Role of structural fluctuation in a surface reaction studied by scanning tunneling microscopy: the CO+O-->CO2 clean-off reaction on Ag(110)-(2x1)-O.
The kinetics of the clean-off reaction of O adatoms by CO on Ag(110)-(2x1)-O is investigated by scanning tunneling microscopy. The reaction is accelerated in the lower O coverage range where AgO chains with (nx1) (n> or =4) configurations show significant structural fluctuation. Simulations based on the Ising model are used to provide a quantitative understanding of the acceleration, which originates from the dynamical formation of active O adatoms by fluctuation of AgO chains.
Nakagoe
Osamu
O
Department of Photoscience, The Graduate University for Advanced Studies (SOKENDAI), Hayama, Kanagawa, 240-0193, Japan.
Watanabe
Kazuya
K
Takagi
Noriaki
N
Matsumoto
Yoshiyasu
Y