کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
179211 | 459342 | 2014 | 4 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Formation of Cu nanostructured electrode surfaces by an annealing–electroreduction procedure to achieve high-efficiency CO2 electroreduction Formation of Cu nanostructured electrode surfaces by an annealing–electroreduction procedure to achieve high-efficiency CO2 electroreduction](/preview/png/179211.png)
• An effective fibrous Cu electrode surface was proposed.
• The Cu electrode surface contained a layered nanosphere–nanofiber structure.
• A surface area of 458.1 cm2/cm2 was achieved.
• The fibrous Cu electrode surface was high active for CO2 electroreduction.
• A Faradaic efficiency of HCOO- yield reached 43% at low overpotentials.
• The electrode surface is stable over 19 hours electrolysis compared to smooth Cu.
An effective fibrous Cu electrode surface, created using a procedure combining high-temperature annealing and electroreduction, is explored for CO2 reduction to produce useful fuels. The nanostructure of this Cu electrode surface contains a layer of nanofibers or nanofibers surrounded by kernels with 30–100 nm diameters. With a specific surface area as high as 458 cm2 per geometric electrode surface area, this nanostructured electrode is found to have a high activity toward CO2 reduction, indicated by its more positive reduction potentials and higher catalytic current density than a smooth Cu electrode. The Faradaic efficiency for HCOO− production is 43%, and the electrode surface remains stable during 19 h of electrolysis — better results than with smooth Cu under identical conditions.
Journal: Electrochemistry Communications - Volume 38, January 2014, Pages 8–11