One-Step Synthesis of NiFe Layered Double Hydroxide Nanosheet Array/N-Doped Graphite Foam Electrodes for Oxygen Evolution Reactions |
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Authors: | Rui Li Jingsong Xu Dr Qifa Pan Jingwen Ba Prof?Dr Tao Tang Prof?Dr Wenhua Luo |
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Institution: | 1. Insitute of Materials, China Academy of Engineering Physics, Jiangyou, 621907 China;2. Science and Technology on Surface Physics and Chemistry Laboratory, Jiangyou, 621908 China |
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Abstract: | Developing cost-effective and highly efficient oxygen evolution reaction (OER) electrocatalysts is vital for the production of clean hydrogen by electrocatalytic water splitting. Here, three dimensional nickel-iron layered double hydroxide (NiFe LDH) nanosheet arrays are in-situ fabricated on self-supporting nitrogen doped graphited foam (NGF) via a one-step hydrothermal process under an optimized amount of urea. The as prepared NiFe LDH/NGF electrode exhibits a remarkable activity toward OER with a low onset overpotential of 233 mV and a Tafel slope of 59.4 mV dec?1 as well as a long-term durability. Such good performance is attributed to the synergy among the doping effect, the binder-free characteristic, and the architecture of the nanosheet array. |
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Keywords: | hydrothermal synthesis oxygen evolution reactions nanosheet arrays doped graphite foam water splitting |
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