Jump to main content
Jump to site search

Issue 41, 2010
Previous Article Next Article

Catalytic effect of metal oxides on the oxidation resistance in carbon nanotube–inorganic hybrids

Author affiliations

Abstract

Hybridising carbon nanotubes (CNTs) with metal oxide nanostructures creates a new class of multifunctional materials with greatly enhanced performances as photocatalysts, chemical sensors, and in fuel cells and batteries. The low resistance of CNT towards oxidation often limits their applicability. On the other hand, exactly this ability to degrade CNTs at low temperatures is beneficial when using them as sacrificial templates for the synthesis of inorganic nanotubes. In this work, we investigate the oxidation resistance of 20 new hybrids and reveal that the presence of metal oxides can both inhibit and catalyse the oxidation of CNTs. As a result, the oxidation temperatures range from nearly 800 °C with Al2O3 to values as low as 330 °C with PbO and Bi2O3. We further demonstrate that the catalytic activity of the metal oxides correlates directly with their reducibility, i.e. the ability to create oxygen vacancies, and propose a mechanistic model based on Mars and van Krevelen, which allows prediction of the chemical stability of a wide range of CNT–metal oxide hybrids.

Graphical abstract: Catalytic effect of metal oxides on the oxidation resistance in carbon nanotube–inorganic hybrids

Back to tab navigation

Supplementary files

Publication details

The article was received on 20 Apr 2010, accepted on 28 Aug 2010 and first published on 21 Sep 2010


Article type: Paper
DOI: 10.1039/C0JM01129K
Citation: J. Mater. Chem., 2010,20, 9149-9154
  •   Request permissions

    Catalytic effect of metal oxides on the oxidation resistance in carbon nanotube–inorganic hybrids

    S. Aksel and D. Eder, J. Mater. Chem., 2010, 20, 9149
    DOI: 10.1039/C0JM01129K

Search articles by author

Spotlight

Advertisements