Screening of material libraries for electrochemical CO2 reduction catalysts – Improving selectivity of Cu by mixing with Co
| Autor: | Alfred Ludwig, Karl Johann Jakob Mayrhofer, Jan-Philipp Grote, Benjamin Breitbach, Aleksandar R. Žeradjanin, Serhiy Cherevko, Alan Savan |
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| Rok vydání: | 2016 |
| Předmět: |
Chemical substance
Chemistry Nanotechnology 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences Catalysis 0104 chemical sciences Adsorption Chemical engineering Sample preparation Physical and Theoretical Chemistry Thin film 0210 nano-technology Science technology and society Selectivity |
| Zdroj: | Journal of Catalysis. 343:248-256 |
| ISSN: | 0021-9517 |
| Popis: | The efficiency of the direct electrochemical CO 2 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 C 2 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. |
| Databáze: | OpenAIRE |
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