Screening of material libraries for electrochemical {CO2} reduction catalysts
By Grote, Jan-Philipp; Zeradjanin, Aleksandar R.; Cherevko, Serhiy; Savan, Alan; Breitbach, Benjamin; Ludwig, Alfred; Mayrhofer, Karl J. J.
Published in Journal of Catalysis
NULL
2016
Abstract
Abstract The efficiency of the direct electrochemical {CO2} reduction can be improved by the development of new alloy catalysts, but to do so a highly resolved composition screening remains to be connected to complex sample preparation and time consuming analysis. We have developed a technique that allows a fast and easy initial catalyst composition screening by analyzing thin film composition spread samples, utilizing a scanning flow cell coupled to an online electrochemical mass spectrometer (SFC-OLEMS). As a first case example, the investigation of a Cu-Co thin film material library demonstrates the benefits and high potential of this approach. In particular, a shift in selectivity toward {C2} species for low Co content (5-15 at.%) has been found and is discussed as being related to changed adsorption energies of intermediate products and the consequent modification of reaction pathways.
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