Composite electrodes with metal matrix for the hydrogen evolution reaction

Authors

  • Ysrael Marrero Vera Universidad de la Habana
  • Carlos A. Núñez Valdés Universidad de la Habana
  • Mónica Trueba Urra Universidad de la Habana

Abstract

The industrial and technological development reached by humanity has increased the consumption of energy, which comes mainly from non-renewable and very contaminating to levels which endanger global ecology. Because of this, different sources of alternative energy have been developing from renewable resources. The most promising one seems to be the electrolytic hydrogen, and with this in mind different electrodes are being developed at the moment, which allow the obtainment of this gas more favorably. The hydrogen evolution reaction (HER) on Ni/Al2O3 and Ni/ TiO2 composite electrodes in KOH 1 mol/L at room temperature using a quasi-steady polarization technique was studied. By electrolytic deposition of nickel and codeposition of Al2O3 or TiO2 with different particle size (f) the electrodes were obtained. The composition of the electrodes was determined by means of chemical analysis, and X-ray diffraction technique was used to study the structure of the deposits. Considerable quantities of oxide in the deposits can not be obtained by means of the method used to prepare the composite electrodes. This was confirmed by DRX technique. The values of io, b and E200 indicate better electrocatalytic activity for HER on the Ni/Al2O3 electrodes in respect of Ni electrodes, being greater for the former with Al2O3 < 32 mm and lower on the Ni/TiO2 electrodes. With regard to HER mechanism on the electrodes drawing any conclusions is not possible because some of them predict the same values of b.

Published

2022-06-01

How to Cite

Marrero Vera, Y. ., Núñez Valdés, C. A. ., & Trueba Urra, M. . (2022). Composite electrodes with metal matrix for the hydrogen evolution reaction. NATIONAL CENTER FOR SCIENTIFIC RESEARCH (CENIC) CHEMICAL SCIENCES JOURNAL, 32(3), 159-163. Retrieved from https://revista.cnic.cu/index.php/RevQuim/article/view/1669

Issue

Section

Research articles