Laboratoire de Catalyse en Chimie Organique UMR6503, CNRS-Université de Poitiers, 40 Avenue du Recteur Pineau, 86022 Poitiers Cedex, France.
J Hazard Mater. 2011 Jan 30;185(2-3):1412-7. doi: 10.1016/j.jhazmat.2010.10.063. Epub 2010 Oct 23.
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.
试图通过添加第二种金属来提高 Pd/CeO(2)催化剂对硝酸盐的催化还原性能。研究了第二种金属（如 Sn、In 和 Ag）对 Pd/CeO(2)用于硝酸盐还原的影响。第二种金属通过氧化还原反应被引入单金属 Pd/CeO(2)中。在纯氢气流中，Pd/CeO(2)比双金属催化剂更具活性。而在 CO(2)存在下，单金属 Pd/CeO(2)对硝酸盐还原无活性，双金属催化剂的活性比纯氢气流下更高，且对铵离子（反应的不期望产物）的选择性也比单金属催化剂低。Pd-Sn/CeO(2)催化剂是最适合用于硝酸盐还原的。
