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IBN develops superior fuel cell material
Date:8/24/2012

Singapore, August 24, 2012 Using a mixture of gold, copper and platinum nanoparticles, IBN researchers have developed a more powerful and longer lasting fuel cell material. This breakthrough was published recently in leading journal, Energy and Environmental Science.

Fuel cells are a promising technology for use as a source of electricity to power electronic devices, vehicles, military aircraft and equipment. A fuel cell converts the chemical energy from hydrogen (fuel) into electricity through a chemical reaction with oxygen. A fuel cell can produce electricity continuously as long as there is a fuel supply.

Current commercially available fuel cells use platinum nanoparticles as the catalyst to speed up the chemical reaction because platinum is the only metal that can resist the highly acidic conditions inside such a cell. However, the widespread use of fuel cells has been impeded by the high cost of platinum and its low stability.

To overcome this limitation, a team of researchers led by IBN Executive Director Professor Jackie Y. Ying has discovered that by replacing the central part of the catalyst with gold and copper alloy and leaving just the outer layer in platinum, the new hybrid material can provide 5 times higher activity and much greater stability than the commercial platinum catalyst. With further optimization, it would be possible to further increase the material's catalytic properties.

IBN's new nanocomposite material can produce at least 0.571 amperes of electric current per milligram of platinum, compared to 0.109 amperes per milligram of platinum for commercial platinum catalysts. This is also the first time that a catalyst has been shown to enhance both the stability and activity for the fuel cell reaction with a significantly reduced platinum content.

To make this catalyst more active than the commercial platinum catalyst, the researchers have designed the core of the nanocrsytalline m
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Contact: Elena Tan
elenatan@ibn.a-star.edu.sg
65-682-47032
Agency for Science, Technology and Research (A*STAR), Singapore
Source:Eurekalert  

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