Effect of X zeolite-carbon composite ratio as support of Pt nanoparticles for MOR and ORR
| Autor: | A. Medina-Ramírez, I. R. Galindo Esquivel, G. García Ruiz, P. J. Pérez-Díaz, B. Ruiz-Camacho |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
General Chemical Engineering General Engineering General Physics and Astronomy 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences 0104 chemical sciences Catalysis Metal chemistry.chemical_compound chemistry Physisorption X-ray photoelectron spectroscopy visual_art visual_art.visual_art_medium General Materials Science Methanol Particle size 0210 nano-technology Zeolite Nuclear chemistry |
| Zdroj: | Ionics. 27:1813-1828 |
| ISSN: | 1862-0760 0947-7047 |
| Popis: | X zeolite-carbon composites as Pt supports with different mass ratios of 3:1 (S1), 1:1 (S2), and 1:3 (S3) were synthesized by sol-gel method. The catalytic performance of Pt/composites for MOR and ORR was investigated and compared to Pt/X zeolite and Pt/C. Pt nanoparticles were prepared by ultrasound method via chemical reduction of Pt precursor with alcohol. The materials synthesized were characterized by XRD, nitrogen physisorption, TEM, SEM-EDS, and XPS. The structural, acidic, and textural properties of different supports demonstrated an effect on the Pt particle size, metal dispersion, Pt load, and Pt-support interaction. Pt/composites showed higher specific activity for MOR compared to Pt/C. Pt/S3 exhibited lower onset potentials, better stability, and an increment in the specific activity for MOR, which is 2.7, 2.0, and 2.9 higher than Pt/S1, Pt/S2, and Pt/C, respectively. For ORR, Pt/composite and Pt/C catalysts synthesized presented more tolerance to methanol than commercial Pt/C. |
| Databáze: | OpenAIRE |
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