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The catalytic oxidation performance of toluene over the Ce-Mn-O(x) catalysts: Effect of synthetic routes #MMPMID31838353
Zhang X; Zhao J; Song Z; Liu W; Zhao H; Zhao M; Xing Y; Ma Z; Du H
J Colloid Interface Sci 2020[Mar]; 562 (?): 170-181 PMID31838353show ga
Ce-Mn-O(x) catalysts were synthesized by impregnation (CM-IM), co-precipitation (CM-CP), citrate sol-gel (CM-SG) and hydrothermal (CM-HT) methods. The synthesis methods exhibited a great impact on the physicochemical properties of catalysts, resulting in different catalytic activity. The catalytic oxidation activity of toluene followed the sequence: CM-HT (T(50): 234 degrees C; T(90): 246 degrees C) > CM-SG (T(50): 242 degrees C; T(90): 249 degrees C) > CM-CP (T(50): 243 degrees C; T(90): 259 degrees C) > CM-IM (T(50): 251 degrees C; T(90): 261 degrees C), which was consistent with the sequence of surface relative percentage of C(ov), Ce(3+), Mn(3+), O(alpha) and r values. Among them, CM-HT showed the best catalytic oxidation performance of toluene due to more structural defects, oxygen vacancies, surface adsorption oxygen, normalized conversion rate and other active species. In addition, CM-HT catalysts showed reliable water resistance and good durability, implying the potential industrial application.