C09N

The chemical potential of iron (μ_Fe) in intermetallic compounds and μ_O in the gas phase during the oxidative dehydrogenation of ethanol are used as quantitative guides to determine the required stability of the compounds. The necessary isopotential operando XRD with quantitative μ_O determination, as well as the materials themselves, are being developed within the project. Through the simultaneous operando measurement of material changes and μ_O, validated structure-reactivity relationships are established, and the chemical potential is established as a guide in materials development.