Mesoporous Platinum Films from Lyotropic Liquid Crystalline Phases

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Science  31 Oct 1997:
Vol. 278, Issue 5339, pp. 838-840
DOI: 10.1126/science.278.5339.838

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The lyotropic liquid crystalline phases of surfactants exhibit a rich polymorphism of structures that have long-range periodicities and whose characteristic repeat distances range from 2 to 15 nanometers. The electrochemical reduction of platinum salts confined to the aqueous environments of these phases leads to the deposition of platinum films that have a well-defined long-ranged porous nanostructure and high specific surface areas. These results suggest that the use of liquid crystalline plating solutions could be a versatile way to create mesoporous electrodes for batteries, fuel cells, electrochemical capacitors, and sensors.

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