Departamento de Química Inorgánica, Cristalografía y Mineralogía (Unidad Asociada al ICP-CSIC), Facultad de Ciencias, Universidad de Málaga, Campus de Teatinos, 29071 Málaga, Spain.
J Hazard Mater. 2013 Sep 15;260:167-75. doi: 10.1016/j.jhazmat.2013.05.013. Epub 2013 May 15.
The gas phase catalytic hydrodechlorination (HDC) of chlorobenzene (CB) at atmospheric pressure was investigated over silica-supported cobalt and cobalt phosphide catalysts containing different P loading and a fixed amount of cobalt (5 wt.%). The effect of the initial P/Co molar ratio on the stoichiometry of the cobalt phosphide phase, the acidity and the hydrogen activation capability were discussed and these properties correlated with the catalytic activity. Catalytic results indicated that the cobalt phosphide phase is much more active than the monometallic cobalt one. The activity raised with the P content present in the sample due to the formation of the CoP phase instead of the Co₂P one, which favored the formation of hydrogen spillover species, increased the amount of weak acid sites and the number of exposed superficial cobalt atoms probably related to a better dispersion of the active phase. All the catalysts gave rise benzene as the main reaction product.
在常压下，通过在含有不同磷负载量和固定量钴（5wt%）的二氧化硅负载钴和磷化钴催化剂上，研究了氯苯（CB）的气相催化加氢脱氯（HDC）反应。讨论了初始 P/Co 摩尔比对磷化钴相的化学计量、酸度和氢活化能力的影响，并且这些性质与催化活性相关联。催化结果表明，磷化钴相比单金属钴相具有更高的活性。由于 CoP 相的形成而不是 Co₂P 相的形成，活性随着样品中磷含量的增加而提高，这有利于氢溢流物种的形成，增加了弱酸位的数量和暴露的表面钴原子的数量，这可能与活性相的更好分散有关。所有催化剂都导致苯成为主要的反应产物。
