Cu₂O/CuO Electrocatalyst for Electrochemical Reduction of Carbon Dioxide to Methanol

Abstract

Herein, we report the controlled and direct fabrication of Cu2O/CuO thin film on the conductive nickel foam using electrodeposition route for the electrochemical reduction of carbon dioxide (CO2) to methanol. The electrocatalytic reduction was performed in CO2 saturated aqueous solution consisting of KHCO3, pyridine and HCl at room temperature. CO2 reduction was carried out at a constant potential of −1.3 V for 120 min to study the electrochemical performance of the prepared electrocatalysts. Cu2O/CuO shows better electrocatalytic activity with highest current density of 46 mA/cm2. The prepared catalyst can be an efficient and selective electrode for the production of methanol.

Highly Efficient CO2 Electroreduction to Methanol through Atomically Dispersed Sn Coupled with Defective CuO Catalysts

“…Cu + or Cu 0 species exists in Sn 1 /V o ‐CuO‐ x , but it is hard to distinguish from XPS spectra due to the similarity in the binding energies. Therefore, the Cu Auger L 3 M 45 M 45 transition was also performed to provide more insight into the electronic structures and surface state (Figure S8), [14] indicating the coexistence of Cu + and Cu 0 species on Sn 1 /V o ‐CuO‐ x .…”

“…Theq uasi-operando X-ray photoelectron spectroscopy (XPS) revealed the composition and valence state of the catalysts.T he binding energies of 495.4 and 486.9 eV for Sn 3d 3/2 and Sn 3d 5/2 indicated the oxidation state of Sn [41] (Figure S5,6). Figure S7 showed that the Cu 2p XPS spectra of Sn 1 /V o -CuO-x exhibited significantly distinct Cu features compared with that of Sn 1 /CuO.I tc an be seen that the Cu 2+ peaks disappeared gradually as the increasing H-plasma treatment time.C u + or Cu 0 species exists in Sn 1 /V o -CuO-x, but it is hard to distinguish from XPS spectra due to the similarity in the binding energies.T herefore,t he Cu Auger L 3 M 45 M 45 transition was also performed to provide more insight into the electronic structures and surface state (Figure S8), [14] indicating the coexistence of Cu + and Cu 0 species on Sn 1 /V o -CuO-x.…”

“…Some catalysts, such as RuO 2 /TiO 2 , [7] Pd/SnO 2 , [8] Mo‐Bi sulphides, [9] Pd‐Cu aerogels [10] and Cu 2− x Se y [11] have been designed to achieve considerable progress for methanol production from CO 2 electroreduction [12, 13] . However, the low efficiency, high overpotential, and poor stability of catalysts hinder its practical use to some degree [7, 14, 15] . Therefore, there is a strong need for developing highly active and robust electrocatalysts that can generate methanol with high selectivity and high current density.…”

“…[12,13] However,t he low efficiency, high overpotential, and poor stability of catalysts hinder its practical use to some degree. [7,14,15] Therefore,t here is as trong need for developing highly active and robust electrocatalysts that can generate methanol with high selectivity and high current density.…”

A New Nanocomposite Based on Pt‐rGO Embedded Polymelamine Formaldehyde Nanocomposite for Reduction of Carbon Dioxide

“…Over the past 100 years, CO 2 concentration has greatly risen by 100 ppm. Given its cost-efficiency, non-toxicity, and abundance, CO 2 has attracted a lot of attention for transforming it into useful chemicals such as methanol, formic acid, and hydrocarbons [1][2][3][4][5]. From among the materials to which CO 2 can be transformed, methanol is of paramount importance for its potential uses in fuel cells and internal combustion engines [6].…”