INQUIMAE   12526
INSTITUTO DE QUIMICA, FISICA DE LOS MATERIALES, MEDIOAMBIENTE Y ENERGIA
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Activation of Macroporous Ni electrodes with Ag and Ag2S Nanoparticles for Hydrogen Production
Autor/es:
C. GONZÁLEZ-BUCH; E. M. ORTEGA; G. GONZÁLEZ; I. PEDRE; M. G. SÁNCHEZ-LOREDO; V. PÉREZ-HERRANZ
Lugar:
Niagara Falls
Reunión:
Congreso; 15th Topical Meeting of the International Society of Electrochemistry; 2014
Institución organizadora:
International society of Electrochemistry
Resumen:
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
[1] 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) [2], 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.