Figure 4

(A) The simulated production of carbon dioxide over each of the active phases (B) and the structure of the catalyst at the steady-state in the catalytic reactor with a catalytic feed of carbon monoxide and oxygen. Close to the inlet of the reactor, activity is dominated by reaction of oxygen with surface freed by carbon monoxide desorption. The desorption of carbon monoxide is rate limiting³². As carbon monoxide coverage decreases, surface oxide forms, contributing to the reaction in concert with the intermediate phase that contributes most at the lowest concentration of carbon monoxide. Overall, highest activity is achieved in a relatively small area of the reactor close to but not directly at the inlet.