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A highly efficient nanorod photoanode for solar‐driven photoelectrochemical (PEC) water splitting is reported by Kazunari Domen and co‐workers on page 125. The cover image illustrates vertically aligned semiconductor nanorods grown in situ on a metal substrate. The single crystalline 1D nanostructure with low contact barrier makes them ideal building blocks of PEC cells for efficient solar energy...
A vertically aligned Ta3N5 nanorod photoelectrode is fabricated by through‐mask anodization and nitridation for water splitting. The Ta3N5 nanorods, working as photoanodes of a photoelectrochemical cell, yield a high photocurrent density of 3.8 mA cm−2 at 1.23 V versus a reversible hydrogen electrode under AM 1.5G simulated sunlight and an incident photon‐to‐current conversion efficiency of 41.3%...
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