Nanofiber-based Sm0.5Sr0.5Co0.2Fe0.8O3-δ/N-MWCNT composites as an efficient bifunctional electrocatalyst towards OER/ORR |
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| Affiliation: | 1. Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University, Shanghai, 200240, PR China;2. Aerospace System Engineering Shanghai, Shanghai, 201108, PR China;3. PetroChina Southwest Oil& Gasfield Company, Chengdu, Sichuan, 610051, PR China;4. Shanghai Jiao Tong University Sichuan Research Institute, Chengdu, Sichuan, 610213, PR China;1. State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China;2. Kunshan Loujiang Experimental School, Suzhou, Jiangsu 215300, China;1. Department of Chemical Engineering, Birla Institute of Technology and Science (BITS) Pilani, Rajasthan-333031, India;2. Centre for Nano Science and Engineering, Indian Institute of Science(IISC), Bengaluru, Karnataka 560012, India;3. Department of Chemical Engineering, New Mexico Institute of Technology, Socorro, NM 87801, USA;1. School of Chemistry and Chemical Engineering, Lanzhou Jiaotong University, Lanzhou, 730070, China;2. Key Laboratory of Eco-functional Polymer Materials of the Ministry of Education, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, 730070, China;3. Center for Green Innovation, School of Mathematics and Physics, University of Science and Technology Beijing, Beijing, 100083, China;1. State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, PR China;2. School of Energy Industry, Shanxi College of Technology, Shuozhou 036000, PR China;3. Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, PR China |
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| Abstract: | It is of significance to search non-noble metal OER/ORR catalysts with perfect performance. The introduction of carbon into perovskite can significantly enhance oxygen electrocatalytic activity. Herein, nanofiber-based Sm0.5Sr0.5Co0.2Fe0.8O3-δ/rGO (SSCF28/rGO) and Sm0.5Sr0.5Co0.2Fe0.8O3-δ/N-MWCNT (SSCF28/N-MWCNT) hybrids with various mass ratios were synthesized successfully by a facile ultrasonic mixing method and their oxygen evolution reaction (OER)/oxygen reduction reaction (ORR) properties were compared and studied. In 0.1 M KOH, SSCF28/N-MWCNT = 1.3 with optimal mass ratio shows better OER/OER bifuntional catalytic activity than SSCF28/rGO = 2:1. After 1000 CV cycles, SSCF28/N-MWCNT = 1.3 remains stable. Compared to SSCF28/rGO = 2:1, SSCF28/N-MWCNT = 1:3 shows promising practical applicability in metal-air batteries. The excellent OER/ORR activity of SSCF28/N-MWCNT = 1:3 can be attributed to the component optimization of perovskite and carbon and the synergistic effect between nanofiber-structured SSCF28 and N-functionalized MWCNT (N-MWCNT). |
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| Keywords: | Electrocatalyst Oxygen evolution reaction Oxygen reduction reaction |
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