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Formation of Copper Catalysts for CO2 Reduction with High Ethylene/Methane Product Ratio Investigated with In Situ X-ray Absorption Spectroscopy
Stockholm University, Faculty of Science, Department of Physics. SLAC National Accelerator Laboratory, United States; Stanford University, United States.
Number of Authors: 4
2016 (English)In: Journal of Physical Chemistry Letters, ISSN 1948-7185, E-ISSN 1948-7185, Vol. 7, no 8, 1466-1470 p.Article in journal (Refereed) Published
Abstract [en]

Nanostructured copper cathodes are among the most efficient and selective catalysts to date for making multicarbon products from the electrochemical carbon dioxide reduction reaction (CO2RR). We report an in situ X-ray absorption spectroscopy investigation of the formation of a copper nanocube CO2RR catalyst with high activity that highly favors ethylene over methane production. The results show that the precursor for the copper nanocube formation is copper(I)-oxide, not copper(I)-chloride as previously assumed. A second route to an electrochemically similar material via a copper(II)-carbonate/hydroxide is also reported. This study highlights the importance of using oxidized copper precursors for constructing selective CO2 reduction catalysts and shows the precursor oxidation state does not affect the electrocatalyst selectivity toward ethylene formation.

Place, publisher, year, edition, pages
2016. Vol. 7, no 8, 1466-1470 p.
National Category
Physical Sciences Chemical Sciences
Identifiers
URN: urn:nbn:se:su:diva-130868DOI: 10.1021/acs.jpclett.6b00367ISI: 000374810800010PubMedID: 27045045OAI: oai:DiVA.org:su-130868DiVA: diva2:934110
Available from: 2016-06-08 Created: 2016-06-07 Last updated: 2016-06-08Bibliographically approved

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