Synthesis of polyol based Ag/Pd nanocomposites for applications in catalysis
The synthesis of polyvinylpyrrolidone seed mediated Ag/Pd allied nanobimetallic particles was successfully carried out by the simultaneous reduction of the metal ions in ethylene glycol, diethylene glycol, glycerol, pentaerythritol and sodium borohydride solution. The optical measurement revealed th...
Saved in:
Published in | Results in physics Vol. 4; no. C; pp. 12 - 19 |
---|---|
Main Authors | , , , , , |
Format | Journal Article |
Language | English |
Published |
Elsevier B.V
2014
Elsevier |
Subjects | |
Online Access | Get full text |
Cover
Loading…
Summary: | The synthesis of polyvinylpyrrolidone seed mediated Ag/Pd allied nanobimetallic particles was successfully carried out by the simultaneous reduction of the metal ions in ethylene glycol, diethylene glycol, glycerol, pentaerythritol and sodium borohydride solution. The optical measurement revealed the existence of peak broadening that causes diffusion processes of the metal sols to decrease making it possible to monitor the changes spectrophotometrically. This, together with X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM) and high resolution TEM measurements strongly support the conclusion that intimately alloyed clusters were formed and the particle growth anisotropy is diffusion limited. Finally, the catalytic potential of the nanocomposites was investigated using 4-nitrophenol in the presence of sodium borohydride at 299K; a good linear fitting of ln(A/A0) versus the reaction time was obtained, indicating pseudo-first-order kinetics. |
---|---|
ISSN: | 2211-3797 2211-3797 |
DOI: | 10.1016/j.rinp.2014.02.002 |