Reactivity of high surface area CeO2 synthesized by surfactant-assisted method to ethanol decomposition with and without steam

Hydrogen Production from Ethanol Steam Reforming Over Ni/CeO2 Nanocomposite Catalysts

“…Consequently, the lowest ethanol steam reforming reactivity was observed over this catalyst. Literature studies indicate that the enhancement of the redox properties of CeO 2 leads to an improvement in the reforming activity of cerium oxide-based catalysts [19,20]. The absence of ethylene in the effluents of Ni/Ce#500 and Ni/Ce#700 catalysts is an indication of very low ethanol dehydration rates.…”

“…It is known that CeO 2 commonly presents a low specific surface area and a low pore volume [19][20]24]. Table 1 shows the specific surface area and pore volume of the Ni/ CeO 2 samples heat-treated at different temperatures.…”

“…In addition, CeO 2 is known to enhance the reducibility and the dispersion of the supported metal. In spite of such interesting characteristics, the major limitation to applying CeO 2 as a support for metallic catalysts is its low specific surface area and poor textural stability under reduction conditions [17][18][19][20][21][22][23].…”

Cerium oxide nanoparticles prepared in self-assembled systems

“…Cationic surfactants are expected to be favorably adsorbed on ceria nanoparticles, primarily due to the high electronegativity of the oxygen atoms of ceria. The surface area of the prepared ceria could be increased from 50 m 2 /g to more than 300 m 2 /g on introducing C 16 TAB in the synthetic procedure [99]. Terribile et al [96] found that using C 16 TAB gives rise to ceria of higher porosity (in the range 1-8 nm with a maximum at 3.5 nm) and less agglomeration (i.e.…”

“…Well-known cationic quaternary ammonium surfactants have been used by many researchers to prepare ceria nanoparticles in aqueous media [96][97][98][99]. The most popular surfactant for this purpose is cetyltrimethylammonium bromide (C 16 TAB).…”