US scientists are looking into a method of using atoms of gold to make platinum catalysts more efficient and prolong their lifespan. In experiments conducted by the US department of energy's (DOE) Brookhaven National Laboratory, evidence has been uncovered that the addition of gold clusters to platinum electrocatalysts has arrested the dissolving of platinum that arises from stop-and-go driving of fuel cell-powered cars. Currently, tests have taken place in simulated conditions, but should the findings be substantiated when tests are commenced in engines this month it could drastically cut levels of platinum deterioration, which can be as pronounced as a 45 per cent reduction during accelerated tests. Research team member Radoslav Adzic said: "Platinum is by far the best single component catalyst for the oxygen reduction reaction, and we have to find a way to protect it. "The very promising properties of fuel cells have been known for many decades. But it's only now that we can look at the activities and qualities of the catalysts and find something stable enough to be used in cars or residential applications," he added.

Sources:

http://www.eurekalert.org/pub_releases/2007-03/dnl-gpc032707.php

http://www.merid.org/NDN/more.php?id=945

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