Infrared studies of adsorption and surface reactions of some secondary alcohols, C3 to C5, on .gamma.-alumina and .gamma.-alumina doped with sodium hydroxide

Deo, A. V.; Chuang, T. T.; Lana, I. G. Dalla

doi:10.1021/j100672a009

Cited by 71 publications

(36 citation statements)

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“…Kiselev and Uvarov [737] found acetate on the surface of Ti0 2 after reaction with acetone. A similar observation was made with alumina, methane was observed on treatment with acetone [738,739] This reaction of acetone has also been observed with liquid sodium hydroxide at 525 K [740].…”

Section: Modification Of Metal Oxide Surfacessupporting

confidence: 70%

Nature and Estimation of Functional Groups on Solid Surfaces

1983

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Section: Modification Of Metal Oxide Surfacessupporting

confidence: 70%

Nature and Estimation of Functional Groups on Solid Surfaces

1983

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“…The adsorption/desorption of gas SO 2 on several porous substrates (e.g. carbons [22], alumina [23][24][25] and zeolites [25,26]) has been frequently dealt with by using IR spectroscopy as the characterisation tool. Several authors reported a vibrational band ranging from 1150 to 1120 cm − 1 when the surface is exposed to a 0.2-2% SO 2 feed at atmospheric base pressure and room temperature.…”

Section: Oxidation Of So 2 On Bare Goldmentioning

confidence: 99%

Electrochemical behaviour of aqueous SO2 at polycrystalline gold electrodes in acidic media. A voltammetric and in-situ vibrational study. Part II. Oxidation of SO2 on bare and sulphur-modified electrodes

Quijada

Morallón

Vázquez

et al. 2001

Electrochimica Acta

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The electrochemical oxidation of SO 2 on polycrystalline gold electrodes has been studied by means of cyclic voltammetry and in situ vibrational techniques. On bare gold electrodes, SO 2 is irreversibly oxidised on forward scans at 0.6 V/RHE, featuring a diffusion-limited peak. Oxidation is inhibited by the formation of chemisorbed oxygen. A SO 2 anodic current rise occurs on the reverse scan in parallel with the reduction of the metal oxide layers. As shown by FT-IR, oxidation proceeds to yield a mixture of soluble S(VI) species as stable reaction products. From vibrational spectra and results from the irreversible adsorption method, it follows that no strongly adsorbed S -O-like residues are present onto the gold surface in the region 0.3-0.5 V/RHE. On sulphur-modified electrodes improved electrocatalysis is manifested by the shift of the diffusion-limited peak to lower potentials. The best performance is observed at a sulphur coverage of 0.5. At higher coverage, sulphur adlayers impart lower catalytic efficiency and eventually show strong poisoning properties. This behaviour is exhibited by sulphur adlayers generated either in situ by SO 2 reduction or ex situ by sulphide adsorption/oxidation in acidic or alkaline media.

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“…1, alcohol can chemisorb by reaction of its hydroxyl group with surface hydroxyl groups of the alumina, thus forming a stable alkoxide and releasing water. This mechanism has been proven for different normal and secondary alcohol [12,[17][18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 80%