Synthesis of a NiFe_2O_4 catalyst for the preferential oxidation of carbon monoxide (PROX)

摘要

The aim of this work was to study the NiFe_2O_4 spinel catalyst obtained by combustion reaction in the preferential oxidation of carbon monoxide reaction to conversion reactants H_2, CO and O_2 and to conversion products CH_4, H_2O and CO_2. The powders were prepared according to propellants chemical concept and characterized by XRD, TEM and catalytic tests. The XRD pattern shows the characteristic peaks of the spinel phase. The particle size calculated by TEM was 10.7 nm. The catalyst proved to be more selective to reagents for conversion into O_2 (89.5%) at 350 ℃.