Amorphous CoFeP/NC hybrids as highly efficient electrocatalysts for water oxidation |
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| Affiliation: | 1. Shanxi Key Laboratory of Gas Energy Efficient and Clean Utilization, Research Institute of Special Chemicals, Taiyuan University of Technology, Taiyuan, Shanxi, 030024, PR China;2. Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), College of Chemistry, Nankai University, Tianjin, 300071, China;1. Research Institute of Special Chemicals, Taiyuan University of Technology, Taiyuan 030024, Shanxi, PR China;2. Shanxi Key Laboratory of Gas Energy Efficient and Clean Utilization, Taiyuan 030024, Shanxi, PR China;3. Shanxi Provincial Institute of Chemical Industry Co. Ltd., Jinzhong 030600, Shanxi, PR China;1. Scientific-Practical Materials Research Centre of NAS of Belarus, P. Brovki str 19, 220072, Minsk, Belarus;2. South Ural State University, Lenin Av 76, 454080, Chelyabinsk, Russia;3. National University of Science and Technology MISiS, Leninsky Av 4, 119049, Moscow, Russia;4. The Institute of Nuclear Physics, Almaty, 050032, Kazakhstan;5. L.N. Gumilyov Eurasian National University, Nur-Sultan, 010008, Kazakhstan;6. Ural Federal University Named After the First President of Russia B.N. Yeltsin, 620075, Yekaterinburg, Russia;7. Institute of Physics, Mathematics & IT, Immanuel Kant Baltic Federal University, A. Nevskogo str 14, 236041, Kaliningrad, Russia;1. Research Institute of Special Chemicals, Taiyuan University of Technology, Taiyuan, 030024, Shanxi, China;2. Shanxi Key Laboratory of Gas Energy Efficient and Clean Utilization, Taiyuan, 030024, Shanxi, China;1. Shanxi Key Laboratory of Gas Energy Efficient and Clean Utilization, Research Institute of Special Chemicals, Taiyuan University of Technology, Taiyuan, Shanxi 030024, PR China;2. Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), College of Chemistry, Nankai University, Tianjin 300071, China;1. State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029, China;2. Beijing Spacecrafts, China Academy of Space Technology, Beijing, 100094, China |
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| Abstract: | The rational design and regulate structure and composition are pivotal for the development of highly efficient oxygen evolution reaction (OER) catalysts for water splitting. In this study, amorphous CoFeP/NC hybrid electrocatalyst has been synthesized by a simple and effective phosphorization of a CoFe-based coordination polymer under N2 atmosphere. The synergistic effects between the CoFeP and N-doped carbon has led to high electronic conductivity attributed to the optimal Fe contents with N-doped carbon and enlarged electrocatalytic active surface area aroused by the nanostructure of CoFeP/NC, as well as the surface structural evolution of oxyhydroxide/phosphate during OER process. The resulting Co0.35Fe0.17P0.48/NC electrocatalyst can attain a current density of 10 mA/cm2 at an overpotential of 275 mV with a Tafel slope of 31 mV/dec on glassy carbon electrode and 228 mV on Ni foam electrode in 1 M KOH solution, long-term OER stability of this Co0.35Fe0.17P0.48/NC under the applied potential of 1.53 V vs. RHE demonstrates no obvious decline in current densities of 110 mA/cm2 within 17 h, which outperforms those of the contrast electrocatalysts in this work and also comparable to that of many of the reported electrocatalysts in the literatures. This Co0.35Fe0.17P0.48/NC electrocatalyst highlights the rational modulation of optimal composition and electronic structure with homogeneous incorporation of the foreign metal-doped and N-doped carbon for the synthesis of highly efficient electrocatalysts toward to the water oxidation reactions. |
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| Keywords: | N-doped carbon Phosphate Hybrids Electrocatalyst Oxygen evolution reaction |
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