Solvents: pure ethanol (VWR, 100%) and diethylether (VWR, 100% Thermogravimetric analysis (TGA) and differential thermal analysis (DTA) were carried out using a Setaram Labsys Evo under pure O 2 . The samples were heated in a crucible alumina based with a large volume 1000 μl and in the 1150 C° -1600 °C range with the weighting range +/-1 000 mg to +/-200 mg. NMR spectra were recorded using a Bruker AVANCE III 400MHz spectrometer. Chemical changes are given in parts per million (ppm, d) relative to the solvent peak as the internal standard (DMSO). X-ray photoelectron spectroscopy (XPS) analyses were performed using a K Alpha machine equipped with microfocused, monochromatic Al Kα X-ray source (hν = 1486.6 eV, spot size = 400 μm). The pass energy was set at 200 and 80 eV for the survey and the narrow regions, respectively. A flood gun was used for static charge compensation. Surface chemical composition was determined using the manufacturer's sensitivity factors. Infrared (IR) spectra were recorded with a Nicolet 8700 spectrometer with a Mercury Cadmium Telluride (MCT) detector. TEM imaging was done with Jeol 2010 (LaB6) (Jeol Ltd., Tokyo, Japan), dedicated to the medium-resolution structural and chemical analysis. The microscope was operating at 80 kV acceleration voltage. UV-vis spectra were recorded on a Cary 4000 UV-Visible spectrophotometer to collect information on NP surface plasmon resonance (SPR) and their sizes. Electrochemical properties were investigated using VSP Potentiostat Bio-Logic, with current ranging from 10 μA to 1 A. In this regard it was used from a classical three-electrode cell with a glassy carbon disk electrode (geometric area= 0.07 cm 2 ) as the working electrode. The counter electrode was platinum wire and the reference electrode was Ag/AgCl (3.5 M KCl). Electrochemical measurements were performed in the aqueous electrolyte of 10 -1 mol L -1 NaOH, using software EC-Lab® Express.