《Table 3Quantitative analysis for H2‐TPR profiles of the fresh and K‐poisoning catalysts.》

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《"Ce~(4+),Zr~(4+)共掺杂提高V_2O_5-WO_3/TiO_2催化剂脱硝性能及抗K中毒能力（英文）"》

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XPS measurements were performed to better understand the chemical state of vanadium on the surface of these V‐based catalysts，and the results are presented in Fig.7.According to literature，the binding energies of V5+，V4+，and V3+are in the ranges of 516.4–517.2，515.7–516.2，and 515.2–515.7 e V，re‐spectively[38，39].The ratio of V5+is 38.0%（Table 4）for the VWTCZ catalyst，which is higher than that of the VWT catalyst.When K is introduced，the V5+ratio of the catalysts decreases，especially in the VWT catalyst（decrease from 36.8%to 20.0%in Table 4）.Topsoe et al.[40]reported that the decrease in V5+caused the deterioration in the redox properties of the catalyst.Therefore，the addition of K leads to decreased activity.How‐ever，the reduction in the VWTCZ catalyst is slight（decrease from 38.0%to 34.4%，as shown in Table 4），indicating that the co‐doping of Ce4+and Zr4+could effectively reduce the effect of K on the redox properties of the catalyst.This result is con‐sistent with the results of H2‐TPR.