INCAPE 05401
INSTITUTO DE INVESTIGACIONES EN CATALISIS Y PETROQUIMICA "ING. JOSE MIGUEL PARERA"
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Mechanism analysis of the water gas shift reaction over supported Pt catalysts
Autor/es:
CH. VIGNATTI; C.R. APESTEGUÍA; T.F. GARETTO
Lugar:
Salamanca-España
Reunión:
Congreso; EuropaCat IX; 2009
Resumen:
Platinum catalysts supported on SiO2, CeO2 and TiO2 were studied in WGS reaction. The CO conversion turnover rate was 1-2 orders of magnitude higher on platinum supported on Pt/CeO2 and Pt/TiO2 than on Pt/SiO2. DRIFTS results showed that the reaction occurs with formation of formate intermediates. The intensity of formate bands was lower on Pt/TiO2 catalysts than on Pt/CeO2. The lower stability of formate intermediates on Pt/TiO2 would explain the higher activity displayed by these catalysts. No formate bands were detected on Pt/SiO2 suggesting that the reaction on this catalyst occurs via a redox mechanism.
