Kinetic isotope effect in the heterogeneous reaction of graphite with H2O (D2O)

Article abstract of DOI:10.1063/1.442339

Thermogravimetric studies have been carried out for the reaction of H2O (D2O) with pure graphite surfaces and with graphite surfaces containing BaCO3 catalyst.At temperatures near 1200 K the kinetic isotope effect has been measured to be about a factor of 2 for both pure graphite and BaCO3-graphite.This value of the ratio of rates for H2O compared to D2O is consistent with zero point energy differences between the two isotopic reactants, and suggests that the transition state in the rate determining step involves a complex in which an O-H bond is being broken.The similarity of the magnitude of the isotope effect for both the catalyzed and the uncatalyzed reaction suggests that in both cases a similar O-H bond breaking mechanism is operative in the rate determining step.

Full text of DOI:10.1063/1.442339

Kinetic isotope effect in the heterogeneous reaction of graphite with H2O (D2O)
John T. Yates Jr. and D. W. McKee
Citation: The Journal of Chemical Physics 75, 2711 (1981); doi: 10.1063/1.442339
View online: http://dx.doi.org/10.1063/1.442339
View Table of Contents: http://scitation.aip.org/content/aip/journal/jcp/75/6?ver=pdfcov
Published by the AIP Publishing
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This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
130.70.241.163 On: Sat, 20 Dec 2014 20:21:59

This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
130.70.241.163 On: Sat, 20 Dec 2014 20:21:59

This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
130.70.241.163 On: Sat, 20 Dec 2014 20:21:59