Synthesis of layered perovskites type An+1BnX3n+1 (A=Sr/Mg; B=Ni/Fe; X=O) via SCS with Catalytic Activity in dry Methane Reforming

This research has managed to prepare mixed oxides type perovskites in layers type A(n+1)B(n)O(3n+1) (A= Sr and Mg; B= Co and Ni; X=O) via solution combustion synthesis (SCS), in the presence of microwave radiation. These materials were characterized using Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (RDX). The spectroscopic study shows the signals corresponding to M-O interactions at low wavelengths. X-ray diffraction identified the phase of a layered perovskite type La2NiO4 (tetrahedral) with n=1, formed during fuel combustion. This technique also allowed us to calculate the size of the crystalline domain (Eq. Scherrer), with values below 20nm for all the synthesized solids. High catalytic activity was found in the dry methane reforming reaction, where all perovskites show good thermal stability and resistance to sintering and deactivation by carbon deposition. The best solid was P/NiFe-3 with 62% methane conversion.