u-Au双金属催化剂上乙酰丙酸气相加氢制γ-戊内酯的研究

series of SBA-15 supported Cu-Au bimetallic catalysts were prepared using an approach of adsorption-NaBH4 reduction for vapor phase hydrogenation of levulinic acid (LA) to γ-valerolactone (GVL). The catalyst structure was studied by means of XRD, UV-Vis diffuse reflectance spectroscopy and TEM. The results indicated that the addition of small amount of Au into Cu catalysts can not only significantly enhance the LA hydrogenation activity, but also effectively improve the stability of the catalysts. The superior performance of Cu-Au catalysts is related to the formation of Cu-Au alloy, which is beneficial for enhancing the catalytic performance and retarding the agglomeration of bimetallic nanoparticles in the process of hydrogenation reaction.