The specific surface area, average pore radius and average particle size of MoVO_x catalysts doped with different content of Ce.

Catalyst	S BET a (m2 g−1)	D P a (nm)	Average grain sizeb (nm)
Ce-0	7.035	26.01	2699.92
Ce-0.02	5.391	47.80	2573.83
Ce-0.05	6.779	29.79	2523.08
Ce-0.10	4.828	67.12	2124.37
Ce-0.20	5.414	39.99	2062.57
Ce-0.33	4.458	31.55	1287.89

^aCalculated by BET analysis.

^bCalculated from XRD data using Scherrer formula.