Porous Electrodeposited Cu as a Potential Electrode for Electrochemical Reduction Reactions of CO2

Applied Sciences

Joongjai Panpranot¹  Piyasan Praserthdam²  Orawon Chailapakul³  Duangamol N. Tungasmita⁴  Jidsucha Darayen⁵  Yuttanant Boonyongmaneerat⁶ 

[1] Center of Excellence on Catalysis and Catalytic Reaction Engineering (CECC), Chulalongkorn University, Bangkok 10330, Thailand;Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok 10330, Thailand;Electrochemistry and Optical Spectroscopy Center of Excellence (EOSCE), Chulalongkorn University, Bangkok 10330, Thailand;Green Chemistry for Fine Chemical Productions STAR, Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand;Nanoscience and Technology Interdisciplinary Program, Graduate School, Chulalongkorn University, Bangkok 10330, Thailand;Surface Coatings Technology for Metals and Materials Research Unit, Metallurgy and Materials Science Research Institute, Chulalongkorn University, Bangkok 10330, Thailand;

关键词: porous copper;    electrochemical CO₂ reduction;    catalyst;    surface microstructure;   

DOI  :  10.3390/app112311104

来源: DOAJ

【 摘 要 】

In the present study, a systematic investigation is performed to assess the relationship between electroplating parameters, pore morphology and internal surface area of copper deposits which are promising to serve as electrodes for electrochemical reduction reactions of carbon dioxide (CO₂). A set of porous copper deposits are fabricated with the dynamic hydrogen bubble template method. The microstructural and Brunauer–Emmett–Teller (BET) analysis demonstrate that current density, deposition time, and bath composition control pore size, strut size, and hence surface area which could be as high as 20 m²/g. Selected sets of porous copper electrodes are then employed in the electrochemical reduction reaction test to determine their conversion performance in comparison to a monolithic copper surface. From the gas chromatography (GC) and nuclear magnetic resonance (NMR) analysis, porous copper is shown to provide higher rates of production of some important chemicals, as compared to copper foil electrodes. Porous copper with fern-like morphology serves as a promising electrode that yields relatively high amounts of acetaldehyde, acetate and ethanol. The study thus presents the opportunities to enhance the electrochemical reduction reaction of CO₂ through microstructural engineering of the copper surface, which benefits both CO₂ reduction and generation of chemical products of high value.

【 授权许可】

Unknown