Published November 1976
| Version v1
Journal article
Infrared study of the adsorption and oxidation of ammonia on platinum
Description
The adsorption of NH2 on silica-supported platinum and on oxidized silica-supported platinum has been examined using infrared spectroscopy. Spectra for all H/D mixed isotopic species and for adsorbed 15NH3 indicate that ammonia only coordinates to the bare Pt surface and is stable up to about 2500C. There was no evidence for dissociative chemisorption. All spectral features disappeared when a large dose of O2 was added, but with micromole doses, new spectral features were observed which were tentatively assigned to Pt:NHO as an intermediate in the oxidation. On oxidized Pt, it has been suggested that NH3 dissociates to give PtONH2 at 200C which further dissociates near 1000C to form a bridged (PtO)2NH structure
Additional details
Additional titles
- Augmented title (English)
- 20 to 200"0C
Identifiers
Publishing Information
- Journal Title
- Journal of Catalysis
- Journal Volume
- 45
- Journal Issue
- 2
- Series
- J. Catal.
- Journal Page Range
- 151-162
- ISSN
- 0021-9517
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 8320679
- Subject category
- S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
- Descriptors DEI
- ADSORPTION; AMMONIA; CATALYSIS; DEUTERIUM; INFRARED SPECTRA; INTERMEDIATE STRUCTURE; ISOTOPE EFFECTS; OXIDATION; OXYGEN; PLATINUM; SILICON OXIDES
- Descriptors DEC
- CHALCOGENIDES; CHEMICAL REACTIONS; ELEMENTS; HYDRIDES; HYDROGEN COMPOUNDS; HYDROGEN ISOTOPES; ISOTOPES; LIGHT NUCLEI; METALS; NITROGEN COMPOUNDS; NITROGEN HYDRIDES; NONMETALS; NUCLEI; ODD-ODD NUCLEI; OXIDES; OXYGEN COMPOUNDS; PLATINUM METALS; SILICON COMPOUNDS; SPECTRA; STABLE ISOTOPES; TRANSITION ELEMENTS
Optional Information
- Notes
- Updated automatically by Metadata and Full-Text Enrichment Agent