Synthesis of catalytically active porous platinum nanoparticles by transmetallation reaction and proposition of the mechanism

Renu Pasricha, Tanushree Bala, Ankush V. Biradar, Shubhangi Umbarkar, Murali Sastry

Research output: Contribution to journalArticleResearchpeer-review

31 Citations (Scopus)

Abstract

A facile method for the synthesis of porous platinum nanoparticles by transmetallation reactions between sacrificial nickel nanoparticles and chloroplatinic acid (H2PtCl6) 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 rategy has the potential to synthesize other nanomaterials of interest too.

Original languageEnglish
Pages (from-to)1467-1473
Number of pages7
JournalSmall
Volume5
Issue number12
DOIs
Publication statusPublished - 19 Jun 2009
Externally publishedYes

Keywords

  • Catalysts
  • Interfaces
  • Nickel nanoparticles
  • Porous platinum
  • Transmetallation

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