Catalytic Combustion of Lean Methane Assisted by Electric Field over Pd/Co3O4 Catalysts at Low Temperature

Liu, Ke; Li, Ké; Xu, Dejun; Lin, He; Guan, Bin; Chen, Ting; Huang, Zhen

doi:10.1007/s12204-018-2017-7

Cited by 9 publications

(2 citation statements)

References 49 publications

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“…36,58,68 The potential would further activate the chemisorbed oxygen, enhancing the surface reaction of eq 4, which is similar to the recently published enhanced catalyst reaction by electric field. 69 Therefore, all the enhanced ethanol adsorption, rh-phase stabilization, rh(104) facet exposure, and enhanced surface reaction by Sr doping contribute to the high ethanol sensing performance of the homojunction c-In 2 O 3 /rh-In 2 O 3 NWs.…”

Section: Resultsmentioning

confidence: 99%

Sr-Doped Cubic In₂O₃/Rhombohedral In₂O₃ Homojunction Nanowires for Highly Sensitive and Selective Breath Ethanol Sensing: Experiment and DFT Simulation Studies

Song

Dou

Wang

et al. 2019

ACS Appl. Mater. Interfaces

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In recent years, it is urgent and challenging to fabricate highly sensitive and selective gas sensors for breath analyses. In this work, Sr-doped cubic In 2 O 3 /rhombohedral In 2 O 3 homojunction nanowires (NWs) are synthesized by one-step electrospun technology. The Sr doping alters the cubic phase of pure In 2 O 3 into the rhombohedral phase, which is verified by the high-resolution transmittance electron microscopy, X-ray diffraction, and Raman spectroscopy, and is attributable to the low cohesive energy as calculated by the density functional theory (DFT). As a proof-of-concept of fatty liver biomarker sensing, ethanol sensors are fabricated using the electrospun In 2 O 3 NWs. The results show that 8 wt % Sr-doped In 2 O 3 shows the highest ethanol sensing performance with a high response of 21−1 ppm, a high selectivity over other interfering gases such as methanol, acetone, formaldehyde, toluene, xylene, and benzene, a high stability measured in 6 weeks, and also a high resistance to high humidity of 80%. The outstanding ethanol sensing performance is attributable to the enhanced ethanol adsorption by Sr doping as calculated by DFT, the stable rhombohedral phase and the preferred (104) facet exposure, and the formed homojunctions favoring the electron transfer. All these results show the effective structural modification of In 2 O 3 by Sr doping, and also the great potency of the homojunction Sr-doped In 2 O 3 NWs for highly sensitive, selective, and stable breath ethanol sensing.

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Section: Resultsmentioning

confidence: 99%

Sr-Doped Cubic In₂O₃/Rhombohedral In₂O₃ Homojunction Nanowires for Highly Sensitive and Selective Breath Ethanol Sensing: Experiment and DFT Simulation Studies

Song

Dou

Wang

et al. 2019

ACS Appl. Mater. Interfaces

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“…Using relatively aggressive activations, successful conversions of 1000−10,000 ppmv methane (0.1−1% CH 4 , with 10% or less oxygen) at temperatures well below the ignition point (600 °C50 ) have been recorded 31,33,34,36,38 with a few demonstrating conversion temperatures as low as 300 °C. 32,35 While the reaction temperatures we observed are moderately lower than previous demonstrations, the dramatically different activation procedures and simplified catalyst synthesis offer unique benefits. As a point of comparison, conversion efficiencies to CO 2 are not often reported and cannot be directly compared to our results; nevertheless, methanol production rates in previous studies have been quite low (order 0.1−0.3 mol methanol per mol Cu or less; 26 methanol production was not systematically quantified in our study, but early spot checks in the two-step process revealed around 1−2 orders of magnitude lower methanol in the post-reaction, water-extracted catalyst, where the input methane was around 10 6 -fold lower than in previous studies).…”

Section: Methane Conversion Approachmentioning

confidence: 69%

Atmospheric- and Low-Level Methane Abatement via an Earth-Abundant Catalyst

et al. 2021

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Climate action scenarios that limit changes in global temperature to less than 1.5 °C require methane controls, yet there are no abatement technologies effective for the treatment of lowlevel methane. Here, we describe the use of a biomimetic copper zeolite capable of converting atmospheric-and low-level methane at relatively low temperatures (e.g., 200−300 °C) in simulated air. Depending on the duty cycle, 40%, over 60%, or complete conversion could be achieved (via a two-step process at 450 °C activation and 200 °C reaction or a short and long activation under isothermal 310 °C conditions, respectively). Improved performance at longer activation was attributed to active site evolution, as determined by X-ray diffraction. The conversion rate increased over a range of methane concentrations (0.00019−2%), indicating the potential to abate methane from any sub-flammable stream. Finally, the uncompromised catalyst turnover for 300 h in simulated air illustrates the promise of using low-cost, earth-abundant materials to mitigate methane and slow the pace of climate change.

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Low Temperature Oxidation of Benzene Over Pd/Co3O4 Catalysts in the Electric Field

Shen

Zhao

et al. 2020

Catal Lett

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Catalytic Combustion of Lean Methane Assisted by Electric Field over Pd/Co3O4 Catalysts at Low Temperature

Cited by 9 publications

References 49 publications

Sr-Doped Cubic In₂O₃/Rhombohedral In₂O₃ Homojunction Nanowires for Highly Sensitive and Selective Breath Ethanol Sensing: Experiment and DFT Simulation Studies

Sr-Doped Cubic In₂O₃/Rhombohedral In₂O₃ Homojunction Nanowires for Highly Sensitive and Selective Breath Ethanol Sensing: Experiment and DFT Simulation Studies

Atmospheric- and Low-Level Methane Abatement via an Earth-Abundant Catalyst

Low Temperature Oxidation of Benzene Over Pd/Co3O4 Catalysts in the Electric Field

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Catalytic Combustion of Lean Methane Assisted by Electric Field over Pd/Co3O4 Catalysts at Low Temperature

Cited by 9 publications

References 49 publications

Sr-Doped Cubic In2O3/Rhombohedral In2O3 Homojunction Nanowires for Highly Sensitive and Selective Breath Ethanol Sensing: Experiment and DFT Simulation Studies

Sr-Doped Cubic In2O3/Rhombohedral In2O3 Homojunction Nanowires for Highly Sensitive and Selective Breath Ethanol Sensing: Experiment and DFT Simulation Studies

Atmospheric- and Low-Level Methane Abatement via an Earth-Abundant Catalyst

Low Temperature Oxidation of Benzene Over Pd/Co3O4 Catalysts in the Electric Field

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Product

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Sr-Doped Cubic In₂O₃/Rhombohedral In₂O₃ Homojunction Nanowires for Highly Sensitive and Selective Breath Ethanol Sensing: Experiment and DFT Simulation Studies

Sr-Doped Cubic In₂O₃/Rhombohedral In₂O₃ Homojunction Nanowires for Highly Sensitive and Selective Breath Ethanol Sensing: Experiment and DFT Simulation Studies