126
Views
7
CrossRef citations to date
0
Altmetric
Contributed papers

Rhenium reactivity in H2O–O2 supercritical mixtures at high pressures

, &
Pages 792-799 | Received 25 May 2009, Published online: 15 Oct 2009
 

Abstract

Rhenium (Re) gaskets are commonly used in diamond anvil cell experiments to contain and pressurize samples. It is found that Re undergoes a series of reactions with supercritical fluid H2O–O2 mixtures at room temperature to form perrhenic acid (HReO4) and its hydrates. Similar reactivity of Re is also observed by destabilization of oxygen clathrate hydrates. The reaction mechanism is consistent with the electrochemistry of metal corrosion in an aqueous media. From a practical perspective for high pressure research, this finding indicates the need to consider the reactivity of Re when it is used as a gasket in experiments on aqueous fluids. More importantly, the documentation of these reactions demonstrates the oxidative potential of H2O–O2 supercritical mixtures for beneficial practical implications.

Acknowledgements

We thank the United States Department of Energy (DOE) for funding this work through the Carnegie/DOE Alliance Center (CDAC): Grant DE-FC03-03NA00144 and DOE Basic Energy Sciences: Grant DE-FG02-06ER46280. We are grateful to D. Sverjensky for comments and useful discussions.

Reprints and Corporate Permissions

Please note: Selecting permissions does not provide access to the full text of the article, please see our help page How do I view content?

To request a reprint or corporate permissions for this article, please click on the relevant link below:

Academic Permissions

Please note: Selecting permissions does not provide access to the full text of the article, please see our help page How do I view content?

Obtain permissions instantly via Rightslink by clicking on the button below:

If you are unable to obtain permissions via Rightslink, please complete and submit this Permissions form. For more information, please visit our Permissions help page.