INSTITUTO DE QUIMICA, FISICA DE LOS MATERIALES, MEDIOAMBIENTE Y ENERGIA
Unidad Ejecutora - UE
congresos y reuniones científicas
Activation of Macroporous Ni electrodes with Ag and Ag2S Nanoparticles for Hydrogen Production
C. GONZÁLEZ-BUCH; E. M. ORTEGA; G. GONZÁLEZ; I. PEDRE; M. G. SÁNCHEZ-LOREDO; V. PÉREZ-HERRANZ
Congreso; 15th Topical Meeting of the International Society of Electrochemistry; 2014
International society of Electrochemistry
The main goal of modem electrocatalysis for the hydrogen evolution reaction (HER) is to enhance the activity of the electrodes whit less usage of noble metals. Supporting materials with high surface area are essential to reduce the dosage of metal loading. Considering the above facts, in this work, macroporous electrodes have been synthesized by galvanostatic electrodeposition at high current density  and then, they were modified with silver nanoparticles (AgNps). The AgNps were synthesized using polivinylpyrrolidone as the stabilizing agent. The anoparticle dispersion was suspended in a polymer solution containing polyallylamine and sodium dodecylsulfate (see Fig.1a) , and this mixture was deposited on the developed macroporous electrodes. The HER activity of these electrodes was studied in 30% wt. KOH by means pseudo-steady-state polarization curves and electrochemical impedance spectroscopy (EIS). As it can be seen in Fig. 1 b, Nps modified electrodes show higher catalytic activity than the NiHcd electrode and than a commercial smooth Ni electrode.