Structure of Pd/CeO(sub x)/AI2O3 catalysts for NO(sub x) reduction determined by in situ X-ray absorption spectroscopy

Article Abstract:

The oxidation state and structural parameters of CeO(sub x)/AI2O3 and Pd/CeO(sub x)/AI2O3 catalysts during the reduction of NO by CO as characterized by in situ X-ray absorption spectroscopy at the Ce L(sub 111) edge and Pd K is described. Chemisorbed oxygen and/or a surface oxide layer that can be completely removed by exposure to CO at 573 K is formed when exposed to Pd particles, is reported.

Industrial Gas Manufacturing, Industrial gases, Nitrogen Oxide Gases, Cerium & Compounds, Nitrogen oxides, Nitrogen oxide, Structure, Cerium

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Investigation of Pd leaching from supported Pd catalysts during the Heck reaction

Article Abstract:

Palladium supported on amorphous silica, mercapto-functionalized silica, amine functionalized silica, and zeolite Y is studied as a catalyst in the Heck reaction of iodobenzene with butyl acrylate in the presence of triethylamine base and dimethylformamide solvent. Two different paths of Pd leaching that depend on the chemical state of the Pd are elucidated and are found to be consistent.

Analysis, Catalysis

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X-ray and IR spectroscopy of barium-promoted, zeolite-supported ruthenium catalysts for ammonia synthesis

Article Abstract:

The structure of the ruthenium clusters and the nature of barium as a promoter for ammonia on zeolite-supported rutherium catalysts are clarified. An addition of excess (occluded) barium to zeolite-supported Ru increased the turnover frequency for ammonia synthesis.

All Other Miscellaneous Chemical Product and Preparation Manufacturing, Catalysts, Chemical preparations, not elsewhere classified, Ruthenium, Barium

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