Observation of molecular reaction intermediate and reaction mechanism for NO dissociation and NO-H{sub 2} reaction on Rh-Sn/SiO{sub 2} catalysts

Journal Article · Thu Nov 30 23:00:00 EST 1995 · Journal of Catalysis

DOI:https://doi.org/10.1006/jcat.1995.1312· OSTI ID:224017

Tomishige, Keiichi; Asakura, Kiyotaka; Iwasawa, Yasuhiro ^[1]

---

1. Univ. of Tokyo (Japan)

The Rh-Sn/SiO{sub 2} catalyst prepared by the selective reaction between Sn (CH{sub 3}){sub 4} vapor and Rh particles on SiO{sub 2} was remarkably active for the NO dissociation and the catalytic NO-H{sub 2} reaction. To obtain structural information on the behavior of molecularly adsorbed intermediates related to the high activity of the bimetallic ensemble catalyst surface, in situ EXAFS and FTIR were employed, in parallel with reaction kinetics. We observed the molecular reaction intermediate, bent-type NO, by EXAFS with the aid of FTIR. The reaction mechanism is discussed on the basis of the characterization of adsorbed species and surface bimetallic structure. 21 refs., 11 figs., 2 tabs.

• OSTI ID: 224017
• Journal Information: Journal of Catalysis, Journal Name: Journal of Catalysis Journal Issue: 2 Vol. 157; ISSN 0021-9517; ISSN JCTLA5
• Country of Publication: United States
• Language: English

Related Subjects

20 FOSSIL-FUELED POWER PLANTS
33 ADVANCED PROPULSION SYSTEMS
40 CHEMISTRY
CATALYSTS
CATALYTIC EFFECTS
CHEMICAL REACTION KINETICS
DISSOCIATION
HYDROGENATION
NITRIC OXIDE
REACTION INTERMEDIATES
RHODIUM
SILICA
TIN
X-RAY SPECTROSCOPY