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A hybrid Pt/NbO/CNTs catalyst with high activity and durability for oxygen reduction reaction in PEMFC

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  • Alipour MoghadamEsfahani, Reza
  • Vankova, Svetoslava K.
  • Easton, E. Bradley
  • Ebralidze, Iraklii I.
  • Specchia, Stefania

Abstract

To improve the kinetics and durability of Pt-based electrodes toward the oxygen reduction reaction (ORR), high electroactive and stable catalysts were synthesized by depositing Pt over niobium oxide (NbO) supported on commercial multi-wall carbon nanotubes (CNTs). The Pt/NbO/CNTs, exhibits excellent electroactivity and stability toward ORR, reaching a high electroactivity of 57 mA mgPt−1, higher than the Pt/CNTs and commercial Pt/C (20% Pt/C HiSPEC™). Moreover, the developed Pt/NbO/CNTs demonstrated outstanding durability under accelerated stress testing (AST) according to load cycling and startup/shutdown stability protocols. Proton exchange membrane fuel cells (PEMFC) tests with an MEA fabricated using Pt/NbO/CNTs showed excellent performance, with a low Pt loading down to 0.15 mg cm−2, achieving a maximum power density of 772 mW cm−2. Furthermore, a short-term durability test in PEMFC demonstrated only a 4% loss on the maximum power density at 80 °C. The superior electrocatalytic activity and durability of Pt/NbO/CNTs can be ascribed to the anchoring effect of Pt nanoparticles over the NbO/CNTs hybrid support, showing that the developed Pt/NbO/CNTs is a promising durable electrocatalyst for PEMFC applications.

Suggested Citation

  • Alipour MoghadamEsfahani, Reza & Vankova, Svetoslava K. & Easton, E. Bradley & Ebralidze, Iraklii I. & Specchia, Stefania, 2020. "A hybrid Pt/NbO/CNTs catalyst with high activity and durability for oxygen reduction reaction in PEMFC," Renewable Energy, Elsevier, vol. 154(C), pages 913-924.
    • Handle: RePEc:eee:renene:v:154:y:2020:i:c:p:913-924
    DOI: 10.1016/j.renene.2020.03.029
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    References listed on IDEAS

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    1. Alipour Moghadam Esfahani, Reza & Rivera Gavidia, Luis Miguel & García, Gonzalo & Pastor, Elena & Specchia, Stefania, 2018. "Highly active platinum supported on Mo-doped titanium nanotubes suboxide (Pt/TNTS-Mo) electrocatalyst for oxygen reduction reaction in PEMFC," Renewable Energy, Elsevier, vol. 120(C), pages 209-219.
    2. Polterovich, Victor & Popov, Vladimir, 2006. "Эволюционная Теория Экономической Политики: Часть I: Опыт Быстрого Развития [An Evolutionary Theory of Economic Policy: Part I: The Experience of Fast Development]," MPRA Paper 22168, University Library of Munich, Germany.
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    Cited by:

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