Highly Efficient Oxygen Electrode Obtained by Sequential Deposition of Transition Metal-Platinum Alloys on Graphene Nanoplatelets

Mladenović D., Daş E., Santos D. M. F., BAYRAKÇEKEN YURTCAN A., Šljukić B.

Materials, cilt.16, sa.9, 2023 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 16 Sayı: 9
  • Basım Tarihi: 2023
  • Doi Numarası: 10.3390/ma16093388
  • Dergi Adı: Materials
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, CAB Abstracts, Communication Abstracts, Compendex, INSPEC, Metadex, Veterinary Science Database, Directory of Open Access Journals, Civil Engineering Abstracts
  • Anahtar Kelimeler: alloy nanoparticles, graphene nanoplatelets, oxygen reduction reaction, oxygen evolution reaction, bifunctional electrocatalyst, REDUCTION REACTION, EVOLUTION REACTION, SURFACE-AREA, ELECTROCATALYSTS, CARBON, IRON, CATALYSTS, NANOPARTICLES, PTNI, FE
  • Atatürk Üniversitesi Adresli: Evet

Özet

A set of platinum (Pt) and earth-abundant transition metals (M = Ni, Fe, Cu) on graphene nanoplatelets (sqPtM/GNPs) was synthesised via sequential deposition to establish parallels between the synthesis method and the materials’ electrochemical properties. sqPtM/GNPs were assessed as bifunctional electrocatalysts for oxygen evolution (OER) and reduction (ORR) reactions for application in unitised regenerative fuel cells and metal-air batteries. sqPtFe/GNPs showed the highest catalytic performance with a low potential difference of ORR half-wave potential and overpotential at 10 mA cm−2 during OER, a crucial parameter for bifunctional electrocatalysts benchmarking. A novel two-stage synthesis strategy led to higher electrocatalytic performance by facilitating the reactants’ access to the active sites and reducing the charge-transfer resistance.