journal article·2023-05Open access

Cationic Copper Species Stabilized by Zinc during the Electrocatalytic Reduction of CO2 Revealed by In Situ X‐Ray Spectroscopy

Juan‐Jesús Velasco‐Vélez, Jeffrey Poon, Dunfeng Gao, Cheng‐Hao Chuang, Arno Bergmann, Travis E. Jones, Shu‐Chih Haw, Jin‐Ming Chen, Emilia Carbonio, Rik V. Mom, Danail Ivanov, Rosa Arrigo, Beatriz Roldan Cuenya, Axel Knop‐Gericke, Robert Schlögl

Advanced Sustainable Systems· Volume 7· Issue 5

Abstract

Abstract Advanced in situ X‐ray absorption spectroscopy characterization of electrochemically co‐electrodeposited bi‐element copper alloy electrodes shows that zinc yields the formation of a stable cationic Cu species during the electroreduction of CO2 at high cathodic polarization. In contrast, the formation/stabilization of cationic Cu species in copper oxides, or doping Cu with another element, like Ni, is not possible. It is found that the pure and mixed Cu:Zn electrodes behave similarly in term of electrocatalytic selectivity to multi‐carbon products. At higher Zn concentrations the electrode behaves like the pure Zn catalyst, which indicates that the Cu cationic species do not have a significant influence on the selectivity to multi‐carbon products. It is found that in the non‐monotonically distribution of products is dominated in term of surface energy in which copper prefers the surface. Otherwise, this work highlights the importance of in situ characterization to uncover the mechanisms mediating the catalytic reactions in contrast to ex situ or post mortem analysis, which can be a source of misinterpretation.
Source: crossref · Quality: baseline

Research context

OpenAlex topics: CO2 Reduction Techniques and Catalysts · Ionic liquids properties and applications · Electrochemical Analysis and Applications

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

Affiliations

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

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

ALBA Synchrotron Light Source Cerdanyola del Vallés Barcelona 08290 Spain

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 Dalian 116023 China

Department of Physics Tamkang University New Taipei City 25137 Taiwan

Los Alamos National Laboratory Los Alamos NM 87545 USA

National Synchrotron Radiation Research Center No. 101, Hsin Ann Rr., East District Hsinchu 30076 Taiwan

Helmholtz‐Zemtrum Berlin für Materialien und Energie 14109 Berlin Germany

School of Sciences University of Salford Environment and Life, Cockcroft building Manchester M5 4 WT UK

Funding

Deutscher Akademischer Austauschdienst · Bundesministerium für Bildung und Forschung · European Research Council · Deutsche Forschungsgemeinschaft · Croucher Foundation · U.S. Department of Energy · Office of Science

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