Toward solar fuels

Water splitting with sunlight and "rust" ?

Michael J. Katz, Shannon C. Riha, Nak Cheon Jeong, Alex B F Martinson, Omar K. Farha, Joseph T Hupp

Research output: Contribution to journalArticle

168 Citations (Scopus)

Abstract

Iron(III)oxide in the form of hematite is, in many respects, an attractive material for the photocatalytic production of molecular oxygen from water. Especially over the past six years, several developments have advanced the performance of water oxidation cells based on this material. Nevertheless, the best versions of these photoelectrodes produce only about a fifth of the maximum photocurrent (and dioxygen) theoretically obtainable, while operating at photovoltages also well short of the theoretical maximum. Here we describe the factors limiting the performance of hematite as a photo-catalyst and outline approaches that have been, or might be, tried to overcome them. These factors include low hole mobility, bulk charge recombination, surface charge recombination, slow water oxidation kinetics, and poor light absorption. Whether hematite will soon become a practical photo-catalyst for water oxidation is uncertain. But, the schemes developed and the lessons learned will likely prove transferrable to other candidate photocatalyst materials.

Original languageEnglish
Pages (from-to)2521-2529
Number of pages9
JournalCoordination Chemistry Reviews
Volume256
Issue number21-22
DOIs
Publication statusPublished - Nov 2012

Fingerprint

rust fungi
water splitting
sunlight
Hematite
hematite
Water
Oxidation
water
oxidation
catalysts
Catalysts
Hole mobility
Molecular oxygen
lessons learned
photovoltages
hole mobility
Surface charge
Photocatalysts
electromagnetic absorption
Photocurrents

Keywords

  • Alternative energy
  • Hematite
  • Solar fuels

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

Katz, M. J., Riha, S. C., Jeong, N. C., Martinson, A. B. F., Farha, O. K., & Hupp, J. T. (2012). Toward solar fuels: Water splitting with sunlight and "rust" ? Coordination Chemistry Reviews, 256(21-22), 2521-2529. https://doi.org/10.1016/j.ccr.2012.06.017

Toward solar fuels : Water splitting with sunlight and "rust" ? / Katz, Michael J.; Riha, Shannon C.; Jeong, Nak Cheon; Martinson, Alex B F; Farha, Omar K.; Hupp, Joseph T.

In: Coordination Chemistry Reviews, Vol. 256, No. 21-22, 11.2012, p. 2521-2529.

Research output: Contribution to journalArticle

Katz, MJ, Riha, SC, Jeong, NC, Martinson, ABF, Farha, OK & Hupp, JT 2012, 'Toward solar fuels: Water splitting with sunlight and "rust" ?', Coordination Chemistry Reviews, vol. 256, no. 21-22, pp. 2521-2529. https://doi.org/10.1016/j.ccr.2012.06.017
Katz, Michael J. ; Riha, Shannon C. ; Jeong, Nak Cheon ; Martinson, Alex B F ; Farha, Omar K. ; Hupp, Joseph T. / Toward solar fuels : Water splitting with sunlight and "rust" ?. In: Coordination Chemistry Reviews. 2012 ; Vol. 256, No. 21-22. pp. 2521-2529.
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