Journal: Faraday Discussions

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Abbreviation

Faraday Discuss.

Publisher

Royal Society of Chemistry

Journal Volumes

ISSN

1359-6640
1364-5498

Description

Search Results

Publications 1 - 10 of 91
  • Baaden, Marc; Barboiu, Mihail; Borthakur, Manash Pratim; et al. (2018)
    Faraday Discussions
  • Baykusheva, Denitsa; Kraus, Peter M.; Zhang, Song Bin; et al. (2014)
    Faraday Discussions
  • Kumar, Priyank V.; Rossi, Tuomas P.; Kuisma, Mikael; et al. (2019)
    Faraday Discussions
  • Bugaev, Aram L.; Usoltsev, Oleg A.; Guda, Alexander A.; et al. (2021)
    Faraday Discussions
    Palladium-based catalysts are exploited on an industrial scale for the selective hydrogenation of hydrocarbons. The formation of palladium carbide and hydride phases under reaction conditions changes the catalytic properties of the material, which points to the importance of operando characterization for determining the relation between the relative fractions of the two phases and the catalyst performance. We present a combined time-resolved characterization by X-ray absorption spectroscopy (in both near-edge and extended regions) and X-ray diffraction of a working palladium-based catalyst during the hydrogenation of ethylene in a wide range of partial pressures of ethylene and hydrogen. Synergistic coupling of multiple techniques allowed us to follow the structural evolution of the palladium lattice as well as the transitions between the metallic, hydride and carbide phases of palladium. The nanometric dimensions of the particles resulted in the considerable contribution of both surface and bulk carbides to the X-ray absorption spectra. During the reaction, palladium carbide is formed, which does not lead to a loss of activity. Unusual contraction of the unit cell parameter of the palladium lattice in the spent catalyst was observed upon increasing hydrogen partial pressure.
  • Milne, Chris J.; Weber, Peter M.; Kowalewski, Markus; et al. (2016)
    Faraday Discussions ~ Ultrafast Imaging of Photochemical Dynamics
  • Alavi, Ali; Atalar, Kemal; Berkelbach, Timothy C.; et al. (2024)
    Faraday Discussions
  • Sutter, Daniel; Gazzani, Matteo; Mazzotti, Marco (2016)
    Faraday Discussions
  • Maggioni, Giovanni; Mazzotti, Marco (2015)
    Faraday Discussions
  • Schöll, Jochen; Lindenberg, Christian; Vicum, Lars; et al. (2007)
    Faraday Discussions
    Growth kinetics of α L-glutamic acid was determined based on seeded batch desupersaturation experiments. The growth rate correlation applied in this study accurately describes the growth process in a temperature range of 25–45 °C and in a supersaturation range of 1–3. The newly developed approach for the growth rate characterization has the advantage of a high robustness especially with respect to the influence of competing particle formation mechanisms as nucleation or agglomeration. The efficient technique employs in situ process analytical technologies, e.g. attenuated total reflection Fourier transform infrared spectroscopy (ATR-FTIR) and focused beam reflectance measurement (FBRM), different ex situ analytical tools and population balance modeling combined with a non-linear least squares optimization algorithm to determine the growth kinetics. The growth mechanism was identified to be integration controlled and of birth and spread (B + S) type. The quality of the determined growth rate correlation was assessed by comparison with the experimental data and with literature data.
  • Fundamentals: General discussion
    Item type: Other Journal Item
    Althorpe, Stuart C.; Beniwal, Vijay; Bolhuis, Peter G.; et al. (2016)
    Faraday Discussions
Publications 1 - 10 of 91