%0 Journal Article
%T Pd-W and Pd-Mo catalysts for NO decomposition and NO/CO reduction reactions
%A Dallago
%A Rog¨¦rio M.
%A Baibich
%A Ione M.
%J Journal of the Brazilian Chemical Society
%D 2009
%I Sociedade Brasileira de Qu¨ªmica, SBQ
%R 10.1590/S0103-50532009000500011
%X pd/¦Ã-al2o3 catalysts with two different metal particle sizes were prepared from [pd(acac)2]. subsequently, the photochemical reaction of [m(co)6] (m = mo or w) in the presence of pd/¦Ã-al2o3 was used to prepare bimetallic pd-m/¦Ã-al2o3 catalysts. drifts ftir spectra of the catalyst surfaces prior to thermal decomposition showed unstable subcarbonyl [m(co)n] species. chemisorption and co/no adsorption results indicated a blockage of the pd active sites when the second metal was incorporated. the catalytic activity and the selectivity for the no/co reaction were higher for pd with higher particle size, but they were both inhibited when mo or w were incorporated. on the other hand, when the catalysts were tested for no decomposition, the presence of mo or w led to an increase in the catalytic activity, with optimal results observed in the presence of mo.
%K no decomposition
%K no/co reduction
%K palladium/alumina catalyst
%K molybdenum
%K tungsten.
%U http://www.scielo.br/scielo.php?script=sci_abstract&pid=S0103-50532009000500011&lng=en&nrm=iso&tlng=en