The hydrodeoxygenation (HDO) of acetophenone was evaluated in liquid phase and gas phase over monometallic Pt/SiO₂, Co/SiO₂ and bimetallic Pt–Co/SiO₂ catalysts. The influence of reaction time and loading of the catalyst were analysed by following the conversion and products selectivity. Phenylethanol, cyclohexylethanone and cyclohexylethanol are the main products of reaction using the Pt/SiO₂ catalyst. By contrast, ethylbenzene and phenylethanol are the only products formed on the Co/SiO₂ and Pt–Co/SiO₂ catalysts. The bimetallic catalyst is more stable as a function of time and more active towards the HDO process than the monometallic systems. The presence of an organic solvent showed only minor changes in product yields with no effect on the product speciation. Periodic density functional theory analysis indicates a stronger interaction between the carbonyl group of acetophenone with Co than with Pt sites of the mono and bimetallic systems, indicating a key activity of oxophilic sites towards improved selectivity to deoxygenated products.

This article is part of the theme issue ‘Bio-derived and bioinspired sustainable advanced materials for emerging technologies (part 2)’.

在液相和气相中，在单金属 Pt/SiO ₂、Co/SiO ₂和双金属 Pt-Co/SiO ₂催化剂上对苯乙酮的加氢脱氧 (HDO) 进行了评估。反应时间和催化剂负载量对转化率和产物选择性的影响进行了分析。苯乙醇、环己基乙酮和环己基乙醇是使用Pt/SiO ₂催化剂反应的主要产物。相比之下，乙苯和苯乙醇是在 Co/SiO ₂和 Pt-Co/SiO ₂上形成的唯一产物催化剂。与单金属系统相比，双金属催化剂随着时间的推移更稳定，对 HDO 过程更活跃。有机溶剂的存在仅显示产物产率的微小变化，而对产物形态没有影响。周期密度泛函理论分析表明苯乙酮的羰基与 Co 之间的相互作用比与单金属和双金属系统的 Pt 位点之间的相互作用更强，表明亲氧位点对提高对脱氧产物的选择性的关键活性。

本文是主题问题“用于新兴技术的生物衍生和仿生可持续先进材料（第 2 部分）”的一部分。