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  Template-free synthesis of Ta3N5 nanorod arrays for efficient photoelectrochemical water splitting  
C. Zhen, L. Z. Wang, G. Liu*, G. Q. Lu, H. M. Cheng
Chemical Communications,49 (29), 3019-3021 [PDF Download]
    We report the template-free synthesis of Ta3N5 nanorod array films grown on Ta foil by a combination of a vapor-phase hydrothermal process and subsequent nitriding. The Ta3N5 nanorod array film modified with Co(OH)(x) when used as a photoanode in a photoelectrochemical cell for water splitting yields a stable photocurrent density of 2.8 mA cm(-2) at 1.23 V-RHE under AM 1.5G simulated sunlight. The incident photon-to-current conversion efficiency at 480 nm is determined to be 37.8%.
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