Investigation of the effects of supporting material modification on the nucleation behavior of Pt catalysts


Özdemir J. H., Erol M., Öztürk K., Özdemir O. K.

International Journal of Hydrogen Energy, cilt.48, sa.60, ss.22967-22977, 2023 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 48 Sayı: 60
  • Basım Tarihi: 2023
  • Doi Numarası: 10.1016/j.ijhydene.2023.01.143
  • Dergi Adı: International Journal of Hydrogen Energy
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, PASCAL, Artic & Antarctic Regions, Chemical Abstracts Core, Chimica, Communication Abstracts, Compendex, Environment Index, INSPEC
  • Sayfa Sayıları: ss.22967-22977
  • Anahtar Kelimeler: Anchoring effect, Modified-carbon supports, Platinum catalysts, Polymer exchange membrane fuel cells
  • Yıldız Teknik Üniversitesi Adresli: Evet

Özet

The presence of stable support material allows catalysts to operate for longer periods under harsh conditions. Although carbon is widely preferred as a supporting material for platinum (Pt) catalysts, the oxidizing problem at high overpotentials causes the catalyst dissolution and reduces the surface area. However, different functional groups on the supporting material surface provide a more homogeneous and rapid reduction of metal cation. Therefore, the use of composites consisting of conductive polymers and carbon structures gains importance. In this study, carbon modification is performed by polyaniline- and 4-Fluoroaniline and synthesized samples are physically and electrochemically characterized. The actual catalytic performances of these catalysts are investigated in a single-cell fuel cell. Characterization studies showed Pt particles distributed more homogeneously on 4F-PANI-C and have smaller grain sizes. CV results support that Pt/4F-PANI-C has a relatively higher electrochemical active surface area. This situation remains valid after the ADT tests. Finally, the MEA performances show that both the power and current density of the Pt/4F-PANI-C catalyst are higher than the other samples.