Ultralow Pt loading on CVD graphene for acid electrolytes and PEM fuel cells

Yazici M. S., Azder M. A., Salihoglu O., San F. G. B.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, cilt.43, sa.40, ss.18572-18577, 2018 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 43 Sayı: 40
  • Basım Tarihi: 2018
  • Doi Numarası: 10.1016/j.ijhydene.2018.06.020
  • Dergi Adı: INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.18572-18577
  • Anahtar Kelimeler: CVD graphene, Sputter Pt, Oxygen reduction, PEM fuel cell, OXYGEN REDUCTION REACTION, CATALYST LAYERS, ENERGY-STORAGE, MASS ACTIVITY, 3D GRAPHENE, THIN-FILM, ELECTRODES, DEPOSITION, ELECTROCATALYSTS, PERFORMANCE
  • İstanbul Teknik Üniversitesi Adresli: Hayır

Özet

Continuous-phase, porous graphene was produced by CVD process and tested for suitability as catalyst and catalyst support for polymer electrolyte membrane (PEM) fuel cells. N-doping of CVD graphene was carried by NH3 gas flown over graphene for a given time. Ultralow Pt was sputter deposited onto porous, continuous phase N-doped graphene. Oxygen reduction reaction (ORR) activity by Rotating Disc Electrode (RDE) in 0,1 M HClO4 electrolyte and PEM fuel cell performance were measured. N-doping and thicker Pt sputtering increases reduction current in RDE measurements. Sputter deposition of 1 nm and 10 nm Pt on CVD graphene (2.1 and 21.45 mu gPt/cm(2) loading) has shown orders of magnitude increase in current compare to only-graphene samples. In fuel cell testing, sputter deposited Pt layer of 10 nm has provided 2.5 A/mgPt at 0.5 V polarization while 1 nm samples shows 15 A/mgPt performance at the same voltage. (C) 2018 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.