| 摘要 |
The present invention aims to provide a honeycomb catalyst that includes titanium oxide, vanadium oxide, and tungsten oxide, and exhibits sufficient NOx conversion ability although it contains a small amount of vanadium oxide. The honeycomb catalyst of the present invention contains: titanium oxide; vanadium oxide; and tungsten oxide, the honeycomb catalyst containing the vanadium oxide in an amount of 0.3 to 5.0 wt%, a peak attributable to a vanadium atom being spaced by an interatomic distance of 2.4 to 2.5 Å from a tungsten atom in a radial distribution function, the intensity of the peak being 0.05 Å or more in the radial distribution function per 1 wt% of the amount of the vanadium oxide in the honeycomb catalyst, the radial distribution function being obtained by Fourier transformation of an extended X-ray absorption fine structure (EXAFS) spectrum in a K-absorption edge of the tungsten in the honeycomb catalyst. |
