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Investigation of hydrogen generation from sodium borohydride using different cobalt catalysts
Authors:A Balčiūnaitė  Z Sukackienė  K Antanavičiūtė  J Vaičiūnienė  A Naujokaitis  L Tamašauskaitė-Tamašiūnaitė  E Norkus
Affiliation:Department of Catalysis, Center for Physical Sciences and Technology, Saul?tekio Ave. 3, LT-10257, Vilnius, Lithuania
Abstract:Effective Co/Cu, CoB/Cu, and CoBM (M = Mo,Zn,Fe)/Cu catalysts were prepared on the copper surface by a simple electroless deposition method using a morpholine borane as a reducing agent in the glycine solution. The activity of the deposited catalysts was investigated for hydrogen generation from an alkaline sodium borohydride solution. It was determined that these synthesized catalysts demonstrated the catalytic activity for the hydrolysis reaction of NaBH4. The lowest obtained activation energy (EA) of the hydrolysis reaction of NaBH4was 27 kJ mol?1 for the CoBMo/Cu catalyst. The hydrogen generation rate of 15.30 ml min?1 was achieved using CoBMo/Cu catalysts at 313 K and it increased ~3.5 times with the increase of temperature to 343 K. The highest hydrogen generation rate obtained by CoBMo/Cu films may be related to the hierarchical cauliflower-shaped 3D structures and the high roughness surface area. Moreover, the CoBMo/Cu catalyst showed an excellent reusability.
Keywords:Hydrogen generation  Borohydride  Electroless deposition  Cobalt  Catalyst
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