NDLI: Ternary cobalt spinel oxides for solar driven hydrogen production: Theory and experiment

Content Provider	Royal Society of Chemistry (RSC)
Author	Wang, Heli Turner, John A. Huda, Muhammad N. Ahn, Kwang-Soon Shet, Sudhakar Walsh, Aron Wei, Su-Huai Deutsch, Todd G. Yan, Yanfa Al-Jassim, Mowafak M.
Copyright Year	2009
Abstract	Discovery of a chemically stable, light absorbing and low resistivity metal oxide with band edges aligned to the water redox potentials has been a goal of physical scientists for the past forty years. Despite an immense amount of effort, no solution has been uncovered. We present a combined theoretical and experimental exploration of a series of unconventional ternary cobalt spinel oxides, which offer chemical functionality through substitution on the octahedral spinel B site. First-principles predictions of the substitution of group 13 cations (Al, Ga, In) in Co3O4 to form a series of homologous CoX2O4 spinel compounds are combined with experimental synthesis and photoelectrochemical characterization. Ultimately, while tunable band gaps in the visible range can be obtained, the material performance is limited by poor carrier transport properties associated with small polaron carriers. Future design pathways for metal oxide exploration are discussed.
Starting Page	774
Ending Page	782
Page Count	9
File Format	HTM / HTML PDF
ISSN	17545692
Volume Number	2
Issue Number	7
Journal	Energy & Environmental Science
DOI	10.1039/b822903a
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Electrical resistivity and conductivity Redox Cobalt Spinel Boron group Gallium Photoelectrochemical cell Polaron
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Pollution Renewable Energy, Sustainability and the Environment Nuclear Energy and Engineering

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