Waugh-Type NiMo Heteropolycompounds as More Effective Precursors of Hydrodesulfurization Catalyst

Cationic Exchange of Evans‐Showell Polyoxometalate to Construct Efficient Hydrodesulfurization Catalyst

“…[10] The polyoxometalate (POM) with Co and Mo atoms in the same entity was used as the precursor in the fabrication of HDS catalysts with higher performance. Keggin, [11] Anderson, [12] Waugh, [13] and Strandberg-type [14] POMs have been successfully used in the fabrication of HDS catalysts with higher activities, especially the Anderson-type POM which possesses a 3d-metal Co element as a heteroatom in heteropolyanion. In addition, as a dimer structure deriving from the Anderson-type POM, the Evans-Showell-type POM (NH 4 ) 6 [Co 2 Mo 10 O 38 H 4 ] • 7H 2 O (denoted as Co2Mo10) was also reported to prepare more active HDS catalysts.…”

Constructing a superior Co–Mo HDS catalyst from a crystalline precursor separated from the impregnating solution

“…(3) The well-defined molecular structure and framework, which is the desired molecular platform to reveal the formation and conversion mechanism of the CoMoS active phase. So far, Keggin, [22][23][24][25] Anderson, [26][27][28] Waugh-type 29 POMs were used as such molecular platforms to prepare highly efficient HDS catalysts, and many achievements have resulted. Actually, the impregnating solution is a mixture of different Mo-containing POMs, which are metal-oxygen clusters with well-defined molecules.…”