Journal
JOURNAL OF POWER SOURCES
Volume 196, Issue 22, Pages 9579-9584Publisher
ELSEVIER
DOI: 10.1016/j.jpowsour.2011.06.079
Keywords
Urea electrolysis; Hydrogen production; Electrodeposition; Multi-metal electrocatalysts
Funding
- Chemical and Biomolecular Engineering Department
- Center for Electrochemical Engineering Research at Ohio University
- Department of Defense through the U.S. Army Construction Engineering Research Laboratory [W9132T-09-1-0001]
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It has been shown that urea electrolysis is a viable method for wastewater remediation and simultaneous production of valuable hydrogen. Inexpensive nickel catalyst is optimal for the oxidation of urea in alkaline media but improvements are needed to minimize surface blockage and increase current density. Multi-metal catalysts were investigated by depositing platinum group metals on a nickel substrate. Rhodium and nickel proved synergistic to reduce surface blockage and increase catalyst stability. Rh-Ni electrodes reduced the overpotential for the electro-oxidation of urea and improved the current density by a factor of 200 compared to a Ni catalyst. (C) 2011 Elsevier B.V. All rights reserved.
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