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Nitrogen/sulfur dual-doped mesoporous carbon with controllable morphology as a catalyst support for the methanol oxidation reaction

Chang, Yuanqin, Hong, Fei, Liu, Jinxin, Xie, Minsui, Zhang, Qianling, He, Chuanxin, Niu, Hanben, Liu, Jianhong
Carbon 2015 v.87 pp. 424-433
acetone, carbon, carbonization, catalysts, methanol, nanoparticles, nitrogen, oxidation, porous media, silica, sulfur
Ordered mesoporous carbon (OMC) was synthesized by nano-casting method using novel fluidic precursor – acrylonitrile telomer (ANT). By the penetration of mesoporous silica template with pure ANT, followed by the stabilization, carbonization and removal of the template, we obtained highly ordered mesoporous carbon rods (specific area 408m²g⁻¹). When an acetone solution of ANT (66 and 33wt.%) was used instead of pure ANT, carbon materials with mesopore ranging from 2 to 7nm were obtained (specific area 843 and 1012m²g⁻¹ respectively). Both nitrogen and sulfur atoms were doped into mesoporous carbon with 4 and 0.6at.% using nitrogen containing monomer and sulfur containing chain transfer agent, without involving complicated synthetic technique and poisonous gaseous compounds. This method was proved to be a facile way to synthesize nitrogen and sulfur containing OMC with partially controllable pore distribution and morphology. More importantly, due to unique mesopore structure and heteroatom doping, Pt nano-particles deposited on the OMCs showed electrocatalytic activity as high as 508mAmg⁻¹ Pt in methanol oxidation which is 1.7-fold of activity of Pt deposited on commercial Vulcan carbon black.