Comparison of Pd-contaiing catalysts for oxydation reactions by TP-methods

internationa

Zr—P-modification of the γ-Al2O3 support of cobalt-containing catalysts for the Fischer—Tropsch synthesis

The cobalt-containing catalysts based on alumina modified by zirconium and phosphorus additives were synthesized for the Fischer—Tropsch synthesis. Zirconium cations and phosphate anions are adsorbed onto the surface of the support oxide phase (γ-Al2O3) or incorporated into cobalt-containing oxide. The modification of the support probably prevents the insertion of cobalt cations into γ-Al2O3and favors the formation of larger Co—Al oxide particles with the spinel-like structure. The cobalt systems based on the unmodified support have the highest catalytic activity in the Fischer—Tropsch synthesis at 230 °С (~10 mmolСО (gcat h)–1 at a СО conversion of 20–23%)

Ag/CeO2 Composites for Catalytic Abatement of CO, Soot and VOCs

Nowadays catalytic technologies are widely used to purify indoor and outdoor air from harmful compounds. Recently, Ag–CeO2 composites have found various applications in catalysis due to distinctive physical-chemical properties and relatively low costs as compared to those based on other noble metals. Currently, metal–support interaction is considered the key factor that determines high catalytic performance of silver–ceria composites. Despite thorough investigations, several questions remain debating. Among such issues, there are (1) morphology and size effects of both Ag and CeO2 particles, including their defective structure, (2) chemical and charge state of silver, (3) charge transfer between silver and ceria, (4) role of oxygen vacancies, (5) reducibility of support and the catalyst on the basis thereof. In this review, we consider recent advances and trends on the role of silver–ceria interactions in catalytic performance of Ag/CeO2 composites in low-temperature CO oxidation, soot oxidation, and volatile organic compounds (VOCs) abatement. Promising photo- and electrocatalytic applications of Ag/CeO2 composites are also discussed

Zr—P-modification of the γ-Al2O3 support of cobalt-containing catalysts for the Fischer—Tropsch synthesis

The cobalt-containing catalysts based on alumina modified by zirconium and phosphorus additives were synthesized for the Fischer—Tropsch synthesis. Zirconium cations and phosphate anions are adsorbed onto the surface of the support oxide phase (γ-Al2O3) or incorporated into cobalt-containing oxide. The modification of the support probably prevents the insertion of cobalt cations into γ-Al2O3and favors the formation of larger Co—Al oxide particles with the spinel-like structure. The cobalt systems based on the unmodified support have the highest catalytic activity in the Fischer—Tropsch synthesis at 230 °С (~10 mmolСО (gcat h)–1 at a СО conversion of 20–23%)