An alkaline direct NaBH4–H2O2 fuel cell with high power density

✍ Scribed by Dianxue Cao; Dandan Chen; Jian Lan; Guiling Wang

• Publisher: Elsevier Science
• Year: 2009
• Tongue: English
• Weight: 694 KB
• Volume: 190
• Category: Article
• ISSN: 0378-7753
• DOI: 10.1016/j.jpowsour.2008.12.134

✦ Synopsis

A high performance alkaline direct borohydride-hydrogen peroxide fuel cell with Pt-Ru catalyzed nickel foam as anode and Pd-Ir catalyzed nickel foam as cathode is reported. The electrodes were prepared by electrodeposition of the catalyst components on nickel foam. Their morphology and composition were analyzed by SEM-EDX. The effects of concentrations of NaBH 4 and H 2 O 2 as well as operation temperature on the cell performance were investigated. The cell exhibited an open circuit voltage of about 1.0 V and a peak power density of 198 mW cm -2 at a current density of 397 mA cm -2 and a cell voltage of 0.5 V using 0.2 mol dm -3 NaBH 4 as fuel and 0.4 mol dm -3 H 2 O 2 as oxidant operating at room temperature. Electrooxidation of NaBH 4 on Pt-Ru nanoparticles was studied using a rotating disk electrode and complete 8e - oxidation was observed in 2 mol dm -3 NaOH solution containing 0.01 mol dm -3 NaBH 4 .