Catalysis at experimentally designed surfaces: n-Butane hydrogenolysis at Sn/Group VIII surface alloys
Bimetallic {radical}3x{radical}3R30{degrees}-Sn/M(111) [M=Ni, Pt] surface alloys have been prepared in an ultrahigh vacuum system and used in model moderate pressure (1--200 Torr) catalytic reactions. Hydrogenolysis of n-butane (H{sub 2}/n-C4=20) has been used to characterize the effects of ordered bimetallic ensembles relative to those available at the respective (111) surfaces. The effect of alloying Sn into the Ni(111) surface produced an overall lowering of the catalytic reactivity nearly equal to the number of Ni surface sites lost upon producing the {radical}3x{radical}3R30{degrees} surface alloy. In addition, the overall rate of hydrogenolysis of n-butane at the {radical}3x{radical}R30{degrees}-Sn/Pt(111) surface alloy was also found to have decreased (although not in proportion to the loss of total Pt atoms). Catalytic deactivation due to carbon buildup was observed to decrease significantly at both of the ordered {radical}3x{radical}3R30{degrees}-Sn/M(111) surface alloys under reaction conditions.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 10120889
- Report Number(s):
- LA-UR-92-40; CONF-920701-1; ON: DE92007424
- Resource Relation:
- Journal Volume: 75; Conference: 10. international congress on catalysis,Budapest (Hungary),19-24 Jul 1992; Other Information: PBD: [1992]
- Country of Publication:
- United States
- Language:
- English
Similar Records
N-butane hydrogenolysis at Sn/Pt(111) surface alloys
Adsorption and desorption behavior of n-butane and isobutane on Pt(111) and Sn/Pt(111) surface alloys
Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
36 MATERIALS SCIENCE
BUTANE
HYDROGENATION
SURFACES
CATALYTIC EFFECTS
NICKEL BASE ALLOYS
PLATINUM BASE ALLOYS
TIN ALLOYS
HABIT PLANES
ELECTRON DIFFRACTION
AUGER ELECTRON SPECTROSCOPY
ARRHENIUS EQUATION
400201
360102
360104
CHEMICAL AND PHYSICOCHEMICAL PROPERTIES
STRUCTURE AND PHASE STUDIES
PHYSICAL PROPERTIES