Electrochemical reduction of CO2 on electrodeposited Cu electrodes crystalline phase sensitivity on selectivity
作者： Gopalram Keerthiga , Balasubramanian Viswanathan , Raghuram Chetty
DOI: 10.1016/J.CATTOD.2014.08.008
关键词: Inorganic chemistry 、 Hydrogen 、 Copper 、 Electrochemistry 、 Electrode 、 Materials science 、 Faraday efficiency 、 Texture (crystalline) 、 Product distribution 、 Electrolyte 、 General chemistry 、 Catalysis
摘要: Abstract The product distribution of electrochemical reduction CO 2 can be altered by modifying the surface pure copper deposition. In this study, chronoamperometric deposition Cu on (Cu/Cu) was carried out at two different CuSO 4 bath concentrations, 0.25 M (high) and 0.025 M (low), termed as Cu/Cu-H Cu/Cu-L respectively. These deposits were characterized X-ray diffraction they vary in their crystal orientation. Pure Cu/Cu aligned towards (1 1 1) (2 2 0) plane with a texture coefficient 1.2 1.7, Electrodeposited electrodes tested for KCl electrolyte results compared that electrode. Electrochemical showed methane ethane, hydrogen byproduct. varied orientation electrodes. maximum Faradaic efficiency 26% obtained electrode (2 0 0) orientation, whereas dominating formation ethane 43%. A possible mechanism C 1 is also discussed.
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