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运用 X R D 、 T P R 及 T P O 技术研究了 Zr O2 负载过渡金属氧化物 Cu Ox 、 Fe Ox 、 Co O x 、 Ni Ox 、 Mn O x 和 Cr Ox 的物相结构、还原和氧化性能,并以 C O 氧化反应为探针考察了催化剂的氧化活性。结果表明, 过渡金属- Zr O2 之间的相互作用,阻止了载体 Zr O2 从无定形 Zr O2 →四方 Zr O2 →混合相→稳定的单斜 Zr O2 的转变和 Zr O2 颗粒的增长,并导致过渡金属氧化物在 Zr O2 表面的高度分散。催化剂的氧化- 还原性能随载体上负载的过渡金属氧化物的不同而不同, C O 氧化活性顺序为: Cu O x > Co O x > Mn Ox > Fe O x > Ni O x > Cr O x 。
The phase structure, reduction and oxidation properties of ZrO 2 supported transition metal oxides Cu Ox, Fe Ox, Co O x, Ni Ox, Mn O x and Cr Ox were investigated by XRD, T P R and T P O techniques The oxidation activity of the catalyst was investigated by using C O oxidation as a probe. The results show that the interaction between the transition metal and ZrO 2 prevents the transformation of ZrO 2 from amorphous ZrO 2 → tetragonal ZrO 2 → mixed phase → stable monoclinic ZrO 2 and the growth of ZrO 2 particles and leads to the transition The metal oxide is highly dispersed on the ZrO 2 surface. The oxidation-reduction behavior of the catalysts varies with the supported transition metal oxides. The order of C O oxidation activity is: Cu O x> Co O x> Mn Ox> Fe O x> Ni O x> Cr O x.