Screening Surface Structure-Electrochemical Activity Relationships of Copper Electrodes under CO2 Electroreduction Conditions was written by Wahab, Oluwasegun J.;Kang, Minkyung;Daviddi, Enrico;Walker, Marc;Unwin, Patrick R.. And the article was included in ACS Catalysis in 2022.Name: Cuprichydroxide This article mentions the following:
Understanding how crystallog. orientation influences the electrocatalytic performance of metal catalysts can potentially advance the design of catalysts with improved efficiency. Although single crystal electrodes are typically used for such studies, the 1-at-a-time preparation procedure limits the range of secondary crystallog. orientations that can be profiled. This work employs scanning electrochem. cell microscopy (SECCM) together with co-located electron backscatter diffraction (EBSD) as a screening technique to study how surface crystallog. orientations on polycrystalline Cu correlate to activity under CO2 electroreduction conditions. SECCM measures spatially resolved voltammetry on polycrystalline Cu covering low overpotentials of CO2 conversion to intermediates, thereby screening the different activity from low-index facets where H2 evolution is dominant to high-index facets where more reaction intermediates are expected. This approach allows the acquisition of 2500 voltammograms on ∼60 different Cu surface facets identified with EBSD. The order of activity is (111) < (100) < (110) among the Cu primary orientations. The collection of data over a wide range of secondary orientations leads to the construction of an electrochem.-crystallog. stereog. triangle that provides a broad comprehension of the trends among Cu secondary surface facets rarely studied in the literature, [particularly (941) and (741)], and clearly shows that the electroreduction activity scales with the step and kink d. of these surfaces. This work also reveals that the electrochem. stripping of the passive layer that is naturally formed on Cu in air is strongly grain-dependent, and the relative ease of stripping on low-index facets follows the order of (100) > (111) > (110). This allows a procedure to be implemented, whereby the oxide is removed (to an electrochem. undetectable level) prior to the kinetic analyses of electroreduction activity. SECCM screening allows for the most active surfaces to be ranked and prompts in-depth follow-up studies. In the experiment, the researchers used many compounds, for example, Cuprichydroxide (cas: 20427-59-2Name: Cuprichydroxide).
Cuprichydroxide (cas: 20427-59-2) belongs to copper catalysts. Transition metal-catalyzed chemical transformation of organic electrophiles and organometallic reagents belong to the most important cross-coupling reaction in organic synthesis. These ligands enable the reaction promoted in mild condition. The reaction scope has also been greatly expanded, rendering this copper-based cross-coupling attractive for both academia and industry. Name: Cuprichydroxide
Referemce:
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”