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The rise of hematite: origin and strategies to reduce the high onset potential for the oxygen evolution reaction

Beniamino Iandolo (Institutionen för teknisk fysik, Kemisk fysik) ; Björn Wickman (Institutionen för teknisk fysik, Kemisk fysik) ; Igor Zoric (Institutionen för teknisk fysik, Kemisk fysik) ; Anders Hellman (Institutionen för teknisk fysik, Kemisk fysik)
Journal of Materials Chemistry A (2050-7488). Vol. 3 (2015), 33, p. 16896-16912.
[Artikel, refereegranskad vetenskaplig]

Hematite (alpha-Fe2O3) has emerged as a promising material for photoelectrochemical (PEC) water splitting thanks to its abundance, stability in an aqueous environment, favorable optical bandgap and position of the electronic valence band. Nevertheless, its performance as a photoanode is considerably lower than what is theoretically achievable. In particular, the high electrochemical potential usually needed to initiate water oxidation is detrimental to the prospect of using hematite for practical devices. In this review we elucidate the appealing, as well as the challenging, aspects of using hematite for PEC water splitting and focus on the recent efforts towards lowering the onset potential of water oxidation. We examine and rationalize several strategies pursued to achieve this goal involving manipulation of the hematite/electrolyte interface, as well as improving relevant properties of hematite itself.

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Denna post skapades 2015-09-11. Senast ändrad 2015-09-22.
CPL Pubid: 222287


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Institutionen för teknisk fysik, Kemisk fysik (1900-2015)



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