4 years ago

CO2 Hydrogenation over Pt-Containing UiO-67 Zr-MOFsThe Base Case

CO2 Hydrogenation over Pt-Containing UiO-67 Zr-MOFsThe Base Case
Sigurd Øien-Ødegaard, Boris Bouchevreau, Luca Braglia, Reynald Henry, Unni Olsbye, Elisa Borfecchia, Bert M. Weckhuysen, Sajjad Ahmadigoltapeh, Koen Bossers, Carlo Lamberti, Silvia Bordiga, Maela Manzoli, Bjørn Tore Lønstad-Bleken, Anne-Eva Nieuwelink, Emil Sebastian Gutterød, Karl Petter Lillerud, Andrea Lazzarini
CO2 hydrogenation was carried out over Pt-containing UiO-67 Zr-MOFs at T = 220–280 °C and ambient pressure, with H2/CO2 = 0.2–9 and contact times, τ = 0.004–0.01 gcat·min·mL–1. The catalysts were characterized by XRD, N2 adsorption, FESEM, TEM and HRTEM, Pt L3-edge XANES and EXAFS, dissolution-NMR, CO chemisorption, IR spectroscopy, and TGA. A positive correlation was observed between the degree of Pt reduction and CO2 conversion. Contact time variation experiments showed that CO is a primary product of reaction, while CH4 is a secondary product. Testing of catalyst crystals with 0.15 and 2.0 μm crystal size, respectively, revealed no influence of diffusion on the reaction rate. Comparison to a conventional Pt/SiO2 catalyst showed very similar activation energy, with Eapp = 50 ± 3 kJ·mol–1. However, the turnover frequency over Pt/SiO2 was significantly lower, and Pt/SiO2 did not yield methane as a product. The Pt-containing UiO-67 Zr-MOF catalyst showed stable activity during 60 h of testing.

Publisher URL: http://dx.doi.org/10.1021/acs.iecr.7b01457

DOI: 10.1021/acs.iecr.7b01457

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.