Electrooxidation of hydrogen peroxide and sodium borohydride on Ni deposited carbon fiber electrode for alkaline fuel cells
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, cilt.36, sa.16, ss.10013-10021, 2011 (SCI-Expanded, Scopus)
- 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.