Catalysis Letters, Vol.35, No.1-2, 155-163, 1995
Hysteresis and Oscillations in the Selectivity During the No-H-2 Reaction over Rh(533)
The NO-H-2 reaction over Rh(533) shows oscillatory behaviour at Hz-rich mixtures in the 10(-6) mbar pressure regime around 470 K. The selectivity changes periodically in time : the rate of N-2 formation is out of phase with the NH3 and H2O formation rates. Accumulation of atomic N plays a central role in the oscillating behaviour. A comparison will be made with the NO-H-2 reaction over Pt(100).