Published 1992 | Version v1
Book Metadata-only

Acid properties of catalysts as studied by CO adsorption

Creators

  • 1. Inst. fur Physikalische Chemie, Univ. Munchen, sophienstrabe II, 800 Munchen 2 (Germany)

Description

CO is a soft base and can therefore, be used as a highly specific probe for acid sites on oxide surfaces. Relative acidity sequences of Bronsted sites can be established based on the IR-hydroxyl frequency shifts when CO is adsorbed by H-bonding at 77 K. Coordination of CO onto coordinately unsaturated cation sites (Lewis acid sites) leads to cation-sensitive carbonyl stretching frequency shifts. The CO stretching band postions can be correlated with the electric field strength exerted by the cation. A universal correlation seems to exist. Applications of these principles for the study of binary oxides; zeolites, supported oxides and sulfides will be discussed in this paper

Additional details

Publishing Information

Publisher
American Chemical Society.
Imprint Place
Washington, DC (United States)
Imprint Title
Proceedings of octane and cetane enhancement processes for reduced-emissions motor fuels
Imprint Pagination
1010 p.
Journal Page Range
p. 987.

Conference

Title
American Chemical Society (ACS) national meeting.
Dates
5-10 Apr 1992.
Place
San Francisco, CA (United States).

INIS

Country of Publication
United States
Country of Input or Organization
United States
INIS RN
24032013
Subject category
S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; S74: ATOMIC AND MOLECULAR PHYSICS;
Resource subtype / Literary indicator
Conference
Descriptors DEI
ADSORPTION; BINARY MIXTURES; CARBONYLS; CATALYSTS; CATALYTIC EFFECTS; CATIONS; CHEMICAL BONDS; CHEMICAL SHIFT; HYDROGEN; HYDROXYL RADICALS; OXIDES; PETROLEUM REFINERIES; PROBES; SULFIDES; ZEOLITES
Descriptors DEC
CHALCOGENIDES; CHARGED PARTICLES; DISPERSIONS; ELEMENTS; INORGANIC ION EXCHANGERS; ION EXCHANGE MATERIALS; IONS; MATERIALS; MINERALS; MIXTURES; NONMETALS; OXYGEN COMPOUNDS; RADICALS; SILICATE MINERALS; SORPTION; SULFUR COMPOUNDS

Optional Information

Secondary number(s)
CONF-920444--.