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Synchrotron-based X-ray absorption spectroscopy of Pd nanoparticles decorated on multi-walled carbon nanotubes during successive cycles of He/H2 exposure.
Reyhani, A; Mortazavi, S Z; Taherkhani, A; Mohammadi, M R; Mehrabi, M; Parvin, P.
Afiliación
  • Reyhani A; Physics Dept., Faculty of Science, Imam Khomeini International University, P.O. Box 34149-16818, Qazvin, Iran. z.mortazavi@sci.ikiu.ac.ir.
  • Mortazavi SZ; Physics Dept., Faculty of Science, Imam Khomeini International University, P.O. Box 34149-16818, Qazvin, Iran. z.mortazavi@sci.ikiu.ac.ir.
  • Taherkhani A; Physics Dept., Faculty of Science, Imam Khomeini International University, P.O. Box 34149-16818, Qazvin, Iran. z.mortazavi@sci.ikiu.ac.ir.
  • Mohammadi MR; University of Sistan and Baluchestan, Zahedan, 98167-45845, Iran.
  • Mehrabi M; Department of Physics, Persian Gulf University, P.O. Box 75169-13817, Bushehr, Iran.
  • Parvin P; Physics Dept., Amirkabir University of Technology, P.O. Box 15875-4413, Tehran, Iran.
Phys Chem Chem Phys ; 25(1): 749-758, 2022 Dec 21.
Article en En | MEDLINE | ID: mdl-36507865
The MWCNTs are decorated by Pd nanoparticles via various techniques including laser ablation in liquid, chemical reduction, and simultaneously both of them. To study the hydrogen adsorption mechanism, Pd K-edge X-ray absorption spectroscopy (XAS) is carried out via heating/cooling processes under He/H2 exposure. The Fourier transform X-ray absorption fine structure (FT-EXAFS) simulation indicates the presence of the Pd-Pd and Pd-C(O) bonds. Furthermore, during the successive cycles of He/H2 exposure, bond restructuring takes place. Moreover, the heating process under He/H2 exposure induces a destructive effect on the Pd-C(O) links. Furthermore, the Pd-Pd bond distance enlarges due to the hydrogen adsorption for all samples, however, in the case of PLAL, the change in the bond distances becomes dominant. XRD and XPS are applied to support the findings.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Nanotubos de Carbono / Nanopartículas Idioma: En Revista: Phys Chem Chem Phys Asunto de la revista: BIOFISICA / QUIMICA Año: 2022 Tipo del documento: Article País de afiliación: Irán Pais de publicación: Reino Unido
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Nanotubos de Carbono / Nanopartículas Idioma: En Revista: Phys Chem Chem Phys Asunto de la revista: BIOFISICA / QUIMICA Año: 2022 Tipo del documento: Article País de afiliación: Irán Pais de publicación: Reino Unido