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

doi:10.1021/acsami.2c23007

機構典藏 > College of Sciences > Graduate Institute & Department of Physics > Journal Article > Item 987654321/125596

Please use this identifier to cite or link to this item: https://tkuir.lib.tku.edu.tw/dspace/handle/987654321/125596

Title:	Assessment of the Degradation Mechanisms of Cu Electrodes during the CO2 Reduction Reaction
Authors:	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, and Juan-Jesús Velasco-Vélez
Keywords:	CO2RR, copper degradation, in situ EC-SEM, in situ X-ray spectroscopy, long-term reactions, electrocatalysis
Date:	2023-06-15
Issue Date:	2024-07-30 12:06:40 (UTC+8)
Publisher:	American Chemical Society
Abstract:	Catalyst degradation and product selectivity changes are two of the key challenges in the electrochemical reduction of CO2 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 CO2 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 CO2 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 CO2 into hydrocarbons and oxygenated products.
Relation:	ACS Applied Materials & Interface 15(25), p.30052-30059
DOI:	10.1021/acsami.2c23007
Appears in Collections:	[Graduate Institute & Department of Physics] Journal Article

Files in This Item:

File	Description	Size	Format
index.html		0Kb	HTML	41	View/Open

Loading...