Enhanced plasma-catalytic decomposition of toluene over Co–Ce binary metal oxide catalysts with high energy efficiency

Bo, Zheng; Zhu, Jinhui; Yang, Shiling; Yang, Huachao; Yan, Jun; Cen, Kefa

doi:10.1039/c9ra00794f

Cited by 26 publications

(17 citation statements)

References 58 publications

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“…More specifically, the percentage of O A /O on the CoCeO x surface increased significantly from 33.8 to 51.4% after RE metal doping, as shown in Table , which suggests the occurrence of changes in the physical and/or electronic structure owing to the enhanced interaction between Co–O and Ce–O . According to previously reported data, surface adsorbed oxygen species (O A ) is more reactive than lattice oxygen (O L ) owing to its better mobility, which plays a significant role in the complete degradation of pollutants and the resistance to chlorine or sulfur poisoning. , Thus, CoCeREO x catalysts with higher reactivity can be expected as a result of RE metal doping.…”

Section: Resultsmentioning

confidence: 54%

“…39,40 For CoCeREO x , RE metal doping slightly shifted the reduction peaks of Co 3 O 4 to a higher temperature, which may be related to its increased crystallite size, thus inhibiting the formation of reducible sites. 41 Meanwhile, except for CoCeYO x , a similar upward shift of the surface CeO 2 reduction temperature was observed. According to a previous report, 32 by the absence of the corresponding reduction peaks of CoCeREO x −M and the upward shift of their bulk Co 3 O 4 reduction peaks (Figure S3).…”

Section: Methodsmentioning

confidence: 57%

“…For CoCeREO x , RE metal doping slightly shifted the reduction peaks of Co 3 O 4 to a higher temperature, which may be related to its increased crystallite size, thus inhibiting the formation of reducible sites . Meanwhile, except for CoCeYO x , a similar upward shift of the surface CeO 2 reduction temperature was observed.…”

Section: Resultsmentioning

confidence: 80%

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Effect of Rare Earth Metal (RE = La, Pr, Nd, Y) Doping on Co–Ce Composite Oxide and Its Application in Catalytic Combustion of Chlorobenzene

Zhu

Pan

Liu

et al. 2020

Ind. Eng. Chem. Res.

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Rare earth metal (RE = La, Pr, Nd, Y)-doped CoCeO x catalysts were prepared and evaluated for eliminating chlorobenzene (CB). Characterization results showed that the doped RE metal simultaneously acts as a structural and electronic assistant, which changes the coordination environment of Ce ions and enhances the interaction between Co and Ce species, thus improving the catalytic performance and chlorine resistance of CoCeO x . Besides, dynamic “redox gears” based on the Co/Ce redox couples were proposed. RE metal doping was found to promote the movement of “gears”, which led to increased surface active oxygen and oxygen mobility, accelerating the complete oxidation of CB and the rapid removal of deposited chlorine. CoCeYO x exhibited the best redox-promoting effect, with 90% CB conversion observed at 256 °C and reduced generation of dichlorobenzene. Moreover, the effect of gaseous oxygen on the CB oxidation process was also studied.

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Section: Resultsmentioning

confidence: 54%

Section: Methodsmentioning

confidence: 57%

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Effect of Rare Earth Metal (RE = La, Pr, Nd, Y) Doping on Co–Ce Composite Oxide and Its Application in Catalytic Combustion of Chlorobenzene

Zhu

Pan

Liu

et al. 2020

Ind. Eng. Chem. Res.

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Section: Resultsmentioning

confidence: 99%

“…[4,11,28] Additionally, the 2.0 wt% Pt/Co 2.73 Zr 0.27 O 4 catalyst possess the highest Co 2+ /Co total ratio when compared with the other catalysts (Table S2, Supporting Information), which indicates that this catalyst possesses the highest concentration of oxygen vacancies. [35] Furthermore, the O 1s signal of the catalysts, as shown in Figure 5b, includes three fitted peaks. The peaks labeled as O 1 , O 2 , and O 3 , centered at 529.7-529.9, 531.5-531.6, and 533.0-533.1 eV, are indexed to latticed oxygen (O 2− ), surface oxygen vacancies (O v ), and surface adsorbed hydroxyl species, respectively.…”

Section: Analyses Of the Surface Oxygen Vacancies And Chemical Statesmentioning

confidence: 95%

Nanocage‐Shaped Co₃₋_xZr_xO₄ Solid‐Solution Supports Loaded with Pt Nanoparticles as Effective Catalysts for the Enhancement of Toluene Oxidation

Wang

Chen

et al. 2020

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Nanocage‐shaped Co3−xZrxO4 solid‐solution supports and the corresponding platinum loaded nanocomposites, yPt/Co3−xZrxO4 (x =0.27, 0.50, 0.69; y = 0.5, 1.0, 2.0 wt.%), are successfully fabricated via a Cu2O nanocube hard template method and a glycol reduction method, respectively. The hollow nanocage structures obviously improve surface areas; moreover, the Zr doping forms the Co3−xZrxO4 solid‐solution supports, and the corresponding yPt/Co3−xZrxO4 catalysts promote the enhancement of catalytic performance. Catalytic activity toward toluene combustion is enhanced for the 2.0 wt% Pt/Co2.73Zr0.27O4 catalyst. The catalysts are characterized using multiple techniques. Pt nanoparticles are uniformly dispersed across the Co2.73Zr0.27O4 nanocage surface. The 2.0 wt% Pt/Co2.73Zr0.27O4 catalyst exhibits the highest catalytic activity among all the samples and demonstrates good stability, with 90% toluene conversion obtained at a temperature of 165 °C. The same catalyst accomplishes full toluene oxidation at 180 °C, at a weight hourly space velocity of 36 000 mL h−1 g−1. The apparent activation energy (Ea) over the yPt/Co2.73Zr0.27O4 samples are significantly lower than those over the Co3−xZrxO4 supports, with the 2.0 wt% Pt/Co2.73Zr0.27O4 catalyst exhibiting the lowest Ea value. These findings demonstrate the potential of the 2.0 wt% Pt/Co2.73Zr0.27O4 catalyst as a promising catalyst toward atmospheric toluene removal.

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Structured Cerium–Manganese Catalysts Supported on Nickel Foam for Toluene Oxidation by Electric Internal Heating

Zhang,

Wu,

Gao

et al. 2023

ChemPlusChem

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Structured catalysts are widely used in catalytic oxidation of gaseous pollutants, hot catalysis is usually needed to assist the reaction in the catalytic process. In this paper, a Ce modified manganese oxide octahedral molecular sieves (Ce‐OMS‐2) structured catalyst supported on foam nickel was prepared through impregnation process. And a systematically quantitative testing on the toluene catalytic oxidation effectiveness of this structured catalyst was conducted through catalyst evaluation device, combining a series of characterization methods such as XRD, SEM, the structure‐activity relationship was established. Assisted with electric internal heating and ozone oxidation environments, this structured catalyst exhibits excellent catalytic oxidation performance for oxidative decomposition of toluene even under high humidity conditions. The results showed that the ozone‐coupled structured nickel foam catalyst increased the decomposition efficiency of toluene from 25% (Without catalyst and heating) to 55% (With catalyst and without heating) and the internal heating can significantly improve the reactivity and moisture resistance of the structured nickel foam catalyst, at 90%RH and 40000h‐1, 50000 ppb O3 and 40mg/m3 toluene was maintained 100% catalytic efficiency. The high efficiency non‐precious metal based electrothermal catalyst prepared in this paper is expected to have certain enlightenment for the purification of VOCs.

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Enhanced plasma-catalytic decomposition of toluene over Co–Ce binary metal oxide catalysts with high energy efficiency

Abstract: This work demonstrates highly efficient plasma-catalytic decomposition of toluene over Co–Ce binary metal oxide catalysts with superior energy efficiency.

Cited by 26 publications

References 58 publications

Effect of Rare Earth Metal (RE = La, Pr, Nd, Y) Doping on Co–Ce Composite Oxide and Its Application in Catalytic Combustion of Chlorobenzene

Effect of Rare Earth Metal (RE = La, Pr, Nd, Y) Doping on Co–Ce Composite Oxide and Its Application in Catalytic Combustion of Chlorobenzene

Nanocage‐Shaped Co₃₋_xZr_xO₄ Solid‐Solution Supports Loaded with Pt Nanoparticles as Effective Catalysts for the Enhancement of Toluene Oxidation

Structured Cerium–Manganese Catalysts Supported on Nickel Foam for Toluene Oxidation by Electric Internal Heating

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Enhanced plasma-catalytic decomposition of toluene over Co–Ce binary metal oxide catalysts with high energy efficiency

Abstract: This work demonstrates highly efficient plasma-catalytic decomposition of toluene over Co–Ce binary metal oxide catalysts with superior energy efficiency.

Cited by 26 publications

References 58 publications

Effect of Rare Earth Metal (RE = La, Pr, Nd, Y) Doping on Co–Ce Composite Oxide and Its Application in Catalytic Combustion of Chlorobenzene

Effect of Rare Earth Metal (RE = La, Pr, Nd, Y) Doping on Co–Ce Composite Oxide and Its Application in Catalytic Combustion of Chlorobenzene

Nanocage‐Shaped Co3−xZrxO4 Solid‐Solution Supports Loaded with Pt Nanoparticles as Effective Catalysts for the Enhancement of Toluene Oxidation

Structured Cerium–Manganese Catalysts Supported on Nickel Foam for Toluene Oxidation by Electric Internal Heating

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Nanocage‐Shaped Co₃₋_xZr_xO₄ Solid‐Solution Supports Loaded with Pt Nanoparticles as Effective Catalysts for the Enhancement of Toluene Oxidation