Chemically synthesized reduced graphene oxide-carbon black based hybrid catalysts for PEM fuel cells

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Bayrakçeken Yurtcan A., Daş E.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, cilt.43, sa.40, ss.18691-18701, 2018 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 43 Sayı: 40
  • Basım Tarihi: 2018
  • Doi Numarası: 10.1016/j.ijhydene.2018.06.186
  • Dergi Adı: INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.18691-18701
  • Anahtar Kelimeler: PEM fuel cell, Reduced graphene oxide, Carbon black, Hybrid support material, Supercritical carbon dioxide deposition, NITROGEN SORPTION MEASUREMENTS, POROUS SOLIDS, ELECTROCHEMICAL PROPERTIES, OXYGEN REDUCTION, POLYMER, NANOPARTICLES, PERFORMANCE, DEPOSITION, ELECTROCATALYSTS, CONNECTIVITY
  • Atatürk Üniversitesi Adresli: Evet

Özet

In this study, hybrid (synthesized rGO and commercial carbon black (CB) in various weight ratios) supported Pt catalysts were synthesized by using the supercritical carbon dioxide deposition (scCO(2)) technique for PEM fuel cells. In hybrid materials, rGO to CB weight ratios were changed in between 90:10 to 50:50 which were compared to their plain materials. The physicochemical and the electrochemical characteristics of the materials were examined by using BET, XRD, TGA, TEM, contact angle and roughness measurements, CV and PEM fuel cell performance tests. All these characterizations showed that the hybrid supported Pt catalysts were successfully synthesized. TEM images of the catalysts confirmed the highly dispersed and small nanoparticle formation (1.9-2.9 nm) via scCO(2) deposition technique. Among the hybrid supported catalysts, catalyst having rGO:CB ratio of 70:30 showed the best PEM fuel cell performance. Electrochemical characterization either fuel cell performance test or CV results indicated significantly enhancement in activity with an increase in CB amount in the support. (C) 2018 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.