A series of Pd and Pt nanoparticles (NPs) was prepared starting from the corresponding metal ions and lignosulphonates; NPs were tested as catalysts for allyl alcohols hydrogenation in water at room temperature and pressure. All NPs were active with sharp differences in conversions and selectivites: Pt NPs formed mainly saturated alcohols, whereas Pd NPS were more active, but less selective, forming, in addition to saturated alcohols, also isomeric unsaturated alcohols and aldehydes, both saturated and unsaturated..
Results and DiscussionWe prepared a series of twelve NPs using two metals (Pt and Pd) and six water-soluble lignins: Kraft lignin (KrLig), ammonium lignosulphonate (AmLig), calcium (CaLig) and sodium (NaLig) lignosulphonates and the corresponding lowsugar ones (CaROLig and NaROLig); lignins, in water solution and at 80 °C, acted as both reducing agents for the metal ions, i.e. H 2 PtCl 6 and PdCl 2 , and as stabilizing agents for the formed
Nanoparticles. -Six different platinum nanoparticles and six different palladium nanoparticles are prepared and screened as catalysts for the hydrogenation of allylic alcohols. It is found that the allylic alcohols are hydrogenated with sharp differences in conversions and selectivities. Platinum nanoparticles mainly lead to saturated alcohols, whereas palladium nanoparticles were more active, but less selective, forming in addition to saturated alcohols also isomeric unsaturated alcohols and aldehydes, both saturated and unsaturated. -(DI PIETRANTONIO, K.; COCCIA, F.; TONUCCI*, L.; D'ALESSANDRO, N.; BRESSAN, M.; RSC Adv. 5 (2015) 84, 68493-68499, http://dx.
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