Boosting diethylamine selective oxidation over CuO/ZSM-5 catalyst by CeO2 modification

He, Long; Xu, Hua-hui; Leng, Xing-Yue; Liu, Jin; Jia, Aiping; Luo, Ming; Chen, Jian

doi:10.1016/j.fuel.2023.127792

Cited by 15 publications

(4 citation statements)

References 46 publications

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“…Figure shows the catalytic performance of 15Mn5Ce/ZSM-5 under the addition of 5% H 2 O in the feed gas. The results show that the conversion and T 100 of TEA are basically the same with and without the addition of 5% H 2 O, and the N 2 selectivity with the addition of 5% H 2 O is a little higher than that without 5% H 2 O . It may be because the TEA dissolved in water promoted the reaction, or some of the nitrogen oxides dissolved in water, which causes some errors.…”

Section: Resultsmentioning

confidence: 99%

“…The results show that the conversion and T 100 of TEA are basically the same with and without the addition of 5% H 2 O, and the N 2 selectivity with the addition of 5% H 2 O is a little higher than that without 5% H 2 O. 13 It may be because the TEA dissolved in water promoted the reaction, or some of the nitrogen oxides dissolved in water, which causes some errors. In summary, 15Mn5Ce/ZSM-5 has good water resistance and stable performance.…”

Section: Xps Analysis Of Mn and Ce Species On The Surface Of Xmn(20 −...mentioning

confidence: 98%

“…Consequently, the catalyst exhibited exceptional activity toward ozone decomposition. He13 et al showed that CeO 2 could promote the production of Cu species with high activity for DEA oxidation. Additionally, high selectivity for N 2 over a wide temperature range was produced by synergistic catalysis with active Cu species, Ce 3+ species, as well as acidic sites within ZSM-5.…”

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Selective Oxidation of Triethylamine Catalyzed by Mn-Ce/ZSM-5

Qin

Fan

2023

Langmuir

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The selective catalytic oxidation (SCO) of triethylamine (TEA) to harmless nitrogen (N2), carbon dioxide (CO2), and water (H2O) is of green elimination technology. In this paper, Mn-Ce/ZSM-5 with different proportions of MnO x /CeO x were studied for the selective catalytic combustion of TEA. The catalysts were characterized by XRD, BET, H2-TPR, XPS, and NH3-TPD and their catalytic activities were analyzed. The results showed that MnO x was the main active component. The addition of a small amount of CeO x promotes the generation of high-valence Mn ions, which reduces the reduction temperature of the catalyst and increases the redox capacity of the catalyst. In addition, the synergistic effect between CeO x and MnO x significantly improves the mobility of reactive oxygen species on the catalyst, thus improving the catalytic performance of the catalyst. The catalytic oxidation performance of TEA over 15Mn5Ce/ZSM-5 is the highest. TEA can be completely converted at 220 °C, and the selectivity for N2 is up to 80%. The reaction mechanism was studied by in situ diffuse reflectance infrared Fourier transform spectroscopy (in situ DRIFTS).

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Section: Resultsmentioning

confidence: 99%

Section: Xps Analysis Of Mn and Ce Species On The Surface Of Xmn(20 −...mentioning

confidence: 98%

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confidence: 99%

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Selective Oxidation of Triethylamine Catalyzed by Mn-Ce/ZSM-5

Qin

Fan

2023

Langmuir

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“…Immediate exposure might result in coughing, irritated throat, and difficulty breathing . Direct contact with DEA may cause lasting damage to the respiratory system and eye organs. , Occupational Safety and Health Organization recommends a DEA in the air exposure limit of 25 ppm because, even in small concentrations, DEA gas leakage can pose significant environmental and health concerns . Thus, sensitive and selective DEA gas detection systems are essential.…”

Section: Introductionmentioning

confidence: 99%

Highly Sensitive Diethylamine Detection at Room Temperature Using g-C₃N₄ Nanosheets Decorated with CuO Hollow Polyhedral Structures

Hussain,

Suleiman,

Liu

et al. 2024

Anal. Chem.

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Chemiresistive-based metal oxide semiconductor (MOS) gas sensors are widely used in gas sensing due to their advantageous properties. Graphitic carbon nitride (g-C 3 N 4 ) and metal oxide heterostructure materials can improve charge transport properties, selectivity, and sensitivity in MOS gas sensor materials. Herein, for the first time, CuO hollow polyhedral structures (HPSs) were synthesized via a hydrothermal technique and annealed at different temperatures, with the 400 °C annealed (CuO-400 HPSs) demonstrating remarkable sensing capabilities for diethylamine (DEA) gas at room temperature (RT). The x-g-C 3 N 4 nanosheets were decorated with CuO HPSs in varying amounts (x = 0.8, 1.8, 2.1, and 3.1 wt %) and then annealed at 400 °C for x-g-C 3 N 4 -CuO-400 hollow polyhedral heterostructures (HPHSs). Indeed, among the synthesized samples, the 1.8%-g-C 3 N 4 -CuO-400 HPHSs have a higher sensitivity to DEA (resistance change in gas (R g ) and air (R a ); R g /R a = 65 @ 20 ppm), a low detection limit (R g /R a = 6 @ 500 ppb), wide dynamic response (R g /R a = 190 @ 80 ppm), strong stability (30 days), and 21.6 times higher sensitivity than pure CuO at RT toward 20 ppm of DEA. The exceptional gas-sensing behavior can be attributed to various factors, including controlled annealing conditions that result in the formation of well-defined structures and greater porosity, efficient charge transfer properties resulting from an optimized ratio of g-C 3 N 4 to CuO in HPHSs, an abundance of defects, unsaturated Cu sites, and synergistic effects. The study presents a universal strategy for generating sensitive and selective g-C 3 N 4 -based composite materials for low-temperature gas sensors.

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Efficient selective combustion of n-butylamine on hierarchical Cu-Mn/SAPO-34 catalysts: The effect of mesoporosity and acidity

Xu¹,

Liu²,

Chen³

et al. 2023

Applied Catalysis A: General

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Boosting diethylamine selective oxidation over CuO/ZSM-5 catalyst by CeO2 modification

Cited by 15 publications

References 46 publications

Selective Oxidation of Triethylamine Catalyzed by Mn-Ce/ZSM-5

Selective Oxidation of Triethylamine Catalyzed by Mn-Ce/ZSM-5

Highly Sensitive Diethylamine Detection at Room Temperature Using g-C₃N₄ Nanosheets Decorated with CuO Hollow Polyhedral Structures

Efficient selective combustion of n-butylamine on hierarchical Cu-Mn/SAPO-34 catalysts: The effect of mesoporosity and acidity

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Boosting diethylamine selective oxidation over CuO/ZSM-5 catalyst by CeO2 modification

Cited by 15 publications

References 46 publications

Selective Oxidation of Triethylamine Catalyzed by Mn-Ce/ZSM-5

Selective Oxidation of Triethylamine Catalyzed by Mn-Ce/ZSM-5

Highly Sensitive Diethylamine Detection at Room Temperature Using g-C3N4 Nanosheets Decorated with CuO Hollow Polyhedral Structures

Efficient selective combustion of n-butylamine on hierarchical Cu-Mn/SAPO-34 catalysts: The effect of mesoporosity and acidity

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Highly Sensitive Diethylamine Detection at Room Temperature Using g-C₃N₄ Nanosheets Decorated with CuO Hollow Polyhedral Structures