Comparison of the Surface State of Ni Nanoparticles Used for Methane Catalytic Decomposition
| Autor: | Caribay Urbina, Edgar Cañizales, Juan C. De Jesus, Ismael González, Blas Delgado |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
Thermogravimetric analysis
Materials science chemistry.chemical_element Nanoparticle Carbon nanotube Surfaces Coatings and Films Electronic Optical and Magnetic Materials Catalysis law.invention Nickel General Energy X-ray photoelectron spectroscopy Chemical engineering chemistry law Reactivity (chemistry) Physical and Theoretical Chemistry Carbon |
| Zdroj: | The Journal of Physical Chemistry C. 116:21577-21587 |
| ISSN: | 1932-7455 1932-7447 |
| Popis: | Nickel nanoparticles were synthesized by two different routes and their reactivity was assessed during methane catalytic decomposition (MCD) conducted in situ in a thermogravimetric analyzer at atmospheric pressure from room temperature to 930 °C. Commercially available nickel nanoparticles were also evaluated for comparative purposes. Carbon buildup was monitored continuously to provide a qualitative comparison of the rate of the reaction for all the systems, while residues composed of nickel nanoparticles and carbon nanotubes (CNTs) were collected at different stages for further evaluation by X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), and transmission electron microscopy (TEM). The surface composition of the fresh nickel nanoparticles was clearly sensitive to the preparation method and was presumably responsible for the trends observed during the catalytic evaluation. On one hand, an early onset in the temperature of the catalytic reaction at 400 °C is distinguished by Ni nanoparti... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|