Highly Dispersed Pt Nanoparticles on TiO2 Support Using Fluidic Dynamic Process for Catalytic Oxidation of Ethylene Acetate and Carbon Monoxide

IF 2.3 4区化学 Q3 CHEMISTRY, PHYSICAL

Catalysis Letters Pub Date : 2025-04-15 DOI:10.1007/s10562-025-05018-4

Hong Jun Park, Wonmin Choi, Juwon Seok, Jinwu Jang, Jo Hee Yoon, Bong Gill Choi

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Abstract

Catalytic oxidation is considered an effective technology for removing harmful chemicals without the formation of secondary pollutants. Substrate-supported noble metal catalysts offer superior activity toward carbon monoxide and volatile organic compounds. In this study, a Pt catalyst deposited on a TiO₂ was prepared using a fluid dynamics reactor with a reaction time of less than 5 h. The dynamic mixing process facilitates the uniform distribution of Pt particles on the TiO₂ support, thereby enhancing the interaction between Pt and TiO₂. The as-obtained nanocomposite exhibited a high specific surface area and pore structure, which were favorable for achieving abundant active sites for catalytic oxidation. X-ray photoelectron spectroscopy confirmed the improved electronic properties of Ti, O, and Pt. The catalyst exhibited excellent conversion efficiency (99%) for ethylene acetate and carbon monoxide at high gas hourly space velocities and low temperatures of 222 and 181 °C, respectively. This study provides important insights for overcoming the challenges associated with the uniform dispersion of noble metal nanoparticles in catalytic applications.

Graphical Abstract

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TiO2载体上高分散Pt纳米颗粒催化醋酸乙烯和一氧化碳氧化的流态动力学研究

催化氧化被认为是一种去除有害化学物质而不产生二次污染物的有效技术。底物支撑的贵金属催化剂对一氧化碳和挥发性有机化合物具有优越的活性。本研究利用流体动力学反应器制备了沉积在TiO2上的Pt催化剂，反应时间小于5 h。动态混合过程有利于Pt颗粒均匀分布在TiO2载体上，从而增强了Pt与TiO2的相互作用。所得纳米复合材料具有较高的比表面积和孔隙结构，有利于获得丰富的催化氧化活性位点。x射线光电子能谱证实了Ti， O和Pt的电子性能得到了改善。该催化剂在高气体时空速和222°C和181°C的低温下，对乙酸乙酯和一氧化碳的转化效率达到了99%。这项研究为克服贵金属纳米颗粒在催化应用中均匀分散的挑战提供了重要的见解。图形抽象

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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.