Abstract
A series of M-WOx-MgOy (M = Ni, Pd, Pt, Ru) catalysts was prepared and their catalytic performances were systematically investigated in the chemoselective hydrogenolysis of glucose to diols. Among these catalysts, Ru-WOx-MgOy exhibited superior catalytic activity in the production of diols as well as ethylene glycol from glucose under mild reaction conditions. Then various Characteristic techniques including XRD, BET, FTIR, SEM, TEM, HAADF-STEM, XPS, NH3-TPD, and Pyridine-adsorbed DRIFTS were adopted to investigate the structural properties of these catalysts and correlate them with their catalytic performances. Based on these characterization results, it showed that the outstanding catalytic activity of Ru-WOx-MgOy catalyst was attributed to its higher content of oxygen vacancies, which served as the active acidic sites and greatly lowered the activation energy required for glucose conversion, thereby promoting the efficient production of diols.
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