Highly dispersed Pt species anchored onto NH2-Ce-MOFs and their derived mesoporous catalysts for CO oxidation,Nanoscale

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Highly dispersed Pt species anchored onto NH2-Ce-MOFs and their derived mesoporous catalysts for CO oxidation
Nanoscale ( IF 5.8 ) Pub Date : 2020-10-14 , DOI: 10.1039/d0nr05626j
Zeyi Guo _{1,

2,

3,

4} , Qi You _{1,

2,

3,

4} , Lianghao Song _{2,

3,

4,

5} , Guoxin Sun _{2,

3,

4,

5} , Guozhu Chen _{2,

3,

4,

5} , Cuncheng Li _{2,

3,

4,

5} , Xianfeng Yang _{4,

6,

7,

8} , Xun Hu _{2,

9,

10} , Xuchuan Jiang _{1,

2,

3,

4}

Affiliation

Simultaneously maximizing the dispersion of noble metals and demonstrating optimal activity are of significant importance for designing stable metal catalysts. In this study, highly dispersed ultrafine platinum (Pt) particles with a size of <1.5 nm anchored onto a mesoporous CeO₂ structure have been synthesized by coordinating Pt ions with amino groups in NH₂-Ce-MOFs, followed by high-temperature calcination. It was found that the presence of –NH₂ groups in Ce-MOFs played a crucial role in anchoring Pt species with high dispersion on the MOF framework. Interestingly, the anchored Pt species were beneficial for the formation of Ce–Pt sites during the conversion from Ce-BDC to CeO₂. As a result, the as-prepared catalysts held dense surface peroxo species, responsible for boosting CO oxidation at low temperatures.

中文翻译：

高度分散的Pt物种锚固在NH2-Ce-MOFs及其衍生的中孔催化剂上，用于CO氧化

同时最大程度地提高贵金属的分散性并证明其最佳活性对于设计稳定的金属催化剂具有重要意义。在这项研究中，通过将Pt离子与NH ₂ -Ce-MOFs中的氨基配位，然后进行高温煅烧，合成了尺寸<1.5 nm的高度分散的超细铂（Pt）颗粒，并将其固定在介孔CeO ₂结构上。发现在Ce-MOFs中–NH ₂基团的存在在将高度分散的Pt物种锚定在MOF框架上起着至关重要的作用。有趣的是，在从Ce-BDC转变为CeO _2的过程中，锚定的Pt物种有利于Ce-Pt位点的形成。。结果，所制备的催化剂保持了致密的表面过氧物质，负责在低温下促进CO氧化。

更新日期：2020-11-03

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