Abstract
Cu/SBA-15 catalysts containing a small amount of Pt (Cu–Pt/SBA-15) were prepared by sequential adsorption–reduction method and examined for chemoselective hydrogenation of dimethyl oxalate (DMO) to ethylene glycol (EG). The Cu–Pt/SBA-15 catalyst with an optimal Cu/Pt atomic ratio of 10 showed a DMO conversion close to 100 % with a 98 % selectivity to EG at a temperature as low as 463 K. The results showed that the best Cu–Pt/SBA-15 enhanced the space time yield of EG by about 1.47 times compared with Cu/SBA-15. The introduction of Pt with stronger ability for H2 adsorption and activation substantially enhanced the reducibility of the Cu2+ species and further promoted the chemisorption capacity of H2. After reduction, a portion of Cu was alloyed with Pt, which was beneficial for the generation and stabilization of a balanced Cu+/Cu0 ratio during the hydrogenation process.
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We gratefully acknowledge the financial support from the National Basic Research Program of China (2011CBA00508), the Natural Science Foundation of China (21173175 and 20923004), the Research Fund for the Doctoral Program of Higher Education (20110121130002), and the Program for Changjiang Scholars and Innovative Research Team in University (IRT1036).
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Zheng, X., Lin, H., Zheng, J. et al. Pt-Promoted Cu/SBA-15 Catalysts with Excellent Performance for Chemoselective Hydrogenation of Dimethyl Oxalate to Ethylene Glycol. Top Catal 57, 1015–1025 (2014). https://doi.org/10.1007/s11244-014-0265-9
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DOI: https://doi.org/10.1007/s11244-014-0265-9