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Aqueous‐Phase Hydrogenation of Saturated and Unsaturated Ketones and Aldehydes over Supported Platinum–Rhenium Catalysts
- Source :
- ChemCatChem. 8:1074-1083
- Publication Year :
- 2016
- Publisher :
- Wiley, 2016.
-
Abstract
- The hydrogenation rates of C=C and C=O bonds in methyl vinyl ketone and crotonaldehyde were measured over a series of silica-supported Pt-Re catalysts (1:1 atomic ratio of Pt/Re) in liquid water with H2 (15 psig) at 333 K. The hydrogenation of methyl vinyl ketone did not produce any unsaturated alcohol because of the rapid hydrogenation of C=C relative to that of C=O. The addition of Re to Pt impacted the rate of C=C hydrogenation negatively in methyl vinyl ketone and crotonaldehyde, but promoted the selectivity of C=O hydrogenation in crotonaldehyde in which the unsaturated alcohol increased from 5 % on Pt to 21 % on Pt-Re. The addition of Re to Pt also promoted the rate of C=O hydrogenation in 2-butanone, whereas little effect was observed during the hydrogenation of butanal. The results of electron microscopy and H2 chemisorption on the Pt-Re catalysts showed the increasing interaction between Pt and Re with the increasing metal weight loading, and results from rate measurements suggest that oxophilic Re can be used to promote the Pt-catalyzed hydrogenation of carbonyl groups in multifunctional molecules.
- Subjects :
- 010405 organic chemistry
Organic Chemistry
Noyori asymmetric hydrogenation
chemistry.chemical_element
Alcohol
Rhenium
010402 general chemistry
01 natural sciences
Medicinal chemistry
Catalysis
0104 chemical sciences
Inorganic Chemistry
chemistry.chemical_compound
chemistry
Methyl vinyl ketone
Organic chemistry
Physical and Theoretical Chemistry
Crotonaldehyde
Platinum
Selectivity
Subjects
Details
- ISSN :
- 18673899 and 18673880
- Volume :
- 8
- Database :
- OpenAIRE
- Journal :
- ChemCatChem
- Accession number :
- edsair.doi...........e9bc9ca2cbb9ef8c4963b5925a8ac333