High CO tolerance of Pt nanoparticles synthesized by sodium borohydride in a time-domain NMR spectrometer
| Autor: | L.C. de Queiroz, Andrezza S. Ramos, R. F. B. de Souza, Monique C.L. Santos, Walter Ricardo Brito, M.B. Machado, J. Nandenha, C.M. Godoi, E.H. Fontes, Almir Oliveira Neto |
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| Rok vydání: | 2020 |
| Předmět: |
chemistry.chemical_classification
Materials science Renewable Energy Sustainability and the Environment Reducing agent Inorganic chemistry Energy Engineering and Power Technology chemistry.chemical_element Nanoparticle 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences NMR spectra database Sodium borohydride chemistry.chemical_compound Fuel Technology chemistry Compounds of carbon Cyclic voltammetry 0210 nano-technology Platinum Carbon monoxide |
| Zdroj: | International Journal of Hydrogen Energy. 45:22973-22978 |
| ISSN: | 0360-3199 |
| DOI: | 10.1016/j.ijhydene.2020.06.105 |
| Popis: | The CO poisoning effect was overcome using a novel synthesis method. This method consists of using sodium borohydride reducing agent assisted by magnetic field and radiofrequency pulses in the time-domain NMR spectrometer. This synthesis was useful to disperse the Pt nanoparticles over the carbon support and to compress the lattice strain of the Pt crystalline structure. Besides that, Pt/C MFP90° showed a multi-CO oxidation component in cyclic voltammetry, and this can avoid the poisoning effect by creating a large availability of CO species to be adsorbed, desorbed, and re-adsorbed. Pt/C MFP90° has also shown the best performance in the PEMFC regarding H2 and CO + H2 experiments. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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