Phosphorus-doped Fe3O4 nanoflowers grown on 3D porous graphene for robust pH-Universal hydrogen evolution reaction |
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| Affiliation: | 1. Jagiellonian University, Faculty of Chemistry, Department of Physical Chemistry & Electrochemistry, Gronostajowa 2, Krakow, 30387, Poland;2. University of Illinois at Urbana – Champaign, Department of Chemistry, 600 S Mathews Ave., Urbana, IL, 61801, United States;3. Jagiellonian University, Faculty of Chemistry, Department of Chemical Technology, Gronostajowa 2, Krakow, 30387, Poland;4. Jagiellonian University Medical College, Department of Medicinal Chemistry, Medyczna 9, 30688, Krakow, Poland;5. AGH University of Science and Technology, Academic Centre for Materials and Nanotechnology, A. Mickiewicza 30, Krakow, Poland;1. Qingdao Key Laboratory of Functional Membrane Material and Membrane Technology, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, No. 189 Songling Road, 266101, Qingdao, China;2. University of Chinese Academy of Sciences, 100049, Beijing, China;1. Key Laboratory of Rubber-plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber-plastics, Key Laboratory of Sensor Analysis of Tumor Marker (Ministry of Education), College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China;2. College of Science and Technology, Agricultural University of Hebei, Cangzhou 061100, China;1. School of Chemical Engineering, Yeungnam University, Gyeongsan 38541, Republic of Korea;2. Department of Applied Chemistry, Kyungpook National University, Daegu 41566, Republic of Korea;3. School of Electrical and Computer Engineering, Pusan National University, Busan 46241, Republic of Korea;4. Department of Chemistry, Pusan National University, Busan 46241, Republic of Korea |
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| Abstract: | It is extremely necessary to develop highly efficient and low-cost non-noble metal electrocatalysts for hydrogen evolution reaction (HER) under a pH-universal condition in the realm of sustainable energy. Herein, we have successfully prepared phosphorus doped Fe3O4 nanoflowers on three-dimensional porous graphene (denoted as P–Fe3O4@3DG) via a simple hydrothermal and low-temperature phosphating reaction. The P–Fe3O4@3DG hybrid composite not only demonstrates superior performance for HER in 1.0 M KOH with low overpotential (123 mV at 10 mA/cm2), small Tafel slope (65 mV/dec), and outstanding durability exceeding 50 h, but also exhibits satisfying performances under neutral and acidic medium as well. The 3D graphene foam with large porosity, high conductivity, and robust skeleton conduces to more active sites, and faster electron and ion transportation. The phosphorus dopant provides low Gibbs free energy and ability of binging H+. The synergistic effect of 3DG substrate and P–Fe3O4 active material both accelerates the catalytic activity of Fe-based hybrid composite for HER. |
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| Keywords: | 3D graphene Phosphorus-doping Hydrogen evolution reaction pH-universal |
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