| 초록 |
Selective hydrogenation of carboxylic acids is an organic reaction to produce valuable chemicals such as aldehydes, alcohols, and alkanes. However, the traditional supported bimetallic catalysts suffer from the low reactivity and selectivity. To overcome this, the bimetallic catalysts with uniform size and composition should be developed. In this study, for the selective hydrogenation of acetic acid to ethanol, PtRe/TiO2 catalysts that form highly dispersed bimetallic nanoparticles of uniform composition were prepared by a controlled synthesis method. For comparison, three synthetic methods were applied: in-situ catalytic reduction, ex-situ catalytic reduction, and incipient wetness impregnation. The physicochemical properties of the prepared catalysts were characterized using XRD, TEM-EDS, TPR and XPS. Overall, the catalyst prepared by the in-situ catalytic reduction formed highly dispersed bimetallic nanoparticles of uniform composition, and showed the highest conversion of ~70%. |
