Journal
JOURNAL OF PHYSICAL CHEMISTRY C
Volume 118, Issue 16, Pages 8406-8415Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp5003897
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Funding
- Progetti di Ricerca di Ateneo-Compagnia di San Paolo - Linea 1 [ORTO11RRT5]
- Russian Federation Government [14.Y26.31.0001]
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Simultaneous time-resolved SAXS and XANES techniques were employed to follow in situ the formation of Pd nanoparticles in a porous polystyrene support, using palladium acetate as a precursor and gaseous H-2 or CO as reducing agents. These results, in conjunction with data obtained by diffuse reflectance UV-vis and DRIFT spectroscopy and TEM measurements, allowed unraveling of the different roles played by gaseous H-2 and CO in the formation of the Pd nanoparticles. In particular, it was found that the reducing agent affects (i) the reduction rate (which is faster in the presence of CO) and (ii) the properties of the hosted nanoparticles, in terms of size (bigger with CO), morphology (spherical with H-2, triangular-like with CO), and surface properties (unclean with CO). The importance of a multitechnique approach in following the whole process of metal nanoparticles formation clearly emerges.
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