Operando XANES/EXAFS and XRD measurements on supported NiGa@GaOx catalysts are proposed to confirm the presence of metastable gallium hydrides (observed when feeding H2) as novel active centres during the propane dehydrogenation to propene reaction and which are suspected to significantly enhance the catalytic performance. In particular a combined edge measurement will help to determine the coexistence of a NiGa phase with a GaOx phase at elevated/operational temperatures under reaction conditions to understand the significance of this multi-phase composition on performance.