Tailoring metal-oxide-supported PtNi as bifunctional catalysts of superior activity and stability for unitised regenerative fuel cell applications

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Mladenović D., Santos D. M., Bozkurt G., Soylu G. S., Yurtcan A., Miljanić Š., ...Daha Fazla

Electrochemistry Communications, cilt.124, 2021 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 124
  • Basım Tarihi: 2021
  • Doi Numarası: 10.1016/j.elecom.2021.106963
  • Dergi Adı: Electrochemistry Communications
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, PASCAL, Chemical Abstracts Core, Chimica, Compendex, INSPEC, Directory of Open Access Journals
  • Anahtar Kelimeler: Unitised regenerative fuel cell, Oxygen reduction reaction, Oxygen evolution reaction, Binary metal oxides, Platinum, Nickel
  • Atatürk Üniversitesi Adresli: Evet

Özet

© 2021 The Author(s)Three different metal oxides based on Mn2O3 with TiO2 or NiO were synthesised. Pt or PtNi nanoparticles were anchored on each support, creating a set of nine samples that were tested for the oxygen reduction reaction (ORR) and the oxygen evolution reaction (OER). PtNi/Mn2O3-NiO showed the most promising results for ORR as evidenced by the lowest Tafel slope, the highest diffusion-limited current density and number of electrons exchanged, along with the highest stability. The best performance of PtNi/Mn2O3-NiO reflects its highest electrochemical surface area and the lowest charge-transfer resistance. Furthermore, this catalyst showed high activity for the OER as evidenced by the low Tafel slope and high current density at an overpotential of 400 mV. The present study indicated different active sites for the two reactions, i.e., PtNi NPs for the ORR and NiO for the OER.