Аннотация:Solid solutions Nd2-xSrxNiO4d (x = 0, 0.5, 1, 1.2, 1.4) with a K2NiF4 structure can beobtained from freeze-dried precursors. The end members of this series can be obtained at T > 1000 C only, while complex oxides with x = 1; 1.5 are formed at T > 700 C. Thermal analysis revealed thetwo stages of Nd2xSrxNiO4d thermal reduction in a 10%H2/Ar gas mixture that was completedat 900 C. For x < 0.2, the reduction products demonstrated an exsolution-like morphology with Ninanoparticles allocated at the surface of oxide grains. As-obtained nanocomposites with x = 0 andx > 1 revealed the outstanding catalytic activity and selectivity in the dry reforming of the methane(DRM) reaction at 800 C with CH4 conversion close to the thermodynamic values. The appearanceof two different maxima of the catalytic properties of Ni/(Nd2O3,SrCO3) nanocomposites could be affiliated with the domination of the positive contributions of Nd2O3 and SrCO3, respectively.
