DataVXACS Applied Materials & InterfacesPaper
journal article·2023-06-28Open access

Assessment of the Degradation Mechanisms of Cu Electrodes during the CO2 Reduction Reaction

Rik V. Mom, Luis-Ernesto Sandoval-Diaz, Dunfeng Gao, Cheng-Hao Chuang, Emilia A. Carbonio, Travis E. Jones, Rosa Arrigo, Danail Ivanov, Michael Hävecker, Beatriz Roldan Cuenya, Robert Schlögl, Thomas Lunkenbein, Axel Knop-Gericke, Juan-Jesús Velasco-Vélez

ACS Applied Materials & Interfaces· Volume 15· Issue 25
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Source abstract

Abstract

Catalyst degradation and product selectivity changes are two of the key challenges in the electrochemical reduction of CO 2 on copper electrodes. Yet, these aspects are often overlooked. Here, we combine in situ X-ray spectroscopy, in situ electron microscopy, and ex situ characterization techniques to follow the long-term evolution of the catalyst morphology, electronic structure, surface composition, activity, and product selectivity of Cu nanosized crystals during the CO 2 reduction reaction. We found no changes in the electronic structure of the electrode under cathodic potentiostatic control over time, nor was there any build-up of contaminants. In contrast, the electrode morphology is modified by prolonged CO 2 electroreduction, which transforms the initially faceted Cu particles into a rough/rounded structure. In conjunction with these morphological changes, the current increases and the selectivity changes from value-added hydrocarbons to less valuable side reaction products, i.e., hydrogen and CO. Hence, our results suggest that the stabilization of a faceted Cu morphology is pivotal for ensuring optimal long-term performance in the selective reduction of CO 2 into hydrocarbons and oxygenated products.
Source: openalex_inverted_index · Quality: baseline

Research context

NanomaterialsCatalysis & surfaces

OpenAlex topics: CO2 Reduction Techniques and Catalysts · Ionic liquids properties and applications · Electrocatalysts for Energy Conversion

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

Affiliations

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

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

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

Helmholtz-Zemtrum Berlin für Materialien und Energie, 14109 Berlin, Germany

Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States

School of Sciences, University of Salford, Environment and Life, Cockcroft Building, M5 4WT Manchester, U.K

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

ALBA Synchrotron Light Source, Cerdanyola del Vallés (Barcelona) 08290, Spain

Funding

Bundesministerium f?r Bildung und Forschung · Deutscher Akademischer Austauschdienst · Deutsche Forschungsgemeinschaft · Ministry of Science and Technology, Taiwan · H2020 European Research Council

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