3249.     ---------------.  [SRIKANTAN, B. S.]  Reactions at the Surface of Hot Metallic Filaments.  II.  The Reaction CO₂+H₂→H₂O+CO on Platinum-Iridium Alloys.  Jour. Indian Chem. Soc., vol. 6, 1929, pp. 949-958; Chem. Abs., vol. 24, 1930, p. 2036.

        Pt wire containing 5-30% Ir is more active than pure Pt.  The 30% Ir alloy is most active.  The energy of activation is less with a powerful catalyst than with a poor catalyst.  Temperature coefficients are calculated.