Recently methane has become a focus point in the frontier against global warming. It is abundantly released into the atmosphere via dilute streams where its capture is uneconomical with existing technology. Reactive capture of methane, converting it to oxidation products like methanol, or the much less powerful greenhouse gas CO2, is an emerging strategy. For this, copper and iron supported on zeolites are promising catalysts. On the zeolite support, copper and iron form highly reactive oxygen species capable of such reactive capture. The supervisors of this project are among the key specialists on these copper and iron zeolites and their reaction with methane. Our past research, and most of the literature has, however, focused strongly on single oxidation steps on well defined copper and iron centres. To develop performant catalysts, a broader view on kinetics and steady state phenomena is needed. To achieve this, more advanced techniques for operando and kinetic investigation must be developed and used. This project will develop the needed transient response, modulation excitation, and pulsed experiments and uniquely couple them to advanced in situ electronic spectroscopies. Then we will use them to clarify the sequential steps of methane oxidation via intermediate oxidation products all the way to CO2. New syntheses will be developed to break away from the well know individual copper and iron zeolites into optimised perfomant catalysts, enabling new catalyst discovery.