ESRF X-ray imaging looks inside the platinum in catalytic converters

Researchers at Irig* leveraged ESRF X-ray imaging, simulation, and a neural network algorithm to characterize the deformations in platinum nanoparticles similar to those used in catalytic converters—a first.
The in operando observations were completed on model particles in contact with carbon dioxide, and measurements were taken on a cycle over twelve hours. The observations and measurements resulted in the identification of two types of defects: rearrangements of atoms in the platinum crystals, and the formation of flat facets on previously rounded areas.
Now the researchers are working on assessing the defects’ impact—positive or negative—on the reaction. The results should lead to engineering work to improve catalytic converter efficiency.

Contact: marie-ingrid.richard@cea.fr

*With other researchers from France, Israel, and the Netherlands

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