Bimetallic PtNi alloy modified 2D g-C3N4 nanosheets as an efficient cocatalyst for enhancing photocatalytic hydrogen evolution |
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| Affiliation: | 1. Jiangsu Optoelectronic Functional Materials and Engineering Research Center, School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, China;2. ZYfire Hose Co., Ltd, Taizhou, 225599, Jiangsu Province, PR China;1. Department of Mathematics, National Institute of Technology Agartala, India;2. Mechanical Engineering Department, NIT Agartala Jirania, West Tripura, 799046, India;1. School of New Energy and Materials, Southwest Petroleum University, Chengdu, 610500, China;2. Department of Chemical and Materials Engineering, University of Alberta, Edmonton T6G 2G6, Canada;1. ENEA - Energy Technologies and Renewable Sources Department (TERIN), ICT Division, Portici Research Center, Piazzale Enrico Fermi 1, Portici 80055, Italy;2. Istituto di Scienze e Tecnologie per l’Energia e la Mobilità Sostenibili - CNR, Viale Marconi 4, 80125 Napoli, Italy;1. Department of Chemical Engineering, Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka-shi, Fukuoka, 819-0395, Japan;2. Department of Materials and Life Science, Faculty of Science and Technology, Seikei University, 3-3-1 Kichijoji-kitamachi, Musashino-shi, Tokyo, 180-8633, Japan;3. Research Center for Synchrotron Light Applications, Kyushu University, 6-1 Kasuga-koen, Kasuga-shi, Fukuoka, 816-8580, Japan |
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| Abstract: | Platinum-based alloy materials as effective cocatalysts in improving the performance of photocatalytic H2 production have raised great interest. Herein, a facile strategy of chemical reduction is established to synthesize bimetallic PtNi nanoparticles on 2D g-C3N4 nanosheets with excellent photocatalytic activity. The addition of PtNi nanoparticles can provide new H+ reduction sites and increase more active sites of the material. The synergistic effect between PtNi alloy nanoparticles and 2D g-C3N4 nanosheets can regulate electronic structure, narrow the band, accelerate charge transfer efficiency and inhabit the recombination of photo-induced electron (e?) and hole pairs (h+), contributing to the improvement of hydrogen evolution activity. The optimal hydrogen evolution rate of Pt0.6Ni0.4/CN shows higher hydrogen evolution rate (9528 μmol·g?1·h?1), which is 13.1 times than that of pure g-C3N4 nanosheets. Besides, a possible mechanism of photocatalytic hydrogen generation has been brought up according to a series of physical and chemical characterization. This work also provides a potential idea of developing cocatalysts integrating metal alloys with 2D g-C3N4 nanosheets for promoting photocatalytic hydrogen evolution. |
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| Keywords: | PtNi alloys Co-catalyst Photocatalytic hydrogen production |
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