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The Reaction of Hydrogen with Cerium Metal at various temperatures
Author(s) -
Gayer K. H.,
Melotik D. J.
Publication year - 1968
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.19683630112
Subject(s) - cerium , reaction rate , hydride , metal , chemistry , reaction mechanism , rate equation , diffusion , hydrogen , thermodynamics , reaction–diffusion system , induction period , inorganic chemistry , catalysis , kinetics , organic chemistry , physics , quantum mechanics
The rate of formation of cerium hydride was found to increase with temperature from 120–265 °C, decrease between 370–500 °C, and then rise again at 625 °C. Induction periods for the reaction were observed at 370 and 500 °C. At 120 °C the reaction was found to follow the parabolic rate law, which indicates that the reaction was diffusion controlled. For reactions at 310 and 500 °C, the H/Ce vs, time curves were sigmoidal corresponding to four stages: induction, autoacceleration, linear and deceleration. Speculations are made as to the possible reaction mechanism.