APPLICATION OF PURE CERIA AND COPPER-CERIA ELECTROSPUN NANOFIBER IN THE WATER GAS SHIFT REACTION

D Pal, R Chand, P Singh, P Mishra
unpublished
Pure CeO 2 and 20 mol. % Cu/CeO 2 composite nanofibers were fabricated by using Electrospinning method. Copper acetate monohydrate and cerium nitrate hexahydrate were used as the inorganic precursors, PVP was used as the guiding polymer and the electrospinning was carried out at 12kV DC voltage by maintaining a tip to collector distance of 10 cm. The synthesized nanofibers were characterized by SEM and EDX analysis and the average diameters of pure ceria and 20 mol. % Cu/CeO 2 nanofibers were
more » ... 2 nanofibers were found to be 130 nm and 117 nm (both before calcination), respectively. After calcination for 3 hours, the fiber diameters were reduced by around 30-40% due to the removal of organic compounds present in the nanofiber mats. The crystal structure of the nanofibers was determined by X-ray diffraction (XRD) technique. The most intense peak of CeO 2 was observed at a two-theta value of 27.84 0 and the average crystallite sizes of CeO 2 and 20 mol. % Cu/CeO 2 were calculated to be 12 nm and 9 nm, respectively. At 320 0 C, the nanofibers of 20 mol. % Cu/CeO 2 exhibited superior catalytic activity (61%CO conversion ~) compared to pure CeO 2 nanofibers (57%CO conversion ~). The catalytic activities were maintained up to 370 0 C in both the cases to ascertain their applicability in water gas shift reaction.
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