*2.4. Catalytic Activity*

Five samples of Ag doped CeO2, pure CeO2 and pure Ag2O catalytic coatings were separately deposited on stainless steel foils for evaluation of catalytic activity. For measurement of the amount of combusted soot, annealing tests were performed by placing the catalytic samples covered with soot into an oven and measuring the weight loss of the samples over 2 h in the temperature range of 300–490 ◦C in ambient atmosphere. The molar ratio of catalysts to carbon was approximately 1:80 with average soot mass of 0.7 g. The annealing measurements were repeated 5 times to evaluate reproducibility of the prepared catalysts.
