Reaction of Methanol with Porous Silicon
Abstract
The reaction of both porous silicon and hydrogen covered (passivated) porous silicon with methanol was investigated. Adsorption of methanol onto porous silicon at 300 K resulted in cleavage of the 0-H bond and formation of Si-OCH3 and Si-H surface species. Heating of these surface species to approx. 500 K caused breakage of both the C-0 and C-H bonds. This resulted in the formation of Si-H surface species and the incorporation of oxygen and carbon into the porous silicon layer. Attempts to adsorb methanol onto passivated porous silicon proved unsuccessful until removal of the Si-H surface species commenced at 600 K. In addition to oxygen and carbon incorporation, Si-OCH3, Si- CH3, and Si-H surface species were observed when excess CH30H (g) was used to drive the decomposition reaction. The stability of the Si-CH3 species when excess CH30H (g) was present is likely due to oxygen and/or carbon passivation of the silicon surface. Silicon, Methanol, Porous silicon, Methoxy, Infrared spectroscopy, Surface chemistry
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 06, 1994
- Accession Number
- ADA285518
Entities
People
- E. A. Wovchko
- J. A. Glass Jr.
- J. T. Yates Jr.
Organizations
- University of Pittsburgh