Electrooxidation of hydrogen peroxide and sodium borohydride on Ni deposited carbon fiber electrode for alkaline fuel cells

AYTAÇ A., Gurbuz M., Sanli A. E.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, cilt.36, sa.16, ss.10013-10021, 2011 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 36 Sayı: 16
  • Basım Tarihi: 2011
  • Doi Numarası: 10.1016/j.ijhydene.2011.05.079
  • Dergi Adı: INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.10013-10021
  • Anahtar Kelimeler: Nickel, Hydrogen peroxide, Sodium borohydride, Alkaline fuel cells, GLASSY-CARBON, ELECTROCATALYTIC OXIDATION, NICKEL, METHANOL, PERFORMANCE, ANODE
  • Gazi Üniversitesi Adresli: Evet

Özet

In this study, Ni deposited carbon fiber electrode (Ni/CF) prepared by electroless deposition method was examined for their redox process and electrocatalytic activities during the oxidation of hydrogen peroxide and sodium borohydride in alkaline solutions. The Ni/CF catalyst was characterized by X-ray diffraction (XRD), energy dispersive X-ray analysis (EDAX), scanning electron microscopy (SEM) and electrochemical voltammetry analysis. The electrocatalytic activity of the Ni/CF for oxidation of hydrogen peroxide and sodium borohydride in alkaline solutions was investigated by cyclic voltammetry. The anodic peak current density is found to be three times higher on Ni/CF catalyst for sodium borohydride compared to that for hydrogen peroxide. Preliminary tests on a single cell of a direct borohydride/peroxide fuel cell (DBPFC) and direct peroxide/peroxide fuel cell (DPPFC) indicate that DBPFC with the power density of 5.9 mW cm(-2) provides higher performance than DPPFC (3.8 mWcm(-2)). Copyright (C) 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.