Unlike blinged-out rap stars dripping with platinum chains, fuel cell designers try to scrimp on the precious metal. Researchers have now come up with a new way to make do with less platinum and get even better performance from fuel cells. The finding, which appears online May 14 in Science, may provide a much-needed price chop for clean, efficient fuel cell technology. Fuel cells generate energy through chemical reactions between hydrogen and oxygen, emitting only water as waste. But the high cost of the materials needed to make these reactions happen — in particular, platinum — has prevented fuel cell...