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Proceedings Paper

ZnO nanorod electrodes for hydrogen evolution and storage
Author(s): S. Harinipriya; B. Usmani; D. J. Rogers; V. E. Sandana; F. Hosseini Teherani; A. Lusson; P. Bove; H.-J. Drouhin; M. Razeghi
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Paper Abstract

Due to the attractive combination of a relatively high specific heat of combustion with a large specific energy capacity, molecular hydrogen (H2) is being investigated for use as an alternative to fossil fuels. Energy-efficient H2 production and safe storage remain key technical obstacles to implementation of an H2 based economy, however. ZnO has been investigated for use as an alternative photocatalytic electrode to TiO2 for solarpowered photo-electro-chemical (PEC) electrolysis, in which H2 is generated by direct water splitting in a cell with a metal cathode and a semiconducting anode. In this investigation, ZnO NR grown on Si (100) substrates by pulsed laser deposition were investigated for use as electrodes in the Hydrogen Evolution Reaction (HER). The electrochemical potential and Fermi energy of the ZnO NR were estimated from the electrochemical current density in acid and alkaline solutions via phenomenological thermodynamic analysis. As well as acting as an effective electrocalytic cathode, the ZnO NR appear to operate as a hydrogen reservoir. These results indicate that the ZnO NR have excellent potential for the storage of evolved H2.

Paper Details

Date Published: 29 February 2012
PDF: 10 pages
Proc. SPIE 8263, Oxide-based Materials and Devices III, 82631Y (29 February 2012); doi: 10.1117/12.927622
Show Author Affiliations
S. Harinipriya, Indian Institute of Technology Rajasthan (India)
B. Usmani, Indian Institute of Technology Rajasthan (India)
D. J. Rogers, Nanovation (France)
V. E. Sandana, Nanovation (France)
GEMAC (France)
Ecole Polytechnique (France)
F. Hosseini Teherani, Nanovation (France)
A. Lusson, GEMAC (France)
P. Bove, Nanovation (France)
H.-J. Drouhin, Ecole Polytechnique (France)
M. Razeghi, Northwestern Univ. (United States)

Published in SPIE Proceedings Vol. 8263:
Oxide-based Materials and Devices III
Ferechteh H. Teherani; David C. Look; David J. Rogers, Editor(s)

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