Research team at Cornell University July 26 announced that it has developed a new stability and resistance to platinum CO / anode of titanium oxide tungsten (Pt/Ti0.7W0.3O2) electro-catalyst can be applied to PEM fuel cells. The results were published in the Journal of the American Chemical Society.
In front of the fuel cell cars and phones used in the challenges of electronic commerce is to develop low cost, sustainable and effective catalyst for hydrogen oxidation. Platinum is currently used as a catalyst but it is vulnerable to low levels of CO (10ppm) poisoning, which lead to significantly reduced performance. Other studies show that platinum oxide, in particular, tungsten, showing a high tolerance to CO. However, the disadvantage of tungsten is low electronic conductivity.
To resolve this problem, Hector Abruña Cornell team led by Dr pass titanium dioxide (TiO2), titanium dioxide is used in fuel battery as a catalyst. electronic conductivity of titanium dioxide is much less than the conventional carbon support. But the team that can enable them to improve the cation substitution.
Cornell team synthesized platinum nanoparticles on the conductivity of the burden of Ti0.7W0.3O2 above.
The first test showed that Pt/Ti0.7W0.3O2 Pt / C and PtRu / C catalyst is more stable. After 500 cycle time, the catalyst for a new integrated Coulomb loss was only 0.5% while commercial E-TEK PtRu / C catalyst is higher than 30%. And Pt / C and PtRu / C catalysts, new materials also show, there is always high H2 oxidation activity and higher CO tolerance, the work of the U.S. Department of Energy and the Centre on energy support.
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