Formation and Functioning of Bimetallic Nanocatalysts: The Power of X-ray Probes.
Matthias FilezEvgeniy A RedekopJolien DendoovenRanjith K RamachandranEduardo SolanoUnni OlsbyeBert M WeckhuysenVladimir V GalvitaHilde PoelmanChristophe DetavernierGuy B MarinPublished in: Angewandte Chemie (International ed. in English) (2019)
Bimetallic nanocatalysts are key enablers of current chemical technologies, including car exhaust converters and fuel cells, and play a crucial role in industry to promote a wide range of chemical reactions. However, owing to significant characterization challenges, insights in the dynamic phenomena that shape and change the working state of the catalyst await further refinement. Herein, we discuss the atomic-scale processes leading to mono- and bimetallic nanoparticle formation and highlight the dynamics and kinetics of lifetime changes in bimetallic catalysts with showcase examples for Pt-based systems. We discuss how in situ and operando X-ray spectroscopy, scattering, and diffraction can be used as a complementary toolbox to interrogate the working principles of today's and tomorrow's bimetallic nanocatalysts.
Keyphrases
- metal organic framework
- high resolution
- electron microscopy
- single molecule
- induced apoptosis
- highly efficient
- small molecule
- dual energy
- magnetic resonance
- computed tomography
- ionic liquid
- magnetic resonance imaging
- mass spectrometry
- signaling pathway
- cell cycle arrest
- crystal structure
- gold nanoparticles
- visible light
- contrast enhanced
- fluorescent probe
- iron oxide