Direct borohydride/peroxide fuel cells using Prussian Blue cathodes

• Type: Article in International Scientific Journal
• Date: 2012

Authors

Saturnino, PG (Author) Other; Lobo, RFM (Author) Other; Sequeira, CAC (Author) Other

Journal

Title: Journal of Power Sources

Vol. 208

Pages: 131-137

ISSN: 0378-7753

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 50 Citations

Scopus - 52 Citations

Other information

Authenticus ID: P-002-8ZP

DOI: 10.1016/j.jpowsour.2012.02.016

Abstract (EN): Direct borohydride fuel cells (DBFCs) are receiving much attention during the last decade. Many researchers are now focused on DBFCs operating on sodium borohydride (NaBH4) as the fuel and hydrogen peroxide (H2O2) as the oxidant. In the present work, direct NaBH4/H2O2 fuel cells consisting of platinum (Pt) anodes, a Prussian Blue (PB)-coated Pt or a Pt cathode, and a Nafion N117 membrane as the separator, are assembled. The effect of different operational conditions, namely the fuel (NaBH4 + NaOH) and oxidant (H2O2 + HCl) compositions, as well as the operation temperature, on the performance of these DBFCs is investigated. The obtained results are evaluated and the most suitable conditions for the operation of these NaBH4/H2O2 systems are proposed. The use of the PB-coated electrode can lead to up to a 50% increase in the peak power density, as compared to the cell using a single Pt cathode. At 65 degrees C, the DBFC using the PB-modified electrode attained over 200 mW cm(-2), at a cell voltage of 0.8 V.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 7