Synergistic effect of potassium hydroxide and steam co-treatment on the 
functionalization of carbon nanotubes applied as basic support in the 
Pd-catalyzed liquid-phase oxidation of ethanol

Dong, Weiwen; Xia, Wei; Xie, Kunpeng; Peng, Baoxiang; Muhler, Martin

doi:10.1016/j.carbon.2017.06.019

Item

ITEM ACTIONSEXPORT

Add to Basket

Local TagsRelease HistoryDetailsSummary

Released

Journal Article

Synergistic effect of potassium hydroxide and steam co-treatment on the functionalization of carbon nanotubes applied as basic support in the Pd-catalyzed liquid-phase oxidation of ethanol

MPS-Authors

/persons/resource/persons243842

Peng, Baoxiang
Research Department Schlögl, Max Planck Institute for Chemical Energy Conversion, Max Planck Society;

/persons/resource/persons21898

Muhler, Martin
Research Department Schlögl, Max Planck Institute for Chemical Energy Conversion, Max Planck Society;

External Resource

No external resources are shared

Fulltext (restricted access)

There are currently no full texts shared for your IP range.

Fulltext (public)

There are no public fulltexts stored in PuRe

Supplementary Material (public)

There is no public supplementary material available

Citation

Dong, W., Xia, W., Xie, K., Peng, B., & Muhler, M. (2017). Synergistic effect of potassium hydroxide and steam co-treatment on the functionalization of carbon nanotubes applied as basic support in the Pd-catalyzed liquid-phase oxidation of ethanol. Carbon, 121, 452-462. doi:10.1016/j.carbon.2017.06.019.

Cite as: https://hdl.handle.net/21.11116/0000-0006-E1F1-B

Abstract

Surface functionalization of carbon nanotubes (CNTs) was achieved by a thermal treatment in the presence of pre-adsorbed potassium hydroxide and steam at 350-550 C-circle. The generated oxygencontaining functional groups were more basic and thermally stable compared with conventional acidgenerated groups. The influence of the KOH-steam co-treatment conditions on the functionalization of CNTs was systematically investigated. Residual K species were found to intercalate in the inner graphene layers of the CNTs providing additional Bronsted basicity. Owing to the favorable basic properties and high thermal stability of the generated functional groups, Pd nanoparticles supported on the co-treated CNTs were found to be strongly anchored leading to a high degree of Pd dispersion and a high resistance to sintering. The Pd nanoparticles on the co-treated CNT support produced at 450 C-circle and 550 C-circle showed the highest activity and yields of acetic acid in the aerobic oxidation of aqueous ethanol reaching almost full conversion after 5 h in the absence of additional base. In addition, the KOH-steam co-treatment was found to enhance the recyclability of the Pd/CNT catalysts. (C) 2017 Elsevier Ltd. All rights reserved.