Synthesis of a NiFe2O4 catalyst for the preferential oxidation of carbon monoxide (PROX)

Abstract

The aim of this work was to study the NiFe2O4 spinel catalyst obtained by combustion reaction in the preferential oxidation of carbon monoxide reaction to conversion reactants H2, CO and O2 and to conversion products CH4, H2O and CO2. 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 O2 (89.5%) at 350 °C.