Polyoxometalate multi-electron-transfer catalytic systems for water splitting

Jordan M. Sumliner, Hongjin Lv, John Fielden, Yurii V. Geletii, Craig L. Hill

Research output: Contribution to journalArticlepeer-review

74 Citations (Scopus)
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Abstract

The viable production of solar fuels requires a visible-light-absorbing unit, a H2O (or CO2) reduction catalyst (WRC), and a water oxidation catalyst (WOC) that work in tandem to split water or reduce CO2 with H2O rapidly, selectively, and for long periods of time. Most catalysts and photosensitizers developed to date for these triadic systems are oxidatively, thermally, and/or hydrolytically unstable. Polyoxometalates (POMs) constitute a huge class of complexes with extensively tunable properties that are oxidatively, thermally, and (over wide and adjustable pH ranges) hydrolytically stable. POMs are some of the fastest and most stable WOCs to date under optimal conditions. This Microreview updates the very active POM WOC field; it reports the application of POMs as WRCs and initial self-assembling metal oxide semiconductor–photosensitizer–POM catalyst triad photoanodes. The complexities of investigating these POM systems, including but not limited to the study of POM-hydrated metal-ion–metal-oxide speciation processes, are outlined. The achievements and challenges in POM WOC, WRC, and triad research are outlined.
Original languageEnglish
Pages (from-to)635-644
Number of pages10
JournalEuropean Journal of Inorganic Chemistry
Volume2014
DOIs
Publication statusPublished - 17 Jan 2014

Keywords

  • Polyoxometalates
  • Water splitting
  • Photochemistry
  • Supported catalysts
  • POM-based triads

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