Author(s) Ai, P.; Tan, M.; Yamane, N.; Liu, G.; Fan, R.; Yang, G.; Yoneyama, Y.; Yang, R.; Tsubaki, N.
Journal Chemistry
Date Published 2017 Apr 18

Heteroatom doping is a promising approach to improve the properties of carbon material for customized applications. Herein, a series of boron-doped carbon nanotubes supported Cu catalysts (Cu/xB-CNTs) were prepared for the hydrogenation of dimethyl oxalate to ethanol. The structure and chemical properties of boron doped catalysts were characterized by XRD, TEM, N2O pulse adsorption, CO chemisorption, H2-TPR and NH3-TPD, which revealed that doping boron into CNTs support improved the Cu dispersion, strengthened the interaction of Cu species with CNTs support, introduced more surface acid sites and elevated surface area of both Cu0 and Cu+ sites, especially the surface area of Cu+ sites. Consequently, the catalytic activity and stability of the catalysts were greatly enhanced with boron doping. 100% DMO conversion and 78.1% ethanol selectivity could be achieved over the Cu/1B-CNTs catalyst, whose ethanol selectivity was almost 1.7 times higher than that of the catalyst without boron doping. These results suggest that doping CNTs with boron is an efficient approach to improve the catalytic performance of CNTs based catalysts for hydrogenation of DMO. The boron-doped CNTs based catalyst with improved ethanol selectivity and catalytic stability will be helpful in the development of efficient non-silica materials supported Cu catalysts for selective hydrogenation of DMO to ethanol.

DOI 10.1002/chem.201700821
ISSN 1521-3765
Citation Chemistry. 2017.

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