Testing a Silver Nanowire Catalyst for the Selective CO₂ Reduction in a Gas Diffusion Electrode Half-cell Setup Enabling High Mass Transport Conditions.

Autor:	Gálvez-Vázquez MJ; Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, Bern CH-3012., Alinejad S; Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, Bern CH-3012., Hu H; Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, Bern CH-3012., Hou Y; Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, Bern CH-3012., Moreno-García P; Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, Bern CH-3012., Zana A; Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, Bern CH-3012., Wiberg GKH; Department of Physical Science, Harold Washington College, City colleges of Chicago, 30 E Lake St, Chicago, IL 60601 USA., Broekmann P; Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, Bern CH-3012;, Email: peter.broekmann@dcb.unibe.ch., Arenz M; Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, Bern CH-3012;, Email: matthias.arenz@dcb.unibe.ch.
Jazyk:	angličtina
Zdroj:	Chimia [Chimia (Aarau)] 2019 Nov 01; Vol. 73 (11), pp. 922-927.
DOI:	10.2533/chimia.2019.922
Abstrakt:	In this work, we discuss the application of a gas diffusion electrode (GDE) setup for benchmarking electrocatalysts for the reductive conversion of CO₂ (CO₂ RR: CO₂ reduction reaction). Applying a silver nanowire (Ag-NW) based catalyst, it is demonstrated that in the GDE setup conditions can be reached, which are relevant for the industrial conversion of CO₂ to CO. This reaction is part of the so-called 'Rheticus' process that uses the CO for the subsequent production of butanol and hexanol based on a fermentation approach. In contrast to conventional half-cell measurements using a liquid electrolyte, in the GDE setup CO₂ RR current densities comparable to technical cells (>100 mA cm -2 ) are reached without suffering from mass transport limitations of the CO₂ reactant gas. The results are of particular importance for designing CO₂ RR catalysts exhibiting high faradaic efficiencies towards CO at technological reaction rates.
Databáze:	MEDLINE
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