Ni2P(O)–Fe2P(O)/CeOx as high effective bifunctional catalyst for overall water splitting |
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| Affiliation: | 1. College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao, 266042, PR China;2. Key Laboratory of Fuel Cell Technology of Guangdong Province, South China University of Technology, Guangzhou, 510640, PR China;3. Department of Physics, Hamline University, St. Paul, 55104, USA |
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| Abstract: | The development of cost-effective bifunctional catalysts with excellent performance and good stability is of great significance for overall water splitting. In this work, NiFe layered double hydroxides (LDHs) nanosheets are prepared on nickel foam by hydrothermal method, and then Ni2P(O)–Fe2P(O)/CeOx nanosheets are in situ synthesized by electrodeposition and phosphating on NiFe LDHs. The obtained self-supporting Ni2P(O)–Fe2P(O)/CeOx exhibit excellent catalytic performances in alkaline solution due to more active sites and fast electron transport. When the current density is 10 mA cm?2, the overpotential of hydrogen evolution reaction and oxygen evolution reaction are 75 mV and 268 mV, respectively. In addition, driven by two Ni2P(O)–Fe2P(O)/CeOx electrodes, the alkaline battery can reach 1.45 V at 10 mA cm?2. |
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| Keywords: | Electrochemical water splitting Hydrogen evolution reaction Oxygen evolution reaction NiFe LDHs |
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