The effect of the template nature and modification with MnO x on the catalytic efficiency of Ce 0.8 Zr 0.2 O 2 (CZ) in oxidation of CO (2 vol% CO and 1 vol% O 2 in He, pulse feeding) and soot particles (tight contact between soot and catalyst, TGA/DSC) was analyzed. The CZ catalysts were prepared using the CTAB and sawdust (SD) templates and modified with Mn (8 wt%) by wet impregnation followed by calcination at 400 °С. SEM-EDS, XRD, Raman and photoelectron spectroscopy, N 2 adsorption, EPR, TPR-H 2 and catalytic tests results demonstrated better catalytic activity of CZ(SD) in CO oxidation than of CZ(CTAB) because of the biomorphic texture, higher structural defectiveness and improved oxygen mobility of the former catalyst. Low surface reducibility and low concentration of active oxygen species on the CZ(SD) surface deteriorated its catalytic efficiency in the topochemical reaction of soot oxidation. Despite the different structure and degree of interaction between MnO x and CZ, the Mn-modified catalysts showed the similar catalytic properties: much better than of both unmodified catalysts in CO oxidation and worse than of CZ(CTAB) in soot oxidation. Mn 2+ ions incorporated better into the surface layer of CZ(SD) than of CZ(CTAB), for which the inhomogeneous distribution of MnO x and decreased specific surface area were observed.

中文翻译：

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MnOx修饰和模板类型对二氧化铈-氧化锆在CO和烟灰氧化中催化性能的影响

模板性质和MnO x修饰对Ce 0.8 Zr 0.2 O 2（CZ）催化氧化CO（2vol％CO和He中1vol％O 2，脉冲进料）和烟灰颗粒的催化效率的影响分析了烟灰和催化剂之间的紧密接触（TGA / DSC）。使用CTAB和木屑（SD）模板制备CZ催化剂，并通过湿法浸渍，然后在400°C下煅烧，用Mn（8 wt％）改性。SEM-EDS，XRD，拉曼光谱和光电子能谱，N 2吸附，EPR，TPR-H 2和催化测试结果表明，CZ（SD）在CO氧化中的催化活性比CZ（CTAB）更好，这是因为其生物形态织构更高。前催化剂的结构缺陷和改善的氧迁移率。低表面还原性和CZ（SD）表面上活性氧的低浓度降低了其在烟尘氧化的拓扑化学反应中的催化效率。尽管MnO x和CZ之间的结构和相互作用程度不同，但Mn改性的催化剂显示出相似的催化性能：在CO氧化中比未改性的两种催化剂都好，而在烟灰氧化中则比CZ（CTAB）差。Mn 2+离子比CZ（CTAB）更好地结合到CZ（SD）的表面层中，为此观察到MnO x的不均匀分布和比表面积的减小。在CO氧化方面比两种未改性的催化剂好得多，而在烟灰氧化方面比CZ（CTAB）差。Mn 2+离子比CZ（CTAB）更好地结合到CZ（SD）的表面层中，为此观察到MnO x的不均匀分布和比表面积的减小。在CO氧化方面比两种未改性的催化剂好得多，而在烟灰氧化方面比CZ（CTAB）差。Mn 2+离子比CZ（CTAB）更好地结合到CZ（SD）的表面层中，为此观察到MnO x的不均匀分布和比表面积的减小。