Co-Catalytic Solid-State Reduction Applied to Carbon Nanotube Growth
The Journal of Physical Chemistry C2011Vol. 116(1), pp. 1107–1113
Citations Over TimeTop 23% of 2011 papers
Bernhard C. Bayer, Martin Fouquet, Raoul Blume, Christoph Wirth, Robert S. Weatherup, Ken Ogata, Axel Knop‐Gericke, Robert Schlögl, Stephan Hofmann, John Robertson
Abstract
We report on a new class of cocatalysts for the chemical vapor deposition of carbon nanotubes, where the cocomponent (Ta) acts as a solid-state reducing agent for the active catalyst (Fe). The cocatalytic FeTa system enables carbon nanotube growth without the need for a reducing gas atmosphere such as H2 or NH3. In situ X-ray photoelectron spectroscopy reveals that the tantalum (oxide) getters the oxygen from the iron (oxide) by a diffusive solid-state process, driven by the much larger affinity to oxygen of Ta compared to Fe. We suggest that this redox-based mechanism is applicable to a wide range of metal (oxide)/catalyst systems and relevant to rational catalyst design in general heterogeneous catalysis.
Related Papers
- → Structure of Very Thin Tantalum and Molybdenum Films(1966)66 cited
- → Electrochemical Reduction of Tantalum Compounds in Ambient Temperature Melts(2007)2 cited
- → Native Tantalum(1910)1 cited
- RESEARCH ON THE BEHAVIOUR OF TANTALUM AND TANTALUM BASE ALLOYS AT HIGH TEMPERATURES.(1962)
- → Tantalum(2004)