Catalysis at experimentally designed surfaces: n-Butane hydrogenolysis at Sn/Group VIII surface alloys

Conference · Wed Jan 01 00:00:00 EST 1992

DOI:https://doi.org/10.1016/S0167-2991(08)64488-2· OSTI ID:5523965

Logan, A D; Paffett, M T

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; USDOE, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 5523965
• 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
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
36 MATERIALS SCIENCE
BUTANE
HYDROGENATION
ARRHENIUS EQUATION
AUGER ELECTRON SPECTROSCOPY
CATALYTIC EFFECTS
ELECTRON DIFFRACTION
HABIT PLANES
NICKEL BASE ALLOYS
PLATINUM BASE ALLOYS
SURFACES
TIN ALLOYS
ALKANES
ALLOYS
CHEMICAL REACTIONS
COHERENT SCATTERING
DIFFRACTION
ELECTRON SPECTROSCOPY
EQUATIONS
HYDROCARBONS
NICKEL ALLOYS
ORGANIC COMPOUNDS
PLATINUM ALLOYS
PLATINUM METAL ALLOYS
SCATTERING
SPECTROSCOPY
400201* - Chemical & Physicochemical Properties
360102 - Metals & Alloys- Structure & Phase Studies
360104 - Metals & Alloys- Physical Properties