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Molecules 2016, 21(7), 868; doi:10.3390/molecules21070868

Doping-Promoted Solar Water Oxidation on Hematite Photoanodes

1
Beijing National Laboratory for Molecular Sciences, Key Laboratory of Photochemistry, Institute of Chemistry, The Chinese Academy of Sciences, Beijing 100190, China
2
University of Chinese Academy of Sciences, Beijing 100049, China
*
Authors to whom correspondence should be addressed.
Academic Editor: Nick Serpone
Received: 16 May 2016 / Revised: 15 June 2016 / Accepted: 25 June 2016 / Published: 1 July 2016
(This article belongs to the Special Issue Photocatalytic Water Splitting—the Untamed Dream)
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Abstract

As one of the most promising materials for solar water oxidation, hematite has attracted intense research interest for four decades. Despite their desirable optical band gap, stability and other attractive features, there are great challenges for the implementation of hematite-based photoelectrochemical cells. In particular, the extremely low electron mobility leads to severe energy loss by electron hole recombination. Elemental doping, i.e., replacing lattice iron with foreign atoms, has been shown to be a practical solution. Here we review the significant progresses in metal and non-metal element doping-promoted hematite solar water oxidation, focusing on the role of dopants in adjusting carrier density, charge collection efficiency and surface water oxidation kinetics. The advantages and salient features of the different doping categories are compared and discussed. View Full-Text
Keywords: water splitting; hematite; doping; charge transfer water splitting; hematite; doping; charge transfer
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MDPI and ACS Style

Zhang, Y.; Ji, H.; Ma, W.; Chen, C.; Song, W.; Zhao, J. Doping-Promoted Solar Water Oxidation on Hematite Photoanodes. Molecules 2016, 21, 868.

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