High methanation activity of titania-supported Pd catalyst in the SMSI state

Journal Article · Tue Dec 01 04:00:00 EST 1987 · J. Catal.; (United States)

DOI:https://doi.org/10.1016/0021-9517(87)90200-4· OSTI ID:5232552

Mori, T; Taniguchi, S; Mori, Y; Hattori, T; Murakami, Y

Concerning the hydrogenation of CO on titania-supported metal catalysts, there seems to be serious controversy about the high activity in their strong metal-support interaction (SMSI) state. This controversy may have been caused by the evaluation of the activity on the basis of turnover frequency (TOF), which is determined by dividing a reaction rate by the number of active sites. Because of the drastic decrease in the chemisorption ability of the SMSI catalyst, it is difficult to determine exactly the amount of H/sub 2/ or CO adsorbed and therefore to evaluate the exact number of the active sites on this catalyst. The authors have developed the pulse surface reaction rate analysis (PSRA) method in order to determine the reaction rate per active site and demonstrated its applicability to CO hydrogenation. By applying this method to methanation on titania-supported noble-metal catalysts, the authors find unambiguously that the intrinsic activity of the Pd and Pt catalysts in their SMSI state is 5 to 10 times larger than that in their normal state, although, on these catalysts, as a consequence of SMSI, the chemisorption ability for CO decreases to ca. 1/20 of the original amount. 8 references.

• Research Organization: Government Industrial Research Institute, Nagoya (Japan)
• OSTI ID: 5232552
• Journal Information: J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 108:2; ISSN JCTLA
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010408* -- Coal
Lignite
& Peat-- C1 Processes-- (1987-)
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CATALYST SUPPORTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMISORPTION
CLASSIFICATION
ELEMENTS
HYDROGEN
HYDROGENATION
MEASURING METHODS
METALS
METHANATION
NONMETALS
OXIDES
OXYGEN COMPOUNDS
PALLADIUM
PLATINUM
PLATINUM METALS
SEPARATION PROCESSES
SORPTION
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS