<p class="MsoNormal" style="margin-bottom: 12.0pt; text-align: left; mso-line-height-alt: 14.0pt; layout-grid-mode: char; mso-layout-grid-align: none;" align="left">Features of the Mechanism of Catalityc Oxidation of Carbon Monoxide on Pd/Al<sub>2</sub>O<sub>3</sub> Catalysts
Discuss this preprint
Start a discussion What are Sciety discussions?Listed in
This article is not in any list yet, why not save it to one of your lists.Abstract
The mechanism of catalytic low-temperature (T≤150 °C) oxidation of CO on Pd/Al2O3 was studied using labeled oxygen and thermal desorption analysis. It was found that the reaction proceeds through interaction in intermediate complexes of CO molecules with hydroxyl groups of Al2O3. A combined reaction mechanism through the formation and decomposition of carboxyl-type structures was proposed, in which adsorbed oxygen reoxidizes reduced palladium atoms and ensures the decomposition of carboxyl structures with the formation of CO2 and the regeneration of OH groups. It was shown that with a small addition of Pd (0.04-0.1 wt.%) the activity of the catalyst increases significantly. The positive effect is due to the activation of CO or a change in the state of oxygen on the surface of the catalyst.