Influence of carrier doping on the interaction of benzene and toluene with supported rhodium

Journal Article · Sat Apr 01 04:00:00 EST 1995 · Journal of Catalysis

DOI:https://doi.org/10.1006/jcat.1995.1087· OSTI ID:70259

Ioannides, T; Tsapatsis, M; Koussathana, M; Verykios, X E ^[1]

---

1. Univ. of Patras (Greece)

The interaction of benzene and toluene with rhodium crystallites dispersed on TiO{sub 2} carriers doped with W{sup 6+} cations of variable concentration is investigated employing steady-state hydrogenation, competitive hydrogenation, temperature-programmed desorption (TPD) and temperature-programmed surface reaction (TPSR). Turnover frequencies of both hydrogenation reactions are enhanced when Rh is dispersed on W{sup 6+}-doped TiO{sub 2}, while the ratio of the adsorption coefficients of toluene to benzene is reduced. The latter result implies that the toluene-Rh interaction has been weakened to a larger extent than the benzene-Rh interaction. TPD and TPSR experiments also reveal weakened adsorption bonds of benzene and toluene with Rh supported on doped TiO{sub 2}. These observations are discussed with respect to short-range and long-range electronic interactions at the metal-support interface, evoking the theory of metal-semiconductor contacts. 45 refs., 9 figs., 4 tabs.

• OSTI ID: 70259
• Journal Information: Journal of Catalysis, Journal Name: Journal of Catalysis Journal Issue: 2 Vol. 152; ISSN 0021-9517; ISSN JCTLA5
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
40 CHEMISTRY
BENZENE
CATALYST SUPPORTS
CRYSTAL DOPING
HYDROGENATION
RHODIUM
SORPTION
SORPTIVE PROPERTIES
TEMPERATURE DEPENDENCE
TITANIUM OXIDES
TOLUENE