A comparative study on the catalytic activities and stabilities of atomic-layered platinum on dispersed Ti0.9Cu0.1N nanoparticles supported by N-doped carbon nanotubes (N-CNTs) and reduced graphene oxide (N-rGO) |
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| Affiliation: | 1. Key Laboratory of Fuel Cell Technology of Guangdong Province and Key Laboratory of New Energy Technology of Guangdong Universities, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China;2. Energy Centre, Council for Scientific and Industrial Research (CSIR), Meiring Naudé Road, Brummeria, Pretoria 0001, South Africa;1. National Engineering Research Center of Nonferrous Metals Materials and Products for New Energy, GRINM Group Co., Ltd., Beijing, 100088, China;2. GRIMAT Engineering Institute Co., Ltd., Beijing, 101407, China;1. Laboratory of Materials Interaction and Environment (LIME), University of Mohamed Seddik Benyahia, BP. 98, Ouled Aissa, 18000, Jijel, Algeria;2. University of Mohamed Seddik Benyahia, BP. 98, Ouled Aissa, 18000, Jijel, Algeria;3. Laboratory of Storage and Valorization of Renewable Energies, Faculty of Chemistry (USTHB), 16111, Algiers, Algeria;1. Institut Européen des Membranes, IEM – UMR 5635, Univ Montpellier, CNRS, ENSCM, Montpellier, France;2. Institut Charles Gerhardt Montpellier, ICGM – UMR 5253, Univ Montpellier, CNRS, ENSCM, Montpellier, France;1. State Key Laboratory of Metastable Materials Science and Technology, Hebei Key Laboratory of heavy metal deep-remediation in water and resource reuse, College of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, China;2. Advanced Li-ion Battery Engineering Laboratory and Key Laboratory of Graphene Technologies and Applications of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, PR China;1. UNAM–National Nanotechnology Research Center, Bilkent University, Ankara, 06800, Turkey;2. Institute of Materials Science and Nanotechnology, Bilkent University, Ankara, 06800, Turkey;3. NANOTAM - Nanotechnology Research Center, Bilkent University, Ankara, 06800, Turkey;4. Department of Electrical and Electronics Engineering, Bilkent University, Ankara, 06800, Turkey;5. Department of Energy Engineering, Faculty of Engineering, Ankara University, Ankara, 06830, Turkey;6. Department of Chemistry, Bilkent University, Ankara, 06800, Turkey;7. Department of Physics, Bilkent University, Ankara, 06800, Turkey |
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| Abstract: | In our previous research, titanium-based nitride with high conductivity and superior corrosion resistance were developed as an ideal core material for replacing noble metal to form Pt-based core-shell catalysts by pulse electrodeposition. Meanwhile, the smaller sizes of nitride cores would also be available for pulse electrodeposition by dispersing them on carbon nanotubes (CNT). To achieve a better practice on the preparation of the Pt-based core-shell catalysts, in this work, both nitrogen-doped carbon nanotubes (N-CNT) and reduced graphene oxide (N-rGO) were used to support the copper-doped titanium nitride (Ti0.9Cu0.1N) cores. In the course of pulse electrodeposition, their influences as supports on the electronic states of electrodeposited Pt as well as their catalytic activities were compared. The results showed that the Pt preferred to electrodeposit on Ti0.9Cu0.1N cores supported by N-CNT and formed a core-shell structure. While with the same electrodeposition process, the Pt was found to be electrodeposited not only on the Ti0.9Cu0.1N cores supported by N-rGO with heavy aggregations but also on the N-rGO support. Raman spectroscopy analysis indicated that the higher degree of structural defects on N-rGO, as support, might have contributed to such divergence observation. |
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| Keywords: | Core-shell catalysts Pulse electrodeposition Structural defects Cu-doped titanium nitride |
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