Pd nanoparticles formation inside porous polymeric scaffolds followed by in situ XANES/SAXS

16th International Conference on X-ray Absorption Fine Structure

Longo, A.^1,2 ; Lamberti, C.^3,4 ; Agostini, G.^5,6 ; Borfecchia, E.^5 ; Lazzarini, A.^5 ; Liu, W.^5,7 ; Giannici, F.^8 ; Portale, G.^1 ; Groppo, E.^5

Netherlands Organization for Scientific Research at ESRF, Grenoble, France^1

CNR, Istituto per Lo Studio Dei Materiali Nanostrutturati, Palermo, Italy^2

Southern Federal University, Rostov-on-Don, Russia^3

Dept. of Chemistry, CrisDi Centre for Crystallography, University of Turin, Turin, Italy^4

Dept. of Chemistry, NIS, INSTM Reference Centers, University of Turin, Turin, Italy^5

European Synchrotron Radiation Facility (ESRF), Grenoble, France^6

School of Environmental and Chemical Engineering, Tianjin Polytechnic University, Tianjin, China^7

Dipartimento di Fisica e Chimica, Università di Palermo, Italy^8

关键词: Diffuse reflectance;    Gasphase;    Palladium acetate;    PD nano particle;    Polymeric scaffold;    Polymeric supports;    Situ XANES;    Time-resolved SAXS;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/712/1/012039/pdf
DOI  :  10.1088/1742-6596/712/1/012039

来源: IOP

【 摘 要 】

Simultaneous time-resolved SAXS and XANES techniques were employed to follow in situ the formation of Pd nanoparticles from palladium acetate precursor in two porous polymeric supports: polystyrene (PS) and poly(4-vinyl-pyridine) (P4VP). In this study we have investigated the effect of the use of different reducing agents (H2and CO) from the gas phase. These results, in conjunction with data obtained by diffuse reflectance IR (DRIFT) spectroscopy and TEM measurements, allowed us to unravel the different roles played by gaseous H2and CO in the formation of the Pd nanoparticles for both PS and P4VP hosting scaffolds.