Dr. Robbie Warringham
Postdoc

ETH Hönggerberg
HCI E131
Vladimir-Prelog-Weg 1
CH-8093 Zurich

tel: +41 4463 34606

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    Applications of positron annihilation lifetime spectroscopy in catalyst characterization

     As a diffusional probe, positrons are ideally suited to study materials containing extended pore networks, e.g. zeolites. However positron interactions in such materials have been lightly studied. My research explores the applicability of positrons to characterise porous materials, to better understand the structure and condition of the global pore network.

    2015-present Post-doctoral researcher in the group of Prof. Pérez-Ramírez, ETH Zürich, Switzerland
    2010-2014 PhD studentship in the group of Dr David Lennon, University of Glasgow, Scotland
    2004-2010 MSc and BSc Chemistry with Medicinal Chemistry, University of Glasgow, Scotland
    • Mapping the birth and evolution of pores upon thermal activation of layered hydroxides
      R. Warringham, S. Mitchell, R. Murty, R. Schaeublin, P. Crivelli, J. Kenvin, J. Pérez-Ramírez
      Chem. Mater. 2017, 29, 4052-4062 (doi:10.1021/acs.chemmater.7b00734, front cover)
    • Pore topology effects in positron annihilation spectroscopy of zeolites
      A. Zubiaga, R. Warringham, S. Mitchell, L. Gerchow, D. Cooke, P. Crivelli, J. Pérez-Ramírez
      ChemPhysChem 2017, 18, 470-479 (doi:10.1002/cphc.201601258, front cover)
    • Insights into the mechanism of zeolite detemplation by positron annihilation lifetime spectroscopy
      R. Warringham, L. Gerchow, A. Zubiaga, D. Cooke, P. Crivelli, S. Mitchell, J. Pérez-Ramírez
      J. Phys. Chem. C 2016, 120, 25451-25461 (doi:10.1021/acs.jpcc.6b08931)
    • Structural analysis of IPC zeolites and related materials using positron annihilation spectroscopy and high-resolution argon adsorption
      J. Jagiello, M. Sterling, P. Eliášová, M. Opanasenko, A. Zukal, R.E. Morris, M. Navaro, Alvaro Mayoral, P. Crivelli, R. Warringham, S. Mitchell, J. Pérez-Ramírez, J. Čejka
      Phys. Chem. Chem. Phys. 2016, 18, 15269-15277 (doi:10.1039/c6cp01950a)
    • Quantifying the complex pore architecture of hierarchical faujasite zeolites and the impact on diffusion
      J. Kenvin, S. Mitchell, M. Sterling, R. Warringham, T. C. Keller, P. Crivelli, J. Jagiello, J. Pérez-Ramírez
      Adv. Funct. Mater. 2016, 26, 5621-5630 (doi:10.1002/adfm.201601748)
    • Analysis of pore connectivity in hierarchical zeolites by positron annihilation lifetime spectroscopy: Impact of implantation profile
      A. Zubiaga, R. Warringham, M. Boltz, D. Cooke, P. Crivelli, D. Gidley, J. Pérez-Ramírez, S. Mitchell
      Phys. Chem. Chem. Phys. 2016, 18, 9211-9219 (doi:10.1039/C6CP00408C)
    • The application of inelastic neutron scattering to explore the significance of a magnetic transition in an iron based Fischer-Tropsch catalyst that is active for the hydrogenation of CO
      R. Warringham, A.R. McFarlane, D.A. MacLaren, P.B. Webb, R.P. Tooze, J. Taylor, R.A. Ewings, S.F. Parker, D. Lennon
      J. Chem. Phys. 2015, 143, 174703 (doi:10.1063/1.4935054)
    • The application of inelastic neutron scattering to investigate a pre-reduction treatment of an iron Fischer-Tropsch catalyst
      R. Warringham, N.G. Hamilton, I.P. Silverwood, C. How, P.B. Webb, R.P. Tooze, W. Zhou, C.D. Frost, S.F. Parker, D. Lennon
      Appl. Catal. A: Gen. 2015, 489, 209-217 (doi:10.1016/j.apcata.2014.10.033)
    • Sample environment issues relevant to the acquisition of inelastic neutron scattering measurements of heterogeneous catalyst samples
      R. Warringham, D. Bellaire, S.F. Parker, J. Taylor, C.M. Goodway, M. Kibble, S.R. Wakefield, M. Jura, M.P. Dudman, R.P. Tooze, P.B. Webb, D. Lennon
      J. Phys.: Conf. Ser. 2014, 554, 12005 (doi:10.1088/1742-6596/554/1/012005)
    • The application of inelastic neutron scattering to investigate CO hydrogenation over an iron Fischer-Tropsch synthesis catalyst
      N.G. Hamilton, R. Warringham, I.P. Silverwood, J. Kapitan, L. Hecht, P.B. Webb, R.P. Tooze, W. Zhou, C.D. Frost, S.F. Parker, D. Lennon
      J. Catal. 2014, 312, 221-231 (doi:10.1016/j.jcat.2014.02.004)
    • The application of inelastic neutron scattering to investigate the ‘dry’ reforming of methane over an alumina-supported nickel catalyst operating under conditions where filamentous carbon formation is prevalent
      A.R. McFarlane, I.P. Silverwood, R. Warringham, E.L. Norris, R.M. Ormerod, C.D. Frost, S.F. Parker, D. Lennon
      RSC Adv. 2013, 3, 16577-16589 (doi:10.1039/c3ra42435a)
    • Characterisation of hydrocarbonaceous overlayers important in metal-catalysed selective hydrogenation reactions
      D. Lennon, R. Warringham, T. Guidi, S.F. Parker
      Chem. Phys. 2013, 427, 49-53 (doi:10.1016/j.chemphys.2013.04.005)
    • Vibrational analysis of an industrial Fe-based Fischer-Tropsch catalyst employing inelastic neutron scattering
      N.G. Hamilton, I.P. Silverwood, R. Warringham, J. Kapitan, L. Hecht, P.B. Webb, R.P. Tooze, S.F. Parker, D. Lennon
      Ange. Chem. Int. Ed. 2013, 52, 5608-5611 (doi:10.1002/anie.201210179)