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.
, Curtin, A.
, Chiaramonti, A.
, Greenlee, L.
and Jeerage, K.
Stability and phase transfer of catalytically active platinum nanoparticle suspensions, Journal of Nanoparticle Research, [online], https://doi.org/10.1007/s11051-015-3034-1
(Accessed December 4, 2023)