Premium
The heterogeneous interaction of NO 2 with amorphous carbon
Author(s) -
Tabor Kevin,
Gutzwiller Lukas,
Rossi Michel J.
Publication year - 1993
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/93gl01434
Subject(s) - amorphous carbon , carbon fibers , amorphous solid , desorption , materials science , adsorption , torr , analytical chemistry (journal) , thermal desorption , yield (engineering) , mineralogy , chemistry , thermodynamics , environmental chemistry , crystallography , metallurgy , composite material , physics , composite number
From uptake measurements of NO 2 on solid amorphous carbon in the mTorr pressure range and at ambient temperature an accommodation coefficient for NO 2 of (4.8±0.6)·10 −2 has been measured. These experiments reveal a complex chemical mechanism. The only major product observed is NO whose yield corresponds to about 60% of the NO 2 adsorbed on the surface. Thermal desorption of a carbon sample that has been exposed to NO 2 yields CO and CO 2 along with some NO 3 and/or N 2 O 5 . H 2 O does not interact measurably at ambient temperature with the type of carbon used in the present study.