Direct detection as a probe of platinum nanoparticles encapsulated in MFI zeolite nanocrystallite aggregates†

IF 3.2 3区 工程技术 Q2 CHEMISTRY, PHYSICAL
Yaning Liu, Mengxue Gao, Chunming Zhong, Yi Wu, Xiaoyuan Liao, Shuxiang Lv, Yan Jiang, Qiong Li and Yue Yao
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引用次数: 0

Abstract

An X-ray fluorescence spectrometer (XRF) combined with an energy dispersive spectrometer (EDS) offers a wealth of information about the mode of distribution in heterogeneous catalysis for platinum nanoparticles (Pt-NPs) encapsulated in MFI zeolite nanocrystallite aggregates, thus providing a promising probe of their local structure. In this paper, we hydrothermally synthesized a novel microsphere monomer containing encapsulated Pt ZSM-5 nanocrystalline aggregates with a diameter of 5–7 μm, in which the Pt content can be confirmed by direct detection with the difference in detection depths of XRF and EDS. Moreover, the package structure can limit the size of the metal Pt particles, improve the degree of metal dispersion, and obtain high propane conversion (45%) and propylene selectivity (63%) over the long term.

Abstract Image

Abstract Image

作为探针直接检测封装在 MFI 沸石纳米晶聚集体中的铂纳米粒子
X 射线荧光光谱仪(XRF)与能量色散光谱仪(EDS)相结合,为封装在 MFI 沸石纳米晶聚集体中的铂纳米粒子(Pt-NPs)在异相催化过程中的分布模式提供了丰富的信息,从而为探究其局部结构提供了前景。本文通过水热法合成了一种新型微球单体,其中含有直径为 5-7 μm 的封装铂 ZSM-5 纳米晶聚集体,利用 XRF 和 EDS 检测深度的差异,可通过直接检测确认其中的铂含量。此外,这种封装结构还能限制金属铂颗粒的尺寸,提高金属的分散程度,并能长期获得较高的丙烷转化率(45%)和丙烯选择性(63%)。
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
Molecular Systems Design & Engineering
Molecular Systems Design & Engineering Engineering-Biomedical Engineering
CiteScore
6.40
自引率
2.80%
发文量
144
期刊介绍: Molecular Systems Design & Engineering provides a hub for cutting-edge research into how understanding of molecular properties, behaviour and interactions can be used to design and assemble better materials, systems, and processes to achieve specific functions. These may have applications of technological significance and help address global challenges.
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