Microwave synthesis of MWCNT-supported PtRuNi catalysts and their electrocatalytic activity for direct methanol fuel cells
| Autor: | Seokhee Lee, Young Wook Lee, Hyeong Kyu Cho, Jungwon Kim, Sung Pil Woo |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
chemistry.chemical_element Nanoparticle 02 engineering and technology Chronoamperometry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Catalysis Dielectric spectroscopy Nickel chemistry.chemical_compound chemistry Chemical engineering Ceramics and Composites Methanol Cyclic voltammetry 0210 nano-technology Methanol fuel |
| Zdroj: | Journal of the Korean Ceramic Society. 57:192-199 |
| ISSN: | 2234-0491 1229-7801 |
| DOI: | 10.1007/s43207-020-00016-1 |
| Popis: | Multi-walled carbon nanotube (MWCNT)-supported PtRuNi catalysts were synthesized using a microwave heating process. The particle sizes and structures of the catalysts were analyzed using X-ray diffraction and transmission electron microscopy (TEM). The electrocatalytic activities of the catalysts for methanol electrooxidation were evaluated by cyclic voltammetry, chronoamperometry, and impedance spectroscopy. The TEM results revealed that the MWCNT-supported PtRuNi catalyst synthesized via microwave heating for 10 min showed a uniform distribution of nanoparticles with an average size of about 5 nm. The catalyst showed an electrochemically active surface area of 62.2 m2 g−1 and a mass activity of 148.64 mA gpt−1. A decrease in the microwave heating time increased the dispersion and reduced the size of the PtRuNi nanoparticles. Moreover, the improved performance of the catalysts can be attributed to their high proton and electronic conductivity due to nickel hydroxides. Nickel hydroxides produced on the surface of metallic Ni in the Pt lattice contribute to the catalytic activity of PtNi catalysts in direct methanol fuel cells. |
| Databáze: | OpenAIRE |
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