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Key Parameters for the Synthesis of Active and Selective Nanostructured 3d Metal Catalysts Starting from Coordination Compounds – Case Study: Nickel Mediated Reductive Amination

  • Abstract The design of nanostructured catalysts based on earth-abundant metals that mediate important reactions efficiently, selectively and with a broad scope is highly desirable. Unfortunately, the synthesis of such catalysts is poorly understood. We report here on highly active Ni catalysts for the reductive amination of ketones by ammonia employing hydrogen as a reducing agent. The key functions of the Ni-salen precursor complex during catalyst synthesis have been identified: (1) Ni-salen complexes sublime during catalyst synthesis, which allows molecular dispersion of the metal precursor on the support material. (2) The salen ligand forms a nitrogen-doped carbon shell by decomposition, which embeds and stabilizes the Ni nanoparticles on the γ-Al2O3 support. (3) Parameters, such as flow rate of the pyrolysis gas, determine the carbon supply for the embedding process of Ni nanoparticles.

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Document Type:Article
Author:Mara Klarner, Patricia S. Blach, Haiko WittkämperORCiD, Niels de JongeORCiD, Christian PappORCiD, Rhett KempeORCiD
Parent Title (English):ChemCatChem
First Page:3257
Last Page:3261
Year of first Publication:2021
Release Date:2022/08/18
Tag:Coordination compounds; N-doped carbon; Ni catalyst; Reductive amination; Sustainable catalysis
Impact:05.497 (2021)
Funding Information:German Research Foundation. Grant Number: DFG SFB 840, B1; Bavarian Polymer Institute; Elite Network Bavaria
Research Departments:Innovative Elektronenmikroskopie
DDC classes:500 Naturwissenschaften und Mathematik / 540 Chemie
Open Access:Open Access
Signature:INM 2021/060
Licence (German):License LogoCreative Commons - CC BY - Namensnennung 4.0 International