8.     AGLIARDI, N., AND MARELLI, S. [Activated Adsorption of Hydrogen and of Carbon Monoxide on Cobalt.] Gazz. chim. ital., vol. 78, 1948, pp. 707-717; Chem. Abs., vol. 43, 1949, p. 3686.

  Co was prepared by decomposition of Co formate at 270° in vacuo and the adsorption apparatus was that used in previous experiments. With "cleaved" Co. adsorption of CO was at first more rapid than that of H2, but subsequently adsorption of CO became less than that of H2. When the Co was poisoned by CO, adsorption of H2 was smaller; nevertheless adsorption was even then more rapid than by Co not poisoned by CO. Mixtures of CO and H2 were adsorbed more rapidly than was pure H2. CoC2 traces of which are formed in the surface reactions with CO, tends to stabilize the adsorbing surface, and even with successive adsorptions of H2, the surface does not revert to its original condition. Under the conditions of the experiments, not all of the C is reduced by H2, and solution of the Co in dilute HNO3 showed the presence of elemental C. The apparent energy of activation of adsorption of CO is greater than that of H2 and decreases with increase in the amount of gas adsorbed.