Fig. 3: Dynamics and extent of adsorbate-mediate restructuring under ethene flow, and its impact on products distribution.
a, b Batch analysis of CO2- and ethene-pulsed modulated excitation experiments shown in Fig. 2. For each particle size, 50.000–70.000 spectra were individually fit, fixing the coordination number but varying σ2. The values have been given an arbitrary offset for clarity. c The diffusion coefficient of C as calculated from time-resolved XAS measurements, plotted with the ethane TOF and the ratio of methane/ethane for 3 catalyst samples with different mean Ni particle sizes. d, e The turnover frequency (TOF) of ethene converted to methane (d) and ethane (e) per surface nickel atom per second, measured at 150 °C 1:1 H2:ethene with a GHSV of 2.000. f, g, h In-situ BF-STEM images of nanoparticles deposited directly onto SiN membrane via spark ablation, in gaseous environment of f H2 at 150 °C, g ethene at 150 °C, h and H2 at 150 °C.
