New Simulation Tool Reveals Hidden Pathways in Catalytic Reactions

A research team at Heinrich Heine University Düsseldorf (HHU) has created a new simulation tool to study nitrogen oxide conversion. The method, called periodic nanoreactor molecular dynamics, uncovers hidden reaction pathways in catalytic processes. It could lead to more efficient and cleaner catalytic converters in the future.

The HHU chemists developed the Nanoreactor Molecular Dynamics (NMD) method to explore how nitrogen oxides break down in porous catalytic materials. Unlike traditional approaches, this tool uses quantum mechanical calculations to predict reaction rates and detect rare chemical events. When applied to selective catalytic reduction (SCR) of nitrogen oxides, it revealed a previously unknown radical-driven route for nitrous oxide (N₂O) formation.

The method doesn't rely on prior chemical assumptions, allowing researchers to map out full reaction networks automatically. Beyond nitrogen oxide reduction, it shows promise in sustainable chemistry, low-emission industrial processes, and the design of new catalysts. The team also highlighted its potential for studying reactions in other porous systems, such as metal-organic frameworks (MOFs) and surface-based catalysts. In the long run, the approach could speed up catalyst development by identifying key reaction pathways early. This would reduce trial-and-error testing and help engineers create more effective emission control technologies.

The NMD method offers a new way to analyse complex catalytic reactions without pre-existing models. Its ability to uncover hidden mechanisms may improve the efficiency of pollution-reducing technologies. The findings have been published, but further research will determine their real-world applications.