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Morphology dependence of Nb2O5-supported cobalt oxide in catalytic toluene oxidation
Catalysis Science & Technology ( IF 4.4 ) Pub Date : 2024-08-06 , DOI: 10.1039/d4cy00596a Shuangju Li 1 , Xueli Cheng 1 , Wei Zhou 2 , Junxiang Jiang 1 , Chao Feng 1 , Yuanshuai Liu 1 , Xuebing Li 3 , Xiaodong Zhang 4 , Zhong Wang 1
Catalysis Science & Technology ( IF 4.4 ) Pub Date : 2024-08-06 , DOI: 10.1039/d4cy00596a Shuangju Li 1 , Xueli Cheng 1 , Wei Zhou 2 , Junxiang Jiang 1 , Chao Feng 1 , Yuanshuai Liu 1 , Xuebing Li 3 , Xiaodong Zhang 4 , Zhong Wang 1
Affiliation
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This research describes the preparation of cobalt-based catalysts supported on Nb2O5 substrates of various forms: rods (Nb2O5-R), grids (Nb2O5-G), and spherical structures (Nb2O5-S). These catalysts demonstrated diverse reactivity in toluene oxidation, which correlated with their individual physical and chemical traits and the interfacial interaction between cobalt oxide and the Nb2O5 support. Notably, the catalyst with a spherical Nb2O5 support (CoOx/Nb2O5-S) outperformed the catalysts with other supports and showed the best activity in oxidizing toluene. The investigation underscored the role of the unique features of the Nb2O5 substrate in augmenting the catalyst's efficacy in toluene adsorption and activation. Density functional theory (DFT) revealed more facile toluene adsorption on CoOx/Nb2O5-S (−0.65 eV) and reduced energy requirements for oxygen vacancy creation and adsorption. This suggested that the CoOx/Nb2O5-S catalyst enhanced surface oxygen mobility and boosted catalytic efficiency.
中文翻译:
Nb2O5 负载氧化钴催化甲苯氧化的形貌依赖性
本研究描述了负载在各种形式的 Nb 2 O 5基底上的钴基催化剂的制备:棒状 (Nb 2 O 5 -R)、网格 (Nb 2 O 5 -G) 和球形结构 (Nb 2 O 5 - S)。这些催化剂在甲苯氧化中表现出不同的反应活性,这与其各自的物理和化学特性以及氧化钴和Nb 2 O 5载体之间的界面相互作用相关。值得注意的是,具有球形Nb 2 O 5载体的催化剂(CoO x /Nb 2 O 5 -S)的性能优于具有其他载体的催化剂,并且在氧化甲苯方面表现出最好的活性。该研究强调了 Nb 2 O 5基质的独特特性在增强催化剂吸附和活化甲苯功效方面的作用。密度泛函理论 (DFT) 揭示了 CoO x /Nb 2 O 5 -S (-0.65 eV) 上更容易吸附甲苯,并降低了氧空位产生和吸附的能量需求。 这表明CoO x /Nb 2 O 5 -S催化剂增强了表面氧迁移率并提高了催化效率。
更新日期:2024-08-06
中文翻译:
![](https://scdn.x-mol.com/jcss/images/paperTranslation.png)
Nb2O5 负载氧化钴催化甲苯氧化的形貌依赖性
本研究描述了负载在各种形式的 Nb 2 O 5基底上的钴基催化剂的制备:棒状 (Nb 2 O 5 -R)、网格 (Nb 2 O 5 -G) 和球形结构 (Nb 2 O 5 - S)。这些催化剂在甲苯氧化中表现出不同的反应活性,这与其各自的物理和化学特性以及氧化钴和Nb 2 O 5载体之间的界面相互作用相关。值得注意的是,具有球形Nb 2 O 5载体的催化剂(CoO x /Nb 2 O 5 -S)的性能优于具有其他载体的催化剂,并且在氧化甲苯方面表现出最好的活性。该研究强调了 Nb 2 O 5基质的独特特性在增强催化剂吸附和活化甲苯功效方面的作用。密度泛函理论 (DFT) 揭示了 CoO x /Nb 2 O 5 -S (-0.65 eV) 上更容易吸附甲苯,并降低了氧空位产生和吸附的能量需求。 这表明CoO x /Nb 2 O 5 -S催化剂增强了表面氧迁移率并提高了催化效率。