EPR characterisation of (CeO2)1-y(La2CuO4)y oxide mixtures and their catalytic activity for NO reduction by CO

O− spin bags formation in (CeO2)0.75(La2CuO4)0.24 catalyst after extended use for reduction of NO by CO

“…However, also with the former sample just one EPR pattern dominated after catalytic use in reaction Eq. (1) (Sample S2U), while no significant change was observed during the catalytic reaction with S4, as already reported in [3]. This suggested that some structural changes occurred with the oxygen-poorer S2 during that reaction.…”

“…In fact, a broad and intense low-field EPR line was observed with the former sample, in the spectrum recorded at 135, 293, and 373 K. In these cases, the Lorentzian shape fits better than the Gaussian shape. The other parameters, obtained by spectral simulation, are compared in Table 1 to the ones already reported [3] for S2U.…”

“…The main catalytic results have already been reported [3]. Here we analyse in detail the behaviour of two of such samples, namely those with y = 0.25 and 0.43, after an extended-time-on-stream run, carried out at 450°C.…”

Continuous Reactions in Supercritical Water: A New Route to La2CuO4 with a High Surface Area and Enhanced Oxygen Mobility

“…[8] These studies implied that the Si dangling bonds can be alternatively viewed as reactive ªfree radicalsº involved in the surface-attachment reactions. On the other hand, organic radical based CÀC bond formation [9] was recently shown to be highly selective in enantioselective synthesis [10] or preparation of controlled macromolecular architectures. [11] Therefore, it is of significant interest to investigate whether this radical-based CÀC formation is feasible on silicon surfaces in association with Si dangling bonds.…”

Continuous Reactions in Supercritical Water: A New Route to La2CuO4 with a High Surface Area and Enhanced Oxygen Mobility

“…[6,7] Recently, we showed that the radical nature of the electrondeficient Si dangling bonds plays an essential role in the [42] cycloaddition of thiophene to the Si(111)-(7 Â 7) surface. On the other hand, organic radical based CÀC bond formation [9] was recently shown to be highly selective in enantioselective synthesis [10] or preparation of controlled macromolecular architectures. On the other hand, organic radical based CÀC bond formation [9] was recently shown to be highly selective in enantioselective synthesis [10] or preparation of controlled macromolecular architectures.…”