01971nas a2200229   4500008004100000022001400041245007800055210006900133260000800202300001100210490000800221520123500229653001001464653001201474653002701486653001701513653002401530100003201554700001901586700002901605856010701634       2023                        eng d  a0926-860X00aSelective oxidation of 5-HMF to DFF over alkali promoted Mn nanocomposite0 aSelective oxidation of 5HMF to DFF over alkali promoted Mn nanoc  cJUN  a1191800 v6593 a<p>
	Various compositions of Cs promoted Mn catalysts were synthesized and investigated for selective oxidation of 5HMF to DFF, among which Mn-Cs(80:20) was found to be most efficient giving 91 % conversion of 5-HMF and 99 % selectivity to DFF. Detail characterization like N2-sorption, BET surface area, TG-DTA, XRD, XPS, FE-SEM-EDX, TEM, HR-TEM, CO2-TPD, H2-TPR, O2-TPO, FTIR, Raman spectra and CH3OH-IR were done to establish structureactivity correlation. Enhanced surface area, porosity, thermal stability, dual morphologies were observed due to inclusion of Cs in Mn lattice domain which further enhanced the crystallinity, and oxygen diffusion on the surface. Mixed morphologies comprising nanoparticles (4-5 nm) and nanocubes (50-60 nm) were observed with enhanced redox potential and reduced work function due to weakening of Mn-O bonds. Significant increase in the basicity of catalyst, interfacial redox properties and lattice oxygen led to highly efficient oxidation of 5-HMF to DFF via Mars-van Krevelen mechanism at relatively milder conditions i.e. T = 90 degrees C and PO2= 200 psig. The catalyst was easily recyclable up to 7 times with minor loss in activity which was regenerated heat treatment protocol.</p>
10a5-HMF10aBiomass10aheterogeneous catalyst10apolyurethane10aSelective oxidation1 aSolanki, Bhanupratap, Singh1 aRoh, Hyun-Seog1 aRode, Chandrashekhar, V.  uhttps://library.ncl.res.in/content/selective-oxidation-5-hmf-dff-over-alkali-promoted-mn-nanocomposite