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- W2412341485 abstract "Ultrathin TiO2 is deposited on conventional hydrothermal grown hematite nanorod arrays by atomic layer deposition (ALD). Significant photoelectrochemical water oxidation performance improvement is observed when the ALD TiO2-treated samples are annealed at 650 °C or higher temperatures. The electrochemical impedance spectroscopy (EIS) study shows a surface trap-mediated charge transfer process exists at the hematite-electrolyte interface. Thus, one possible reason for the improvement could be the increased surface states at the hematite surface, which leads to better charge separation, less electron-hole recombination, and hence, greater improvement of photocurrent. Our Raman study shows the increase in surface defects on the ALD TiO2-coated hematite sample after being annealed at 650 °C or higher temperatures. A photocurrent of 1.9 mA cm(-2) at 1.23 V (vs RHE) with a maximum of 2.5 mA cm(-2) at 1.8 V (vs RHE) in 1 M NaOH under AM 1.5 simulated solar illumination is achieved in optimized deposition and annealing conditions." @default.
- W2412341485 created "2016-06-24" @default.
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- W2412341485 date "2015-07-30" @default.
- W2412341485 modified "2023-10-05" @default.
- W2412341485 title "Revealing the Role of TiO<sub>2</sub> Surface Treatment of Hematite Nanorods Photoanodes for Solar Water Splitting" @default.
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- W2412341485 doi "https://doi.org/10.1021/acsami.5b01394" @default.
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