Direct and indirect channels to molecular dissociation at metal and metal alloy surfaces

摘要: Publisher Summary This chapter discusses two limiting dynamical routes for the dissociation of a molecule at surface—direct and indirect channels. The direct channel involves breaking molecular bond during initial collision with surface. effective activation barrier presented is function internal degrees freedom position impact in surface unit cell. most dynamically accessible, because energy partition within can be selected, outcome encounter provides map potential perhaps best exemplified by activated hydrogen on copper, which has become model system study dynamics. encompasses class that takes place through total or partial accommodation “precursor” subsequently goes to dissociate. Entrance into precursor state either nonactivated depending its electronic configuration respect gas phase molecule. Like channel, this part accessible dynamical. probability will go dissociate depends between desorption, provided, accommodated molecules,