CuCo2S4 integrated multiwalled carbon nanotube as high-performance electrocatalyst for electroreduction of nitrogen to ammonia |
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| Affiliation: | 1. Chemistry Institute for Synthesis and Green Application, School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, 315211, China;2. College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, 325000, China;1. School of Automotive Studies, Tongji University, Shanghai 201804, China;2. School of Materials Science and Engineering, Jiangsu University of Science and Technology, Jiangsu, Zhenjiang 212003, China;1. State Key Laboratory of Digital Manufacturing Equipment and Technology, Huazhong University of Science and Technology, Wuhan 430074, China;2. Department of Mechanical Engineering, University of California, Berkeley, CA 94720, USA;3. Berkeley Sensor and Actuator, Berkeley, CA 94720, USA;1. College of Chemistry, Fuzhou University, Fuzhou 350108, China;2. CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Haixi Institutes, Chinese Academy of Sciences (CAS), Fuzhou 350002, China |
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| Abstract: | Ammonia synthesis based on electrocatalytic nitrogen reduction reaction (NRR) by using renewable sources of energy under ambient conditions has attracted wide research attentions. Herein, we report that the noble-metal-free CuCo2S4/multiwalled carbon nanotube nanocomposite, which is synthesized via a facile one-step hydrothermal and sulfuration approach, can work as the high active and durable catalyst for electrocatalytic NRR. This nanocomposite achieves a high NH3 yield of 137.5 μg h−1 mgcat−1 and a high Faradaic efficiency of 8.7% at −0.5 V vs reversible hydrogen electrode (RHE) in 0.1 M Na2SO4 solution, which outperforms CuCo2S4 counterpart and most reported NRR catalysts. These results reveal that the MWCNT in nanocomposite not only suppresses the aggregation of CuCo2S4 nanoparticles and maximizes the exposure of active sites, but also contributes to the synergistic effect between CuCo2S4 nanoparticles and MWCNT, and facilitates the interfacial reaction kinetics. |
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| Keywords: | Bimetallic sulfides Multiwalled carbon nanotube Hybrid cathode Nitrogen fixation Synergistic effect |
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