XPS-SIMS study on the surface chemistry of commercially available activated carbons used as catalyst supports

Journal Article · Sat Feb 01 00:00:00 EST 1992 · Journal of Catalysis; (United States)

DOI:https://doi.org/10.1016/0021-9517(92)90254-F· OSTI ID:7162062

Albers, P; Deller, K; Despeyroux, B M; Schaefer, A; Seibold, K ^[1]

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1. Degussa AG, Hanau (Germany)

The specific surface properties of activated carbons used as support materials for precious metal catalysts were investigated by XPS and SIMS. The surface C/O ratios and changes in the spectrum of surface-functional groups after different chemical pretreatments were measured. A correlation between the differences in graphitic/aromatic and aliphatic carbon contributions and of hydrogen present on the carbonaceous surfaces and the corresponding XPS and SIMS signals has been observed. The influence of natural impurities of activated carbons on the catalytic activity of powdered-type catalysts and the effect of surface carbides on the precious metal dispersion on pelletized shell-type catalysts are presented. The information gives a better understanding of the interdependence between the surface chemistry of the activated carbon and the performance of the catalysts.

• OSTI ID: 7162062
• Journal Information: Journal of Catalysis; (United States), Vol. 133:2; ISSN 0021-9517
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ACTIVATED CARBON
SURFACE PROPERTIES
CATALYST SUPPORTS
AROMATICS
CARBIDES
CARBON
CATALYSTS
CATALYTIC EFFECTS
CHEMICAL PREPARATION
GRAPHITE
HETEROGENEOUS CATALYSIS
HYDROGEN
IMPURITIES
ION MICROPROBE ANALYSIS
MASS SPECTROSCOPY
OXYGEN
PHOTOELECTRON SPECTROSCOPY
QUANTITY RATIO
X-RAY SPECTROSCOPY
ADSORBENTS
CARBON COMPOUNDS
CATALYSIS
CHEMICAL ANALYSIS
ELECTRON SPECTROSCOPY
ELEMENTAL MINERALS
ELEMENTS
MICROANALYSIS
MINERALS
NONDESTRUCTIVE ANALYSIS
NONMETALS
ORGANIC COMPOUNDS
SPECTROSCOPY
SYNTHESIS
400201* - Chemical & Physicochemical Properties