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

doi:10.1016/j.ijhydene.2012.08.004

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 journal › Article › peer-review

31 Scopus citations

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 language	English (US)
Pages (from-to)	16888-16894
Number of pages	7
Journal	International Journal of Hydrogen Energy
Volume	37
Issue number	22
DOIs	https://doi.org/10.1016/j.ijhydene.2012.08.004
State	Published - Nov 2012
Externally published	Yes

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

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10.1016/j.ijhydene.2012.08.004

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title = "Atomic layer deposited thin film metal oxides for fuel production in a solar cavity reactor",

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.",

keywords = "Atomic layer deposition, Concentrated solar reactor, Hydrogen, Solar thermal",

author = "Paul Lichty and Xinhua Liang and Christopher Muhich and Brian Evanko and Carl Bingham and Weimer, {Alan W.}",

year = "2012",

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doi = "10.1016/j.ijhydene.2012.08.004",

language = "English (US)",

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pages = "16888--16894",

journal = "International Journal of Hydrogen Energy",

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TY - JOUR

T1 - Atomic layer deposited thin film metal oxides for fuel production in a solar cavity reactor

AU - Lichty, Paul

AU - Liang, Xinhua

AU - Muhich, Christopher

AU - Evanko, Brian

AU - Bingham, Carl

AU - Weimer, Alan W.

PY - 2012/11

Y1 - 2012/11

N2 - 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.

AB - 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.

KW - Atomic layer deposition

KW - Concentrated solar reactor

KW - Hydrogen

KW - Solar thermal

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VL - 37

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EP - 16894

JO - International Journal of Hydrogen Energy

JF - International Journal of Hydrogen Energy

IS - 22

ER -

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

Abstract

Keywords

ASJC Scopus subject areas

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