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Millet, Jean-Marc
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article
Development of a cell for <i>in-situ</i>/<i>operando</i> Mössbauer spectroscopy studies of Catalysts: Application to the characterization of iron nanoparticles used in Fischer–Tropsch reaction
Abstract
<jats:p>In this paper, we report the design of a stainless-steel cell with polyimide film windows for carrying out in situ Mossbauer spectroscopy studies with a horizontal x-ray beam. It allows recording spectra at pressures up to 0.2–0.3 MPa and temperatures up to 500 °C under a gas flow rate of up to 100 ml min−1. The catalyst is either directly deposited on the heating element or pressed into the form of a pellet for larger quantities. A wide range of heating or cooling rates can be used, and a very accurate sample temperature can be monitored for several days. An example of application to the study of a catalyst based on iron nanoparticles entrapped in silicalite-1 used for the Fischer–Tropsch reaction is presented to illustrate the use of the cell.</jats:p>