Nickel foam-supported Fe,Ni-Polyporphyrin microparticles: Efficient bifunctional catalysts for overall water splitting in alkaline media |
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| Affiliation: | 1. School of Chemistry and Environmental Engineering, Changchun University of Science and Technology, 7089 Weixing Road, Changchun, 130022, PR China;2. School of Materials Science and Engineering & Electron Microscopy Center, Jilin University, 2699 Qianjin Street, Changchun, 130012, PR China;3. Department of Chemistry and Chemical Biology & Department of Chemical and Biochemical Engineering, Rutgers, The State University of New Jersey, 610 Taylor Road, Piscataway, NJ, 08854, USA;1. College of Chemistry and Environmental Science, Inner Mongolia Key Laboratory of Green Catalysis, Inner Mongolia Collaborative Innovation Center for Water Environment Safety, Inner Mongolia Normal University, Hohhot, 010022, China;2. CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, PR China;1. Guangxi Key Laboratory of Electrochemical Energy Materials, Collaborative Innovation Center of Sustainable Energy Materials, State Key Laboratory of Processing for Non-ferrous Metal and Featured Materials, Guangxi University, 100 Daxue Road, Nanning, China;2. School of Computer, Electronics and Information, Guangxi University, No. 100 Daxue Road, Nanning, China;1. College of Chemistry and Chemical Engineering, Guangxi Key Laboratory of Electrochemical Energy Materials, State Key Laboratory of Processing for Non-Ferrous Metal and Featured Materials, Guangxi University, Nanning, 530004, China;2. Laboratory of Alternative Energy Conversion Systems, Department of Mechanical Engineering, School of Engineering, University of Thessaly, Pedion Areos, 38834, Greece;3. Laboratory of Materials and Devices for Clean Energy, Ural Federal University, 19 Mira Street, Yekaterinburg, 620002, Russia;4. Laboratory of Electrochemical Devices Based on Solid Oxide Proton Electrolytes, Institute of High Temperature Electrochemistry, RAS, Yekaterinburg, 620990, Russia;1. Department of Chemistry, University of the Western Cape, 7535 Cape Town, South Africa;2. Collaborative Innovation Center of Sustainable Energy Materials, Guangxi Key Laboratory of Electrochemical Energy Materials, State Key Laboratory of Processing for Non-Ferrous Metal and Featured Materials, Guangxi University, Nanning 530004, China;3. Department of Chemistry, College of Science, University of Basrah, Basrah, Iraq;4. Laboratory of Electrochemical Devices Based on Solid Oxide Proton Electrolytes, Institute of High Temperature Electrochemistry (RAS), Yekaterinburg 620990, Russia;5. Laboratory of Materials and Devices for Clean Energy, Ural Federal University, 19 Mira Str., Yekaterinburg 620002, Russia;6. Laboratory of Alternative Energy Conversion Systems, Department of Mechanical Engineering, School of Engineering, University of Thessaly, Pedion Areos, Volos 383 34, Greece;1. Collaborative Innovation Center of Sustainable Energy Materials, Guangxi Key Laboratory of Electrochemical Energy Materials, State Key Laboratory of Processing for Non-Ferrous Metal & Featured Materials, Key Laboratory of Disaster Prevention and Structural Safety of China Ministry of Education, Guangxi University, Nanning, 530004, China;2. School of Information and Control Engineering, China University of Mining and Technology, Xuzhou, 221116, Jiangsu, China;3. Department of Chemistry, University of the Western Cape, 7535, Cape Town, South Africa;4. Laboratory of Electrochemical Devices Based on Solid Oxide Proton Electrolytes, Institute of High Temperature Electrochemistry, RAS, Yekaterinburg, 620990, Russia;5. Laboratory of Materials and Devices for Clean Energy, Ural Federal University, 19 Mira Street, Yekaterinburg, 620002, Russia;6. Laboratory of Alternative Energy Conversion Systems, Department of Mechanical Engineering, School of Engineering, University of Thessaly, Pedion Areos, 38834, Greece |
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| Abstract: | Developing highly active, stable and sustainable electrocatalysts for overall water splitting is of great importance to generate renewable H2 for fuel cells. Herein, we report the synthesis of electrocatalytically active, nickel foam-supported, spherical core-shell Fe-poly(tetraphenylporphyrin)/Ni-poly(tetraphenylporphyrin) microparticles (FeTPP@NiTPP/NF). We also show that FeTPP@NiTPP/NF exhibits efficient bifunctional electrocatalytic properties toward both the oxygen evolution reaction (OER) and the hydrogen evolution reaction (HER). Electrochemical tests in KOH solution (1 M) reveal that FeTPP@NiTPP/NF electrocatalyzes the OER with 100 mA cm?2 at an overpotential of 302 mV and the HER with 10 mA cm?2 at an overpotential of 170 mV. Notably also, its catalytic performance for OER is better than that of RuO2, the benchmark OER catalyst. Although its catalytic activity for HER is slightly lower than that of Pt/C (the benchmark HER electrocatalyst), it shows greater stability than the latter during the reaction. The material also exhibits electrocatalytic activity for overall water splitting reaction at a current density of 10 mA cm?2 with a cell voltage of 1.58 V, along with a good recovery property. Additionally, the work demonstrates a new synthetic strategy to an efficient, noble metal-free-coordinated covalent organic framework (COF)-based, bifunctional electrocatalyst for water splitting. |
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| Keywords: | Poly(tetraphenylporphyrin) OER HER Overall water splitting Electrocatalysis |
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