RT Journal Article
SR Electronic
T1 The Chemistry of Bulk Hydrogen: Reaction of Hydrogen Embedded in Nickel with Adsorbed CH<sub>3</sub>
JF Science
JO Science
FD American Association for the Advancement of Science
SP 223
OP 225
DO 10.1126/science.257.5067.223
VO 257
IS 5067
A1 Johnson, A. D.
A1 Daley, S. P.
A1 Utz, A. L.
A1 Ceyer, S. T.
YR 1992
UL http://science.sciencemag.org/content/257/5067/223.abstract
AB Studies in heterogeneous catalysis have long speculated on or have provided indirect evidence for the role of hydrogen embedded in the catalyst bulk as a primary reactant. This report describes experiments carried out under single-collision conditions that document the distinctive reactivity of hydrogen embedded in the bulk of the metal catalyst. Specifically, the bulk H atom is shown to be the reactive species in the hydrogenation of CH3 adsorbed on Ni(111) to form CH4, while the H atoms bound to the surface were unreactive. These results unambiguously demonstrate the importance of bulk species to heterogeneous catalytic chemistry.