Encapsulated Cobalt Oxide on Carbon Nanotube Support as Catalyst for Selective Continuous Hydrogenation of the Showcase Substrate 1‐Iodo‐4‐nitrobenzene. Issue 18 (24th August 2016)

• Record Type: Journal Article
• Authors: Baramov, Todor; Loos, Patrick; Hassfeld, Jorma; Alex, Hannes; Beller, Matthias; Stemmler, Tobias; Meier, Gregor; Gottfried, Michael; Roggan, Stefan
• Is Part Of: Advanced synthesis & catalysis. Volume 358:Issue 18(2016)
• Page Start: 2903
• Page End: 2911
• Publication Date: 2016-08-24
• Subjects: flow chemistry -- heterogeneous catalysis -- hydrogenation -- nitroarenes -- supported catalysts; Catalysis -- Periodicals; Organic compounds -- Synthesis -- Periodicals; Chemistry -- Periodicals; Chemistry, Technical -- Periodicals; Chemistry -- Periodicals; Catalysis -- Periodicals; Technology, Pharmaceutical -- Periodicals; 547.2
• DOI: 10.1002/adsc.201600461
• Languages: English
• ISSNs: 1615-4150

Abstract

Abstract: A carbon nanotube supported catalyst containing cobalt/cobalt oxide (Co/Co3 O4 ) nanoparticles encapsulated within a shell of nitrogen‐doped graphene layers (Co3 O4 /NGr@CNT) was prepared. It shows excellent chemoselectivity in the hydrogenation of 1‐iodo‐4‐nitrobenzene, which contains an iodine substituent highly sensitive against hydrodehalogenation. In contrast to traditional activated charcoal‐supported catalysts such as Pt‐V/C or the closely related Vulcan carbon black supported Co3 O4 /NGr@C, the advantageous morphological properties of the CNT support allow for the application of the new Co3 O4 /NGr@CNT as a fixed bed catalyst in a continuous flow reactor. Under optimized conditions, no dehalogenation side products could be detected. This remarkable selectivity in combination with its mechanical stability under operation conditions render Co3 O4 /NGr@CNT a catalyst particularly relevant for application in continuous processes based on a packed bed reactor. Abstract :