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Experimental findings in support of atomic transport of hydrogen in silica
KTH, Tidigare Institutioner                               , Materialvetenskap.
2003 (engelsk)Inngår i: Journal of Applied Physics, ISSN 0021-8979, E-ISSN 1089-7550, Vol. 94, nr 8, s. 4819-4823Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Data supporting a view of both molecular and atomic transport of hydrogen in quartz is presented. By studying isotopic equilibration, it is shown that virtually all of the molecules diffusing through a 1.5 mm thick quartz membrane at 900 degreesC have undergone dissociation. The catalytic properties of platinum for the dissociation of H-2 are used to increase the surface concentration of atomic hydrogen on a quartz membrane. It is found that the high surface concentration increases the total flux of hydrogen through the membrane. It is also found by comparison with literature data that diatomic molecules probably diffuse in two modes in quartz. We suggest that these two modes are one atomic and one molecular.

sted, utgiver, år, opplag, sider
2003. Vol. 94, nr 8, s. 4819-4823
Emneord [en]
vitreous silica, si-sio2 interface, fused quartz, diffusion, hydroxyl, deuterium, exchange, kinetics, oxygen
Identifikatorer
URN: urn:nbn:se:kth:diva-22858DOI: 10.1063/1.1603350ISI: 000185664300012OAI: oai:DiVA.org:kth-22858DiVA, id: diva2:341556
Merknad
QC 20100525Tilgjengelig fra: 2010-08-10 Laget: 2010-08-10 Sist oppdatert: 2017-12-12bibliografisk kontrollert

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