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.