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Stability and phase transfer of catalytically active platinum nanoparticle suspensions



Indira Sriram, Alexandra Curtin, Ann C. Chiaramonti Debay, Lauren F. Greenlee, Kavita M. Jeerage


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.
Journal of Nanoparticle Research


catalysis, nanoparticles, synthesis, stability


Sriram, I. , Curtin, A. , Chiaramonti, A. , Greenlee, L. and Jeerage, K. (2015), Stability and phase transfer of catalytically active platinum nanoparticle suspensions, Journal of Nanoparticle Research, [online], (Accessed June 17, 2024)


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Created May 9, 2015, Updated November 10, 2018