Investigation of plasmonic Cu with controlled diameter over TiO2 photoelectrode for solar-to-hydrogen conversion |
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| Affiliation: | 1. Chemical and Environmental Bioprocess Engineering Group, Natural Resources Institute (IRENA), Universidad de León, Avda. de Portugal 41, 24009, León, Spain;2. Dpto. de Física Aplicada, Escuela Politécnica, Universidad de Extremadura, 10004 Cáceres, Spain;3. Grupo de Superficies y Materiales Porosos, Dpto. Física Aplicada, Facultad de Ciencias, Universidad de Valladolid, 47071, Valladolid, Spain;4. Department of Electrical Engineering and Automatic Systems, Universidad de León, Campus de Vegazana S/n, 24071 León, Spain;1. State Key Laboratory of Engines, Tianjin University, Tianjin, 300072, China;2. Division of Combustion Physics, Lund University, P.O. Box 118, SE-221 00, Lund, Sweden;1. Institute for Materials Research, Tohoku University, Katahira 2-1-1, Sendai, Miyagi, 980-8577, Japan;2. Department of Mechanical Engineering, Kyushu University, Motooka 744, Fukuoka, 819-0395, Japan;3. Department of Engineering and Applied Science, Sophia University, Kioi-cho, Chiyoda-ku, Tokyo, 102-8554, Japan;4. HYDROGENIUS, Kyushu University, Motooka 744, Fukuoka, 819-0395, Japan;1. Henan Key Laboratory of Polyoxometalate Chemistry, Henan Joint International Research Laboratory of Environmental Pollution Control Materials, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, 475004, PR China;2. Research Institute for Science and Technology, Photocatalysis International Research Center, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba, 278-8510, Japan;1. Division of Sustainable Development (DSD), College of Science and Engineering (CSE), Hamad Bin Khalifa University (HBKU), Qatar Foundation (QF), Doha, Qatar;2. Clean Energy Research Laboratory, Faculty of Engineering and Applied Science, University of Ontario Institute of Technology, 2000 Simcoe Street North, Oshawa, Ontario L1H 7K4, Canada |
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| Abstract: | Plasmonic metal nanoparticles (NPs) have been used to improve the solar-to-hydrogen conversion efficiency. Relative to Au and Ag, Cu is cheaper and more abundant. In the present work, Cu NPs with the controlled diameter were deposited on TiO2 nanotube arrays (TNTAs) by using a pulse electrochemical deposition method. When the deposition was cycled 3600 times, the size of Cu NPs can be tuned to approximately 30 nm with the most uniform distribution, resulting in the remarkable characteristic peak of surface plasmon resonance and higher photocurrent density. The hydrogen production rates remained unchanged during irradiation (AM 1.5, 100 mW/cm2) of 2 h, indicating a good stability of the resultant Cu/TNTAs electrode. The photoelectrochemical performances of as-prepared Cu/TNTAs can also be comparable to those of Ag/TNTAs electrode fabricated by the same method. |
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| Keywords: | Hydrogen production Plasmonic Cu TNTAs Pulse electrochemical deposition Stability |
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