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ATOMic Insight Cavity Array Reactor

Periodic Reporting for period 2 - ATOMICAR (ATOMic Insight Cavity Array Reactor)

Reporting period: 2019-08-01 to 2021-01-31

"ATOMICAR is a project to advance the art of catalytic measurements to the point where we can hope to answer the ultimate question in nanoparticle catalysis:
""How does the catalytic activity of a specific nanoparticle in a specific reactive environment correlate to its specific composition, size and shape?""

If we could answer this question, we could design super-optimized nanoparticles for a given reaction. Such an optimized catalyst would have maximum activity (so that the smallest possible amount of the catalyst is needed which saves precious resources) while ensuring near perfect selectivity (so that only the desired product is made and undesirable bi-products are avoided). The main target application for such technology is energy storage and transformation reactions for a future renewable energy infrastructure."
"Since the start of the project we have developed (from scratch) experimental facilities and methodology in order to start catalytic measurements on single, isolated nanoparticles. We have designed and fabricated Cavity Array Reactor (CAR) chips with micron-size cavities, which we seal gas-tight using 2-dimensional ""sheets"" of material.
We study the surface of he 2-dimensional material using Atomic Force Microscopy (AFM) in a custom setup, which we have established as part of the project.
We have made such CARs in a special version where the floor of the cavity is only a few tens of nanometers thick which makes it transparent to the electron beam in a Transmission Electron Microscope (TEM). Finally, we have built a laser-setup to study the mechanical properties of the 2-dimensional ""sheets""."
The main results beyond the state of the art is that
1) we have discovered a new regime for how gas behaves in the 2-dimensional sheet/CAR chip interface, and
2) we have developed a new spectroscopic technique for measuring the chemical state of the CAR chip in a TEM.

These are baby steps towards the larger project goals which include seeking out nanoparticle configurations of extraordinary catalytic activity and the study of non-trival ensemble phenomena such as activity oscillations and sintering kinetics.