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Synthesis of Catalytically Active Porous Platinum Nanoparticles by Transmetallation Reaction and Proposition of the Mechanism
Author(s) -
Pasricha Renu,
Bala Tanushree,
Biradar Ankush V.,
Umbarkar Shubhangi,
Sastry Murali
Publication year - 2009
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.200801863
Subject(s) - chloroplatinic acid , nanoparticle , platinum , transmetalation , materials science , catalysis , platinum nanoparticles , high resolution transmission electron microscopy , chemical engineering , monolayer , nanotechnology , nanomaterials , reaction mechanism , chemistry , organic chemistry , transmission electron microscopy , engineering
A facile method for the synthesis of porous platinum nanoparticles by transmetallation reactions between sacrificial nickel nanoparticles and chloroplatinic acid (H 2 PtCl 6 ) in solution, as well as at the constrained environment of the air–water interface, using a Langmuir–Blodgett instrumental setup is presented. To carry out the transmetallation at the air–water interface hydrophobized nickel nanoparticles are assembled as a monolayer on the sub phase containing platinum ions. The porous Pt nanoparticles obtained as a result of the reaction are found to act as extremely good catalysts for hydrogenation reaction. The products are well characterized by TEM, HRTEM, EDAX, and STEM. Attempts are made to postulate the plausible mechanism of this reaction to generate this kind of nanoparticle with controllable geometric shape and structure. This simple strategy has the potential to synthesize other nanomaterials of interest too.