Bronze Age of Direct Mechanocatalysis: How Alloyed Milling Materials Advance Coupling in Ball Mills. Issue 5 (27th March 2021)

• Record Type: Journal Article
• Authors: Vogt, Christian G.; Oltermann, Maike; Pickhardt, Wilm; Grätz, Sven; Borchardt, Lars
• Is Part Of: Advanced energy & sustainability research. Volume 2:Issue 5(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-03-27
• Subjects: alloys -- Glaser coupling -- heterogeneous catalysis -- mechanochemistry -- sustainable chemistry; Renewable energy sources -- Periodicals; Environmental sciences -- Periodicals; Sustainable development -- Periodicals; 621.042
• DOI: 10.1002/aesr.202100011
• Languages: English
• ISSNs: 2699-9412

Abstract

Abstract : The copper‐catalyzed Glaser coupling is conducted mechanochemically, with the milling balls and vessels being the catalyst. Thus, neither catalyst powders nor soluble catalyst salts are required. Substituting Cu 0 milling tools by copper alloys not only increases the yield of the reaction, but also greatly reduces abrasion, and in turn increases catalyst long‐term stability and reusability. Tracking the reaction by Raman spectroscopy allows to identify the active intermediate directly on the milling ball surface and propose a reaction mechanism. Abstract : The milling ball is the catalyst — cupreous milling materials facilitate mechanocatalytic Glaser coupling of terminal alkynes toward 1, 3‐butadiynes. Alloys outperform pure copper not only in terms of yield but rather in outstanding long‐term stability and reusability. For the first time, the presence of reaction intermediates directly on the surface of the catalytically active milling balls is shown.