V.P. Zakaznova-Herzog scite author profile

The surface oxidation behavior of LiBH(4) and NaBH(4) was investigated in view of the formation and structure of the surface oxidation and its effect on the hydrogen desorption kinetics. The sample surfaces were intentionally modified by exposure to oxygen in the pressure range from 10(-10) mbar up to 200 mbar. The induced surface changes were systematically studied by means of X-ray photoelectron spectroscopy. NaBH(4) shows a low reactivity with oxygen, while LiBH(4) oxidizes rapidly, accompanied by surface segregation of Li. The hydrogen desorption kinetics of LiBH(4) were studied by thermal desorption spectroscopy with particular emphasis on the analysis of the desorbed gases, i.e. diborane and hydrogen. The surface oxidation induces the formation of a Li(2)O layer on LiBH(4), significantly reduces the desorption of diborane, and enhances the rate of hydrogen desorption.

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Quantitative Raman spectroscopy: High-temperature speciation of potassium silicate melts

Malfait

Zakaznova-Herzog

Halter

2007

Journal of Non-Crystalline Solids

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V.P. Zakaznova-Herzog

High resolution XPS study of the large-band-gap semiconductor stibnite (Sb2S3): Structural contributions and surface reconstruction

Resolution of bridging oxygen signals from O 1s spectra of silicate glasses using XPS: Implications for O and Si speciation

High-resolution valence-band XPS spectra of the nonconductors quartz and olivine

Effect of the surface oxidation of LiBH4 on the hydrogen desorption mechanism

Quantitative Raman spectroscopy: High-temperature speciation of potassium silicate melts

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