Nitrate reduction in water: Influence of the addition of a second metal on the performances of the Pd/CeO₂ catalyst
2011
Devadas, Abirami | Vasudevan, Subramanyan | Epron, Florence
An attempt is made to improve the catalytic nitrate reduction on Pd/CeO₂ catalysts by the addition of a second metal. The influence of the second metal such as Sn, In and Ag on the Pd/CeO₂ for nitrate reduction is explored. The second metal is introduced over monometallic Pd/CeO₂ by a redox reaction. Pd/CeO₂ is more active than the bimetallic catalysts under pure hydrogen flow. Whereas in presence of CO₂ the monometallic Pd/CeO₂ 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/CeO₂ catalyst is comparatively the most suited for nitrate reduction.
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