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Magnéli TiO 2 as a High Durability Support for the Proton Exchange Membrane (PEM) Fuel Cell Catalysts

Author

Listed:
  • Jivan Thakare

    (Energy and Environmental Research Center, University of North Dakota, Grand Forks, ND 58202, USA)

  • Jahangir Masud

    (Energy and Environmental Research Center, University of North Dakota, Grand Forks, ND 58202, USA)

Abstract

Proton exchange membrane fuel cells (PEMFCs) cathode catalysts’ robustness is one of the primary factors determining its long-term performance and durability. This work presented a new class of corrosion-resistant catalyst, Magnél TiO 2 supported Pt (Pt/Ti 9 O 17 ) composite, synthesized. The durability of a Pt/Ti 9 O 17 cathode under the PEMFC operating protocol was evaluated and compared with the state-of-the-art Pt/C catalyst. Like Pt/C, Pt/Ti 9 O 17 exhibited exclusively 4e − oxygen reduction reaction (ORR) in the acidic solution. The accelerated stress tests (AST) were performed using Pt/Ti 9 O 17 and Pt/C catalysts in an O 2 -saturated 0.5 M H 2 SO 4 solution using the potential-steps cycling experiments from 0.95 V to 0.6 V for 12,000 cycles. The results indicated that the electrochemical surface area (ECSA) of the Pt/Ti 9 O 17 is significantly more stable than that of the state-of-the-art Pt/C, and the ECSA loss after 12,000 potential cycles is only 10 ± 2% for Pt/Ti 9 O 17 composite versus 50 ± 5% for Pt/C. Furthermore, the current density and onset potential at the ORR polarization curve at Pt/C were significantly affected by the AST test. In contrast, the same remained almost constant at the modified electrode, Pt/Ti 9 O 17 . This demonstrated the excellent stability of Pt nanoparticles supported on Ti 9 O 17 .

Suggested Citation

  • Jivan Thakare & Jahangir Masud, 2022. "Magnéli TiO 2 as a High Durability Support for the Proton Exchange Membrane (PEM) Fuel Cell Catalysts," Energies, MDPI, vol. 15(12), pages 1-10, June.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:12:p:4437-:d:841822
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    References listed on IDEAS

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    1. Scheepers, Fabian & Stähler, Markus & Stähler, Andrea & Rauls, Edward & Müller, Martin & Carmo, Marcelo & Lehnert, Werner, 2021. "Temperature optimization for improving polymer electrolyte membrane-water electrolysis system efficiency," Applied Energy, Elsevier, vol. 283(C).
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