[EN] The hydrogen evolution reaction (HER) is the cathodic process in many important electrochemical
technologies. According to the Brewer intermetallyc bonding theory, molybdenum and tungsten were
alloyed with nickel (hypo-hyper-d- electronic transition metal) in order to increase the intrinsic catalytic
activity for HER. Cobalt was also combined with nickel to evaluate the effect of this metal in the intrinsic
catalytic activity. In all the cases, electrodeposition at very high current densities provided macroporous
materials of quasy-cylindrical pores due to the fact that the metallic deposition takes place simultaneously
to the gas bubbling at high current densities.
Morphology of the developed electrodes was characterized by confocal laser scanning microscopy, and
HER on these electrodes was evaluated in 30 wt.% KOH solution by means of steady-state polarization
curves and electrochemical impedance spectroscopy (EIS). Results show that the developed materials
manifest higher apparent catalytic activity than that reported for a smooth commercial polycrystalline nickel
electrode.This work was supported by Generalitat Valenciana (Project PROMETEO/2010/023) and Universitat Politècnica de València (PAID-06-10-2227). I. Herraiz-Cardona is grateful to Fundación Iberdrola for the financial support.González Buch, C.; Herraiz Cardona, I.; Ortega Navarro, EM.; Garcia-Anton, J.; Pérez-Herranz, V. (2013). Development of Ni-Mo, Ni-W and Ni-Co Macroporous Materials for Hydrogen Evolution Reaction. Chemical Engineering Transactions. 32:865-870. https://doi.org/10.3303/CET1332145S8658703
