| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 40841 | Applied Catalysis A: General | 2012 | 6 Pages |
Enantioselective hydrogenation of α-phenylcinnamic acid was investigated on Pd/C catalysts prepared in our laboratory to compare activity and selectivity with those on commercial Pd/C and Pd/TiO2 catalysts. The Pd/C catalysts after the 353 K-H2-pretreatment exhibited satisfactory and comparable performances obtained with commercially available best ever Pd/C by optimizing catalyst preparation. In contrast to Pd/TiO2, a high loading of Pd is not necessary with Pd/C, but only 5% loading on a certain activated carbon was found to result in high e.e. It is suggested that the optimum size or size-distribution of Pd metal particle are different between the two supports, suggesting a support effect of this catalyst system.
Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (125 K)Download as PowerPoint slideHighlights► Cinchonidine-modified catalysts were prepared with eggshell and homogeneous Pd/C. ► Optimized loading of Pd on the carbon was only 5%. ► The best prepared Pd/C showed identical performance with the commercial best Pd/C. ► The H2-pretreatment prior to the CD-modification was also effective for the freshly prepared catalyst. ► The properties of Pd/C in enantioselective hydrogenation were different from those of Pd/TiO2.
