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Size Regulation and Stability Enhancement of Pt Nanoparticle Catalyst via Polypyrrole Functionalization of Carbon-Nanotube-Supported Pt Tetranuclear Complex

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Department of Chemistry, Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8602, Japan
Research Center for Materials Science (RCMS) & Integrated Research Consortium on Chemical Science (IRCCS), Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8602, Japan
§ Element Visualization Team, Materials Visualization Photon Science Group, RIKEN SPring-8 Center, 1-1-1 Koto, Sayo, Hyogo 679-5198, Japan
*E-mail: [email protected] (S.M.).
*E-mail: [email protected] (M.T.).
Cite this: Langmuir 2017, 33, 39, 10271–10282
Publication Date (Web):September 21, 2017
https://doi.org/10.1021/acs.langmuir.7b02114
Copyright © 2017 American Chemical Society

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    Abstract

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    A novel multiwall carbon nanotube (MWCNT) and polypyrrole (PPy) composite was found to be useful for preparing durable Pt nanoparticle catalysts of highly regulated sizes. A new pyrene-functionalized Pt4 complex was attached to the MWCNT surface which was functionalized with PPy matrix to yield Pt4 complex/PPy/MWCNT composites without decomposition of the Pt4 complex units. The attached Pt4 complexes in the composite were transformed into Pt0 nanoparticles with sizes of 1.0–1.3 nm at a Pt loading range of 2 to 4 wt %. The Pt nanoparticles in the composites were found to be active and durable catalysts for the N-alkylation of aniline with benzyl alcohol. In particular, the Pt nanoparticles with PPy matrix exhibited high catalyst durability in up to four repetitions of the catalyst recycling experiment compared with nonsize-regulated Pt nanoparticles prepared without PPy matrix. These results demonstrate that the PPy matrix act to regulate the size of Pt nanoparticles, and the PPy matrix also offers stability for repeated usage for Pt nanoparticle catalysis.

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    The Supporting Information is available free of charge on the ACS Publications website at DOI: 10.1021/acs.langmuir.7b02114.

    • Synthesis and characterization data of 1 (NMR, ESI-TOF-MS, FT-IR, UV–vis, fluorescence, DFT calculation, and CV); the calibration curve obtained by XRF and Pt LIII-edge XANES analyses; BET; Pt LIII-edge EXAFS curve-fitting results; TGA; SEM, Raman, XPS, and TEM data for Pt4/CNT, Pt4/CNT/PPy, nanoPt/CNT/PPy, and nanoPt/CNT; and the catalytic reaction results (PDF)

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    This article is cited by 10 publications.

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    8. Zaoxue Yan, Jiajia Cui, Zongyao Zhang, Zhifeng Jiang, Wei Wei, Guisheng Zhu. Electrochemically Corroded Thick Microporous N-C Layer Encapsulated Pt/C as Highly Active and Ultra-Highly Stable Electrocatalyst for Methanol Oxidation and Oxygen Reduction Reaction in Acidic Media. SSRN Electronic Journal 2022, 20 https://doi.org/10.2139/ssrn.4153153
    9. Ning Yan, Fan Liu, Xu Meng, Meng Qin, Guangqi Zhu, Luxia Bu, Zigeng Liu, Wei Wang. Morphology and Structure Controls of Single-Atom Fe–N–C Catalysts Synthesized Using FePc Powders as the Precursor. Processes 2021, 9 (1) , 109. https://doi.org/10.3390/pr9010109
    10. Kentaro Ichihashi, Satoshi Muratsugu, Shota Miyamoto, Kana Sakamoto, Nozomu Ishiguro, Mizuki Tada. Enhanced oxygen reduction reaction performance of size-controlled Pt nanoparticles on polypyrrole-functionalized carbon nanotubes. Dalton Transactions 2019, 48 (21) , 7130-7137. https://doi.org/10.1039/C9DT00158A

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