کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6470771 | 1424112 | 2017 | 7 صفحه PDF | دانلود رایگان |
- Synthesis and characterization of graphene/ZnO/Cu2O structure at low temperature â¼34 °C.
- Under CO2 saturation, incorporation of Cu2O into graphene/ZnO result in a higher cathodic current density, and the largest current density value was obtained for catalyst with a ZnO/Cu2O weight ratio of 1:2.
- The maximum Faradaic efficiency for CO2 conversion to n-propanol was 30% using GN/ZnO/Cu2O (with a ZnO/Cu2O weight ratio of 2:1) at â0.9Â V vs Ag/AgCl.
In this work, Graphene (GN)/ZnO/Cu2O electrodes were fabricated and tested for CO2 electroreduction in 0.5 M NaHCO3 electrolyte. The XRD, FESEM, and XPS results confirm the successful synthesis of the Cu(I) oxide and ZnO composites at low temperature 34 °C, using simple wet-chemical approach. Linear sweep voltammetry and potentiostatic experiments were carried out for the GN/ZnO/Cu2O catalyst coated on Cu foil. In CO2 saturated electrolyte, the cathodic current density of the catalyst shows significant increase from â¼4 mA/cm2 for GN/ZnO to â¼8 mA/cm2 for GN/ZnO/Cu2O at â1.8 V vs. Ag/AgCl, and the largest current density value was obtained for catalyst with a ZnO/Cu2O weight ratio of 1:2. The CO2 electroreduction on the GN/ZnO/Cu2O catalyst mainly produced n-propanol in the liquid product fraction. The maximum Faradaic efficiency for CO2 conversion to n-propanol was 30% (â¼1.34 ppm) for GN/ZnO/Cu2O (with a ZnO/Cu2O weight ratio of 2:1) at an applied potential of â0.9 V vs. Ag/AgCl.
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Journal: Electrochimica Acta - Volume 245, 10 August 2017, Pages 456-462