Quick-to-synthesize hybrid electrodes composed of activated carbon cloth with Co/Fe-based films as bifunctional electrocatalysts for water splitting |
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| Affiliation: | 1. Department of Mechanical Engineering, GMR Institute of Technology, Rajam, A.P., India;2. Department of Mechanical Engineering, Centurion University of Technology and Management, Odisha, India;3. Department of Mechanical Engineering, National Institute of Technology, Jamshedpur, Jharkhand, India;1. State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum, Huadong, Qingdao, 266580, China;2. Institute for Advanced Study, Shenzhen University, Shenzhen, 518060, China;1. Institute of Energy and Power Engineering, Zhejiang University of Technology, Hangzhou 310027, China;2. Zhejiang Carbon Neutral Innovation Institute, Hangzhou 310000, China;3. Interdiscipilinary Research Center for Refining & Advanced Chemicals, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia;4. Faculty of Science and Engineering, Kasetsart University Chalermphrakiat Sakon Nakhon Province Campus, Sakon Nakhon 47000, Thailand;5. Center of Excellence in Environmental Catalysis and Adsorption, Faculty of Engineering, Thammasat University, Pathumthani 12120, Thailand;1. Graduate School of Science and Engineering, Kansai University, 3-3-35 Yamate-cho, Suita, Osaka 564-8680 Japan;2. Faculty of Environmental and Urban Engineering, Kansai University, 3-3-35 Yamate-cho, Suita, Osaka 564-8680 Japan;1. State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, PR China;2. Research Institute of Petroleum Prcessing, SINOPEC, Beijing 100083, PR China;1. North University of China, School of Materials Science and Engineering, Taiyuan, 030051, Shanxi, China;2. Xinzhou Teachers University, Department of Chemistry, Xinzhou, 034000, Shanxi, China;3. Shanxi College of Technology, School of Materials Industry, Shuozhou, 036000, Shanxi, China |
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| Abstract: | Hybrid electrodes have recently been investigated as attractive alternatives to noble-metal-based electrocatalysts for hydrogen production by water splitting. Herein, we propose an electrode composed of an oxidized carbon cloth with an electrodeposited bimetallic Co/Fe-based film. By optimizing the electrodeposition conditions and applying electrochemically activated carbon cloth as a substrate, one can prepare a free-standing noble-metal-free electrocatalytic electrode with high bifunctional electrocatalytic activity in hydrogen and oxygen evolution from alkaline solution. The developed Fe0.25Co0.75 electrode requires overpotentials of 245 mV for HER and 360 mV for OER at high current densities of ?100 and 100 mA cm?2, respectively. Furthermore, its overall synthesis time from commercially available raw materials is only approximately 20 min. The electrode material was used as both a cathode and an anode in the model electrolyzer, which can deliver 10 mA cm?2 of current density at 1.66 V without loss of activity during 100 h of performance. |
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| Keywords: | Alkaline water electrolysis Hydrogen evolution reaction Oxygen evolution reaction Electrodeposition Iron Cobalt |
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