ZIF-67-derived nickel–cobalt phosphide nanocubes/N-doped carbon/nickel form composite for efficient overall water splitting |
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| Affiliation: | 1. Chongqing Key Laboratory for Advanced Materials and Technologies of Clean Energy, School for Materials and Energy, Southwest University, Chongqing 400715, China;2. Key Laboratory of Extraordinary Bond Engineering and Advanced Materials Technology of Chongqing, School of Electronic Information Engineering, Yangtze Normal University, Chongqing 408100, China;1. Department of Mechanical Engineering, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1, 1049-001 Lisbon, Portugal;2. MARETEC/DEM - Marine, Environment and Technology Centre, LARSyS, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1, 1049-001 Lisbon, Portugal;3. Center IN+, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1, 1049-001 Lisbon, Portugal;1. Federal Scientific Agroengineering Center VIM, 1st Institutsky Proezd, 5, 109428, Moscow, Russia;2. Russian University of Transport, 127994, Moscow, Russia;1. School of Energy and Power Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu, China;2. Vehicle Measurement, Control and Safety Key Laboratory of Sichuan Province, School of Automobile and Transportation, Xihua University, Chengdu 610039, China;1. Department of Physics, Isfahan University of Technology, Isfahan, 84156-83111, Iran;2. Nanobiosensors and Bioanalytical Applications Group (NanoB2A), Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC, BIST, and CIBER-BBN, Bellaterra, 08193, Barcelona, Spain |
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| Abstract: | Hydrogen production from electrochemical water splitting is a promising strategy to generating green energy, which requires development of efficient and stable bifunctional catalysts for hydrogen and oxygen evolution reaction (HER/OER). Herein, dual transition metal phosphides/N-doped carbon/Nickel foam composite (CoNiP/NC-NF) is prepared via direct phosphidation of ZIF-67, in which ZIF-67 can control the size and N-doping content of CoNiP/NC, boosting the bifunctional activities for the OER and HER. Then, the overall water splitting is performed by using CoNiP/NC-NF as the cathode and anode, showing a low cell voltage of 1.60 V to reach current density of 10 mA cm?2. Experimental studies indicate that ZIF-67 influences the electrocatalytic performance, and theoretical studies identify the active component of CoNiP/NC-NF for HER and OER, respectively. |
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| Keywords: | ZIF-67 Transition metal phosphide Overall water splitting Hydrogen evolution reaction Oxygen evolution reaction |
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