From CO 2 to Solid Carbon: Reaction Mechanism, Active Species, and Conditioning the Ce-Alloyed GaInSn Catalyst
Year: 2024
Type: article
Abstract: High Resolution Image Download MS PowerPoint Slide The electrochemical reduction of CO 2 is a promising realization of negative emissions to mitigate climate change, aiming at the efficient production and safe long-term storage of carbon-rich sink products. This approach, however, necessitates novel catalyst materials specifically targeting electrochemical carbon dioxide removal. In this work, we investigate synthesis routes for a cerium-incorporated GaInSn-based liquid metal catalyst, focusing on the electrochemical production of graphitic carbon. Preparation and preconditioning of the catalyst are found to be crucial for carbon production, while trace amounts of H 2 O and OH in the organic electrolyte play a decisive role in the efficiency of the electrocatalytic process. Finally, for a better understanding of the reaction mechanism and the involved active species, experimental findings and density functional theory-based calculations are combined, suggesting a two-step reduction pathway with Ce(OH) x as the catalytically active surface species.
Authors: Daniel Lörch, Aya G. A. Mohamed, Holger Euchner, Janick Timm, Jonas Hiller, Peter Bogdanoff, Matthias M. May
Language: English
Field: Energy
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $4,500
Awards: Verbundprojekt CDR: Negative Emissionen mittels photoelektrochemischer Methoden (NETPEC) - Teilprojekt 1: Einfluss des Lokalklimas auf Produktion und Speicherung der Kohlenstoffprodukte und Analyse der Katalysator-Eigenschaften, Verbundprojekt CDR: Negative Emissionen mittels photoelektrochemischer Methoden (NETPEC) - Teilprojekt 2: Entwicklung neuartiger Elektrokatalysatoren, G402306430, Aufklärung der potenzialabhängigen Struktur von elektrochemischen Grenzflächen mittels Reflexionsanisotropiespektroskopie
OpenAlex ID: W4404790241