Rights statement: COPYRIGHT © 2015 THE ELECTROCHEMICAL SOCIETY. ALL RIGHTS RESERVED.
Accepted author manuscript, 501 KB, PDF document
Available under license: CC BY: Creative Commons Attribution 4.0 International License
Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
| <mark>Journal publication date</mark> | 2015 |
|---|---|
| <mark>Journal</mark> | ECS Transactions |
| Volume | 66 |
| Number of pages | 12 |
| Pages (from-to) | 31-42 |
| Publication Status | Published |
| <mark>Original language</mark> | English |
| Event | Symposium on Electrochemical Engineering General Session - 227th ECS Meeting - Chicago, United States Duration: 24/05/2015 → 28/05/2015 |
| Conference | Symposium on Electrochemical Engineering General Session - 227th ECS Meeting |
|---|---|
| Country/Territory | United States |
| City | Chicago |
| Period | 24/05/15 → 28/05/15 |
Ruthenium is a fission product possessed of two relatively long lived isotopes, Ru and Ru, both of which form part of the Highly Active (HA) waste raffinate during spent nuclear fuel reprocessing. During reprocessing ruthenium, which may be in the form of the RuNO+ complex, encounters temperatures conducive to volatilization. Due rutheium's high specific radioactivity it is important to understand the mechanism by which volatilisation occurs. Here we use combined CV, RDE and electrochemical microgravimetry experiments in a study of the the RuCl3 system for the first time. We do this in the interest of establishing NO-free Ru(III) baseline behaviour so as to support future studies on NO complexed ruthenium. Using wide aqueous solvent window carbon electrodes we have observed discrete oxidations to a solution phase Ru(III)-Ru(IV)-Ru(III) trimer, to solid RuO2 and volatile RuO4. We have also observed and assigned discrete reductions of solid RuO2 back to Ru(III) and Ru(III) reduction to ruthenium metal.