Hollow Pt skim-sandwiched Cu spheres supported on reduced graphene oxide-carbon nanotube architecture for efficient methanol electrooxidation |
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| Affiliation: | 1. College of Materials Science and Engineering, Hunan University, Changsha 410082, PR China;2. State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, PR China;3. College of Finance and Statistics, Hunan University, Changsha 410082, PR China;1. Electrochemical Systems Laboratory, SRM Research Institute, SRM Institute of Science and Technology, Kattankulathur, 603203, India;2. Department of Chemistry, SRM Institute of Science and Technology, Kattankulathur, 603203, India;1. School of Environment and Energy, South China University of Technology, Guangzhou, 510006, PR China;2. Key Laboratory of Subsurface Hydrology and Ecology in Arid Areas, Ministry of Education, Chang''an University, Xi''an 710054, PR China;3. UCD Dooge Centre for Water Resources Research, School of Civil Engineering, University College Dublin, Belfield, Dublin 4, Ireland;4. The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, South China University of Technology, Guangzhou, Guangdong 510006, PR China |
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| Abstract: | The disadvantages of high cost, easy poisoning and insufficient durability hinder platinum (Pt) application in direct methanol fuel cells. In this study, a hybrid of reduced graphene oxide/carbon nanotubes-supported hollow copper spheres (Cu/rGO@CNTs) is prepared by a one-step electrodeposition method. Then, the internal and external surfaces of hollow Cu spheres are coated with Pt skims to obtain a hollow bimetallic electrocatalyst (Pt/Cu/rGO@CNTs) through a simple galvanic replacement reaction by immersing Cu/rGO@CNTs in a chloroplatinic acid (H2PtCl6) solution. The three dimensional rGO@CNTs network structure benefit mass transport and electron transfer. Pt skims expose abundant active sites for electrocatalytic methanol oxidation reactions (MORs). Cu cores synergize Pt skims to enhance anti-poison ability. As a result, Pt/Cu/rGO@CNTs shows an excellent electrocatalytic activity for MORs with a robust tolerance of catalyst poisoning. |
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| Keywords: | Carbon nanotubes Reduced graphene oxide Electrodeposition Methanol electrooxidation |
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