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IF 2.3 4区化学 Q3 CHEMISTRY, PHYSICAL

Catalysis Letters Pub Date : 2025-02-12 DOI:10.1007/s10562-025-04942-9

Subhasis Pati, Ashok Jangam

引用次数: 0

摘要

银纳米粒子在低温一氧化碳氧化反应中具有很高的活性。在此，我们报告了通过绿色方法在介孔二氧化硅上分散合成银纳米粒子的情况。利用月桂叶提取物将银纳米粒子分散在介孔二氧化硅上，制备出 2% 的 Ag/SiO2 (G) 催化剂。紫外可见光谱、透射电子显微镜和 X 射线衍射分析证实了催化剂的形成。对 2% Ag/SiO2 (G) 催化剂在填料床反应器中进行 CO 氧化反应的活性进行了测试。该催化剂在低温 CO 氧化反应中表现出优异的活性，在 125 oC 时实现了 100% 的转化率。较高的转化率和持续 100 小时的稳定活性归功于强金属支撑相互作用、纳米颗粒的均匀分散以及易还原金属氧化物的形成。温度编程还原分析证实了强烈的金属支撑相互作用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Green Synthesis of Ag/SiO2 Catalyst for its Application in CO-Oxidation

Silver nanoparticles are highly active for low-temperature CO oxidation reactions. Herein, we report the synthesis of Ag nanoparticles dispersed over mesoporous SiO₂ via a green approach. The Ag nanoparticles were dispersed over mesoporous silica using bay leaf extract to prepare a 2% Ag/SiO₂ (G) catalyst. The formation of the catalyst was confirmed by UV-Vis spectroscopy, transmission electron microscopy and X-ray diffraction analysis. The activity of the 2% Ag/SiO₂ (G) catalyst was tested for CO oxidation reaction in a packed bed reactor. The catalyst showed excellent activity for low-temperature CO oxidation, and 100% conversion was achieved at 125 ^oC. The higher conversion and stable activity for 100 h is ascribed to the strong metal support interaction, homogenous dispersion of nano-particles and formation of easily reducible metal oxides. The strong metal support interaction is confirmed by temperature programmed reduction analysis.

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来源期刊

Catalysis Letters 化学-物理化学

CiteScore

5.70

自引率

3.60%

发文量

327

审稿时长

1 months

期刊介绍： Catalysis Letters aim is the rapid publication of outstanding and high-impact original research articles in catalysis. The scope of the journal covers a broad range of topics in all fields of both applied and theoretical catalysis, including heterogeneous, homogeneous and biocatalysis. The high-quality original research articles published in Catalysis Letters are subject to rigorous peer review. Accepted papers are published online first and subsequently in print issues. All contributions must include a graphical abstract. Manuscripts should be written in English and the responsibility lies with the authors to ensure that they are grammatically and linguistically correct. Authors for whom English is not the working language are encouraged to consider using a professional language-editing service before submitting their manuscripts.