Investigation of metal alloy catalyst for hydrogen release from sodium borohydride for polymer electrolyte membrane fuel cell application

Sodium borohydride (NaBH4) is a promising candidate for storing hydrogen in portable fuel cell systems. In order to reduce the volume and cost of the hydrogen generation systems, a high-performance catalyst containing a less precious metal is imperative. In this present investigation, a number of metal alloy compositions are compared in a high throughput screening (FITS) test. In the case of tertiary alloy suspension, the hydrogen release rate of Ru60Co20Fe20 shows highest H-2 release (26.8 L min(-1) g(-1)). In the case of the activated carbon fiber (ACF) supported ruthenium catalyst, the reduction process plays an important role in both the particle size of the formed catalyst and consequent enhancement of the hydrogen release rate. Ru60Co20Fe20/ACF showed its highest hydrogen release rate at 41.73 L min(-1) g(Ru)(-1). The prepared catalysts were analyzed by XRD and XPS spectra. The suitability of the catalyst in the real proton exchange membrane fuel cell application has been examined and it shows the applicability for common use. (C) 2008 International Association for Hydrogen Energy. Published by Elsevier Ltd. All rights reserved.