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The formation of Pt clusters deposited by strong electrostatic adsorption (SEA) has been studied on highly oriented pyrolytic graphite (HOPG) as well as on higher surface area graphene nanoplatelets (GNPs), which have well-defined surface structures. Both surfaces can be hydroxylated by treatment with hydrochloric acid, and in the case of HOPG, the surface functional groups are exclusively hydroxyls...
The ability of a benchtop powder X-ray diffractometer with a solid state detector to observe the ambient oxidation of ultrasmall (sub 2.5 nm) Pt particles, previously seen only with synchrotron XRD, is demonstrated. The oxidation is corroborated with STEM imaging and fast Fourier transform analysis. Graphical Abstract
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