화학공학소재연구정보센터
Journal of Molecular Catalysis A-Chemical, Vol.221, No.1-2, 77-80, 2004
The effect of K and Al over NiCo(2)O(4)catalyst on its character and catalytic oxidation of VOCs
NiCo2O4, K-NiCo2O4, and Al-NiCo2O4 spinel oxides were prepared by co-precipitated method. The properties of these three samples were investigated by X-ray powder diffraction (XRD), temperature-programmed reduction (TPR), Brunauer-Emmett-Teller (BET) measurement, and X-ray photoelectron spectroscopy (XPS) technologies. The catalytic activity of volatile organic compounds (VOCs) oxidation was found to be decreased after adding aluminum and increased after adding potassium in NiCo2O4 sample. The small particle size of NiCo2O4 was responsible for VOCs oxidation. The potassium was the most effective in promoting NiCo2O4 sample in reducibility and surface area. XPS analysis indicated that the electrophonic oxygen species on the catalyst surface is the main active oxygen and plays an important role in total oxidation of VOCs. (C) 2004 Elsevier B.V. All rights reserved.