Tuning of Silver Catalyst Mesostructure Promotes Selective Carbon Dioxide Conversion into Fuels
Open Access
- 10 November 2016
- journal article
- research article
- Published by Wiley in Angewandte Chemie-International Edition
- Vol. 55 (49), 15282-15286
- https://doi.org/10.1002/anie.201607942
Abstract
An electrode's performance for catalytic CO2 conversion to fuels is a complex convolution of surface structure and transport effects. Using well-defined mesostructured silver inverse opal (Ag-IO) electrodes, it is demonstrated that mesostructure-induced transport limitations alone serve to increase the turnover frequency for CO2 activation per unit area, while simultaneously improving reaction selectivity. The specific activity for catalyzed CO evolution systematically rises by three-fold and the specific activity for catalyzed H2 evolution systematically declines by ten-fold with increasing mesostructural roughness of Ag-IOs. By exploiting the compounding influence of both of these effects, we demonstrate that mesostructure, rather than surface structure, can be used to tune CO evolution selectivity from less than 5 % to more than 80 %. These results establish electrode mesostructuring as a powerful complementary tool for tuning both catalyst selectivity and efficiency for CO2 conversion into fuels.Keywords
This publication has 30 references indexed in Scilit:
- Mesostructure-Induced Selectivity in CO2 Reduction CatalysisJournal of the American Chemical Society, 2015
- Electrocatalytic Conversion of Carbon Dioxide to Methane and Methanol on Transition Metal SurfacesJournal of the American Chemical Society, 2014
- Electrochemical CO2 Reduction: Recent Advances and Current TrendsIsrael Journal of Chemistry, 2014
- CO2 Reduction at Low Overpotential on Cu Electrodes Resulting from the Reduction of Thick Cu2O FilmsJournal of the American Chemical Society, 2012
- Activity Descriptors for CO2 Electroreduction to Methane on Transition-Metal CatalystsThe Journal of Physical Chemistry Letters, 2012
- New insights into the electrochemical reduction of carbon dioxide on metallic copper surfacesEnergy & Environmental Science, 2012
- The importance of surface morphology in controlling the selectivity of polycrystalline copper for CO2 electroreductionPhysical Chemistry Chemical Physics, 2011
- Electrochemical CO2 Reduction on Metal ElectrodesPublished by Springer Science and Business Media LLC ,2008
- A review of the aqueous electrochemical reduction of CO2 to hydrocarbons at copperJournal of Electroanalytical Chemistry, 2006
- Calculation for the cathode surface concentrations in the electrochemical reduction of CO2 in KHCO3 solutionsJournal of Applied Electrochemistry, 2005