Preparation of Palladium-Impregnated Ceria by Metal Complex Decomposition for Methane Steam Reforming Catalysis

Table 1

Crystallite size calculated by Scherrer equation according to the XRD patterns, percentage of different chemical states of the Pd-based species according to the Pd 3d XPS spectra, and specific surface area derived from BET calculation of N₂ adsorption isotherm at 77 K () of the obtained Pd-impregnated ceria catalysts.

Pd-impregnated ceria catalysts	FWHM	Crystallite size (nm)	% of Pd-based species
	(degree)		Pd^2+	()	(m^2/g)
1Pd-CeO2-T-Cl	0.28328	30.20	—	—	17.22
3Pd-CeO2-T-Cl	0.28363	30.16	76.6	23.4	17.70
1Pd-CeO2-T-N	0.49834	17.17	—	—	14.30
3Pd-CeO2-T-N	0.39466	21.68	75.7	24.3	11.42
1Pd-CeO2-B-N	0.77191	11.10	—	—	62.89
3Pd-CeO2-B-N	0.70906	12.07	70.0	30.0	57.01