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An efficient defect engineering strategy to enhance catalytic performances of Co3O4 nanorods for CO oxidation.
Journal of Hazardous Materials ( IF 12.2 ) Pub Date : 2020-03-16 , DOI: 10.1016/j.jhazmat.2020.122540
Bo Feng 1 , Meng Shi 1 , Junxian Liu 2 , Xinchen Han 1 , Zijie Lan 1 , Huajun Gu 1 , Xiaoxu Wang 1 , Huamin Sun 1 , Qingxiao Zhang 1 , Hexing Li 1 , Yun Wang 2 , Hui Li 1
Affiliation  

Catalytic oxidation of CO at ambient temperature is an important reaction for many environmental applications. Here, we employed a defect engineering strategy to design an extraordinarily effective Sn-doped Co3O4 nanorods (NRs) catalyst for CO oxidation. Our combined theoretical and experimental data demonstrated that Co2+ in the lattice of Co3O4 were substituted by Sn4+. Based on a variety of characterizations and kinetic studies, this catalyst was found to combine the advantages of the nanorod-like morphology for largely exposing catalytically active Co3+ sites and the promotional effect of Sn dopant for adjusting the textural/redox properties. Additionally, the Sn-substituted Co3O4 NRs can be further activated via heat treatment to achieve low-temperature CO oxidation (T100 ∼ -100 °C) with excellent stability at ambient temperature. This study reveals the importance of Sn-substitution of inactive Co2+ in Co3O4 and provides an ultra-efficient catalyst for CO oxidation, making this robust material one of the most powerful catalysts available up to now.

中文翻译:

一种有效的缺陷工程策略,可增强Co3O4纳米棒对CO氧化的催化性能。

在许多环境应用中,环境温度下CO的催化氧化是重要的反应。在这里,我们采用了一种缺陷工程策略来设计一种非常有效的掺Sn的Co3O4纳米棒(NRs)催化剂,用于CO氧化。我们结合的理论和实验数据表明,Co3O4晶格中的Co2 +被Sn4 +取代。基于各种表征和动力学研究,发现该催化剂结合了纳米棒状形态的优势,可在很大程度上暴露催化活性的Co3 +位点和Sn掺杂剂对调节质构/氧化还原特性的促进作用。此外,可以通过热处理进一步活化Sn取代的Co3O4 NRs,以实现低温CO氧化(T100〜-100°C),并在环境温度下具有出色的稳定性。
更新日期:2020-03-16
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