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Article

Methane Combustion Using Pd Deposited on CeOx-MnOx/La-Al2O3 Pellistors

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Laboratory of Atomic Structures and Defects in Advanced Materials, National Institute of Materials Physics, Atomistilor 405A, 077125 Magurele, Romania
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NANOM-MEMS SRL, G. Cosbuc 9, 505400 Rasnov, Romania
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Laboratory of Nanoscale Condensed Matter, National Institute of Materials Physics, Atomistilor 405A, 077125 Magurele, Romania
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Laboratory of Multifunctional Materials and Structures, National Institute of Materials Physics, Atomistilor 405A, 077125 Magurele, Romania
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Author to whom correspondence should be addressed.
Materials 2020, 13(21), 4888; https://doi.org/10.3390/ma13214888
Received: 9 October 2020 / Revised: 26 October 2020 / Accepted: 27 October 2020 / Published: 30 October 2020
Pd deposited on CeOx-MnOx/La-Al2O3 has been prepared as a sensitive material for methane (CH4) 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 CH4. 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 CeOx-MnOx/La-Al2O3 exhibited the highest selective-sensitivity in the benefit of CH4 detection against threshold limits of carbon monoxide (CO), sulfur dioxide (SO2) and hydrogen sulfide (H2S). Accordingly, adjusting the percent of Pd makes the preparation strategies of pellistors good candidates towards CH4 detection. View Full-Text
Keywords: CH4 catalytic combustion; Pd deposited CeOx-MnOx/La-Al2O3; selective catalytic reduction; pellistors CH4 catalytic combustion; Pd deposited CeOx-MnOx/La-Al2O3; selective catalytic reduction; pellistors
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MDPI and ACS Style

Florea, O.G.; Stănoiu, A.; Gheorghe, M.; Cobianu, C.; Neaţu, F.; Trandafir, M.M.; Neaţu, Ş.; Florea, M.; Simion, C.E. Methane Combustion Using Pd Deposited on CeOx-MnOx/La-Al2O3 Pellistors. Materials 2020, 13, 4888. https://doi.org/10.3390/ma13214888

AMA Style

Florea OG, Stănoiu A, Gheorghe M, Cobianu C, Neaţu F, Trandafir MM, Neaţu Ş, Florea M, Simion CE. Methane Combustion Using Pd Deposited on CeOx-MnOx/La-Al2O3 Pellistors. Materials. 2020; 13(21):4888. https://doi.org/10.3390/ma13214888

Chicago/Turabian Style

Florea, Ovidiu G., Adelina Stănoiu, Marin Gheorghe, Cornel Cobianu, Florentina Neaţu, Mihaela M. Trandafir, Ştefan Neaţu, Mihaela Florea, and Cristian E. Simion. 2020. "Methane Combustion Using Pd Deposited on CeOx-MnOx/La-Al2O3 Pellistors" Materials 13, no. 21: 4888. https://doi.org/10.3390/ma13214888

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