ChemRxiv
These are preliminary reports that have not been peer-reviewed. They should not be regarded as conclusive, guide clinical practice/health-related behavior, or be reported in news media as established information. For more information, please see our FAQs.
V4_MHVol_article_manuscript_.pdf (1.41 MB)

The Thermodynamic Way of Assessing Reversible Metal Hydride Volume Expansion: Getting a Grip on Metal Hydride Formation Overpotential

preprint
revised on 06.02.2021, 18:49 and posted on 08.02.2021, 10:23 by Roland Hermann Pawelke

The relative volume expansion of reversible metal hydride crystals upon formation is determined by means of the van’t Hoff reaction entropy and STP ideal gas parameters, the development of this approach leads to a general method for calculating metal hydride single-crystal density. These results allow highlighting the pressure requirement to hydride phase formation, shown by the example of Ti-NaAlH4.

Funding

European Space Agency grant 4000105330/12/NL/CLP

History

Email Address of Submitting Author

roland.pawelke@hushmail.com

Institution

FOTEC Forschungs- und Technologietransfer GmbH

Country

Austria

ORCID For Submitting Author

0000-0002-6944-2240

Declaration of Conflict of Interest

There are no conflicts to declare.

Version Notes

V4: Some minor rephrasing of passages; in equation 13 there was a wrong hydrogen mol number in the sum formula (1+1.5 instead of 1+0.5), however a mistake of no consequence; a nice notion about the relation of the chemical potential solution to the one based on molar volume has been inserted, the space has been created by phrasing the critique of an unthinking positivist vantage point shorter; length is still 3000 words.

Exports