Pt Nanoparticle-Dispersed
Graphene-Wrapped MWNT Composites As Oxygen Reduction Reaction
Electrocatalyst in Proton Exchange Membrane Fuel Cell
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Abstract
Chemical and electrical synergies between graphite oxide
and multiwalled
carbon nanotube (MWNT) for processing graphene wrapped-MWNT hybrids
has been realized by chemical vapor deposition without any chemical
functionalization. Potential of the hybrid composites have been demonstrated
by employing them as electrocatalyst supports in proton exchange membrane
fuel cells. The defects present in the polyelectrolyte, which have
been wrapped over highly dispersed MWNT, act as anchoring sites for
the homogeneous deposition of platinum nanoparticles. Single-cell
proton exchange membrane fuel cells show that the power density of
the hybrid composite-based fuel cells is higher compared to the pure
catalyst-support-based fuel cells, because of enhanced electrochemical
reactivity and good surface area of the nanocomposites