LEI Jiaqi, DUAN Xuezhi, QIAN Gang, et al. Effects of carbon support on glycerol oxidation over Pt-C composite catalysts in base-free conditions[J]. CIESC Journal, 2017, (2): 679-686.
LEI Jiaqi, DUAN Xuezhi, QIAN Gang, et al. Effects of carbon support on glycerol oxidation over Pt-C composite catalysts in base-free conditions[J]. CIESC Journal, 2017, (2): 679-686.DOI: 10.11949/j.issn.0438-1157.20161026.
Activated carbon (AC) and carbon nanotubes (CNTs) supported Pt catalysts with similar particle sizes prepared by incipient wetness impregnation method were used for study of base-free oxidation of glycerol. The results showed that carbon support of Pt-C composite catalysts had significant impact on reactivity
selectivity
and steady state of glycerol oxidation. Compared to Pt/CNTs catalyst
Pt/AC catalyst had a lower binding energy of Pt 4f leading to a higher oxygen coverage on catalyst surface which reduced glycerol adsorption and initial activity of glycerol oxidation. Pt/AC catalyst further favored oxidation of glyceraldehyde to glyceric acid and C-C bond cleavage of C3 products. With regards to catalyst deactivation
oxygen poison and adsorption of intermediates were main factors to Pt/AC catalyst while blockage of Pt active sites by adsorption of glyceric acid was a significant contributor to Pt/CNTs catalyst.