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Tribochemical Decomposition of Light Ionic Hydrides at Room Temperature

AuthorsNevshupa, Roman ; Ares, Jose Ramón; Fernández, Jose Francisco; Campo, Ángel Adolfo del ; Román García, Elisa Leonor
Magnesium hydride
Hydrogen kinetics
Issue Date16-Jul-2015
PublisherAmerican Chemical Society
CitationJournal of Physical Chemistry Letters 6(14): 2780-2785 (2015)
AbstractTribochemical decomposition of magnesium hydride (MgH2) induced by deformation at room temperature was studied on a micrometric scale, in situ and in real time. During deformation, a near-full depletion of hydrogen in the micrometric affected zone is observed through an instantaneous (t < 1 s) and huge release of hydrogen (3–50 nmol/s). H release is related to a nonthermal decomposition process. After deformation, the remaining hydride is thermally decomposed at room temperature, exhibiting a much slower rate than during deformation. Confocal-microRaman spectroscopy of the mechanically affected zone was used to characterize the decomposition products. Decomposition was enhanced through the formation of the distorted structure of MgH2 with reduced crystal size by mechanical deformation.
Publisher version (URL)https://doi.org/10.1021/acs.jpclett.5b00998
Identifiersdoi: 10.1021/acs.jpclett.5b00998
e-issn: 1948-7185
Appears in Collections:(ICMM) Artículos
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