TY - JOUR
T1 - 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
AU - Ramírez-Castellanos, J. C.
AU - Luna-Trujillo, M.
AU - Reyes-Cruz, V. E.
AU - Manzo-Robledo, A.
AU - Urbano-Reyes, G.
AU - Veloz-Rodríguez, M. A.
AU - Juárez-Tapia, J. C.
AU - Cobos-Murcia, J. A.
N1 - Publisher Copyright:
© 2021, Universidad Autonoma Metropolitana. All rights reserved.
PY - 2021
Y1 - 2021
N2 - In this work, the cell potential during an electrochemical reaction in a separate compartment with anionic-membrane designed for electro-leaching of electronic-waste (E-waste) was studied. For such an approach, in the anode-side the electro-leaching of metals and the oxygen evolution reaction (OER) were monitored using a titanium plate in a HNO3 solution. Whereas, in the cathodic-side three different cathodes (smooth-Pt, titanium coated with ruthenium oxide (RuO2|Ti) and titanium coated with platinum nanoparticles (nPt/C|Ti)) were used in a solution of H2SO4. From the current versus potential characteristics, it has been demonstrated in this work that the modified electrodes promote a better cathodic current for the hydrogen evolution reaction (HER) decreasing the cell potential and then, increasing the current density of the induced metallic electro-leaching in the anodeside. The calculated space-time yield (STY) was ca. 123.4 and 64 mol.L-1.h-1.cm-2 for (nPt/C|Ti) and RuO2|Ti catalysts, respectively. These results put in clear that the use of catalysts at the nano-metric scale could be an interesting alternative to increase the selectivity and conversion of the electro-leaching process at relative low cost.
AB - In this work, the cell potential during an electrochemical reaction in a separate compartment with anionic-membrane designed for electro-leaching of electronic-waste (E-waste) was studied. For such an approach, in the anode-side the electro-leaching of metals and the oxygen evolution reaction (OER) were monitored using a titanium plate in a HNO3 solution. Whereas, in the cathodic-side three different cathodes (smooth-Pt, titanium coated with ruthenium oxide (RuO2|Ti) and titanium coated with platinum nanoparticles (nPt/C|Ti)) were used in a solution of H2SO4. From the current versus potential characteristics, it has been demonstrated in this work that the modified electrodes promote a better cathodic current for the hydrogen evolution reaction (HER) decreasing the cell potential and then, increasing the current density of the induced metallic electro-leaching in the anodeside. The calculated space-time yield (STY) was ca. 123.4 and 64 mol.L-1.h-1.cm-2 for (nPt/C|Ti) and RuO2|Ti catalysts, respectively. These results put in clear that the use of catalysts at the nano-metric scale could be an interesting alternative to increase the selectivity and conversion of the electro-leaching process at relative low cost.
KW - E-waste
KW - Electro-leaching
KW - Hydrogen evolution reaction
KW - Nanoparticles
KW - Reactor-design
UR - http://www.scopus.com/inward/record.url?scp=85109521273&partnerID=8YFLogxK
U2 - 10.24275/rmiq/Cat1852
DO - 10.24275/rmiq/Cat1852
M3 - Artículo
AN - SCOPUS:85109521273
SN - 1665-2738
VL - 20
JO - Revista Mexicana de Ingeniera Quimica
JF - Revista Mexicana de Ingeniera Quimica
IS - 3
M1 - Cat1852
ER -