Abstract Selective oxidation of glycerol with molecular oxygen in base-free aqueous solutions has become a hot topic, as the rapidly increasing production of biodiesel is creating a surplus of glycerol. In this work, an N-doped-carbon-supported core-shell structured Sb@PtSb2 hybrid catalyst was prepared via a facile synthesis route, in which a mixture of glucose, melamine, and SbCl3 (Sb-NC) was pyrolyzed, then impregnated with Pt by immersion in an aqueous solution of H2PtCl6, and further treated in hydrogen flow. Characterization of the catalyst products indicated that introducing SbCl3 can increase the surface area of the binary glucose + melamine pyrolyzed support (NC), and Sb@PtSb2 hybrids could be formed on the surface of an Sb-NC support during hydrogen treatment at 700 °C. It was found that the Sb@PtSb2/NC catalyst was more active for the selective oxidation of glycerol in a base-free aqueous solution than Sb-free NC-supported Pt (Pt/NC). Further characterization also indicated that the promising performance of Sb@PtSb2/NC might be attributed to its enhanced oxygen activation.

中文翻译：

---

在 N 掺杂碳负载的 Sb@PtSb2 杂化物上的无碱溶液中用氧选择性氧化甘油

摘要 在无碱水溶液中用分子氧选择性氧化甘油已成为一个热门话题，因为生物柴油产量的迅速增加造成了甘油的过剩。在这项工作中，通过简单的合成路线，将葡萄糖、三聚氰胺和 SbCl3 (Sb-NC) 的混合物热解，然后浸渍，制备了 N 掺杂碳负载的核壳结构 Sb@PtSb2 杂化催化剂将 Pt 浸入 H2PtCl6 水溶液中，并在氢气流中进一步处理。催化剂产物的表征表明，引入 SbCl3 可以增加二元葡萄糖 + 三聚氰胺热解载体 (NC) 的表面积，并且在 700°C 氢处理过程中，Sb-NC 载体表面可以形成 Sb@PtSb2 杂化物. 结果表明，在无碱水溶液中，Sb@PtSb2/NC 催化剂比无 Sb NC 负载的 Pt（Pt/NC）对甘油的选择性氧化更具活性。进一步的表征还表明，Sb@PtSb2/NC 的良好性能可能归因于其增强的氧活化。