One step synthesis of Fe4.4Ni17.6Se16 coupled NiSe foam as self-supported,highly efficient and durable oxygen evolution electrode |
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| Authors: | Sainan Ma Huiyu Yuan Lejuan Cai Xinyu Wang Hui Long Yang Chai Yuen Hong Tsang |
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| Affiliation: | 1. The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen, People''s Republic of China;2. Department of Applied Physics and Materials Research Center, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong |
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| Abstract: | The development of cost-effective, durable and high-efficient oxygen evolution reaction (OER) electrocatalysts is an extremely critical technology for the large-scale industrial water electrolysis. Here, a new strategy is proposed to significantly enhance the electrocatalytic activity by forming a hybrid electrode of NiSe and Fe4.4Ni17.6Se16 through direct selenization of porous iron-nickel (FeNi) alloy foam via thermal selenization process. The obtained self-supported Fe4.4Ni17.6Se16/NiSe hybrid (FNS/NiSe) foam displays outstanding durability and remarkable catalytic activity in 1.0 M KOH with low overpotentials of 242 and 282 mV to achieve the current densities of 100 and 500 mA cm?2, respectively. To the best of our knowledge, it exceeds most of the reported OER electrocatalysts in alkaline electrolytes. |
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| Keywords: | Electrocatalyst Heterointerfaces Oxygen evolution reaction Thermal selenization |
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