Selective oxidation of toluene to benzaldehyde in liquid phase over
CoAl oxides prepared from hydrotalcite-like precursors
Weiyou Zhou · Ke Huang · Mingming Cao · Fu’an Sun · Mingyang He · Zaixin Chen
Techniques
Powder X-ray diffraction (XRD) patterns of the as-synthesized samples were obtained using a Rigaku D/max
2500 PC X-ray diffractometers with Cu-Kα (1.5402 Å) radiation at 10 min−1. For the scanning electron
microscopy (SEM) study of the samples, a JEOL JSM-6360LA scanning electron microscope was used. The
compositions of samples were analyzed by inductively coupled plasma analysis (ICP) using a Varian Vista-AX
device. The specific surface areas of samples were determined by the BET method using a micromeritics
ASAP2010C apparatus, and the gas adsorbed at ‒196 C was pure nitrogen.
Fig. 1S SEM images of Co4Al-LDH (A) and Co4Al oxide (B)
Table 1S ICP and BET analysis of CoAl oxides with different ratios
Mole ratio of Co/Al
Samples
Co content
Surface area
(wt%)
(m2g-1)
1.73
43.3
66
3.0
2.49
44.1
67
4.0
3.06
45.2
61
Theoretical
Experimental
Co2Al oxide
2.0
Co3Al oxide
Co4Al oxide
Intensity, a.u.
Co4Al oxide
Co4Al-LDH
10
20
30
40
50
60
70
2θ, degree
Fig. S2 XRD patterns of Co4Al-LDH and Co4Al oxide after reused