Evidence of Surface Properties by Isopropanol Decomposition Reaction and NH ₃ ‐TPD over Ni−Fe Spinel Nanoparticles Prepared <i>via</i> Hydrothermal Route

In this work, surface properties evaluated by catalytic conversion of isopropanol and ammonia Temperature Programmed Reduction (NH3-TPD) over ferrite spinel nanoparticles was investigated. Bulk NiFe2O4 with specific area 114 m2/g crystallites size 6 nm prepared hydrothermal synthesis using nitrates as precursors. X-ray diffraction (XRD), Raman spectroscopy, B.E.T, Scanning Electron Microscopy (SEM) energy dispersive microanalysis (EDS), Transmission (TEM) Photoelectron Spectroscopy (XPS) techniques were used for their structural textural characterizations. The reducibility hydrogen at variable temperatures investigated reduction (H2-TPR) Thermal Gravimetric Analysis- Differential Calorimetry (TGA-DSC). total acidity acid strength distribution determined NH3-TPD. synthesized oxide showed the presence mixed phases containing inverse structure major phase iron α-Fe2O3 an additional phase. It shown that powder richer in Ni2+ species. (Brönsted Lewis) NH3-TPD number acidic sites increased dramatically temperature. yields both redox/basic available. A good correlation between textural, structural, redox acid-base catalyst is established.