The amount of oxygen chemisorbed at -78°C has been measured on the sulphided surface of tungsten catalysts supported on Al2O3 and SiO,; it is shown for the first time that there is a correlation with the activity of the catalyst for hydrodeoxygenation of furan.

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Several Y-Ba-Cu-O compositions including the superconducting YBa2Cu30~ are scanned for their oxygen uptake using low temperature oxygen chemisorption (LTOC) technique as the principal probe at 195 K. BET surface area and pore size distribution were also determined. The results indicate their potential for use as mild, deep oxidation catalysts even under ambient and sub-ambient conditions.

No abstract