Studies of the interactions of H/sub 2/ and CO with Pd/TiO/sub 2/ and TiO/sub 2/-promoted Pd/SiO/sub 2/

Journal Article · Sun Jun 01 04:00:00 EDT 1986 · J. Catal.; (United States)

OSTI ID:5330192

Rieck, J S; Bell, A T

The interactions of H/sub 2/ and CO with PdSiO/sub 2/, PdTiO/sub 2/, and titania-promoted PdSiO/sub 2/ have been investigated using temperature-programmed desorption and temperature-programmed surface reaction. In the presence of TiO/sub 2/, as a support or promoter, a portion of the TiO/sub 2/ is reduced to TiO/sub x/ moieties which decorate the surfaces of the Pd particles. These species cause a suppression in chemisorption of H/sub 2/ and CO, the magnitude of which is a function of the catalyst reduction temperature. The TiO/sub x/ moieties have little influence on distribution of H/sub 2/ adstates but cause a noticeable change in CO adstates. Decoration of Pd by TiO/sub x/ moieties also aids the dissociation of CO, and raises thereby the activity for CH/sub 4/ synthesis relative to that for PdSiO/sub 2/. 58 references

• Research Organization: Lawrence Berkeley Lab., CA (USA)
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 5330192
• Journal Information: J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 99:2; ISSN JCTLA
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010408* -- Coal
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& Peat-- C1 Processes-- (1987-)
ALKANES
CARBON COMPOUNDS
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CATALYSIS
CATALYST SUPPORTS
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PALLADIUM
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PROMOTERS
SEPARATION PROCESSES
SILICON COMPOUNDS
SILICON OXIDES
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