Intrinsically Unstable Behavior during the Oxidation of Carbon Monoxide on Platinum

Steady-state and dynamic hysteresis effects during lean co-oxidation of CO and C3H6 over Pt/Al2O3 monolithic catalyst

“…They showed that steady state multiplicity is result of thermokinetic coupling and interparticle transport limitations. Sustained oscillations are thought to result from the involvement of an underlying slow process such as the reversible formation of Pt oxide or the reconstruction of surface structure on particular exposed crystallographic planes such as Pt(1 0 0) and Pt(1 1 0) [30,31]. The coupling of such an underlying process, which typically has a slower time constant than the main adsorption, reaction, and desorption steps, can lead to isothermal periodic and even aperiodic oscillatory behavior.…”

Analysis of the kinetics of N2O–CO reaction on Pd(110)

“…To run N 2 O decomposition under steady-state conditions, one can remove adsorbed oxygen by CO. CO oxidation on Pt-group metals is well known to be also rapid. In particular, the steady-state kinetics of the CO-O 2 reaction is often controlled by reactant adsorption and/or blocking of adsorption sites by CO and accordingly exhibits a firstorder kinetic phase transition (see, e.g., the review by Razon and Schmitz [6] and more recent experimental data for Pt(1 1 1) [7], Pt(1 1 0) [8], Ir(1 1 1) [9], and supported Pd [10]; for general theory of kinetic phase transitions, see Refs. [11,12]).…”

Periodic operation of catalytic reactors—introduction and overview

“…Such oscillations have attracted a substantial research effort, even though they appear to be unusual in industrial processes. Several comprehensive reviews of spontaneous oscillations have been published [8][9][10][11]. Spontaneous oscillations appear to have periods of the order of the characteristic relaxation time.…”