Table 1. Crystal Size and Textural Properties of the Calcined and Reduced Catalysts.

	crystal size (nm)
	calcined		reduced
catalyst	NiOa	CeO2c	Nib	CeO2c	SBET(m2/g)	VT (cm3/g)
Ni/CeO2	17.6	16.4	18.9	27.9	132	0.061
Na–Ni/CeO2	20.4	21.2	37.9	34.9	113	0.051
K–Ni/CeO2	17.5	18.5	28.3	34.9	106	0.046
Cs–Ni/CeO2	20.5	21.2	28.3	34.9	101	0.042

^aCalculated using the NiO(200) diffraction plane.

^bCalculated using the Ni⁰(111) diffraction plane.

^cCalculated using the CeO₂(111) diffraction plane.