Heterogeneous catalyst engineering ⇒ from stable and deactivation resistant to viable technical catalyst
Advances in heterogeneous catalyst “structure” are driven to improve their “function” or performance, i.e., activity, selectivity, and stability. Cooperative research is required to understand the structure and function relationships: developing new synthesis protocols for heterogeneous catalysts with unique surface properties, defined porosity, identification and understanding of catalytically active sites, reaction mechanisms, and finally, prediction and analysis of the processes using various computational tools.
Our group focuses on developing new catalyst formulations using innovative synthesis routes for various important heterogeneous catalysts. That includes thermal, electro, and bio-electro catalysis.
The active phase cannot be used directly in its final application or reactor for various reasons, including poor mechanical resistance, heat or mass transport, and fluidization features. We must mix the active phase with other ingredients in a matrix of binder and filler, while we shape it into a technical catalyst. We investigate new synthetic protocols for technical catalysis using spray drying and fluidized beds to cover the whole range of sizes. At the same time, we incorporate additional (unconventional) ingredients such as SiC to improve some features even further.
- Technical catalyst I ⇒ spray drying and extrusion
- Technical catalyst II ⇒ spray fluidized bed reactor
- Technical catalyst III ⇒ electrospinning
- Zeolite catalysts ⇒ with defined structure/porosity
- Multi-metal (high entropy) alloy catalysts
- MXene catalysts ⇒ single and multi-dimensional
- Perovskite catalysts
- Metal-organic framework (MOFs) catalysts
- Supported metal/metal-oxide catalysts
- Aerogel catalyst
Mitigating Coking in Ni-Based Catalyst for Dry Reforming Through Dynamic Modulations and High-Entropy Alloys
by
Bai, Mohamed, Yao, Velisoju, Melinte, Davaasuren, Hedhili, Telalovic, Castaño
Appl. Catal. B: Environ.
Year:
2026
DOI:
https://doi.org/10.1016/j.apcatb.2026.126900
Abstract
Ni-based alloy catalysts undergo dynamic structural changes during the dry reforming of methane (DRM), which impact their activity, stability, and resistance to coke formation. We systematically investigate the structural dynamics of La2O3-supported monometallic Ni, quaternary FeCoNiCu, and quinary FeCoNiCuMo catalysts, correlating these changes with catalyst properties and DRM performance. The quinary FeCoNiCuMo catalyst exhibits superior catalytic stability and coke resistance compared to the quaternary and monometallic Ni catalysts during 30 h on stream at 700 °C. Advanced dynamic characterizations reveal that multi-metallic alloying enhances coke oxidation by accelerating La2O3 ↔ La2O2CO3 redox cycling, increasing the concentration and mobility of active oxygen, and improving CO2 activation. These effects suppress CH4 decomposition by diluting Ni sites. This dual functionality establishes a self-sustaining redox cycle that balances coke formation and oxidation, accounting for the exceptional coke resistance observed in the high-entropy FeCoNiCuMo alloy catalyst. These findings provide fundamental insights into designing stable, coke-resistant DRM catalysts through controlled structural modulation and operando characterization under realistic conditions.
Keywords
HCE
CRE
CHA