5.     ADKINS, H., AND NISSEN, B. H. Selective Activation of Alumina. II. Reactions of Formic Acid at the Surface of Alumina. Jour. Am. Chem. Soc., vol. 45, 1923, pp. 809-815; Chem. Abs., vol. 17, 1923, p. 2104.

   Effects of Al₂O₃ catalysts prepared in different ways on the decomposition of HCO₂H were studied. The amounts of H₂ and CO₂ formed agreed very closely, so that decomposition occurs almost entirely according to the reactions HCO₂H=CO₂+H₂ and HCO₂H=CO+H₂O and to no considerable extent according to the equation 2 HCO₂H=HCHO+CO₂+H₂O. It is concluded that the distances separating the molecules of Al₂O₃, as determined by the method of preparation, were the important factors in defining the activity and selectivity of the catalyst