Table 2. Textural Properties and Metal Content Determined by X-ray Fluorescence and X-ray Photoelectron Spectroscopy for the Prepared Catalysts and Brønsted Acid Sites Determined by Titration of the Prepared Catalysts.

	Sn-In-MCM-41	Sn-MCM-41	In-MCM-41
BET surface area [m2·g–1]	899 ± 15	1034 ± 14	978 ± 25
pore volumea [cm3·g–1]	0.42	0.48	0.48
pore diameter (4 V/A)b [nm]	1.9	1.9	2.0
pore diameter (BJH) [nm]	2.0	2.1	2.3
pore diameter (DFT) [nm]	1.8	1.8	2.1
d100 as synthesized [Å]	40	40	36
d100 calcined [Å]	25	26	28
primary mesopore volumec [cm3·g–1]	0.29	0.34	0.34
pore diameterc [nm]	1.9	2.0	2.2
Sn XRF (wt %)	1.88 ± 0.04	4.71 ± 0.09
In XRF (wt %)	1.22 ± 0.02		2.49 ± 0.08
atomic Si/Sn gel	150	75
atomic Si/In gel	150		75
In/(In + Sn) gel	0.50	0	1
atomic Si/Sn XRF	101	40
atomic Si/In XRF	151		74
In/(In + Sn) XRF	0.40	0	1
atomic Si/Sn XPS	52	28
atomic Si/In XPS	23		22
In/(In + Sn) XPS	0.69
Brønsted acid sites [mmol·g–1]	0.117 ± 0.002	0.123 ± 0.002	0.128 ± 0.002
mmol ac/mmol metal	0.44	0.31	0.59

^aAt P/P₀ = 0.97.

^bFrom BET data.

^cFrom Kruk et al.⁵⁴