Boron-doped lamellar porous carbon supported copper catalyst for dimethyl oxalate hydrogenation

doi:10.1016/j.cjche.2022.06.020

Abstract

Abstract: Doping heteroatoms on carbon materials could bring some special advantages for using as catalyst support. In this work, a boron doped lamellar porous carbon (B-LPC) was prepared facilely and utilized as carbon-based support to construct Cu/B-LPC catalyst for dimethyl oxalate (DMO) hydrogenation. Doping boron could make the B-LPC own more defects on surface and bigger pore size than B-free LPC, which were beneficial to disperse and anchor Cu nanoparticles. Moreover, the interaction between Cu species and B-LPC could be strengthened by the doped B, which not only stabilized the Cu nanoparticles, but also tuned the valence of Cu species to maintain more Cu⁺. Therefore, the B-doped Cu/B-LPC catalyst exhibited stronger hydrogenation ability and obtained higher alcohols selectivity than Cu/LPC, as well as high stability without decrease of DMO conversion and ethylene glycol selectivity even after 300 h of reaction at 240 ℃.

Key words: Hydrogenation, Cu-based catalyst, Boron doping, Porous carbon, Catalyst support, Alcohol

摘要： Doping heteroatoms on carbon materials could bring some special advantages for using as catalyst support. In this work, a boron doped lamellar porous carbon (B-LPC) was prepared facilely and utilized as carbon-based support to construct Cu/B-LPC catalyst for dimethyl oxalate (DMO) hydrogenation. Doping boron could make the B-LPC own more defects on surface and bigger pore size than B-free LPC, which were beneficial to disperse and anchor Cu nanoparticles. Moreover, the interaction between Cu species and B-LPC could be strengthened by the doped B, which not only stabilized the Cu nanoparticles, but also tuned the valence of Cu species to maintain more Cu⁺. Therefore, the B-doped Cu/B-LPC catalyst exhibited stronger hydrogenation ability and obtained higher alcohols selectivity than Cu/LPC, as well as high stability without decrease of DMO conversion and ethylene glycol selectivity even after 300 h of reaction at 240 ℃.

关键词: Hydrogenation, Cu-based catalyst, Boron doping, Porous carbon, Catalyst support, Alcohol

Peipei Ai, Li Zhang, Jinchi Niu, Huiqing Jin, Wei Huang. Boron-doped lamellar porous carbon supported copper catalyst for dimethyl oxalate hydrogenation[J]. Chinese Journal of Chemical Engineering, 2023, 55(3): 222-229.

Peipei Ai, Li Zhang, Jinchi Niu, Huiqing Jin, Wei Huang. Boron-doped lamellar porous carbon supported copper catalyst for dimethyl oxalate hydrogenation[J]. 中国化学工程学报, 2023, 55(3): 222-229.

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