Stability and phase transfer of catalytically active platinum nanoparticle suspensions

Indira Sriram, Alexandra E. Curtin, Ann N. Chiaramonti, J. Hunter Cuchiaro, Andrew R. Weidner, Tegan M. Tingley, Lauren F. Greenlee, Kavita M. Jeerage

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


In this work, we present a robust synthesis protocol for platinum nanoparticles that yields a monomodal dispersion of particles that are approximately 100 nm in diameter. We determine that these particles are actually agglomerates of much smaller particles, creating a “raspberry” morphology. We demonstrate that these agglomerates are stable at room temperature for at least 8 weeks by dynamic light scattering. Furthermore, we demonstrate consistent electrocatalytic activity for methanol oxidation. Finally, we quantitatively explore the relationship between dispersion solvent and particle agglomeration; specifically, particles are found to agglomerate abruptly as solvent polarity decreases.

Original languageEnglish (US)
Article number230
JournalJournal of Nanoparticle Research
Issue number5
StatePublished - May 26 2015

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Atomic and Molecular Physics, and Optics
  • General Chemistry
  • Modeling and Simulation
  • General Materials Science
  • Condensed Matter Physics


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