Nitrate reduction in water: influence of the addition of a second metal on the performances of the Pd/CeO(2) catalyst |
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Authors: | Devadas Abirami Vasudevan Subramanyan Epron Florence |
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Affiliation: | Laboratoire de Catalyse en Chimie Organique UMR6503, CNRS-Université de Poitiers, 40 Avenue du Recteur Pineau, 86022 Poitiers Cedex, France. |
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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. |
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