کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
178729 459316 2016 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Comparison of electrocatalytic reduction of CO2 to HCOOH with different tin oxides on carbon nanotubes
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Comparison of electrocatalytic reduction of CO2 to HCOOH with different tin oxides on carbon nanotubes
چکیده انگلیسی


• Two SnOx/MWCNT and two SnO2/MWCNT cathodes were prepared for the electrochemical reduction of CO2 to formate.
• A 60% faradaic efficiency with 25% energy efficiency was obtained with the two SnOx/MWCNT cathodes.
• The efficiencies were not strongly influenced by the morphology of the particle agglomeration.

A comparative study is reported on the electrocatalytic reduction of CO2 to HCOOH in aqueous alkaline solution with differently prepared tin-oxide particles on multi-walled carbon nanotubes from SnCl2 or SnCl4 precursors. The highest faradaic and energy efficiencies of 64% and 27% were obtained at − 1.40 V vs. SCE with particles that were obtained by KBH4 reduction from a SnCl2 precursor. At lower potentials, competitive reduction reactions occur. A SnCl2 versus SnCl4 precursor favors retention of a Sn(II) valence state in a surface tin oxyhydroxide surface layer. Different morphologies of the particle agglomerates made little difference in the electrocatalytic selectivity and activity. The two SnOx/CNT electrodes both showed a current density retention of ~ 70% after a 20-h electrolysis.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochemistry Communications - Volume 65, April 2016, Pages 9–13
نویسندگان
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