Grirem Advanced Materials Co., Ltd.

Grirem Hi-tech Co., Ltd.

Rare Earth Functional Materials (xiong'an) Innovation Center Co., Ltd.

Qiang Zhong

Xiaowei Huang

Yongke Hou

Meisheng Cui

Lei Wang

Hao Wang

Qi Wang

Hongwei Li

He Fang Zhang

Zongyu Feng

Yongqi Zhang

Mei Yue

Zhizhe Zhai

The present invention discloses a rare-earth-manganese/cerium-zirconium-based composite compound, a method for preparing the same, and a use thereof. The composite compound is of a core-shell structure with a general formula expressed as: A REBO-(1-A)CeZrMO, wherein 0.1≤A≤0.3, preferably 0.1≤A≤0.2; a shell layer has a main component of rare-earth manganese oxide with a general formula of REMnO, wherein RE is a rare-earth element or a combination of more than one rare-earth elements, and B is Mn or a combination of Mn and a transition metal element, 1≤a≤8, 2≤b≤18, and 0.25≤c≤4; and a core has a main component of cerium-zirconium composite oxide with a general formula of CeZrMO, wherein M is one or more non-cerium rare-earth elements, 0.1≤x≤0.9, 0≤y≤0.3, and 0.01≤z≤0.3. The composite compound enhances an oxygen storage capacity of a cerium-zirconium material through an interface effect, thereby increasing a conversion rate of a nitrogen oxide.

Rare-earth-manganese/cerium-zirconium-based composite compound, method for preparing same and use thereof

Provided are a cerium-zirconium composite oxide, a preparation method therefor and application of a catalyst. The cerium-zirconium composite oxide has a composite phase structure, and comprises a cerium oxide phase and a cerium-zirconium solid solution phase, or consists of two or more cerium-zirconium solid solution phases with different crystal structures and different chemical compositions, wherein the chemical formula of the cerium-zirconium solid solution phase is CeZrMO, where M is at least one selected from the group consisting of a rare earth element other than cerium, a transition metal element and an alkaline earth metal element, x is 15-85 mol %, and y is 0-20 mol %.

Cerium-zirconium composite oxide, preparation method therefor, and application of catalyst

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Beijing, China

Qiang Zhong