Atomic layer deposited thin film metal oxides for fuel production in a solar cavity reactor

Paul Lichty, Xinhua Liang, Christopher Muhich, Brian Evanko, Carl Bingham, Alan W. Weimer

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

Alumina thin film structures were produced by coating high surface area polymer particles via atomic layer deposition (ALD), using the polymer as a sacrificial template. Burnout of the polymer material left high surface area, high pore volume structures, with 15 nm wall thickness. Further deposition of up to 27 mol% Co and Fe was performed via ALD to produce high surface area CoFe 2O 4 particles for thermochemical water splitting. The ALD particles were thermally cycled in electrically heated lab reactors and on-sun using a concentrated solar, reflective cavity reactor. Surface area measurements of cycled ALD particles showed improved surface area retention as compared to bulk Fe 2O 3 nanopowders. Reaction rates as high as 15.2 and 9.8 μmol/s/g were observed, on-sun, for H 2O and CO 2 splitting respectively. Thermochemical cycling in a concentrated solar cavity reactor showed an order of magnitude increase in solar utilization efficiency between ALD particles and bulk Fe 2O 3 nanopowders.

Original languageEnglish (US)
Pages (from-to)16888-16894
Number of pages7
JournalInternational Journal of Hydrogen Energy
Volume37
Issue number22
DOIs
StatePublished - Nov 1 2012
Externally publishedYes

Fingerprint

fuel production
Atomic layer deposition
atomic layer epitaxy
metal oxides
reactors
Thin films
cavities
Oxides
thin films
Metals
Sun
polymers
sun
Polymers
burnout
water splitting
Reaction rates
reaction kinetics
Alumina
templates

Keywords

  • Atomic layer deposition
  • Concentrated solar reactor
  • Hydrogen
  • Solar thermal

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

Cite this

Atomic layer deposited thin film metal oxides for fuel production in a solar cavity reactor. / Lichty, Paul; Liang, Xinhua; Muhich, Christopher; Evanko, Brian; Bingham, Carl; Weimer, Alan W.

In: International Journal of Hydrogen Energy, Vol. 37, No. 22, 01.11.2012, p. 16888-16894.

Research output: Contribution to journalArticle

Lichty, Paul ; Liang, Xinhua ; Muhich, Christopher ; Evanko, Brian ; Bingham, Carl ; Weimer, Alan W. / Atomic layer deposited thin film metal oxides for fuel production in a solar cavity reactor. In: International Journal of Hydrogen Energy. 2012 ; Vol. 37, No. 22. pp. 16888-16894.
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