High temperature activation of hematite nanorods for sunlight driven water oxidation reaction

文献情報

出版日 2017-08-24

DOI 10.1039/C7CP04827K

インパクトファクター 3.676

著者

Nathalie Minko Ito, Waldemir Moura Carvalho, Jr, Dereck Nills Ferreira Muche, Ricardo Hauch Ribeiro Castro, Gustavo Martini Dalpian

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要旨

Here we show that chlorine species originating from commonly used iron precursors annihilate the hematite nanorod photocurrent by providing recombination pathways. Although hematite nanorod films could be obtained by thermal decomposition of the iron oxyhydroxide phase (β-FeOOH), indistinguishable photocurrent responses under dark and sunlight irradiation conditions were observed until the nanorods were annealed (activated) at 750 °C. The annealing led to the elimination of observable chlorine species and allowed photocurrent responses of 1.3 mA cm−2 at 1.23 V vs. RHE, which is comparable to the best results found in the literature, suggesting that residual chlorine species from the synthesis can act as electron traps and recombination sites for photogenerated holes.

掲載誌

Physical Chemistry Chemical Physics

CiteScore: 5.5

自己引用率: 10.3%

年間論文数: 3036

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