Thermal decomposition of the [Pt(NH3)4]2+
complex in nax zeolite: effect of calcination procedure |
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Authors: | A C Camacho Rodrigues J L Fontes Monteiro |
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Institution: | 1. NUCAT/PEQ/COPPE/UFRJ, Universidade Federal
do Rio de Janeiro, Ilha do Fund?o, Rio de Janeiro, Brazil, 68502 21945-970
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Abstract: | The effect of the calcination procedure on the decomposition
of the Pt(NH3)4]2+
complex in a NaX zeolite was studied by mass spectrometry (MS-TPDE) and diffuse
reflectance spectroscopy (DRS). The decomposition of the complex took place
in two steps. In the first step, under oxygen, the Pt(NH3)4]2+
complex was first converted to Pt(NH3)2]2+
complex, accompanied by nitrogen release. In the second step, corresponding
to the decomposition of the remaining two amine ligands, NO formation was
also observed. Under He, the decomposition also occurred in two steps with
H2 liberation. A reaction scheme was proposed for these
results. |
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Keywords: | mass spectrometry nitrogen oxide platinum thermal decomposition zeolite X |
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