Journal
JOURNAL OF POWER SOURCES
Volume 130, Issue 1-2, Pages 56-60Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2003.12.033
Keywords
hydrogen-storage alloy electrode; sorbitol; glucose; catalytic reduction
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Electrolysis of glucose was performed at constant potential using hydrogen-storage alloy as catalytic reduction electrode. A superficial treatment and activation of the hydrogen-storage alloy powder had an obvious effect on improving the current efficiency for the generation of sorbitol. The most favorable results were obtained when a current density of 8 mA cm(-2), a voltage of 4.0-5.0 V and a pH of 8 at a temperature of 30 degreesC are used. Prior to use the electrode was treated for 2 h at 80 degreesC with a solution containing KBH4 (0.5 mol/l), KF (0.5 mol/l) and KOH (6 mol/l). Under optimized conditions the current efficiency for sorbitol by electrolyzing glucose exceeded 90%. The yield of sorbitol was around 80%. The lifetime of the electrode was tested and analyzed, and methods of regeneration are discussed. (C) 2004 Elsevier B.V. All rights reserved.
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