TY - JOUR
T1 - Interaction of N2 with Re(1120) in the presence of H2
AU - Haase, G.
AU - Asscher, M.
PY - 1987/12/11
Y1 - 1987/12/11
N2 - The effect of coadsorbed hydrogen on the molecular physisorption and dissociation of N2 on Re(1120) was studied under UHV conditions. It was found that the hydrogen blocks selectively the less tightly bound molecular physisorption site, α1. This blocking has no effect on the dissociation of N2 on this surface. The barrier of dissociative adsorption of N2 in the presence of coadsorbed hydrogen was determined to be 2.1± 0.4 kcal/mole. In contrast to the effect of hydrogen, CO preadsorption was found to reduce the population of the N2-α2 physisorption site, and also to decrease the probability for nitrogen dissociation, These results imply that α2 is a direct molecular precursor for the dissociative adsorption of N2 on Re(1120).
AB - The effect of coadsorbed hydrogen on the molecular physisorption and dissociation of N2 on Re(1120) was studied under UHV conditions. It was found that the hydrogen blocks selectively the less tightly bound molecular physisorption site, α1. This blocking has no effect on the dissociation of N2 on this surface. The barrier of dissociative adsorption of N2 in the presence of coadsorbed hydrogen was determined to be 2.1± 0.4 kcal/mole. In contrast to the effect of hydrogen, CO preadsorption was found to reduce the population of the N2-α2 physisorption site, and also to decrease the probability for nitrogen dissociation, These results imply that α2 is a direct molecular precursor for the dissociative adsorption of N2 on Re(1120).
UR - http://www.scopus.com/inward/record.url?scp=4243349623&partnerID=8YFLogxK
U2 - 10.1016/0009-2614(87)80930-2
DO - 10.1016/0009-2614(87)80930-2
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AN - SCOPUS:4243349623
SN - 0009-2614
VL - 142
SP - 241
EP - 245
JO - Chemical Physics Letters
JF - Chemical Physics Letters
IS - 3-4
ER -