ZnO nanorod electrodes for hydrogen evolution and storage

S. Harinipriya*, B. Usmani, D. J. Rogers, V. E. Sandana, F. Hosseini Teherani, A. Lusson, P. Bove, H. J. Drouhin, M. Razeghi

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Scopus citations

Abstract

Due to the attractive combination of a relatively high specific heat of combustion with a large specific energy capacity, molecular hydrogen (H 2) is being investigated for use as an alternative to fossil fuels. Energy-efficient H 2 production and safe storage remain key technical obstacles to implementation of an H 2 based economy, however. ZnO has been investigated for use as an alternative photocatalytic electrode to TiO 2 for solarpowered photo-electro-chemical (PEC) electrolysis, in which H 2 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 H 2.

Original languageEnglish (US)
Title of host publicationOxide-Based Materials and Devices III
DOIs
StatePublished - 2012
EventOxide-Based Materials and Devices III - San Francisco, CA, United States
Duration: Jan 22 2012Jan 25 2012

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume8263
ISSN (Print)0277-786X

Other

OtherOxide-Based Materials and Devices III
Country/TerritoryUnited States
CitySan Francisco, CA
Period1/22/121/25/12

Keywords

  • Cyclic Voltammetry
  • Hydrogen Evolution Reaction
  • Nanowires
  • Pulsed Laser Deposition
  • ZnO

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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