Highly dispersed Pd nanoparticles within silica: Synthesis and characterization

Beitrag in einer Fachzeitschrift
(Originalarbeit)


Details zur Publikation

Autor(en): Ofili IJ, Steinrück HP, Schwieger W, Ramakrishnan A, Dumbuya K, Gottfried M
Zeitschrift: Applied Clay Science
Verlag: Elsevier
Jahr der Veröffentlichung: 2011
Band: 51
Seitenbereich: 8-14
ISSN: 0169-1317


Abstract


Well dispersed and homogeneously distributed Pd nanoparticles within a silica matrix were synthesized by a two stage process: (1) intercalation of palladium tetrammine ions into the layered aluminium-free silicate Na ilerite followed by (2) a self-reduction of the complex through decomposition of the tetrammine ligands by calcination at 550°C for 5h under N or air. Samples calcined in N predominantly contained nanoparticles of metallic Pd, while calcination in air led largely to the formation of PdO, as confirmed by XPS and supported by XRD and TGA. Thus, the Pd/PdO loading in the silica can be selectively tuned through this method. The intercalates were characterized by standard methods such as XRD, TGA, ICP and TEM. TGA of the intercalates indicated that the stabilization of the palladium tetrammine complex was enhanced by intercalation into Na ilerite. Based on ICP analysis, the Pd loadings in the intercalates were estimated to be about 18mass-%, which was also in agreement with the results from TGA. TEM revealed that the Pd/PdO nanoparticles were well dispersed in the silica matrix with an average particle size of approximately 8-10nm after calcination in air. © 2010 Elsevier B.V.



FAU-Autoren / FAU-Herausgeber

Ofili, Ifeanyi Jimmy
Professur für Technische Chemie (Reaktionstechnik)
Schwieger, Wilhelm Prof. Dr.
Professur für Technische Chemie (Reaktionstechnik)
Steinrück, Hans-Peter Prof. Dr.
Lehrstuhl für Physikalische Chemie II


Zitierweisen

APA:
Ofili, I.J., Steinrück, H.-P., Schwieger, W., Ramakrishnan, A., Dumbuya, K., & Gottfried, M. (2011). Highly dispersed Pd nanoparticles within silica: Synthesis and characterization. Applied Clay Science, 51, 8-14. https://dx.doi.org/10.1016/j.clay.2010.10.014

MLA:
Ofili, Ifeanyi Jimmy, et al. "Highly dispersed Pd nanoparticles within silica: Synthesis and characterization." Applied Clay Science 51 (2011): 8-14.

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Zuletzt aktualisiert 2018-08-07 um 16:23