FIGURE 3. Catalytic properties of Ni + SDC and Ru + CeO2 towards propane oxidation.
From the following article:
A thermally self-sustained micro solid-oxide fuel-cell stack with high power density
Zongping Shao, Sossina M. Haile, Jeongmin Ahn, Paul D. Ronney, Zhongliang Zhan and Scott A. Barnett
Nature 435, 795-798(9 June 2005)
doi:10.1038/nature03673
The feed gas composition was 10 ml min-1 C3H8 + 22.5 ml min-1 O2 + 90 ml min-1 He (all at STP). In all cases, the temperature reported is the real catalyst temperature, monitored by an in situ K-type thermocouple. a, Oxidation products as a function of temperature over 0.18 g of Ni + SDC powder (calcined at 1,350 °C). b, Oxidation products as a function of temperature 0.18 g Ru + CeO2 (Ru 7 wt%) catalyst powder reduced and calcined at 950 °C. c, d, Corresponding temperature dependences of propane and oxygen conversion over the Ni + SDC and Ru + CeO2 catalysts, respectively. e, Heat released as a function of temperature over the Ni + SDC and Ru + CeO2 catalysts owing to the exothermic oxidation reactions, as calculated from the measured catalytic activity. f, The ratio of partial oxidation products (CO + H2) to deep oxidation products (CO2 + H2O) over N + SDC catalyst and Ru + CeO2 catalyst at various temperatures. Overall, Ru + CeO2 releases more heat and is more selective for partial oxidation products at temperatures below 
600 °C than Ni + SDC.
