Surface phenomenon of CeO2-added V2O5/TiO2 catalyst based chemical vapor condensation (CVC) for enhanced selective catalytic reduction at low temperatures

Cha, Woojoon; Ehrman, Sheryl H.; Jurng, Jongsoo

doi:10.1016/j.cej.2016.06.072

Cited by 17 publications

(10 citation statements)

References 24 publications

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“…The product was obtained by centrifugation, washing, drying, calcining in an inert environment at 5008C for 3 h. The final product was named as Fe-Beta@-CeO 2 -1. The thickness of CeO 2 shells can be conveniently controlled by tuning the concentration of Ce(NO 3 ) 3 and HMT. Fe-Beta@CeO 2 -2 was synthesized in a similar method, except changing Ce(NO 3 ) 3 /HMT amount to 0.16 g Ce(NO 3 ) 3 and 0.12 g of HMT.…”

Section: Catalyst Preparationmentioning

confidence: 99%

“…Hundred milligram of as-prepared Fe-Beta nanocomposite was dispersed in a 100 mL mixed solution of water/ethanol (v/v 5 1), and then 1 g PVP powder was added in the above solution and stirred until completely dissolved. Afterward, 0.08 g Ce(NO 3 ) 3 and 0.06 g of HMT were added in turn, and continued to stir and reflux for 2 h at 608C. The product was obtained by centrifugation, washing, drying, calcining in an inert environment at 5008C for 3 h. The final product was named as Fe-Beta@-CeO 2 -1.…”

Section: Catalyst Preparationmentioning

confidence: 99%

“…The concentration of NO x (NO x 5 NO 1 NO 2 ) in the inlet and outlet gas was determined by a flue gas analyzer (Model-4000VM, SIGNAL international Ltd., UK). Meanwhile, NH 3 and N 2 O were monitored by a FTIR spectrometer (Nicolet IS50). The conversion of NO x was defined as follow…”

Section: Activity Measurementsmentioning

confidence: 99%

“…25 On the other hand, the weak acid of CNTs is unbeneficial to the adsorption and activation of NH 3 . By contrast, Beta zeolite possesses a stronger acidity and better hydrothermal stability.…”

Section: Introductionmentioning

confidence: 99%

“…Sultana et al 12 reported that Cu promoted Fe-ZSM-5 catalyst can improve its low-temperature SCR catalytic performance. Jiang et al 13 proposed a Ce doping Fe-Beta catalyst to be employed for NO x reduction by NH 3 , which exhibited an enhancement of hydrothermal stability and SO 2 resistance. Chen and coworkers 14 confirmed that Ce modified CuFe-Beta catalyst showing enhanced activity and stability for NH 3 -SCR reaction.…”

Section: Introductionmentioning

confidence: 99%

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Fe‐Beta@CeO₂ core‐shell catalyst with tunable shell thickness for selective catalytic reduction of NO_x with NH₃

Liu

Zhao

et al. 2017

AIChE Journal

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A series of core-shell structural deNO x catalysts using small-grain Beta supporting FeO x nanoparticles as the core and tunable CeO 2 thin film thickness as sheaths were designed and controllably synthesized. Their catalytic performances were tested for selective catalytic reduction of NO x with NH 3 (NH 3 -SCR). It was found that CeO 2 shell thickness plays an important role in influencing the acidity and redox properties of the catalysts. Fe-Beta@CeO 2 core-shell catalysts exhibit excellent resistance to H 2 O and SO 2 and high NO x conversion (above 90%) in the wide temperature range (225-5658C). The kinetics result indicates that the coating of CeO 2 shell significantly increases the pore diffusion resistance of Fe-Beta@CeO 2 catalysts. Furthermore, in situ DRIFT results reveal that CeO 2 shell can promote the formation of NO 2 and cis-N 2 O 2 2 species. But too thick CeO 2 shell ($20 nm) would result in the formation of inactive nitrate species, and thereby lead to a decrease of high-temperature activity of the catalysts.

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Section: Catalyst Preparationmentioning

confidence: 99%

Section: Catalyst Preparationmentioning

confidence: 99%

Section: Activity Measurementsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Fe‐Beta@CeO₂ core‐shell catalyst with tunable shell thickness for selective catalytic reduction of NO_x with NH₃

Liu

Zhao

et al. 2017

AIChE Journal

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The Role of Cation Vacancies in Electrode Materials for Enhanced Electrochemical Energy Storage: Synthesis, Advanced Characterization, and Fundamentals

Gao

Chen

Gong

et al. 2020

Advanced Energy Materials

175

107

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The incorporation of atomic scale defects, such as cation vacancies, in electrode materials is considered an effective strategy to improve their electrochemical energy storage performance. In fact, cation vacancies can effectively modulate the electronic properties of host materials, thus promoting charge transfer and redox reaction kinetics. Such defects can also serve as extra host sites for inserted proton or alkali cations, facilitating the ion diffusion upon electrochemical cycling. Altogether, these features may contribute to improved electrochemical performance. In this review, the latest progress in cation vacancies‐based electrochemical energy storage materials, covering the synthetic approaches to incorporate cation vacancies and the advanced techniques to characterize such vacancies and identify their fundamental role, are provided from the chemical and materials point of view. The key challenges and future opportunities for cation vacancies‐based electrochemical energy storage materials are also discussed, particularly focusing on cation‐deficient transition metal oxides (TMOs), but also including newly emerging materials such as transition metal carbides (MXenes).

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Conventional and New Materials for Selective Catalytic Reduction (SCR) of NO_x

2018

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It is important and necessary to minimize NOx pollutant released into the atmosphere owing to the harmful environmental and health effects brought by NOx emission. Many techniques are available to reduce NOx emission, among of them, Selective Catalytic Reduction (SCR) is considered as one of the most efficient techniques. Conventional SCR systems involve ammonia (NH3) or urea (CO(NH2)2) as a reducing reagent to reduce NOx to N2 and H2O at high temperatures 300–400 °C. Research on developing novel low‐temperature catalysts (LTC) for SCR of NOx still remains of interest. This work reviewed and compared conventional SCR catalysts with newly emerging Metal‐Organic‐Frame (MOFs) materials as potential alternatives for SCR catalysts.

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Surface phenomenon of CeO2-added V2O5/TiO2 catalyst based chemical vapor condensation (CVC) for enhanced selective catalytic reduction at low temperatures

Cited by 17 publications

References 24 publications

Fe‐Beta@CeO₂ core‐shell catalyst with tunable shell thickness for selective catalytic reduction of NO_x with NH₃

Fe‐Beta@CeO₂ core‐shell catalyst with tunable shell thickness for selective catalytic reduction of NO_x with NH₃

The Role of Cation Vacancies in Electrode Materials for Enhanced Electrochemical Energy Storage: Synthesis, Advanced Characterization, and Fundamentals

Conventional and New Materials for Selective Catalytic Reduction (SCR) of NO_x

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Surface phenomenon of CeO2-added V2O5/TiO2 catalyst based chemical vapor condensation (CVC) for enhanced selective catalytic reduction at low temperatures

Cited by 17 publications

References 24 publications

Fe‐Beta@CeO2 core‐shell catalyst with tunable shell thickness for selective catalytic reduction of NOx with NH3

Fe‐Beta@CeO2 core‐shell catalyst with tunable shell thickness for selective catalytic reduction of NOx with NH3

The Role of Cation Vacancies in Electrode Materials for Enhanced Electrochemical Energy Storage: Synthesis, Advanced Characterization, and Fundamentals

Conventional and New Materials for Selective Catalytic Reduction (SCR) of NOx

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Product

Resources

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Fe‐Beta@CeO₂ core‐shell catalyst with tunable shell thickness for selective catalytic reduction of NO_x with NH₃

Fe‐Beta@CeO₂ core‐shell catalyst with tunable shell thickness for selective catalytic reduction of NO_x with NH₃

Conventional and New Materials for Selective Catalytic Reduction (SCR) of NO_x