The CO+NO reaction over Pd: A combined study single-crystal planar-model-supported, and high-surface-area Pd/Al{sub 2}O{sub 3} catalysts

Journal Article · Tue Apr 01 04:00:00 EST 1997 · Journal of Catalysis

DOI:https://doi.org/10.1006/jcat.1997.1571· OSTI ID:563514

Rainer, D R; Vesecky, S M; Koranne, M ^[1]

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1. Texas A&M Univ., College Station, TX (United States); and others

A kinetics study of the CO + NO reaction over Pd has been carried out using single-crystal, model planar-supported, and conventional high-surface-area Pd/Al{sub 2}O{sub 3} catalysts. A pronounced structure sensitivity is evident that results in a rate enhancement over the Pd(111) single crystal relative to the more open (100) and (110) faces, and for larger supported particles relative to smaller ones. Temperature-programmed desorption (TPD) and X-ray photoelectron spectroscopy (XPS) data indicate that the Pd(100) face is more active for NO dissociation and atomic N stabilization than the close-packed (111) plane. Similarly, TPD results show that smaller particles in the model supported catalysts are more active for atomic N formation and stabilization. The inverse correlation between reaction activity and N, formation and stabilization suggests that an inactive atomic N species plays a role in determining the reaction rate. 33 refs., 11 figs., 1 tab.

• OSTI ID: 563514
• Journal Information: Journal of Catalysis, Journal Name: Journal of Catalysis Journal Issue: 1 Vol. 167; ISSN JCTLA5; ISSN 0021-9517
• Country of Publication: United States
• Language: English

Related Subjects

20 FOSSIL-FUELED POWER PLANTS
33 ADVANCED PROPULSION SYSTEMS
40 CHEMISTRY
ALUMINIUM OXIDES
CARBON MONOXIDE
CATALYST SUPPORTS
CATALYTIC EFFECTS
CHEMICAL REACTION KINETICS
HETEROGENEOUS CATALYSIS
NITRIC OXIDE
PALLADIUM
PHOTOELECTRON SPECTROSCOPY
TEMPERATURE DEPENDENCE
X-RAY SPECTROSCOPY