWCNTs), and carbon nanofibers (CNFs) have been used as catalyst supports. The dispersion and particle size of Pt have been shown to depend on the type of carbon support and the concentration of SP. The addition of SP can increase the ionic strength and thus improve the dispersion of Pt via the formation of Pt complexes, which prevents the aggregation of Pt nanoparticles. The activities of the prepared catalysts for d-glucose hydrogenation have been investigated. Both d-glucose conversion and d-sorbitol selectivity have been found to increase with increased Pt dispersion. The Pt/CB_SP0.5 catalyst with the highest Pt dispersion (59 %) has been shown to exhibit the best catalytic performance. Further investigations revealed that the product distribution is strongly affected by the surface acidity and the reaction conditions. Thus, SP can be used as a stabilizer to obtain highly dispersed Pt/C catalysts with good d-glucose conversion and d-sorbitol selectivity.

Pt在碳载体上的高分散性有望提供改进的催化性能。在这项研究中，Pt / C催化剂是通过沉积沉淀法制备的，其中使用不同浓度的丙酸钠（SP）作为稳定剂。炭黑（CB），多壁碳纳米管（MWCNT）和碳纳米纤维（CNF）已用作催化剂载体。已显示出Pt的分散度和粒径取决于碳载体的类型和SP的浓度。SP的添加可以增加离子强度，从而通过Pt络合物的形成改善Pt的分散性，从而防止Pt纳米颗粒的聚集。已经研究了所制备的用于d-葡萄糖氢化的催化剂的活性。都d和葡萄糖转化d -山梨醇选择性已发现增加与增加铂分散。已显示具有最高Pt分散度（59％）的Pt / CB_SP0.5催化剂表现出最佳的催化性能。进一步的研究表明，产物的分布受表面酸度和反应条件的强烈影响。因此，SP可以用作稳定剂以获得具有良好的d-葡萄糖转化率和d-山梨糖醇选择性的高度分散的Pt / C催化剂。