Skip to main content
padlock icon - secure page this page is secure

The role of surface-bound hydroxyl radicals in the reaction between H2O2 and UO2

Buy Article:

$60.00 + tax (Refund Policy)

In this work, we have studied the reaction between H2O2 and UO2 with particular focus on the nature of the hydroxyl radical formed as an intermediate. Experiments were performed to study the kinetics of H2O2 consumption and uranium dissolution at different initial H2O2 concentrations. The results show that the consumption rates at a given H2O2 concentration are different depending on the initial H2O2 concentration. This is attributed to an alteration of the reactive interface, likely caused by blocking of surface sites by oxidized U/surface-bound hydroxyl radicals. The dissolution yield given by the amount of dissolved uranium divided by the amount of consumed hydrogen peroxide was used to compare the different cases. For all initial H2O2 concentrations, the dissolution yield increases with reaction time. The final dissolution yield decreases with increasing initial H2O2 concentration. This is expected from the mechanism of catalytic decomposition of H2O2 on oxide surfaces. As the experiments were performed in solutions containing 10 mM [Inline formula] and a strong concentration dependence was observed in the 0.2–2.0 mM H2O2 concentration range, we conclude that the intermediate hydroxyl radical is surface bound rather than free.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Article Media
No Metrics

Keywords: H2O2; Hydroxyl radical; UO2; catalysis; surface

Document Type: Research Article

Affiliations: 1: Department of Chemistry, Applied Physical Chemistry, KTH Royal Institute of Technology, Stockholm, Sweden 2: Japan Atomic Energy Agency, Nuclear Science and Engineering Directorate, Nakagun, Japan

Publication date: July 3, 2018

  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more