Spherical Co/Co9S8 as electrocatalyst for hydrogen production from alkaline solution and alkaline seawater |
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| Affiliation: | 1. Khristianovich Institute of Theoretical and Applied Mechanics of SB RAS, 630090, Novosibirsk-90, Institutskaya Str. 4/1, Russian Federation;2. Voevodsky Institute of Chemical Kinetics and Combustion of SB RAS, 630090, Novosibirsk-90, Institutskaya Str. 3, Russian Federation;3. Novosibirsk State University, Novosibirsk-90, Pirogov Str. 2, 630090, Russian Federation;1. College of Physics and Electromechanical Engineering, Hubei University of Education, Wuhan 430205, PR China;2. Hubei Engineering Research Center for Safety Detection and Control of Hydrogen Energy - Hubei Key Laboratory of Ferro- & Piezo-electric Materials and Devices, School of Microelectronics, Hubei University, Wuhan 430062, PR China;3. School of Chemistry and Environmental Engineering, Wuhan University of Bioengineering, Wuhan 430415, PR China;1. Institute of Advanced Optical Technologies ? Thermophysical Properties (AOT-TP), Department of Chemical and Biological Engineering (CBI) and Erlangen Graduate School in Advanced Optical Technologies (SAOT), Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Paul-Gordan-Straße 8, 91052 Erlangen, Germany;2. Forschungszentrum Jülich GmbH, Helmholtz Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Cauerstraße 1, 91058 Erlangen, Germany;3. Institute of Chemical Reaction Engineering (CRT), Department of Chemical and Biological Engineering (CBI), Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Egerlandstraße 3, 91058 Erlangen, Germany;1. School of Computer Science and Technology, Shandong Technology and Business University, Yantai, 264005, China;2. Department of Mathematics, R. M. K. College of Engineering and Technology, Thiruvallur, Tamilnadu, India;3. Department of Mathematics, Periyar Maniammai Institute of Science & Technology, Thanjavur, Tamilnadu, India;4. School of Science, SVKM''s NMIMS Deemed to be University, Navi Mumbai, 410 210, India;5. Department of Mathematics, Vel Tech Multi Tech Dr. Rangarajan Dr. Sakunthala Engineering College, Aavadi, Thiruvallur, Tamilnadu, India;6. Department of Mathematics, Kalasalingam Academy of Research and Education (Deemed to be University), Krishnankoil, 626126, Srivilliputtur, Tamilnadu, India;7. Department of Mathematics, Dmi St John The Baptist University, 800-Central Africa, Malawi;8. Mathematics Program, Department of Science and Technology, Ranyah University College, Taif University, P.O. Box 11099, Taif, 21944, Saudi Arabia;9. Mechanical Engineering Department, College of Engineering and Islamic Architecture, Umm Al-Qura University, P. O. Box 5555, Makkah, 21955, Saudi Arabia;10. Department of Mechanical Engineering, Lebanese American University, Kraytem, Beirut, 1102-2801, Lebanon;11. Department of Mathematics and Statistics, Riphah International University I-14, Islamabad, 44000, Pakistan;1. Faculty of Chemistry, Adam Mickiewicz University, Uniwersytetu Poznańskiego 8, 61-614 Poznań, Poland;2. Institute of Molecular Physics, Polish Academy of Sciences, Smoluchowskiego 17, 60-179 Poznań, Poland |
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| Abstract: | Cobalt-based sulfide catalysts are considered as potential materials for electrocatalytic hydrogen production from seawater. Here, we have successfully prepared a Co/Co9S8 electrocatalyst with hollow spherical structure. As-prepared material exhibited excellent electrocatalytic activity in hydrogen evolution reaction (HER) in alkaline seawater. The overpotentials for Co/Co9S8 in alkaline seawater were measured as low as 136.2 mV, when reached a current density of 10 mA cm? 2. It also had good stability and could be maintained for 24 h in 1.0 M KOH and alkaline seawater. The results of SEM and TEM confirmed that the catalyst had excellent reaction structure. Due to the hollow structure, Co/Co9S8 showed remarkable catalytic performance for HER. The construction method of Co/Co9S8 hollow structure is an effective strategy to improve the performance of HER for seawater splitting. |
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| Keywords: | Seawater Hydrogen evolution reaction Spherical shell shape Hollow structure Cobalt based sulfides |
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