Synthesis of platinum nanoparticles intercalated between layers of commercially available graphite powder samples possessing surface area values ranging from 20 to 750â€¯m2â€¯g-1 was attempted by the insertion of platinum chloride between the layers followed by hydrogen reduction. Platinum nanosheets with 1-4â€¯nm thickness and 5-300â€¯nm width and hexagonal holes were obtained for the graphite powder with 20 m2â€¯g-1 independent of the platinum loadings (5, 10, and 15â€¯wt%). Platinum nanosheets with the similar size (1-4â€¯nm thickness and 5-300â€¯nm width) and hexagonal holes were formed for graphite powder with 120 and 300 m2â€¯g-1 with only 15â€¯wt% platinum loading, but not for 5 and 10â€¯wt% platinum loadings. Interestingly, for the graphite powder with higher surface area of 500 and 750 m2â€¯g-1, platinum nanosheets were not formed. Platinum nanosheets intercalated between graphite samples were evaluated for cinnamaldehyde hydrogenation in supercritical carbon dioxide solvent. High cinnamyl alcohol selectivity was obtained for the platinum nanosheets intercalated between graphite layers having surface area of 20â€¯m2â€¯g-1; however, hydrocinnamaldehyde selectivity was high for the platinum nanosheets intercalated between graphite samples having surface area of 120â€¯m2â€¯g-1.
Industrial: Chemistry Open Access