In Situ IR Studies on the Electro-Oxidation of Cyanide on Ni, Cu and Au Electrodes Electrically Polarized in Dimethyl Sulfoxide (DMSO) Electrolyte Media

Alwis, L. K. H. K.; Mucalo, Michael R.

doi:10.1007/s12678-015-0287-5

Cited by 2 publications

(1 citation statement)

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“…Such a band was found to appear in FTIR spectra upon cyanide oxidation on various metals including Cu [58,59]. By contrast, this band is absent in the Raman spectra obtained in the present work with Cu x Co 3-x O 4 at high potentials (Fig.…”

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confidence: 48%

Electrocatalytic oxidation of cyanide on copper-doped cobalt oxide electrodes

Berenguer

Rosa-Toro

Quijada

et al. 2017

Applied Catalysis B: Environmental

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Copper and copper oxides are well-known excellent catalysts in several chemical processes, but their low mechanical and electrochemical stability restrict their direct utilization as electrodes in electrolytic processes. In this work, the incorporation of copper into cobalt oxide (Cu x Co 3-x O 4 ) is presented as an excellent approach to obtain highly active and robust copper-based electrocatalysts. Particularly, the electrocatalytic performance of Ti-supported Cu x Co 3-x O 4 electrodes (with 0 ≤ x ≤ 1.5) has been studied for the oxidation of cyanide in alkaline media.Cyclic voltammetry and electrolysis runs show an outstanding effect of Cu on the activity, efficiency and kinetics of spinel Cu x Co 3-x O 4 electrodes for CN − electro-oxidation. Despite being active oxides with high activity towards water oxidation, copper saturated (x = 1.0) and oversaturated (x = 1.5) spinels exhibit unprecedented 100 % current efficiencies for the electrooxidation of CN − in aqueous electrolyte. In-situ surface enhanced Raman spectroscopy (SERS) reveals the specific adsorption of CN − ions on surface Cu species to be involved in the electrocatalytic oxidation mechanism. This electrocatalytic activity has been attributed to surface Cu(II) in the spinel lattice. Furthermore, the Cu x Co 3-x O 4 electrodes also display high

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confidence: 48%