Synthesis of PtSn nanoparticles on carbon materials by different preparation methods for selective catalytic hydrogenation of citral.

JULIETA STASSI, JONATHAN MENDEZ, JULIETA VILELLA, SERGIO DE MIGUEL, PATRICIA ZGOLICZ

Florencia

Congreso; 13th Europacat Congress 2017; 2017

PtSn catalysts wereprepared by two methods using two carbonaceous materials as support in order toevaluate the catalytic behavior in the selective hydrogenation of citral to thecorresponding unsaturated alcohols (UA). The methods used to prepare thecatalysts were: (i) conventional impregnation followed by reduction of themetallic precursors under H2-flow (CI) and (ii) deposition andreduction of the metallic precursors in liquid phase (RLP). Catalysts werecharacterized by different techniques and the catalytic behavior being correlatedwith the characteristics of the metallic phase. Results showed that theselectivity to UA strongly depends on the preparation method and the carbontype used. For catalysts prepared by CI, highly ordered PtSn alloys wereobtained with low loadings of Sn, while for catalysts prepared by RLP highlyordered phases with Sn ionic species intercalated in the metallic phase of Pt,were obtained with high loadings of Sn and the formation of PtSn complex.