@article {48020,
	title = {C-O hydrogenolysis of C3-C4 polyols selectively to terminal diols over Pt/W/SBA-15 catalysts},
	journal = {Catalysts},
	volume = {12},
	year = {2022},
	month = {SEP},
	pages = {1070},
	type = {Article},
	abstract = {<p>
	Pt/W/SBA-15 catalysts (with Pt-loading = 0.5-4 wt\% and W-loading = 1 wt\%) prepared by the sequential impregnation method were evaluated for selective C-O cleavage of erythritol and glycerol in an aqueous medium. The Pt and W particles dispersed on SBA-15 approached close proximity at higher Pt loadings and afforded synergistic enhancement in C-O hydrogenolysis activity/selectivity. 1,4-Butanediol yields of 30.9\% (at 190 degrees C, 50 bar H-2 and 24 h) and 1,3-propanediol yields of 34.4\% (at 190 degrees C, 50 bar H-2 and 12 h of reaction) were obtained over these catalysts. Pt nanoparticles (facilitating dissociative H-2 adsorption and spillover) and W (present as acidic oligomeric WOx species; activating and coordinating the polyol via 1 degrees-OH group) worked in tandem for the selective hydrogenolysis of polyols yielding terminal diols of industrial demand.</p>
},
	keywords = {diol, Erythritol, Glycerol, Hydrodeoxygenation, Pt, SBA-15, W},
	doi = {10.3390/catal12091070},
	author = {Bhowmik, Susmita and Enjamuri, Nagasuresh and Marimuthu, Banu and Darbha, Srinivas}
}
@article {48187,
	title = {Insights into active tungsten species on Pt/W/SBA-15 catalysts for selective hydrodeoxygenation of glycerol to 1,3-propanediol},
	journal = {Molecular Catalysis},
	volume = {531},
	year = {2022},
	month = {OCT},
	pages = {112704},
	type = {Article},
	abstract = {<p>
	Diols are important class of industrial chemicals. Their synthesis from bio-resources (instead from fossil feed-stocks) is sustainable. In this study, we probed active tungsten species on Pt/W/SBA-15 catalysts for selective synthesis of 1,3-propanediol (1,3-PDO) from aqueous glycerol through a liquid-phase hydrodeoxygenation re-action. A synergistic enhancement in glycerol conversion and 1,3-PDO selectivity was observed when both Pt and W were present on the catalyst. A volcano-shape variation followed with a gradual increase in glycerol conversion and 1,3-PDO yield with W-loading (0.25-15 wt\%) was observed. Pt dispersion and acidity of the catalyst dis-played similar variations with the W-loading confirming their critical role in the reaction. Structure-function relationships inferred that oligomeric WOx with moderate Bro center dot nsted acidity (predominant at 1 wt\% W-loading) in contact with dispersed Pt are the active species for 1,3-PDO formation and crystalline WO3 with strong Bro center dot nsted acidity (prevalent above 4 wt\% W-loading) in association with Pt nanoparticles lead to 1-propanol formation.</p>
},
	keywords = {3-Propanediol, Active sites, Glycerol, Hydrodeoxygenation, Hydrogenolysis, Supported Pt-WO x},
	issn = {2468-8231},
	doi = {10.1016/j.mcat.2022.112704},
	author = {Bhowmik, Susmita and Enjamuri, Nagasuresh and Sethia, Govind and Akula, Venugopal and Marimuthu, Banu and Darbha, Srinivas}
}
