title: Nitrate reduction in water: influence of the addition of a second metal on the performances of the Pd/CeO(2) catalyst.
abstract: An attempt is made to improve the catalytic nitrate reduction on Pd/CeO(2) catalysts by the addition of a second metal. The influence of the second metal such as Sn, In and Ag on the Pd/CeO(2) for nitrate reduction is explored. The second metal is introduced over monometallic Pd/CeO(2) by a redox reaction. Pd/CeO(2) is more active than the bimetallic catalysts under pure hydrogen flow. Whereas in presence of CO(2) the monometallic Pd/CeO(2) is inactive for nitrate reduction, bimetallic catalysts are found to be more active than under pure hydrogen flow and also than the monometallic catalyst with a low selectivity towards ammonium ions, undesired product of the reaction. The Pd-Sn/CeO(2) catalyst is comparatively the most suited for nitrate reduction.
authors.affiliation: Laboratoire de Catalyse en Chimie Organique UMR6503, CNRS-Université de Poitiers, 40 Avenue du Recteur Pineau, 86022 Poitiers Cedex, France.
authors.forename: Abirami
authors.initials: A
authors.lastname: Devadas
authors.forename: Subramanyan
authors.initials: S
authors.lastname: Vasudevan
authors.forename: Florence
authors.initials: F
authors.lastname: Epron
mesh_terms: D002245:Carbon Dioxide / Q000737:chemistry; D002384:Catalysis; D002563:Cerium / Q000737:chemistry*; D046529:Microscopy, Electron, Transmission; D009566:Nitrates / Q000737:chemistry*; D010084:Oxidation-Reduction; D010165:Palladium / Q000737:chemistry*; D014001:Tin / Q000737:chemistry; D014867:Water / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D009566:Nitrates; D014867:Water; D002245:Carbon Dioxide; D002563:Cerium; D010165:Palladium; C030583:ceric oxide; D014001:Tin