Updates: Whatever Happened to Fuel Cell Progress?

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Revving Up Fuel Cells Progress toward hydrogen-powered cars depends on less expensive but greater capacity fuel-cell systems [see “ On the Road to Fuel-Cell Cars ”; SciAm, March 2005]. Researchers have taken big steps on both the cost and storage challenges. A team from Quebec came up with a recipe that uses iron instead of expensive platinum to catalyze the electricity-making reaction of hydrogen and oxygen. The key was carbon structures containing microscopic pores, which were filled with iron to provide plenty of active sites for chemical reactions. The iron-based substance, described in the April 3 Science , produced catalytic activity within 10 percent of the best platinum versions and 35 times better than previous, nonprecious metal catalysts.

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