Operando XAFS/XRD studies of Ni-containing mixed metal perovskites to identify active and deactivated ex-soluted Ni species

The aim of this work is to investigate using combined XAFS/XRD under operando conditions the nature and type of Ni species (oxidation state of Ni and its location on the perovskite A or B sites) that are present in the mixed-metal perovskite catalysts LaTi1-xNixO3 and LaFe1-xNixO3, the nature of the Ni species that form during initial reduction (fully or partially reduced Ni metal), under reaction conditions and after regeneration. The results obtained will aid in the design of new catalysts for dry methane reforming, which is of major industrial interest.