Mixed oxide preparation by ultrasonic assisted method. Toward hydrogen production via CO2 reforming of methane

The synthesis method is definitive to tune the physicochemical properties for catalytic materials. In this work, the preparation of Ni-Co-Mg-Al-La mixed oxide derived from layered doubles hydroxides (LDH) phases is reported. The synthesis of Ni-Co-Mg-Al-La (LDH) was studied by co-precipitation and under sonication media. X-ray patterns of the samples prepared by ultrasound showed the incorporation of lanthanum ions within the hydrotalcite based structure, while the specific surface areas of samples prepared by the ultrasound method are showing an increasing with 25 % by comparison with the classic procedure. Due to the better textural and structural properties, the catalysts prepared by ultrasound shows an enhancement of the catalytic activity (CO2 of 90% and CH4 of 87%) toward dry reforming of methane.