12-14U

# 12-14U

By - Posted on 28 December 2012

UDC:
538.9
PACS:
82.65.+r, 82.40.Bj

Structural transformations of the surface and chemical oscillations

I.S. Bzovska
I.M. Mryglod

Temporal dynamics of the catalytic CO oxidation on Pt(110) surface is investigated with taking into account the adsorbate-driven structural transformations of the catalyst surface. Uniform temporal periodic chemical oscillations of the CO and oxygen coverages, as well as the fraction of the surface of the $1\times1$ structure are obtained in a narrow region of phase diagram between two uniform stable states of high and low catalytic activities, respectively. The condition at which oscillations of limit cycle type exist is analytically obtained. Oscillatory regime arises because of the interplay between bistability and adsorbate-induced surface reconstruction $1\times2-1\times1$ exposing patches with different O$_{2}$ sticking probabilities.

Year:
2012
Pages:
10