Fig. 5.

Catalytic and long-term performance of powder catalysts. Highlighted powder catalysts are ${\mathrm{CoNi\mid }}_{\mathrm{P}}^{\mathrm{10∕30}}$, red and Pt/Al₂O₃, black. Catalytic rates are normalised with respect to the catalyst weight (10 mg). a, b Catalytic rates as a function of temperature for the: a CO oxidation reaction and b NO oxidation reaction. c CO₂ production rate as a function of time, over 650 h at 220 ^oC. Note that in a the Pt/Al₂O₃ catalyst is operating at full conversion starting around 275 °C. d CO₂ production rate as a function of CO mole fraction