01670nas a2200241   4500008004100000022001400041245010800055210006900163260007300232300001000305490000700315520079400322653001001116653002401126653002701150653002101177653002101198653000801219100002001227700002101247700002901268856013101297       2013                        eng d  a1566-736700aHeterogeneous Co3O4 catalyst for selective oxidation of aqueous veratryl alcohol using molecular oxygen0 aHeterogeneous Co3O4 catalyst for selective oxidation of aqueous   aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcMAR  a66-690 v333 a<p>Nano-structured, spinel Co3O4 catalyst was developed for the aqueous phase oxidation of veratryl alcohol, which showed the highest conversion of 85% with 96% selectivity to veratryl aldehyde. The co-existence of Co3+ and Co2+ species in the octahedral and tetrahedral positions respectively, was confirmed by XPS, cyclic voltammogram, TPR and TPO characterization. The rod-like morphology of Co3O4 catalyst was confirmed by HRTEM. The effects of various reaction parameters namely, catalyst concentration, temperature and partial oxygen pressure on conversion and selectivity patterns were also studied for the oxidation of veratryl alcohol. This catalyst also showed an excellent stability as evidenced by successful reusability for three times. (C) 2012 Published by Elsevier B.V.</p>10aCo3O410aCyclic voltammogram10aLiquid phase oxidation10aMolecular oxygen10aVeratryl alcohol10aXPS1 aMate, Vivek, R.1 aShirai, Masayuki1 aRode, Chandrashekhar, V.  uhttps://library.ncl.res.in/content/heterogeneous-co3o4-catalyst-selective-oxidation-aqueous-veratryl-alcohol-using-molecular-002066nas a2200265   4500008004100000022001400041245014100055210006900196260007300265300001200338490000800350520112500358653002201483653001501505653002001520653000801540653002101548100002001569700001401589700001801603700001801621700001501639700001701654856012901671       2014                        eng d  a0926-860X00aEffect of preparation parameters on characterization and activity of Co3O4 catalyst in liquid phase oxidation of lignin model substrates0 aEffect of preparation parameters on characterization and activit  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcOCT  a130-1380 v4873 a<p>The nano structured spinel cobalt oxide (Co3O4) was prepared via simple co-precipitation method and its catalytic activity was evaluated for the liquid phase aerobic oxidation of lignin sub structure compounds such as veratryl alcohol. Catalyst preparation parameters influenced its morphology eventually affecting its oxidation activity. Thus, nano rod shaped CO3O4 catalyst showed 75% and 38% conversion of veratryl alcohol with complete selectivity to veratryl aldehyde in toluene and water, respectively, under base free condition. The influence of reaction conditions, such as temperature, oxygen pressure and catalyst loading was studied to obtain the optimum product yield and selectivity to the desired product. Furthermore, oxidation of various sub-structures of lignin model compounds was also studied over the same catalyst which was found to be in the following order: secondary alcohol &gt;di-substituted &gt; tri-substituted &gt; monosubstituted &gt; non-substitution. The stability of the catalyst was confirmed by its successful recycle for three times. (c) 2014 Elsevier B.V. All rights reserved.</p>10aConiferyl alcohol10aNano Co3O410aSinapyl alcohol10aTPR10aVeratryl alcohol1 aMate, Vivek, R.1 aJha, Ajay1 aJoshi, U., D.1 aPatil, K., R.1 aShirai, M.1 aRode, C., V.  uhttps://library.ncl.res.in/content/effect-preparation-parameters-characterization-and-activity-co3o4-catalyst-liquid-phase-0