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. 2018 Jun 12;8(38):21340–21353. doi: 10.1039/c8ra03430c

Relative atom% of Mo species in sulfided and spent catalysts.

Catalyst	Sulfided catalysts			Spent catalysts
Catalyst	Mo^VI–S^a (%)	Mo^V–OS^b (%)	Mo^VI–O^c (%)	Mo^VI–S (%)	Mo^V–OS (%)	Mo^VI–O (%)
Mo/K/SBA-15	49.1	23.66	25.84	68.29	14.00	16.25
K/Mo/SBA-15	62.61	18.29	18.80	79.37	5.44	11.97
K–Mo/SBA-15	63.50	13.53	22.96	71.49	13.98	14.31

^a

The Mo^IV species related to MoS₂.

^b

The Mo^V surrounded by oxygen and sulfur atoms.

^c

The oxidized Mo^VI species.