In this work, four cobalt-based catalysts were obtained using two routes of preparation which differed in the expected degree of interaction with the silica matrix, using salicylic acid as a sacrificial modifier during the synthesis to modulate the interaction between the cobalt phase and the silica support due to its complexing properties. The catalysts were tested for the hydroconversion of guaiacol at 300 °C and 5 MPa of H₂, with clear differences between each procedure. It is found that the synthesis route has a deep impact on the catalytic activity, with the catalysts prepared using a one-pot route being less active and having an increased selectivity to cyclohexane. In contrast, the ones prepared using a two-step process have increased yield towards phenol and cyclohexanol under the conditions used herein. Salicylic acid increases the catalytic activity in comparison to the untreated material for both families of materials, without changing the observed selectivity between samples with the same preparation.

中文翻译：

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用于愈创木酚加氢转化的钴基核壳催化剂：使用水杨酸作为金属相与二氧化硅载体之间相互作用的牺牲调节剂


在这项工作中，使用两种制备途径获得了四种钴基催化剂，这两种制备途径与二氧化硅基质的预期相互作用程度不同，在合成过程中使用水杨酸作为牺牲改性剂来调节钴相与二氧化硅之间的相互作用由于其络合特性而得到支持。在 300 °C 和 5 MPa H ₂ 下对催化剂进行愈创木酚加氢转化测试，每个过程之间存在明显差异。研究发现，合成路线对催化活性有深远的影响，使用一锅法制备的催化剂活性较低，但对环己烷的选择性较高。相反，使用两步法制备的那些在本文所用的条件下具有增加的苯酚和环己醇的产率。与未处理的材料相比，水杨酸提高了这两个材料家族的催化活性，而不改变具有相同制备的样品之间观察到的选择性。