Surface and bulk reactions of carbon tetrachloride with titanium dioxide

Effect of lanthanum on the catalytic properties of PtSn/γ-Al2O3 bimetallic catalysts prepared by successive impregnation and controlled surface reaction

“…8. The IR spectra of CO adsorbed on the monometallic P/A and on the bimetallic PS/A-SI catalysts show similar CO-IR position absorption bands at 2067-2066 and 2120-2119 cm −1 , assigned to carbon monoxide bonded to platinum atoms in a linear form [24] and to linear CO chemisorbed on Pt atoms on oxidized state, respectively [25][26][27]. Chlorine effects are not discarded as being responsible for the 2119-2120 cm −1 absorption band.…”

Nature and Estimation of Functional Groups on Solid Surfaces

“…On treatment of Ti0 2 (anatase) with anhydrous HCl at 298 K, a quantity of chloride was found on the surface after evacuation that corresponded to the original OH content [445]. It was shown by infrared spectroscopy that the OH groups were not all replaced by Cl; the water produced is retained on the surface, and species like Ti 4 +(H 2 0) Cl-and H 3 0+Cl-were observed [722,723]. On outgassing, HCl is evolved, and the chloride content approaches half the original hydroxyl content at 513 K [445].…”

Volcano relationships in metal cluster catalysis: An infrared spectroscopic monitor of site character

“…Sites providing strong reactant adsorption will also bond strongly to .band-3 CO-ligands, resulting in extensive electron donation into anti-bonding orbitals on the carbon and thereby weakening the carbon-oxygen bond. The effect is analogous to that of electron donating adsorbates on the frequency of CO adsorbed on platinum [21]. On this basis, for each correlation in Fig.…”