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Hierarchical SnO2 Nanostructure with High Energy {113} Facet as Pt-Support for Improved Oxygen Reduction Reaction

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Hierarchical SnO2 flower like nanostructures (SnO2 NFs) with {113} facet is synthesized by a simple hydrothermal method. Pt nanoparticles were deposited to the prepared SnO2 NFs to obtain SnO2 NF-supported Pt nanoparticles (Pt/SnO2 NFs) by chemical reduction of a Pt precursor with sodium borohydride at room temperature. The crystal structure of SnO2 NFs is confirmed by X-ray diffraction (pXRD). Morphology of SnO2 NFs before and after Pt deposition revealed by scanning electron microscopy (SEM) analysis, where it found that the Pt nanoparticles are uniformly dispersed over the support. Transmission electron microscopy (TEM) analysis also confirms the dispersion of Pt over SnO2 NFs. The oxygen reduction reaction (ORR) performance of the Pt/SnO2 NFs was compared with that of Pt nanoparticles supported by SnO2 nanoparticles (Pt/SnO2 NPs) or commercial carbon supported Pt (Pt/C). The Pt/SnO2 NFs showed higher ORR activity and long-term stability than the Pt/SnO2 NPs or Pt/C. The Pt/SnO2 NFs is a promising candidate for ORR in polymer-electrolyte membrane fuel cells (PEMFCs) in terms of the enhanced ORR activity and stability.
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Keywords: Electrocatalyst Support; Oxygen Reduction; SnO2 Nanoparticles; SnO2 Nanostructure

Document Type: Research Article

Affiliations: 1: National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan 2: Kanagawa University, 3-27 Rokkakubashi, Yokohama, Kanagawa 221-8686, Japan 3: WPI Center for Material Nanoarchitectonics (WPI-MANA), National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan

Publication date: 01 May 2017

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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