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
- 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, Vol. 167, Issue 1; Other Information: PBD: 1 Apr 1997
- Country of Publication:
- United States
- Language:
- English
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