A review and perspective of efficient hydrogen generation via solar thermal water splitting

Christopher L. Muhich, Brian D. Ehrhart, Ibraheam Al-Shankiti, Barbara J. Ward, Charles B. Musgrave, Alan W. Weimer

Research output: Contribution to journalReview article

106 Scopus citations

Abstract

Solar thermal water splitting (STWS) produces renewable hydrogen from water using concentrated sunlight. Because it utilizes energy from the entire solar spectrum to directly drive the redox reactions that split water, it can achieve high theoretical solar-to-hydrogen efficiencies. In two-step STWS, a metal oxide is first heated by concentrated sunlight to high temperatures to reduce it and produce O2. In the second step, the reduced material is exposed to H2O to reoxidize it to its original oxidation state and produce H2. Various aspects of this process are reviewed in this work, including the reduction and oxidation chemistries of the active redox materials, the effects of operating conditions, and the solar thermal reactors in which the STWS reactions occur, and a perspective is given on the future optimization of STWS.

Original languageEnglish (US)
Pages (from-to)261-287
Number of pages27
JournalWiley Interdisciplinary Reviews: Energy and Environment
Volume5
Issue number3
DOIs
StatePublished - May 1 2016
Externally publishedYes

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Environmental Science(all)

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