1584. IVANNIKOV, P. Y., FROST, A. V., AND SHAPIRO, M. I. [Effect of Ignition Temperature on the Catalytic Activity of Zinc Oxide.] Compt. rend., acad. sci. U.R.S.S., 1933, pp. 124-126; Chem. Abs., vol. 28, 1934, p. 1595.

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Literature Abstracts

1584. IVANNIKOV, P. Y., FROST, A. V., AND SHAPIRO, M. I. [Effect of Ignition Temperature on the Catalytic Activity of Zinc Oxide.] Compt. Rend., Acad. Sci. U.R.S.S., 1933, pp. 124-126; Chem. Abs., vol. 28, 1934, p. 1595.

Activity of ZnO as catalyst for the decomposition of MeOH vapor decreased sharply with rise in ignition temperature of the hydrate from which the ZnO was formed. The hexagonal lattice remained unchanged between 110°-1,300° and had the following parameters: a=3.248±0.002 Å. U.; c/a=1.602±0.002. The size of the crystallites remained unchanged 100°-500°; a rapid increase began at 770°. A comparison of the changes in activity and crystal size showed that the decrease in activity began sooner and proceeded more rapidly than the decrease in surface caused by sintering.