Ultrahigh vacuum temperature-programmed desorption of CO and D/sub 2/ from silica-supported ruthenium: evidence for spillover of D/sub 2/

Journal Article · Wed Jan 01 04:00:00 EST 1986 · J. Catal.; (United States)

OSTI ID:5369747

Kakuta, N; White, J M

The ultrahigh vacuum temperature-programmed desorption of D/sub 2/ and CO from silica-supported Ru was studied. Features attributed to D/sub 2/ spillover were observed for doses at temperatures above 323 K. The CO desorption spectra were broad and indicated a very heterogeneous distribution of adsorption sites but no spillover. The desorption of predosed D/sub 2/ from coadsorbed D/sub 2/ + CO showed that CO displaces weakly bound D(a) causing the D/sub 2/ desorption peak to shift to higher temperatures. Preadsorbed D(a) caused no changes in the desorption of CO. A small amount of CD/sub 4/ desorbed when CO and D were coadsorbed. The potential catalytic role of the spillover D(a) is discussed.

• Research Organization: Univ. of Texas, Austin (USA)
• OSTI ID: 5369747
• Journal Information: J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 97:1; ISSN JCTLA
• Country of Publication: United States
• Language: English

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