In situ metal doping during modified anodization synthesis of Nb2O5 with enhanced photoelectrochemical water splitting |
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| Authors: | Chenyan Hu Wey Yang Teoh Shulin Ji Changhui Ye Akihide Iwase |
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| Affiliation: | 1. Clean Energy and Nanotechnology (CLEAN) Laboratory, School of Energy and Environment, City University of Hong Kong, Kowloon, Hong Kong S.A.R.;2. Anhui Key Laboratory of Nanomaterials and Technology and Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, P.R. China;3. Dept. of Applied Chemistry, Tokyo University of Science, Tokyo, Japan |
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| Abstract: | A new technique of in situ doping of alkali metal (Li+, Na+, K+, Rb+, and Cs+) in Nb2O5 was showcased by the modified anodization of Nb foils at high frequency, negative‐to‐positive pulsed voltage. At the optimized dopant concentration and synthesis condition, the doped‐Nb2O5 shows twofold enhancement in photoelectrochemical water splitting efficiencies compared with the undoped Nb2O5 electrode, as a result of improved charge carrier density and enhanced surface charge transfer. © 2015 American Institute of Chemical Engineers AIChE J, 62: 352–358, 2016 |
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| Keywords: | water splitting hydrogen photoelectrode pulsed anodization doping |
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