journal article·2020-06-12Open access

Revealing the Active Phase of Copper during the Electroreduction of CO2 in Aqueous Electrolyte by Correlating In Situ X-ray Spectroscopy and In Situ Electron Microscopy

Juan-Jesus Velasco-Velez, Rik V. Mom, Luis-Ernesto Sandoval-Diaz, Lorenz J. Falling, Cheng-Hao Chuang, Dunfeng Gao, Travis E. Jones, Qingjun Zhu, Rosa Arrigo, Beatriz Roldan Cuenya, Axel Knop-Gericke, Thomas Lunkenbein, Robert Schlögl

ACS Energy Letters· Volume 5· Issue 6

Abstract

The variation in the morphology and electronic structure of copper during the electroreduction of CO2 into valuable hydrocarbons and alcohols was revealed by combining in situ surface- and bulk-sensitive X-ray spectroscopies with electrochemical scanning electron microscopy. These experiments proved that the electrified interface surface and near-surface are dominated by reduced copper. The selectivity to the formation of the key C-C bond is enhanced at higher cathodic potentials as a consequence of increased copper metallicity. In addition, the reduction of the copper oxide electrode and oxygen loss in the lattice reconstructs the electrode to yield a rougher surface with more uncoordinated sites, which controls the dissociation barrier of water and CO2. Thus, according to these results, copper oxide species can only be stabilized kinetically under CO2 reduction reaction conditions.
Source: europepmc · Quality: candidate unverified · Source record ↗

Research context

OpenAlex topics: CO2 Reduction Techniques and Catalysts · Ionic liquids properties and applications · Advanced Thermoelectric Materials and Devices

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Heterogeneous Reactions, Max Planck Institute for Chemical Energy Conversion, Mülheim an der Ruhr 45470, Germany

Department of Inorganic Chemistry, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Berlin 14195, Germany

Department of Physics, Tamkang University, New Taipei City 25137, Taiwan

Department of Interface Science, Fritz-Haber-Institute of the Max-Planck Society, 14195 Berlin, Germany

State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 116023 Dalian, China

School of Science, Engineering and Environment, University of Salford, 314 Cockcroft Building, M5 4 WT Manchester, U.K.

Funding

Ministry of Science and Technology · Deutscher Akademischer Austausch Dienst Kairo · Bundesministerium f?r Bildung und Forschung · H2020 European Research Council

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