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 |
| URN: | urn:nbn:de:bsz:291:415-1298 |
| DOI: | https://doi.org/10.1002/cctc.202100562 |
| Parent Title (English): | ChemCatChem |
| Volume: | 13 |
| Issue: | 14 |
| First Page: | 3257 |
| Last Page: | 3261 |
| Language: | English |
| 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 |
| Scientific Units: | Innovative Electron Microscopy |
| DDC classes: | 500 Naturwissenschaften und Mathematik / 540 Chemie |
| Open Access: | Open Access |
| Signature: | INM 2021/060 |
| Licence (German): |  Creative Commons - CC BY - Namensnennung 4.0 International |
