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Hydrophobic surface efficiently boosting Cu2O nanowires photoelectrochemical CO2 reduction activity.
- Source :
- Chemical Communications; 5/14/2023, Vol. 59 Issue 39, p5914-5917, 4p
- Publication Year :
- 2023
-
Abstract
- The limited mass transfer of CO<subscript>2</subscript> and the competitive hydrogen evolution reaction (HER) during photoelectrochemical (PEC) CO<subscript>2</subscript> reduction usually result in low CO<subscript>2</subscript> reduction activity. Here, we constructed a Cu<subscript>2</subscript>O/Sn/PTFE photocathode with a hydrophobic surface based on Cu<subscript>2</subscript>O by physical vapor deposition and a dipping method. The CO faradaic efficiency (FE) increased from 34.5% (Cu<subscript>2</subscript>O) to 95.1% (Cu<subscript>2</subscript>O/Sn/PTFE) at −0.7 V vs. RHE, and the FE<subscript>H2</subscript> decreased from 27.9% (Cu<subscript>2</subscript>O) to 3.8% (Cu<subscript>2</subscript>O/Sn/PTFE). The introduction of the hydrophobic layer enhances the local CO<subscript>2</subscript> concentration on the electrode surface and effectively isolates H<superscript>+</superscript> from the aqueous electrolyte, thereby enhancing the CO<subscript>2</subscript> reduction activity. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 13597345
- Volume :
- 59
- Issue :
- 39
- Database :
- Complementary Index
- Journal :
- Chemical Communications
- Publication Type :
- Academic Journal
- Accession number :
- 163680001
- Full Text :
- https://doi.org/10.1039/d3cc00825h