Thermodynamics of sulfur chemisorption on metals. IV. Alumina-supported platinum

Journal Article · Fri Jul 01 00:00:00 EDT 1983 · J. Catal.; (United States)

DOI:https://doi.org/10.1016/0021-9517(83)90120-3· OSTI ID:5054680

McCarty, J G; Sancier, K M; Wise, H

Isosteric heats of chemisorption of sulfur on alumina-supported platinum catalysts have been determined as a function of surface coverage resulting from exposure to H/sub 2/S/H/sub 2/ gas mixtures. At low coverage the heat of chemisorption with reference to 1/2 S/sub 2/(g) is -208 +/- 11 kJ x mol/sup -1/. The heat of chemisorption decreases to -177 kJ x mol/sup -1/ at half saturation coverage. Except at very low coverage, the thermodynamic activity of sulfur chemisorbed on platinum is greater than that of iron, nickel, cobalt, and ruthenium.

• Research Organization: SRI International, Menlo Park, CA
• OSTI ID: 5054680
• Journal Information: J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 82:1; ISSN JCTLA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CATALYST SUPPORTS
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMISORPTION
COBALT
ELEMENTS
IRON
METALS
NICKEL
NONMETALS
OXIDES
OXYGEN COMPOUNDS
PLATINUM
PLATINUM METALS
RUTHENIUM
SEPARATION PROCESSES
SORPTION
SORPTIVE PROPERTIES
SULFUR
SURFACE PROPERTIES
THERMODYNAMICS
TRANSITION ELEMENTS