
69Carbon Materials and Their Energy Conversion and Storage Applications
Apart from Pt nanoparticles, other metals with a variety of shapes/structures
loaded on carbon nanomaterials have been studied as the fuel cell catalyst in recent
years, including Pt clusters,
60
Pd nanoparticles,
61
Pt-Ru alloy nanoparticles,
62
and
Pt-Pd alloy nanoparticles.
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3.2 PHOTOELECTRICAL CELL
Harvesting energy from sunlight has been the dream of human beings for a long
time. In fact, we have already been enjoying heat and food, whose energy origi-
nates from the sun. Moreover, energy of hydropower and fossil fuel also comes from
the sun. Nevertheless, direct con