Thin-Layer Fe2TiO5 on Hematite for Efficient Solar Water Oxidation
A thin Fe2TiO5 layer was produced on hematite either by evaporating a TiCl4 solution on FeOOH or by a simple HF-assisted Ti treatment of FeOOH, both followed by annealing. The prepared Fe2TiO5-hematite heterostructure showed a significant enhancement in photocurrent density compared to that of the p...
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| Veröffentlicht in: | ACS nano 2015-05, Vol.9 (5), p.5348 |
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| creator | Deng, Jiujun Lv, Xiaoxin Liu, Jinyin Zhang, Hui Nie, Kaiqi Hong, Caihao Wang, Jiaou Sun, Xuhui Zhong, Jun Lee, Shuit-Tong |
| description | A thin Fe2TiO5 layer was produced on hematite either by evaporating a TiCl4 solution on FeOOH or by a simple HF-assisted Ti treatment of FeOOH, both followed by annealing. The prepared Fe2TiO5-hematite heterostructure showed a significant enhancement in photocurrent density compared to that of the pristine hematite. For example, the sample after HF-assisted Ti treatment exhibited a significantly enhanced photocurrent of 2.0 mA/cm2 at 1.23 V vs RHE. Moreover, the performance of the Fe2TiO5-hematite heterostructure can be further improved by coupling with Co-Pi catalysts, achieving a higher photocurrent of 2.6 mA/cm2 at 1.23 V vs RHE. Synchrotron-based soft X-ray absorption spectroscopy analyses clearly revealed the existence of an Fe2TiO5 structure on hematite forming a heterojunction, which reduced the photogenerated hole accumulation and then improved the performance. |
| doi_str_mv | 10.1021/acsnano.5b01028 |
| format | Article |
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The prepared Fe2TiO5-hematite heterostructure showed a significant enhancement in photocurrent density compared to that of the pristine hematite. For example, the sample after HF-assisted Ti treatment exhibited a significantly enhanced photocurrent of 2.0 mA/cm2 at 1.23 V vs RHE. Moreover, the performance of the Fe2TiO5-hematite heterostructure can be further improved by coupling with Co-Pi catalysts, achieving a higher photocurrent of 2.6 mA/cm2 at 1.23 V vs RHE. 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| title | Thin-Layer Fe2TiO5 on Hematite for Efficient Solar Water Oxidation |
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