We are very happy that you are studying green hydrogen for feature energy source from ammonia. Ammonia synthesis is the catalytic exothermic reaction, the thermal decomposition of ammonia to hydrogen and nitrogen is an inverse reaction and endothermic reaction. Potassium-promoted ruthenium- and nickel-based supported on CaO is a very efficient catalyst for ammonia decomposition, surpassing the performance of other Ru-supported solids. an ammonia cracker is used the process runs at temperatures of 600-900 °C and a pressure of 50-100 bar. The product is then cooled and the residual by-products are separated out to obtain a pure hydrogen stream.For ammonia decomposition a pressure vessel is required to retain the pressure up to 150 bar and heating system must be there before fed to reactor.

https://www.nature.com/articles/s41467-019-11848-9

https://pubs.acs.org/doi/10.1021/acs.iecr.1c00843

You have a catalyst supposed to be used at high pressure and high temperatures. You can do a lot of different characterisation methods. Compare the results with published results. But You will get just indications that the catalyst might be functional. For real verification You need a reactor. Try find a partner where You can make some test runs.

Testing a catalyst for ammonia decomposition is crucial for ensuring its efficiency and stability. Ammonia (NH₃) can be thermocatalytically decomposed to produce clean hydrogen (H₂), which is a promising alternative fuel. Here are some steps you can take to test your catalyst:

Good luck