at Google ScholarTitle data
Mette, Katharina ; Kühl, Stefanie ; Tarasov, Andrey ; Willinger, Marc G. ; Kröhnert, Jutta ; Wrabetz, Sabine ; Trunschke, Annette ; Scherzer, Michael ; Girgsdies, Frank ; Düdder, Hendrik ; Kähler, Kevin ; Ortega, Klaus Friedel ; Muhler, Martin ; Schlögl, Robert ; Behrens, Malte ; Lunkenbein, Thomas:
High-Temperature Stable Ni Nanoparticles for the Dry Reforming of Methane.
In: ACS Catalysis.
Vol. 6
(2016)
Issue 10
.
- pp. 7238-7248.
ISSN 2155-5435
DOI: https://doi.org/10.1021/acscatal.6b01683
Abstract in another language
Dry reforming of methane (DRM) has been studied for many years as an attractive option to produce synthesis gas. However, catalyst deactivation by coking over nonprecious-metal catalysts still remains unresolved. Here, we study the influence of structural and compositional properties of nickel catalysts on the catalytic performance and coking propensity in the DRM. A series of bulk catalysts with different Ni contents was synthesized by calcination of hydrotalcite-like precursors NixMg0.67-xAl0.33(OH)(2)(CO3)(0.17)center dot mH(2)O prepared by constant-pH coprecipitation. The obtained Ni/MgAI oxide catalysts contain Ni nanoparticles with diameters between 7 and 20 nm. High-resolution transmission electron microscopy (HRTEM) revealed a nickel aluminate overgrowth on the Ni particles, which could be confirmed by Fourier transform infrared (FTIR) spectroscopy. In particular, catalysts with low Ni contents (5 mol %) exhibit predominantly oxidic surfaces dominated by Ni2+ and additionally some isolated Ni-0 sites. These properties, which are determined by the overgrowth, effectively diminish the formation of coke during the DRM, while the activity is preserved. A large (TEM) and dynamic (microcalorimetry) metallic Ni surface at high Ni contents (50 mol %) causes significant coke formation during the DRM.
Further data
| Item Type: | Article in a journal |
|---|---|
| Refereed: | Yes |
| Additional notes: | WOS:000385057900110 |
| Institutions of the University: | Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry Faculties Faculties > Faculty of Biology, Chemistry and Earth Sciences Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Operando-Analytics of Electrochemical Energy Storage > Chair Operando-Analytics of Electrochemical Energy Storage - Univ.-Prof. Dr. Thomas Lunkenbein Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Operando-Analytics of Electrochemical Energy Storage |
| Result of work at the UBT: | No |
| DDC Subjects: | 500 Science > 540 Chemistry |
| Date Deposited: | 13 Jun 2025 08:28 |
| Last Modified: | 04 Jul 2025 11:32 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/93726 |