Reactions on mineral dust.

A case study: surface chemistry and surface structure of catalytic aluminas, as studied by vibrational spectroscopy of adsorbed species

Infrared spectrometric studies of the surface basicity of metal oxides and zeolites using adsorbed probe molecules

This review article deals with recent progress in the preparation of sulfated zirconia (SZ)-bassed, strong solid-acid catalysts, the characterization of their physicochemical properties and the evaluation of their catalytic performance in various promising applications. Strong emphasis was put on discussion of controversial issues such as the strength of acid sites, the nature of active sites, the reaction mechanism, and the role and state of supported platinum. An important part of this work was devoted to recent catalytic applications.

Sulfated Zirconia-Based Strong Solid-Acid Catalysts: Recent Progress

Acid catalysts in industrial hydrocarbon chemistry.

The structure and stability of sulfated alumina and titania

Effects of crystallinity and morphology on the surface properties ofalumina

Adsorption of CS2 on a series of metal oxides (Al2O3, ZrO2, ZnO and CeO2) activated at 723 or 973 K was studied at room temperature by FT-IR spectroscopy. In addition to hydrogen thiocarbonate and carbonate species, a new species, characterized by bands in the 1200–1000 cm−1 range, was evidenced. Its amount increased by increasing activation temperature of metal oxides. Co-adsorption experiments of CS2 with either CO2 or pyridine showed that its adsorption sites are mainly those giving rise to bidentate carbonates from CO2. Experiments on ZrO2 preechanged by H218O confirmed CS2 adsorption on basic O2− sites. Xanthate (COS2)2− species formation was proposed. Results were compared with metal oxide basicity and a nice agreement was observed. However, on ceria, carbonates formation easily occurred from CS2 adsorption, even at room temperature, suggesting that CS2 can probe both surface basicity, through the intensity of bands due to xanthate species, and surface oxygen mobility, involved in the surface transformation of xanthate into carbonate species.

IR study of CS2 adsorption on metal oxides: relation with their surface oxygen basicity and mobility

Effect of Sodium on the Adsorption of SO2 on Al2O3 and on Its Reaction with H2S

Comment on the adsorption of hydrogen sulfide on alumina

A. B. Mohammed Saad

Papers

The structure and stability of sulfated alumina and titania

Effects of crystallinity and morphology on the surface properties ofalumina

IR study of CS2 adsorption on metal oxides: relation with their surface oxygen basicity and mobility

Effect of Sodium on the Adsorption of SO2 on Al2O3 and on Its Reaction with H2S

Comment on the adsorption of hydrogen sulfide on alumina