EFFECTS OF TiO//2 SURFACE SPECIES ON THE ADSORPTION AND COADSORPTION OF CO AND H//2 ON Ni

IMPLICATIONS FOR METHANATION OVER TiO//2-SUPPORTED Ni.

Gregory Raupp, J. A. Dumesic

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Temperature-programmed desorption (TPD) under ultra-high vacuum conditions of CO and H//2 from polycrystalline nickel surfaces containing varying amounts of titania showed that the effects of titania are short-ranged. Carbon monoxide adsorption was weakened while hydrogen adsorption was strengthened with increasing concentration of surface titania. Coadsorption measurements confirmed that hydrogen and CO compete for sites on nickel. Using adsorption and desorption kinetic parameters derived from the TPD experiments, calculations indicated that shifts in heats of adsorption due to the presence of titania may result in a one to two order of magnitude higher hydrogen adatom coverage under steady-state methanation conditions relative to a clean Ni surface.

Original languageEnglish (US)
Title of host publicationACS Symposium Series
EditorsR.T.K. Baker, S.J. Tauster, J.A. Dumesic
Place of PublicationWashington, DC, USA
PublisherACS
Pages34-47
Number of pages14
ISBN (Print)0841209553
StatePublished - 1986

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Methanation
Carbon Monoxide
Adsorption
Hydrogen
Temperature programmed desorption
Nickel
Adatoms
Ultrahigh vacuum
Kinetic parameters
Desorption
titanium dioxide
Experiments

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

Raupp, G., & Dumesic, J. A. (1986). EFFECTS OF TiO//2 SURFACE SPECIES ON THE ADSORPTION AND COADSORPTION OF CO AND H//2 ON Ni: IMPLICATIONS FOR METHANATION OVER TiO//2-SUPPORTED Ni. In R. T. K. Baker, S. J. Tauster, & J. A. Dumesic (Eds.), ACS Symposium Series (pp. 34-47). Washington, DC, USA: ACS.

EFFECTS OF TiO//2 SURFACE SPECIES ON THE ADSORPTION AND COADSORPTION OF CO AND H//2 ON Ni : IMPLICATIONS FOR METHANATION OVER TiO//2-SUPPORTED Ni. / Raupp, Gregory; Dumesic, J. A.

ACS Symposium Series. ed. / R.T.K. Baker; S.J. Tauster; J.A. Dumesic. Washington, DC, USA : ACS, 1986. p. 34-47.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Raupp, G & Dumesic, JA 1986, EFFECTS OF TiO//2 SURFACE SPECIES ON THE ADSORPTION AND COADSORPTION OF CO AND H//2 ON Ni: IMPLICATIONS FOR METHANATION OVER TiO//2-SUPPORTED Ni. in RTK Baker, SJ Tauster & JA Dumesic (eds), ACS Symposium Series. ACS, Washington, DC, USA, pp. 34-47.
Raupp G, Dumesic JA. EFFECTS OF TiO//2 SURFACE SPECIES ON THE ADSORPTION AND COADSORPTION OF CO AND H//2 ON Ni: IMPLICATIONS FOR METHANATION OVER TiO//2-SUPPORTED Ni. In Baker RTK, Tauster SJ, Dumesic JA, editors, ACS Symposium Series. Washington, DC, USA: ACS. 1986. p. 34-47
Raupp, Gregory ; Dumesic, J. A. / EFFECTS OF TiO//2 SURFACE SPECIES ON THE ADSORPTION AND COADSORPTION OF CO AND H//2 ON Ni : IMPLICATIONS FOR METHANATION OVER TiO//2-SUPPORTED Ni. ACS Symposium Series. editor / R.T.K. Baker ; S.J. Tauster ; J.A. Dumesic. Washington, DC, USA : ACS, 1986. pp. 34-47
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