Macroscopically Strong Nanoporous Pt Prepared by Dealloying


  • H.J.J. greatly acknowledges the financial supports from the Alexander von Humboldt Foundation. This work was supported by the Landesstiftung Baden-Württemberg.


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Nanoporous composites with nanoporous Pt matrix (see figure, coarsened structure) and micron-scale dendritic Pt solid solution embeddings were fabricated by dealloying of Pt-Ag alloys. The combination of large surface area and nano-porosity with dramatically enhanced compression strength and dimensional stability (compared with the conventional monolithic nanoporous metals), allows this material for applications as sensors, actuators or catalysts.