Studies of the coadsorption of deuterium and carbon monoxide with silver on rhodium and the adsorption of 2,4,6-trinitrotoluene on clean and carbon covered platinum

Thesis/Dissertation · Sat Jan 01 04:00:00 EST 1983

OSTI ID:5676710

Peebles, H C

Ag adsorbed on Rh(100) is presented as a model of the corresponding bimetallic catalyst. Ag overlayer growth follows the Frank-Van der Merwe growth mechanism at 300 K and the Stranski-Krastanov growth mechanism at 640 K. Ag(3d) binding energies are found to track the vacuum level rather than the Fermi level. The results of D/sub 2/ and CO adsorption studies on Ag/Rh(100) show that adsorbed Ag does not significantly alter the properties of adjacent D/sub 2/ or CO adsorption sites on the Rh(100) surface. The desorption and decomposition of 2,4,6-trinitrotoluene (TNT) on clean and carbon covered Pt(111) is also reported. No evidence for TNT decomposition on the carbon covered surface is found. Molecular TNT desorption kinetics at low coverage are first order, yielding an activation energy of 16.7 +/- 1 Kcal/mol and a preexponential factor of 2.3 x 10/sup 11/ (x e/sup - + 0.5/) sec/sup -1/. TNT adsorbed on the clean Pt(111) surface at submonolayer coverages undergoes almost complete decomposition during heating. The major decomposition products are H/sub 2/O, NO, CO/sub 2/, CO, HCN, and a carbon residue left on the surface. TNT adsorbed in the second and higher monolayers desorbs molecularly. The significance of these results in understanding the performance of a commercial explosive vapor preconcentrator is discussed.

• OSTI ID: 5676710
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
400301 -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ACTIVATION ENERGY
ADSORPTION
CARBON
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL EXPLOSIVES
CHEMICAL REACTIONS
DATA
DECOMPOSITION
DESORPTION
DEUTERIUM
ELEMENTS
ENERGY
EXPERIMENTAL DATA
EXPLOSIVES
HYDROGEN ISOTOPES
INFORMATION
ISOTOPES
LIGHT NUCLEI
METALS
NITRO COMPOUNDS
NONMETALS
NUCLEI
NUMERICAL DATA
ODD-ODD NUCLEI
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PLATINUM
PLATINUM METALS
RHODIUM
SILVER
SORPTION
SORPTIVE PROPERTIES
STABLE ISOTOPES
SURFACE PROPERTIES
TNT
TRANSITION ELEMENTS