la6b02578_si_liveslides.zip (7.2 MB)
Electrocatalytic Reduction of Oxygen on Platinum Nanoparticles in the Presence and Absence of Interactions with the Electrode Surface
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posted on 2016-09-30, 17:54 authored by Nevena Ostojic, Richard M. CrooksWe
report that ultraviolet/ozone (UV/O3) treatment can
be used to remove sixth-generation, hydroxyl-terminated poly(amidoamine)
(PAMAM) dendrimers from dendrimer-encapsulated Pt nanoparticles (Pt
DENs) previously immobilized onto a pyrolyzed photoresist film (PPF)
electrode. Results from X-ray photoelectron spectroscopy, scanning
transmission electron microscopy, and electrochemical experiments
indicate that removal of the dendrimer proceeds without changes to
the size, shape, or electrocatalytic properties of the encapsulated
nanoparticles. The UV/O3 treatment did not damage the PPF
electrode. The electrocatalytic properties of the DENs before and
after removal of the dendrimer were nearly identical.