Browsing by Author "Thomson, Samuel J."

Filter results by typing the first few letters
Now showing 1 - 1 of 1
  • No Thumbnail Available
    Item
    Sintering Studies on Platinum Black Catalysts: Part 1.—Effect of Pretreatment and Reaction on Particle Size
    (Journal of the Chemical Society : Faraday Transaction - I. The Chemical Society, London. 1973, 69 (1), 1973) Baird, Thomas; Paal, Zoltan; Thomson, Samuel J.
    Counter claims appear in the literature on the effects of the particle size, sintering and pre-treat- ment of a catalyst on its activity. We have investigated these by studying a platinum black catalyst and the way in which helium, hydrogen, air, oxygen and thermal cycling affect the particle size as seen in the electron microscope. By making a logical sequence of experiments it has been possible to show that the sintering of the catalyst was most affected by the presence of hydrogen which caused considerable growth in crystallite size. It thus seems possible that apparent effects of reaction and thermal treatment may have, in previous work, been caused by pre-treatment in hydrogen.