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
Subnanoporous Hydrophobic Thin Films for Ultrahigh-Efficiency Seawater and Brines Desalination Using Membrane Distillation
by
Obaid, Soukane, Qtaishat, Zhang, Guillerm, Mohamed, Ayach, Singaravelu, Castaño, Maurin, Eddaoudi, Matsuura, Ghaffour
Nature Comm.
Year:
2026
DOI:
https://doi.org/10.1038/s41467-025-68158-6
Abstract
Fabricating breakthrough materials capable of desalinating seawater and brine with high selectivity and low energy consumption is crucial for addressing global water and energy challenges. We report here the desalination capability of ultra-thin polymeric films with subnanometer pores synthesized through the polymerization of fluorinated trichlorosilane monomers and diamine-based monomers. The combination of subnanometer pore size, submicron thickness, and superhydrophobicity facilitates efficient liquid-to-vapor phase change in the membrane distillation process, enabling effective desalination performance. The thin-films demonstrate high salt rejection (99.8%), complete boron rejection, and water fluxes of 40 L.m−2.h−1 (1.88 kWh.m−3, WRRsp 0.32%) and 238 L.m−2.h−1 (20.65 kWh.m−3, WRRsp 3.87%) for seawater at 25 °C and 60 °C, respectively. For the desalination of real seawater reverse osmosis brine at 25 °C, the thin-films maintain 12 L.m−2.h−1 (4.4 kWh.m−3, WRRsp 0.09%) under comparable conditions. Their polymeric nature, chlorine resistance, and low energy requirements, indicate a potential for scalable and sustainable desalination systems.
Keywords
HCE