title: Green synthesis of Ni-Nb oxide catalysts for low-temperature oxidative dehydrogenation of ethane.
abstract: The straightforward solid-state grinding of a mixture of Ni nitrate and Nb oxalate crystals led to, after mild calcination (T<400 °C), nanostructured Ni-Nb oxide composites. These new materials efficiently catalyzed the oxidative dehydrogenation (ODH) of ethane to ethylene at a relatively low temperature (T<300 °C). These catalysts appear to be much more stable than the corresponding composites prepared by other chemical methods; more than 90 % of their original intrinsic activity was retained after 50 h with time on-stream. Furthermore, the stability was much less affected by the Nb content than in composites prepared by classical "wet" syntheses. These materials, obtained in a solvent-free way, are thus promising green and sustainable alternatives to the current Ni-Nb candidates for the low-temperature ODH of ethane.
authors.affiliation: KAUST Catalysis Center, King Abdullah University of Science and Technology, Thuwal 23955-6900 (Saudi Arabia).
authors.forename: Haibo
authors.initials: H
authors.lastname: Zhu
authors.forename: Devon C
authors.initials: DC
authors.lastname: Rosenfeld
authors.forename: Dalaver H
authors.initials: DH
authors.lastname: Anjum
authors.forename: Valérie
authors.initials: V
authors.lastname: Caps
authors.forename: Jean-Marie
authors.initials: JM
authors.lastname: Basset
mesh_terms: D002384:Catalysis; D060326:Chemistry Techniques, Synthetic; D004980:Ethane / Q000737:chemistry*; D055772:Green Chemistry Technology; D006865:Hydrogenation; D009532:Nickel / Q000737:chemistry*; D009556:Niobium / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry*; D013696:Temperature
chemical_list: D010087:Oxides; D009556:Niobium; D009532:Nickel; D004980:Ethane
keywords: doping; heterogeneous catalysis; niobium; oxidative dehydrogenation; solid-phase synthesis