Palladium nanoparticle's surface structure and morphology effect on the catalytic activity for dry reforming of methane
- Costilla, Ignacio Oscar
- Sanchez, Miguel Dario
- Gigola, Carlos Eugenio
DOIAbstract
Low loaded Pd/α-Al 2 O 3 catalysts (<0.5 wt% Pd) were characterized and tested for CH 4 reforming with CO 2 at 650 °C. The catalysts were prepared by a recharging procedure, using an organometallic precursor, followed by intermediate washing and calcination steps. FTIR spectra of adsorbed CO showed that the Pd surface structure and the particle size were dependent on the number of post-impregnation washing steps. A catalyst sample with a metal dispersion of 33% showing well defined low-index planes (by FTIR) and nearly spherical particles (by TEM) was obtained using two-washing steps. In the reaction, it exhibited a high initial activity followed by a pronounced deactivation due to carbon nanofiber's formation and sintering. TEM analysis of...
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