The decomposition of ethanol has been investigated on Pt metals supported by carbon Norit of high surface area. The reaction starts above 450 K and approaches total conversion at 673-723 K. The major products are H-2, CO and CH4. The selectivity of hydrogen formation on all metals supported by carbon Norit scattered around 30%, and almost similar to 40% of the hydrogen content of ethanol has been converted to gaseous hydrogen at the total conversion. The order of the efficiency of the metals based on the turnover frequencies is Ru > Pt > Ir >Rh > Pd. An advantageous feature of the Norit-supported Pt metals is that no deactivation occurred at 723 K in 10 h, which is in contrast to the behaviour of Pt/Al2O3. The high stability of the catalysts is attributed to the lack of reactive OH groups required for the formation of acetate poisoning the metals. Adding water to ethanol only slightly improved the production of hydrogen.