Selective and Low Overpotential Electrochemical CO2 Reduction to Formate on CuS Decorated CuO Heterostructure
| Autor: | Mulatu Kassie Birhanu, Amaha Woldu Kahsay, Meng-Che Tsai, Soressa Abera Chala, Wei-Nien Su, Bing-Joe Hwang, Kassa Belay Ibrahim |
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| Rok vydání: | 2019 |
| Předmět: |
Settore ING-IND/22 - Scienza e Tecnologia dei Materiali
Inorganic chemistry Oxide chemistry.chemical_element CuS · Cu2O/CuO/CuS · Electrocatalyst · Electrochemical CO2 reduction · SILAR method Overpotential 010402 general chemistry Electrocatalyst 01 natural sciences Catalysis chemistry.chemical_compound Adsorption CuS Cu2O/CuO/CuS Electrochemical CO2 reduction SILAR method Formate Settore CHIM/02 - Chimica Fisica Settore CHIM/03 - Chimica Generale e Inorganica 010405 organic chemistry General Chemistry Copper 0104 chemical sciences Copper sulfide chemistry Faraday efficiency |
| Popis: | Cu2O/CuO/CuS electrocatalyst was prepared by thermal oxidation of cleaned copper mesh in the air into Cu2O/CuO and CuS was deposited on oxide surface using facile successive ionic layer adsorption and reaction method. The successive fabrication of the electrocatalyst was confirmed using XRD, SEM, Raman and XPS. The catalytic enhancement is believed to be associated with the reduction of copper sulfide. Together with copper oxides, they offer favorable adsorption sites for electrochemical CO2 reduction. The synthesized catalyst offered significantly enhanced activity and selectivity performance for CO2 reduction at lower overpotential. Remarkably, the faradaic efficiency for formate generation reaches 84% at the potential of − 0.7 V versus RHE. It has also provided a high partial current density of − 20 mA cm− 2. |
| Databáze: | OpenAIRE |
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