Nanotubes outshine costly platinum as fuel-cell catalyst

By Stephen Battersby FUEL cells could become smaller, more efficient and cheaper, if carbon nanotubes replaced the expensive platinum catalysts the cells currently rely on. Fuel cells have been hailed as a saviour of the environment, because they can turn hydrogen and other fuels into electricity cleanly and efficiently. But the technology has been hindered by the high cost of the platinum catalysts they require. Hydrogen fuels cells, for example, work by pumping hydrogen gas past one electrode (the anode), where it is split into its constituent electrons and protons. The electrons then flow through the anode,
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