Highly Catalytic Single-Crystal Dendritic Pt Nanostructures Supported on Carbon Nanotubes

Abstract

Herein we describe a one-step method for the preparation of single-crystal, dendritic Pt nanoparticles with no need of organic solvents, templates, or seeded growth. It is shown that Pt nanoparticles with two different shapesspherical or dendriticcan be efficiently supported onto the sidewalls of carbon nanotubes. Notably, the supported dendritic Pt nanostructrures yield unprecedented catalytic activity, evidenced through the lowest activation energy within an electron-transfer reaction as compared with those reported in the literature for Pt nanostructures.

Graphene nanosheets decorated with Pd, Pt, Au, and Ag nanoparticles: Synthesis, characterization, and catalysis applications

“…The k obs s of these reactions for G-Pd, G-Pt, G-Au and G-Ag are calculated to be 9.5 × 10 3 , 2.1 × 10 2 , 1.2 × 10 2 , and 2.6 × 10 2 s 1 , respectively. The data are comparable to the previously reported values for Pt NPs supported on CNTs (~10 2 -10 1 s 1 ) [50] and Au NPs supported on SiO 2 or TiO 2 hollow capsules (~10 3 -10 2 s 1 ) [49] for the same chemical reaction. It can be seen that the noble metal NPs still possess high catalytic activities after being anchored on graphene.…”

Rapid reduction of GO by hydrogen spill-over mechanism by in situ generated nanoparticles at room temperature and their catalytic performance towards 4-nitrophenol reduction and ethanol oxidation

“…These values are much higher than the earlier reported values for Pt and Pd nanoparticles decorated on carbon nanotubes. Overall, Pd@rGO exhibits better catalytic performances as compared to other catalysts [52,53].…”

Reversible Attachment of Platinum Alloy Nanoparticles to Nonfunctionalized Carbon Nanotubes

“…Recent reports include platinum [6,8,9] [19,20] and catalytic properties [21][22][23]. Beyond that, 1D alignment of NPs enables to modify the saturation magnetization and coercitivity through magnetostatic coupling [24][25][26].…”

“…Recent reports include platinum [6,8,9], cobalt [10,11], nickel [7,12], gold [13], rhodium [14] as well as platinum nickel [15], platinum tin [16] and platinum ruthenium [17] NPs immobilized on CNTs [18]. Alloying NPs of platinum with nickel, cobalt, or iron allows tunable magnetic response [19,20] and catalytic properties [21][22][23].…”