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Catalyst Particle Density Controls Hydrocarbon Product Selectivity in CO2 Electroreduction on CuO x.
- Source :
- ChemSusChem; 11/23/2017, Vol. 10 Issue 22, p4642-4649, 8p
- Publication Year :
- 2017
-
Abstract
- A key challenge of the carbon dioxide electroreduction (CO2RR) on Cu-based nanoparticles is its low faradic selectivity toward higher-value products such as ethylene. Here, we demonstrate a facile method for tuning the hydrocarbon selectivities on CuO<subscript> x</subscript> nanoparticle ensembles by varying the nanoparticle areal density. The sensitive dependence of the experimental ethylene selectivity on catalyst particle areal density is attributed to a diffusional interparticle coupling that controls the de- and re-adsorption of CO and thus the effective coverage of CO<subscript>ad</subscript> intermediates. Thus, higher areal density constitutes dynamically favored conditions for CO re-adsorption and *CO dimerization leading to ethylene formation independent of pH and applied overpotential. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 18645631
- Volume :
- 10
- Issue :
- 22
- Database :
- Complementary Index
- Journal :
- ChemSusChem
- Publication Type :
- Academic Journal
- Accession number :
- 126406433
- Full Text :
- https://doi.org/10.1002/cssc.201701179