Abstract
It has long been known that WO3 absorbs gaseous hydrogen in the presence of small quantities of a group VIII metal to form the non-stoichiometric bronze HxWO3, where 0 < x < 0.5. We now report the first demonstration that this absorption is almost entirely reversible at 273–423 K with molecular hydrogen being desorbed with decreasing pressure (0–140 kPa) at these temperatures. That desorption is preferred to reduction–dehydration to a lower oxide is unusual.
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Berzins, A., Sermon, P. Reversible isothermal sorption of hydrogen by tungsten trioxide in presence of platinum. Nature 303, 506–508 (1983). https://doi.org/10.1038/303506a0
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DOI: https://doi.org/10.1038/303506a0
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