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Showing 1–8 of 8 results
Advanced filters: Author: Patrick Hemberger Clear advanced filters

  • The conversion of lignin by catalytic fast pyrolysis into useful fine chemicals is a promising route to fuel production, however selectivity and conversion are still not optimal. Here, the authors investigate the reaction mechanism by detection of reactive intermediates responsible for the formation of key products.

    • Patrick Hemberger
    • Victoria B. F. Custodis
    • Jeroen A. van Bokhoven
    ResearchOpen Access
    Nature Communications
    Volume: 8, P: 1-9

  • Solvents play a crucial role in catalysis, affecting both activity and selectivity. Here the authors demonstrate how solvent affinity to the catalyst surface influences the reaction pathways of 4-propylguaiacol.

    • Zihao Zhang
    • Qiang Li
    • Patrick Hemberger
    ResearchOpen Access
    Nature Communications
    Volume: 15, P: 1-10

  • The conversions of methanol or methyl chloride over zeolite catalysts are promising processes to produce valuable hydrocarbons, but their mechanisms are still not fully understood. Now these are evaluated using operando photoelectron photoion coincidence spectroscopy, which enables the direct observation of elusive intermediates such as methyl radicals or ketene.

    • Alessia Cesarini
    • Sharon Mitchell
    • Javier Pérez-Ramírez
    ResearchOpen Access
    Nature Catalysis
    Volume: 5, P: 605-614

  • Nanobowls represent building blocks of fullerenes and nanotubes as detected in combustion systems and deep space, but their formation mechanisms in these environments have remained elusive. Here, the authors explore the gas-phase formation of benzocorannulene and beyond to the C40 nanobowl.

    • Lotefa B. Tuli
    • Shane J. Goettl
    • Ralf I. Kaiser
    ResearchOpen Access
    Nature Communications
    Volume: 14, P: 1-12

  • Catalytic oxybromination is an important strategy for the upgrade of methane. Here, Pérez-Ramírez and co-workers employ operando photoelectron photoion coincidence spectroscopy as well as kinetic analyses and molecular simulations to unravel the complex reaction mechanism.

    • Vladimir Paunović
    • Patrick Hemberger
    • Javier Pérez-Ramírez
    Research
    Nature Catalysis
    Volume: 1, P: 363-370

  • Sensitive and isomer-specific analytical tools detect elusive intermediates and reveal reaction mechanisms. Photoelectron photoion coincidence spectroscopy, introduced in 1966, now serves as a reaction microscope, identifies intermediates, and delineates gaseous and surface-confined processes in heterogeneous catalysis.

    • Andras Bodi
    • Patrick Hemberger
    • Javier Pérez-Ramírez
    News & Views
    Nature Catalysis
    Volume: 5, P: 850-851