Probing changes in the structure and performance of a lithium nickel oxide catalyst by in situ X-ray diffraction during the high temperature oxidative coupling of methane


  • We thank the Science and Engineering Research Council for a studentship (to I J P), a fellowship (to P J M) and an equipment grant (to J M T).


The advantages of in situ X-ray diffraction in clarifying the onset and nature of the distinct kinds of catalytic action exhibited by a lithium nickel oxide for the oxidation of methane at elevated temperatures are demonstrated. Active solids may possess structural features quite unlike those deduced from measurements conducted at ambient temperatures and pressures emphasizing the need for the development of in situ methods.