Efficient generation of H2 by splitting water with an isothermal redox cycle

Christopher Muhich, Brian W. Evanko, Kayla C. Weston, Paul Lichty, Xinhua Liang, Janna Martinek, Charles B. Musgrave, Alan W. Weimer

Research output: Contribution to journalArticle

177 Citations (Scopus)

Abstract

Solar thermal water-splitting (STWS) cycles have long been recognized as a desirable means of generating hydrogen gas (H2) from water and sunlight. Two-step, metal oxide-based STWS cycles generate H2 by sequential high-temperature reduction and water reoxidation of a metal oxide. The temperature swings between reduction and oxidation steps long thought necessary for STWS have stifled STWS's overall efficiency because of thermal and time losses that occur during the frequent heating and cooling of the metal oxide. We show that these temperature swings are unnecessary and that isothermal water splitting (ITWS) at 1350°C using the "hercynite cycle" exhibits H2 production capacity >3 and >12 times that of hercynite and ceria, respectively, per mass of active material when reduced at 1350°C and reoxidized at 1000°C.

Original languageEnglish (US)
Pages (from-to)540-542
Number of pages3
JournalScience
Volume341
Issue number6145
DOIs
StatePublished - Jan 1 2013
Externally publishedYes

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Oxidation-Reduction
Water Cycle
Hot Temperature
Oxides
Water
Metals
Temperature
Sunlight
Heating
Hydrogen
Gases

ASJC Scopus subject areas

  • General

Cite this

Muhich, C., Evanko, B. W., Weston, K. C., Lichty, P., Liang, X., Martinek, J., ... Weimer, A. W. (2013). Efficient generation of H2 by splitting water with an isothermal redox cycle. Science, 341(6145), 540-542. https://doi.org/10.1126/science.1239454

Efficient generation of H2 by splitting water with an isothermal redox cycle. / Muhich, Christopher; Evanko, Brian W.; Weston, Kayla C.; Lichty, Paul; Liang, Xinhua; Martinek, Janna; Musgrave, Charles B.; Weimer, Alan W.

In: Science, Vol. 341, No. 6145, 01.01.2013, p. 540-542.

Research output: Contribution to journalArticle

Muhich, C, Evanko, BW, Weston, KC, Lichty, P, Liang, X, Martinek, J, Musgrave, CB & Weimer, AW 2013, 'Efficient generation of H2 by splitting water with an isothermal redox cycle', Science, vol. 341, no. 6145, pp. 540-542. https://doi.org/10.1126/science.1239454
Muhich C, Evanko BW, Weston KC, Lichty P, Liang X, Martinek J et al. Efficient generation of H2 by splitting water with an isothermal redox cycle. Science. 2013 Jan 1;341(6145):540-542. https://doi.org/10.1126/science.1239454
Muhich, Christopher ; Evanko, Brian W. ; Weston, Kayla C. ; Lichty, Paul ; Liang, Xinhua ; Martinek, Janna ; Musgrave, Charles B. ; Weimer, Alan W. / Efficient generation of H2 by splitting water with an isothermal redox cycle. In: Science. 2013 ; Vol. 341, No. 6145. pp. 540-542.
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