Rational design of ethanol steam reforming catalyst based on analysis of Ni/La₂O₃ metal–support interactions

Abstract

Ni/La2O3 nanocatalyst with strong interactions, compared to Ni/SiO2, generated higher H2 yield by suppressing the methanation reaction and coke deposition.

Design of Nickel Supported on Water-Tolerant Nb2O5 Catalysts for the Hydrotreating of Lignin Streams Obtained from Lignin-First Biorefining

“…The reduction temperature of the Ni(II) species supported on Nb 2 O 5 nanorods is much lower than that of bulk NiO (450°C) (Graça et al., 2014). Nevertheless, the range of Ni reduction temperatures between 320°C and 345°C is in line with previous studies on Ni/Nb 2 O 5 materials containing high nickel loadings (Janković et al., 2008, Liu et al., 2016). Interestingly, and contrary to what has been previously observed by other research groups (Chary et al., 2003, Wojcieszak et al., 2006), no shift of the Ni reduction peak to higher temperatures with an increase in Ni loading was observed.…”

Study of Defect Structure in Ferromagnetic Nanocrystalline CeO2: Effect of Ionic Radius

“…[22][23] As for the 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 electronic transitions from O 1s to La 5d-O 2p states of La 2 O 3 , the main absorption peak presents between 533 and 537 eV. 24 Upon La doping, the intensity of pre-peak at 530 eV is declined, as shown in the inset, which indicates the diminution of hybridization between Ce 4f 0 and O 2p states.…”

Elucidation of metal and support effects during ethanol steam reforming over Ni and Rh based catalysts supported on (CeO2)-ZrO2-La2O3

“…Zirconia supports are of interest independently, due to the oxide's ability to dissociate water molecules and provide hydroxyl species to the metal [34]. Lastly, among used modifiers, La2O3 is known to enhance the stability of Ni catalysts through strong metal-support interactions (SMSI), that lead to an enhancement of the dissociation of water [35] and the mobility of O species in CeO2 supports [31]. The enhanced catalytic stability during ESR over Ni catalysts with the addition of La2O3 has also been reported, attributed to the formation of thin overlayers of La2Ox on top of Ni particles [36].…”