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Showing 1–8 of 8 results
Advanced filters: Author: Jonah Erlebacher Clear advanced filters

  • Conventional dealloying methods to produce bicontinuous open nanoporous structures for catalysis are limited to very few alloys and produce chemical waste. Here, the authors develop a green process, vapor-phase dealloying, to selectively remove high partial vapor pressure components and create nanoporosity in a wide range of alloys.

    • Zhen Lu
    • Cheng Li
    • Mingwei Chen
    ResearchOpen Access
    Nature Communications
    Volume: 9, P: 1-7

  • The improvement of catalysts for the oxygen-reduction reaction is an important challenge for fuel cells and other electrochemical-energy technologies. A composite nanoporous Ni–Pt alloy with a tailored geometric architecture is now shown to exhibit high mass activity for oxygen reduction.

    • J. Snyder
    • T. Fujita
    • J. Erlebacher
    Research
    Nature Materials
    Volume: 9, P: 904-907

  • Liquid metal dealloying produces topologically complex nanoporous structures, however little is known about how they form. Here, the authors use mesoscale phase-field modeling and experiments to show that structure formation is governed by both interfacial spinodal decomposition and diffusion-coupled growth.

    • Pierre-Antoine Geslin
    • Ian McCue
    • Alain Karma
    ResearchOpen Access
    Nature Communications
    Volume: 6, P: 1-8

  • Liquid metal dealloying is a method to fabricate bicontinuous composite structures with ultra-high interfacial area for diverse applications. This paper demonstrates how the topology of those structures can be controlled by the choice of melt composition.

    • Longhai Lai
    • Bernard Gaskey
    • Alain Karma
    ResearchOpen Access
    Nature Communications
    Volume: 13, P: 1-10

  • Although nanoparticulate gold possesses remarkable catalytic activity towards oxidation reactions, catalytic activity usually cannot be observed in particles larger than 5 nm. Atomic insights into dealloyed nanoporous gold catalysts by transmission electron microscopy now demonstrate that surface defects are active sites for the catalytic oxidation of carbon monoxide and that residual silver stabilizes atomic steps.

    • Takeshi Fujita
    • Pengfei Guan
    • Mingwei Chen
    Research
    Nature Materials
    Volume: 11, P: 775-780

  • Production of affordable, clean hydrogen relies on efficient oxygen evolution, but improving catalytic performance for the reaction in acidic media is challenging. Here the authors show how tuning the nanoporous morphology of iridium/iridium oxide leads to an improvement in activity/stability, compared with conventional iridium-based oxides.

    • Yong-Tae Kim
    • Pietro Papa Lopes
    • Nenad M. Markovic
    ResearchOpen Access
    Nature Communications
    Volume: 8, P: 1-8