Mesoporous metallic rhodium nanoparticles

Bo Jiang, Cuiling Li, Ömer Dag, Hideki Abe, Toshiaki Takei, Tsubasa Imai, Md. Shahriar A. Hossain, Md. Tofazzal Islam, Kathleen Wood, Joel Henzie and Yusuke Yamauchi ()
Additional contact information
Bo Jiang: International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS)
Cuiling Li: International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS)
Ömer Dag: Bilkent University
Hideki Abe: International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS)
Toshiaki Takei: International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS)
Tsubasa Imai: International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS)
Md. Shahriar A. Hossain: International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS)
Md. Tofazzal Islam: Bangabandhu Sheikh Mujibur Rahman Agricultural University
Kathleen Wood: Australian Nuclear Science and Technology Organisation (ANSTO)
Joel Henzie: International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS)
Yusuke Yamauchi: International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS)

Nature Communications, 2017, vol. 8, issue 1, 1-8

Abstract: Abstract Mesoporous noble metals are an emerging class of cutting-edge nanostructured catalysts due to their abundant exposed active sites and highly accessible surfaces. Although various noble metal (e.g. Pt, Pd and Au) structures have been synthesized by hard- and soft-templating methods, mesoporous rhodium (Rh) nanoparticles have never been generated via chemical reduction, in part due to the relatively high surface energy of rhodium (Rh) metal. Here we describe a simple, scalable route to generate mesoporous Rh by chemical reduction on polymeric micelle templates [poly(ethylene oxide)-b-poly(methyl methacrylate) (PEO-b-PMMA)]. The mesoporous Rh nanoparticles exhibited a ∼2.6 times enhancement for the electrocatalytic oxidation of methanol compared to commercially available Rh catalyst. Surprisingly, the high surface area mesoporous structure of the Rh catalyst was thermally stable up to 400 °C. The combination of high surface area and thermal stability also enables superior catalytic activity for the remediation of nitric oxide (NO) in lean-burn exhaust containing high concentrations of O2.

Date: 2017
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DOI: 10.1038/ncomms15581

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