journal article·2024-12-13Open access

Zero-Gap Electrolyzers Accelerate Reconstruction of Cu2O-Derived Catalysts under CO2 Reduction

Jehad Abed, Ivan Grigioni, Talha Kose, Wajdi Alnoush, Sungjin Park, Annalisa Polo, Byoung-Hoon Lee, David Sinton, Drew Higgins, Edward H. Sargent

ACS Energy Letters· Volume 9· Issue 12

Abstract

To scale carbon dioxide reduction (CO 2 R), establishing a structure–property–performance relationship of the catalyst under the reaction conditions is a priority. Particularly in membrane electrode assembly (MEA) electrolyzers, knowledge about the valence state and coordination environment of the catalyst is of value yet limited. We developed an MEA electrolyzer that utilizes X-ray absorption spectroscopy to investigate the structural evolution of Cu 2 O-derived catalysts under CO 2 R and compare the same catalysts in a flow cell. Additionally, we study the influence of CO reduction and incorporating Ag on the reconstruction of the catalyst. We find that the strong reduction environment in the MEA and feeding CO leads to reconstruction of Cu 2 O particles, favoring higher coordination and lower oxidation states, which coincides with a shift in the reaction selectivity from C 2+ to hydrogen. Conversely, incorporating small amounts of Ag in the catalyst restricts the reconstruction. These findings advocate for in situ studies in zero-gap electrolyzers.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: CO2 Reduction Techniques and Catalysts · Advanced battery technologies research · Ionic liquids properties and applications

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

Affiliations

Department of Materials Science and Engineering, University of Toronto, 184 College Street, Toronto, Ontario M5S 3E4, Canada

Department of Electrical and Computer Engineering, University of Toronto, 35 St George Street, Toronto, Ontario M5S 1A4, Canada

The Alliance for AI-Accelerated Materials Discovery (A3MD),

Department of Chemistry, University of Milan, Via Camillo Golgi, 19, 20133 Milano, MI, Italy

Department of Mechanical and Industrial Engineering, University of Toronto, 5 King’s College Road, Toronto, Ontario M5S 3G8, Canada

Department of Chemical Engineering, McMaster University, 1280 Main Street West, Hamilton, Ontario L8S 4L7, Canada

Graduate School of Converging Science and Technology, Korea University, 145, Anam-ro, Seongbuk-gu, Seoul 02481, Republic of Korea

Funding

Universit? degli Studi di Milano · HORIZON EUROPE Marie Sklodowska-Curie Actions · Natural Sciences and Engineering Research Council of Canada

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