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Chemical Structure of Nitrogen-Doped Graphene with Single Platinum Atoms and Atomic Clusters as a Platform for the PEMFC Electrode
journal contribution
posted on 2014-02-27, 00:00 authored by Samantha Stambula, Nicolas Gauquelin, Matthieu Bugnet, Sandeep Gorantla, Stuart Turner, Shuhui Sun, Jian Liu, Gaixia Zhang, Xueliang Sun, Gianluigi A. BottonA platform
for producing stabilized Pt atoms and clusters through
the combination of an N-doped graphene support and atomic layer deposition
(ALD) for the Pt catalysts was investigated using transmission electron
microscopy (TEM) and scanning transmission electron microscopy (STEM).
It was determined, using imaging and spectroscopy techniques, that
a wide range of N-dopant types entered the graphene lattice through
covalent bonds without largely damaging its structure. Additionally
and most notably, Pt atoms and atomic clusters formed in the absence
of nanoparticles. This work provides a new strategy for experimentally
producing stable atomic and subnanometer cluster catalysts, which
can greatly assist the proton exchange membrane fuel cell (PEMFC)
development by producing the ultimate surface area to volume ratio
catalyst.