Alternative Support Material to Platinum Catalyst Used for Oxygen Reduction Reaction: Nonporous Carbon

Öztürk A., Bayrakçeken Yurtcan A.

GAZI UNIVERSITY JOURNAL OF SCIENCE, cilt.36, sa.4, ss.1463-1478, 2023 (ESCI)

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 36 Sayı: 4
  • Basım Tarihi: 2023
  • Doi Numarası: 10.35378/gujs.1054803
  • Dergi Adı: GAZI UNIVERSITY JOURNAL OF SCIENCE
  • Derginin Tarandığı İndeksler: Emerging Sources Citation Index (ESCI), Scopus, Academic Search Premier, Aerospace Database, Aquatic Science & Fisheries Abstracts (ASFA), Communication Abstracts, Metadex, Civil Engineering Abstracts, TR DİZİN (ULAKBİM)
  • Sayfa Sayıları: ss.1463-1478
  • Atatürk Üniversitesi Adresli: Evet

Özet

In this study, unlike porous carbon as a conventional catalyst support material in fuel cells, nonporous carbon was synthesized in the presence of different HCl concentrations (0.2 M-1 M) and investigated as a support material for platinum (Pt) catalysts in the oxygen reduction reaction (ORR). Since the micropore volume of the synthesized carbons is negligible, the detected surface areas with Brunauer-Emmett-Teller (BET) method were between the range of 19-23 m2/g. Among the support materials, the carbon-supported Pt catalyst synthesized in the presence of 1 M HCl was investigated electrochemically in terms of hydrogen oxidation (HOR) and ORR half-cell reactions in the three-electrode system. The Pt catalyst supported with nonporous carbon, synthesized using 1 M HCl, reached the maximum limiting current value of -1.2 mA/cm2 (@1600 rpm, 5 mV/s) at ORR hydrodynamic curves. Low internal and charge transfer resistances of the same catalyst in electrochemical impedance spectroscopy (EIS) analysis are attributable to its nonporous structure.