Surface oxygen vacancy vs oxygen storage capacity in cubic ceria based nanocatalysts for low temperature catalytic combustion of fuels

IF 5.9 3区工程技术 Q1 CHEMISTRY, MULTIDISCIPLINARY

Journal of Industrial and Engineering Chemistry Pub Date : 2024-05-11 DOI:10.1016/j.jiec.2024.05.018

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Abstract

A series of praseodymium (Pr) doped cubic ceria nanoparticles (CeO₂ NPs) with different ratio of cerium (Ce) and ‘Pr’ was synthesized by hydrothermal method. Manganese (‘Mn’) doped cubic CeO₂ NPs with 10:90 ratio of Mn:Ce and undoped cubic CeO₂ NPs have also been synthesized. The crystalline structure of the synthesized nanomaterials has been studied by powder X-Ray diffraction (XRD) and Rietveld analysis. In the Raman spectrum, the intensity of F_2g signal at 450–460 cm⁻¹ decreased while the intensity of extrinsic vacancy at 570–580 cm⁻¹ increased by doping with ‘Pr’ or ‘Mn’ in cubic CeO₂ nanocrystals. X-ray photoelectron spectroscopy (XPS) results showed that surface oxygen vacancy of cubic CeO₂ NPs increased by doping with 25 % of ‘Pr’. The ‘Pr’ doped CeO₂ NPs (Pr:Ce = 25:75) exhibited higher surface adsorption dynamic oxygen storage capacity (OSC_Dyn), while the ‘Mn’ doped cubic CeO₂ NPs (Mn:Ce = 10:90) showed increased bulk lattice OSC_Dyn. The ‘Pr’ doped cubic CeO₂ NPs (Pr:Ce = 25:75) exhibited better low temperature catalytic combustion activity, and their nanodispersion in mineral turpentine oil (MTO) added liquefied petroleum gas (LPG) exhibited better fuel efficiency with a flame temperature of 912 °C.

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用于燃料低温催化燃烧的立方氧化铈基纳米催化剂的表面氧空位与储氧能力比较

通过水热法合成了一系列掺杂镨（Pr）的立方氧化铈纳米粒子（CeO2 NPs），铈（Ce）和镨（Pr）的比例各不相同。此外，还合成了锰（Mn）掺杂的立方 CeO2 NPs（Mn:Ce 的比例为 10:90）和未掺杂的立方 CeO2 NPs。通过粉末 X 射线衍射 (XRD) 和里特维尔德分析法研究了合成纳米材料的晶体结构。在拉曼光谱中，立方 CeO2 纳米晶体中掺入 "Pr "或 "Mn "后，450-460 cm-1 处的 F2g 信号强度降低，而 570-580 cm-1 处的外空位强度增加。X 射线光电子能谱（XPS）结果表明，掺入 25% 的 "Pr "后，立方 CeO2 纳米粒子的表面氧空位增加。掺杂'Pr'的 CeO2 NPs（Pr:Ce = 25:75）显示出更高的表面吸附动态储氧能力（OSCDyn），而掺杂'Mn'的立方 CeO2 NPs（Mn:Ce = 10:90）显示出更高的体格 OSCDyn。掺杂 "Pr "的立方 CeO2 NPs（Pr:Ce = 25:75）表现出更好的低温催化燃烧活性，它们在矿物松节油（MTO）添加液化石油气（LPG）中的纳米分散表现出更好的燃料效率，火焰温度达到 912 ℃。

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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来源期刊

Journal of Industrial and Engineering Chemistry 工程技术-工程：化工

CiteScore

10.40

自引率

6.60%

发文量

639

审稿时长

29 days

期刊介绍： Journal of Industrial and Engineering Chemistry is published monthly in English by the Korean Society of Industrial and Engineering Chemistry. JIEC brings together multidisciplinary interests in one journal and is to disseminate information on all aspects of research and development in industrial and engineering chemistry. Contributions in the form of research articles, short communications, notes and reviews are considered for publication. The editors welcome original contributions that have not been and are not to be published elsewhere. Instruction to authors and a manuscript submissions form are printed at the end of each issue. Bulk reprints of individual articles can be ordered. This publication is partially supported by Korea Research Foundation and the Korean Federation of Science and Technology Societies.