Journal
ELECTROCHEMISTRY COMMUNICATIONS
Volume 45, Issue -, Pages 79-82Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2014.05.018
Keywords
Photoelectrochemical reaction; Solar energy storage; Vanadium redox; Solar energy; Regenerative reaction
Categories
Funding
- National Science Foundation [ECCS-1254915]
- Div Of Electrical, Commun & Cyber Sys
- Directorate For Engineering [1254915] Funding Source: National Science Foundation
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A highly-efficient all-vanadium photoelectrochemical storage cell has been demonstrated in this work. This storage cell takes advantage of fast electrochemical kinetics of vanadium redox couples of VO2+VO2+ and V3+/V2+, and appears as a promising alternative to photoproduction of hydrogen from water. Continuous photocharging for 25 h revealed a VO2+ conversion rate of 0.0042 mu mol/h and Faradaic efficiency of 95% without external voltage bias. The incident photon-to-current efficiency (IPCE) at 350 nm light was calculated to be similar to 12%. (C) 2014 Elsevier B.V. All rights reserved.
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