Vertically aligned Ta3N5 nanorod arrays for solar-driven photoelectrochemical water splitting
Cha, Dong Kyu
KAUST DepartmentImaging and Characterization Core Lab
Advanced Nanofabrication, Imaging and Characterization Core Lab
Biological and Environmental Sciences and Engineering (BESE) Division
KAUST Catalysis Center (KCC)
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AbstractA 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% at 440 nm, one of the highest activities reported for photoanodes so far. Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
SponsorsThis work was supported in part by a Grant-in-Aid for Specially Promoted Research (23000009) from Japan Society for the Promotion of Science (JSPS) and the Advanced Low Carbon Technology Research and Development Program (ALCA) of the Japan Science and Technology Agency (JST). This work was also carried out under the international exchange program of the A3 Foresight Program of JSPS. The author Li acknowledges support from JSPS as a postdoctoral fellow. The authors thank Prof. Shigeo Maruyama, Prof. Reo Kometani, and Dr. Miao Zhong for SEM characterization.