• Balciunaite, Aldona
• Sukackiene, Zita
• Norkus, Eugenijus
• Tamašauskaitė-Tamašiūnaitė, Loreta

Abstract

<jats:p>The effective Co, CoB and CoBM, where M = Mo, Zn, and Fe, catalysts have been deposited on the Cu surface by a simple electroless metal deposition method using morpholine borane as a reducing agent and used as catalysts for hydrogen generation from an alkaline NaBH<jats:sub>4</jats:sub> solution. The catalytic activity of different cobalt alloys catalysts towards the hydrolysis of NaBH<jats:sub>4</jats:sub> has been investigated by measuring the amount of generated hydrogen from an alkaline solution contained 5 wt. % NaBH<jats:sub>4</jats:sub> and 0.4 wt. % NaOH. The rate of H<jats:sub>2</jats:sub> generation has been measured at solution temperatures in the range from 298 to 318 K in order to determine the activation energy.</jats:p><jats:p>It has been determined that the synthesized Co/Cu, CoB/Cu and CoBM (M=Mo,Zn,Fe)/Cu catalysts demonstrate the catalytic activity for the hydrolysis reaction of NaBH<jats:sub>4</jats:sub>. The lowest obtained activation energy of the hydrolysis reaction of NaBH<jats:sub>4</jats:sub> has been 27 kJ mol<jats:sup>-1</jats:sup> for the CoBMo/Cu catalyst. The hydrogen generation rate has been achieved 15.30 ml min<jats:sup>-1</jats:sup> using the CoBMo/Cu catalyst at a temperature of 313 K and it increases ~3.5 times with the increase of temperature to 343 K. Moreover, the CoBMo/Cu catalyst shows a highest catalytic activity for hydrogen generation from the alkaline NaBH<jats:sub>4</jats:sub> solution as compared with that for other Co/Cu, CoB/Cu, CoBZn/Cu, and CoBFe/Cu catalysts.</jats:p>

Topics

• Deposition
• surface
• Hydrogen
• cobalt
• activation
• cobalt alloy