Decreasing the value of the cell potential using nPt/C|Ti and RuO2|Ti as cathodes in a reactor for electro leaching of electronic e-waste

  • J.C. Ramírez-Castellanos
  • M. Luna-Trujillo
  • V.E. Reyes-Cruz
  • A. Manzo-Robledo
  • G. Urbano-Reyes
  • M.A. Veloz-Rodríguez
  • J.C. Juarez-Tapia
  • J.A. Cobos-Murcia Universidad Autónoma del Estado de Hidalgo http://orcid.org/0000-0002-9946-5785
Keywords: Hydrogen Evolution Reaction, E-waste, Electroleaching, STY, Electrochemical reactor

Abstract

This work has to purpose decrease the value of the cell potential (Ecell) of an electrochemical reactor with a separate compartment with an anionic membrane designed for electro-leaching electronic waste (E-waste). In the anodic compartment using a titanium plate in HNO3 as an anolyte, while the electro-leaching of the metals and the evaluation of the oxygen evolution reaction (OER) was studied. Three different cathodes (Platinum; Pt, titanium coated with ruthenium oxide; RuO2|Ti and titanium coated with platinum nanoparticles; nPt/C|Ti) were used for the catalysis of the evolution reaction of hydrogen (HER) in a solution of H2SO4. The results obtained by voltammetry indicate that the electrodes modified with RuO2 and nPt/C, promote a greater cathodic current for the HER, decreasing the cell potential and increase the current density of the induced metallic electro-leaching. This implies the decrease of the electrical power that the reactor requires during its operation. Obtaining Space-time yield (STY) values of 123.4 and 64 mol·L-1·h-1·cm-2 for the carbon and platinum nanoparticle and the ruthenium oxide catalysts respectively.

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Published
2021-06-09
How to Cite
Ramírez-Castellanos, J., Luna-Trujillo, M., Reyes-Cruz, V., Manzo-Robledo, A., Urbano-Reyes, G., Veloz-Rodríguez, M., Juarez-Tapia, J., & Cobos-Murcia, J. (2021). Decreasing the value of the cell potential using nPt/C|Ti and RuO2|Ti as cathodes in a reactor for electro leaching of electronic e-waste. Revista Mexicana De Ingeniería Química, 20(3), Cat1852: 1-12. https://doi.org/10.24275/rmiq/Cat1852
Section
Catalysis, kinetics and reactors