Epitaxial growth of WO3−x needles on (10 1̄0) and (01 1̄0) WC surfaces produced by controlled oxidation with CO2
- 1 January 1999
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Chemical Communications
- No. 3,p. 269-270
- https://doi.org/10.1039/a807403h
Abstract
The controlled oxidation with CO2 of both high surface area (high Sg) and low surface area WC to form WO3–x needles, has been observed in situ, inside a controlled environment transmission electron microscope (CETEM), and also ex situ, in a standard flow reactor; the tungsten oxide needles, which consist mainly of distorted γ-WO2.72, propagate in an epitaxial fashion from the (10 0) and (01 0) surfaces of the parent WC crystals; possible mechanisms for the formation of the needles are proposed.Keywords
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