Synergistic effect of Yttrium and pyridine-functionalized carbon nanotube on platinum nanoparticles toward the oxygen reduction reaction in acid medium
| Autor: | Maria K. Daletou, Nicolas Alonso-Vante, Yun Luo, Luis Alberto Estudillo-Wong, Nivedita Shroti |
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| Přispěvatelé: | Foundation for Research and Technology Hellas - Institute of Chemical Engineering and High Temperature Chemical Processes, Institut de Chimie des Milieux et Matériaux de Poitiers (IC2MP), Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Poitiers-Institut de Chimie du CNRS (INC) |
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Inorganic chemistry
chemistry.chemical_element 02 engineering and technology Carbon black Carbon nanotube [CHIM.CATA]Chemical Sciences/Catalysis 010402 general chemistry 021001 nanoscience & nanotechnology Platinum nanoparticles Electrochemistry 01 natural sciences Catalysis 0104 chemical sciences law.invention chemistry.chemical_compound chemistry X-ray photoelectron spectroscopy law Pyridine Physical and Theoretical Chemistry 0210 nano-technology Platinum ComputingMilieux_MISCELLANEOUS |
| Zdroj: | Chinese Journal of Catalysis Chinese Journal of Catalysis, Elsevier, 2016, 344, pp.712-721. ⟨10.1016/j.jcat.2016.09.014⟩ |
| ISSN: | 1872-2067 |
| DOI: | 10.1016/j.jcat.2016.09.014⟩ |
| Popis: | Platinum, and platinum containing Yttrium (Y) species nanoparticles (NPs) supported by carbon black, Vulcan XC-72, oxidized multi-walled carbon nanotube, ox.MWCNT, pyridine functionalized multi-walled carbon nanotube, (ox.MWCNT)-Py, were prepared via carbonyl chemical route, followed by heat-treatment. X-ray diffraction (XRD) analyses showed, beside Pt fcc-phase, the presence of PtxY alloy in Pt-Y nanoobjects supported onto functionalized MWCNTs. X-ray photoelectron spectroscopy (XPS) revealed, essentially, that Pt surface was decorated by Y2O3; therefore, such nanoobjects were labeled Pt-Y. By analyzing the surface atomic ratio of Pt/N and Pt/Y in Pt-Y/(ox.MWCNT)-Py, it is suggested that Pt atoms interact with Y2O3, pyridine group, and Y nano-alloying Pt. The transmission electron microscopy (TEM) shows similar mean particle size values, in Pt-Y/Vulcan, Pt-Y/ox.MWCNT and Pt-Y/(ox.MWCNT)-Py, in opposition to Pt NPs supported onto Vulcan, ox.MWCNT and (ox.MWCNT). The surface electrochemistry demonstrated a unique behavior of Pt on Pt-Y/(ox.MWCNT)-Py with respect to other samples. The ORR kinetics of this catalyst was the highest among all the samples, revealing a synergistic effect of Y2O3, pyridine functionalization, and nano-alloyed Y alloyed on Pt toward ORR. |
| Databáze: | OpenAIRE |
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