Engineering bimetallic PtX (X=Sn,Cu) immobilized on graphene as efficient catalysts: Boosted charge migration and hydrogen evolution |
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| Affiliation: | 1. Chemical Engineering Program, Texas A and M University at Qatar, P.O. Box 23874, Doha, Qatar;2. Artie McFerrin Department of Chemical Engineering, Texas A and M University, MS 3122, College Station, TX, 77843-3122, United States;3. Catalysis Institute and c*change (DST-NRF Centre for Excellence in Catalysis), Department of Chemical Engineering, University of Cape Town, Cape Town, South Africa;4. Department of Chemical Engineering, Aristotle University of Thessaloniki, University Campus, 54124, Thessaloniki, Greece;5. Chemical Process & Energy Resources Institute (CPERI), Centre for Research and Technology Hellas (CERTH), 6th km Charilaou - Thermi Road, P.O. Box 361, 57001, Thessaloniki, Greece;1. Key Laboratory of Magnetic Molecules & Magnetic Information Materials Ministry of Education, Shanxi Normal University, Linfen, 041004, China;2. The School of Chemical and Material Science, Shanxi Normal University, No. 1, Gongyuan Street, Linfen, 041004, China;1. Bioengineering Department, Faculty of Engineering, Ege University, 35100, Izmir, Turkey;2. Chemical Engineering Laboratory, Faculty of Sciences and Centre for Advanced Scientific Research (CICA), University of La Coruña, Rúa da Fraga 10, E–15008, A Coruña, Spain;3. Biology Department, Faculty of Science, Ege University, 35100, Izmir, Turkey;4. Application and Research Center for Testing and Analysis, Ege University, 35100, Izmir, Turkey;1. Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Changzhou University, Changzhou 213164, China;2. Jiangsu Key Laboratory of Materials Surface Science and Technology, Changzhou University, Changzhou 213164, China;1. División de Ciencias Ambientales, Instituto Potosino de Investigación Científica y Tecnológica A.C., Camino a la Presa San José No. 2055, Col. Lomas 4a Sección, C.P. 78216, San Luis Potosí, SLP, Mexico;2. Facultad de Ciencias Químicas, Universidad Autónoma de San Luis Potosí, Av. Dr. Manuel Nava No. 6, Zona Universitaria, C.P. 78210, San Luis Potosí, SLP, Mexico |
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| Abstract: | In this work, bimetallic PtX (X = Sn, Cu) decorated graphene nanohybrids (PtX/G) were developed, which showed enhanced photocatalytic hydrogen evolution performance than that of Pt/G in Eosin Y sensitized H2 production system. The presence of Sn or Cu in PtX/G nanohybrids can remarkably improve the photogenerated charge separation efficiency and contribute to promoting the reduction of protons to molecular hydrogen in comparison to with noble metal Pt. Meanwhile, graphene acted as a more suitable electronic support to accelerate the migration of electrons from sensitizer to catalysts, owing to its higher electron mobility and larger surface area than other supports (such as carbon sphere, Al2O3 and SiO2). The optimal H2 evolution rate PtSn/G and PtCu/G was about 2.2 and 2.0 times higher than that of Pt/G. The apparent quantum efficiency (AQE) of PtSn/G and PtCu/G reached up to 12.46% and 11.06% under visible light irradiation (λ ≥ 420 nm), respectively. |
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| Keywords: | PtSn/G PtCu/G Eosin Y Visible light irradiation |
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