1. NiCo 2 O 4 spinel for efficient toluene oxidation: The effect of crystal plane and solvent.
- Author
-
Niu J, Liu H, Zhang Y, Wang X, Han J, Yue Z, and Duan E
- Subjects
- Adsorption, Catalysis, Cold Temperature, Oxidation-Reduction, Oxides chemistry, Oxygen chemistry, Solvents, Aluminum Oxide chemistry, Magnesium Oxide chemistry, Toluene chemistry
- Abstract
Spinel oxides, e.g., NiCo
2 O4 , is a promising catalyst for the catalytic oxidation of toluene. Understanding and designing versatile NiCo2 O4 spinel is important for low-temperature toluene oxidation. Here, we investigated the surface-characteristic-dependent degradation activity of NiCo2 O4 crystals through experiment and characterization. NiCo2 O4 nanosheet using ethanol as solvent (named E--NiCo2 O4 ) exposing {110} crystal planes exhibited the lowest temperature toluene oxidation. The T99 of toluene conversion was 256 °C, which is much lower than that of NiCo2 O4 nanosheet using ethylene glycol as solvent (named EG--NiCo2 O4 ), NiCo2 O4 octahedron (named O--NiCo2 O4 ) and NiCo2 O4 truncated octahedron (named TO--NiCo2 O4 ). Characterization using various techniques such as XRD, TEM, BET, XPS, H2 -TPR and CO2 -TPD showed that Co3+ and surface adsorbed oxygen (Osur ) enriched surface, excellent redox properties and effective diffusion of the reaction product reasonably explain the enhancement in catalytic activity over the E--NiCo2 O4 . The research reveals that the effect of specific crystal planes and solvent was the key factor to govern the activity of low-temperature toluene oxidation., (Copyright © 2020 Elsevier Ltd. All rights reserved.)- Published
- 2020
- Full Text
- View/download PDF