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使用沉积在CeO-MnO/La-AlO测氧仪上的钯进行甲烷燃烧。

Methane Combustion Using Pd Deposited on CeO-MnO/La-AlO Pellistors.

作者信息

Florea Ovidiu G, Stănoiu Adelina, Gheorghe Marin, Cobianu Cornel, Neaţu Florentina, Trandafir Mihaela M, Neaţu Ştefan, Florea Mihaela, Simion Cristian E

机构信息

Laboratory of Atomic Structures and Defects in Advanced Materials, National Institute of Materials Physics, Atomistilor 405A, 077125 Magurele, Romania.

NANOM-MEMS SRL, G. Cosbuc 9, 505400 Rasnov, Romania.

出版信息

Materials (Basel). 2020 Oct 30;13(21):4888. doi: 10.3390/ma13214888.

DOI:10.3390/ma13214888
PMID:33143340
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7663723/
Abstract

Pd deposited on CeO-MnO/La-AlO has been prepared as a sensitive material for methane (CH) detection. The effect of different amounts (1.25%, 2.5% and 5%) of Pd loading has been investigated. The as prepared materials were deposited on Pt microcoils using a drop-coating method, as a way of developing pellistors operated using a Wheatstone bridge configuration. By spanning the operating temperature range between 300 °C and 550 °C, we established the linearity region as well as the maximum sensitivity towards 4900 ppm of CH. By making use of the sigmoid dependence of the output voltage signal from the Wheatstone bridge, the gas surface reaction and diffusion phenomena have been decoupled. The pellistor with 5% Pd deposited on CeO-MnO/La-AlO exhibited the highest selective-sensitivity in the benefit of CH detection against threshold limits of carbon monoxide (CO), sulfur dioxide (SO) and hydrogen sulfide (HS). Accordingly, adjusting the percent of Pd makes the preparation strategies of pellistors good candidates towards CH detection.

摘要

沉积在CeO-MnO/La-AlO上的钯已被制备为用于检测甲烷（CH₄）的敏感材料。研究了不同负载量（1.25%、2.5%和5%）的钯的影响。采用滴涂法将制备好的材料沉积在铂微线圈上，以此开发采用惠斯通电桥配置运行的热膜电阻气体传感器。通过在300℃至550℃的工作温度范围内进行测试，我们确定了线性区域以及对4900 ppm CH₄的最大灵敏度。利用惠斯通电桥输出电压信号的S形依赖性，对气体表面反应和扩散现象进行了解耦。沉积在CeO-MnO/La-AlO上的含5%钯的热膜电阻气体传感器在检测CH₄时，相对于一氧化碳（CO）、二氧化硫（SO₂）和硫化氢（H₂S）的阈值限制表现出最高的选择性灵敏度。因此，调整钯的百分比使得热膜电阻气体传感器的制备策略成为检测CH₄的良好候选方案。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/329b/7663723/0b1d1e081847/materials-13-04888-g009.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/329b/7663723/221316739688/materials-13-04888-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/329b/7663723/0b1d1e081847/materials-13-04888-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/329b/7663723/6c83910b03be/materials-13-04888-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/329b/7663723/8e6a4301cc7f/materials-13-04888-g002.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/329b/7663723/a51723cec93b/materials-13-04888-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/329b/7663723/84af632275f8/materials-13-04888-g005.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/329b/7663723/221316739688/materials-13-04888-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/329b/7663723/0b1d1e081847/materials-13-04888-g009.jpg

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