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Nitrogen Doped Ordered Mesoporous Carbon as Support of PtRu Nanoparticles for Methanol Electro-Oxidation

Author

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  • David Sebastián

    (Instituto de Carboquímica (CSIC), Miguel Luesma Castán 4, 50018 Zaragoza, Spain)

  • María Jesús Nieto-Monge

    (Instituto de Carboquímica (CSIC), Miguel Luesma Castán 4, 50018 Zaragoza, Spain)

  • Sara Pérez-Rodríguez

    (Instituto de Carboquímica (CSIC), Miguel Luesma Castán 4, 50018 Zaragoza, Spain)

  • Elena Pastor

    (Dpto. Química-Física, Universidad de La Laguna, Avda. Astrofísico Francisco Sánchez s/n, 38071 La Laguna, Spain)

  • María Jesús Lázaro

    (Instituto de Carboquímica (CSIC), Miguel Luesma Castán 4, 50018 Zaragoza, Spain)

Abstract

The low oxidation kinetics of alcohols and the need for expensive platinum group metals are still some of the main drawbacks for the commercialization of energy efficient direct alcohol fuel cells. In this work, we investigate the influence of nitrogen doping of ordered mesoporous carbon (CMK) as support on the electrochemical activity of PtRu nanoparticles. Nitrogen doping procedures involve the utilization of pyrrole as both nitrogen and carbon precursor by means of a templating method using mesoporous silica. This method allows obtaining carbon supports with up to 14 wt. % nitrogen, with an effective introduction of pyridinic, pyrrolic and quaternary nitrogen. PtRu nanoparticles were deposited by sodium formate reduction method. The presence of nitrogen mainly influences the Pt:Ru atomic ratio at the near surface, passing from 50:50 on the bare (un-doped) CMK to 70:30 for the N-doped CMK catalyst. The electroactivity towards the methanol oxidation reaction (MOR) was evaluated in acid and alkaline electrolytes. The presence of nitrogen in the support favors a faster oxidation of methanol due to the enrichment of Pt at the near surface together with an increase of the intrinsic activity of PtRu nanoparticles.

Suggested Citation

  • David Sebastián & María Jesús Nieto-Monge & Sara Pérez-Rodríguez & Elena Pastor & María Jesús Lázaro, 2018. "Nitrogen Doped Ordered Mesoporous Carbon as Support of PtRu Nanoparticles for Methanol Electro-Oxidation," Energies, MDPI, vol. 11(4), pages 1-16, April.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:4:p:831-:d:139454
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    References listed on IDEAS

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    1. Lo Vecchio, Carmelo & Aricò, Antonino Salvatore & Monforte, Giuseppe & Baglio, Vincenzo, 2018. "EDTA-derived CoNC and FeNC electro-catalysts for the oxygen reduction reaction in acid environment," Renewable Energy, Elsevier, vol. 120(C), pages 342-349.
    2. Mauro Francesco Sgroi & Furio Zedde & Orazio Barbera & Alessandro Stassi & David Sebastián & Francesco Lufrano & Vincenzo Baglio & Antonino Salvatore Aricò & Jacob Linder Bonde & Michael Schuster, 2016. "Cost Analysis of Direct Methanol Fuel Cell Stacks for Mass Production," Energies, MDPI, vol. 9(12), pages 1-19, November.
    3. Juan Carlos Calderón & Laura Calvillo & María Jesús Lázaro & José Luis Rodríguez & Elena Pastor, 2017. "Effect of the Dendrimer Generation Used in the Synthesis of Pt-Ru Nanoparticles Supported on Carbon Nanofibers on the Catalytic Activity towards Methanol Oxidation," Energies, MDPI, vol. 10(2), pages 1-19, January.
    4. Luque-Centeno, J.M. & Martínez-Huerta, M.V. & Sebastián, D. & Lemes, G. & Pastor, E. & Lázaro, M.J., 2018. "Bifunctional N-doped graphene Ti and Co nanocomposites for the oxygen reduction and evolution reactions," Renewable Energy, Elsevier, vol. 125(C), pages 182-192.
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