FeN nanoparticles confined in carbon nanotubes for CO hydrogenation

Yang, Zhiqiang; Guo, Shujing; Pan, Xiulian; Wang, Junhu; Bao, Xinhe

doi:10.1039/c1ee01428e

Cited by 104 publications

(74 citation statements)

References 29 publications

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“…Briefly, aqueous solution of Fe(NO 3 ) 3 was introduced into the CNT channels by utilizing the capillary forces of CNTs aided by ultrasonication and stirring. Following controlled drying at 140 • C in air, a reported temperature-programmed-reaction (TPRe) method was adapted for the nitridation of these precursors to obtain iron nitride [11]. The sample was heated in a quartz tube reactor at 450 • C for 2 h in 50 ml/min ammonia stream.…”

Section: Catalyst Preparationmentioning

confidence: 99%

“…The catalysts were prepared following the previously reported procedure [7,11,[26][27][28]. Briefly, aqueous solution of Fe(NO 3 ) 3 was introduced into the CNT channels by utilizing the capillary forces of CNTs aided by ultrasonication and stirring.…”

Section: Catalyst Preparationmentioning

confidence: 99%

“…Since then, not much work continues on iron nitride catalysts and there is only limited knowledge. We recently incorporated iron nitride (FeN) nanoparticles into the channels of carbon nanotubes (CNTs) and used them as a catalyst for light olefin synthesis from syngas [11]. Confinement inside CNTs facilitated formation of cubic iron nitride with a high N content (50 at.% N).…”

Section: Introductionmentioning

confidence: 99%

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FeN particles confined inside CNT for light olefin synthesis from syngas: Effects of Mn and K additives

et al. 2012

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Section: Catalyst Preparationmentioning

confidence: 99%

Section: Catalyst Preparationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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FeN particles confined inside CNT for light olefin synthesis from syngas: Effects of Mn and K additives

et al. 2012

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“…In addition, the channels of CNT may provide an environment to prolong the contact time of the reactants with metal component inside the tubes, leading to higher selectivity to + 5 C hydrocarbons. The catalytic performance of cubic iron nitride NPs inside and outside CNT was also in accordance to the confinement effect as expected [135]. A striking enhancement of the catalytic activity of Rh-Mn particles confined inside CNTs for the conversion of syngas to C 2 oxygenates was also reported [136].…”

Section: Carbon Support Effectmentioning

confidence: 53%

Fischer-Tropsch synthesis nanostructured catalysts: understanding structural characteristics and catalytic reaction

Zhai

Sun

Zhu

et al. 2013

Nanotechnology Reviews

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One key goal of heterogeneous catalysis study is to understand the correlation between the catalyst structure and its corresponding catalytic activity. In this review, we focus on recent strategies to synthesize well-defined Fischer-Tropsch synthesis (FTS) nanostructured catalysts and their catalytic performance in FTS. The development of those promising catalysts highlights the potentials of nanostructured materials to unravel the complex and dynamic reaction mechanism, particularly under the in situ reaction conditions. The crucial factors associated with the catalyst compositions and structures and their effects on the FTS activities are discussed with an emphasis on the role of theoretical modeling and experimental results.

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“…[7] The rigid nanotubes exert as patial restriction on the metal particles, hampering their aggregation,a nd develop interactions between the encapsulatedm olecules and the nanotube surfaces ( Figure 1c). [8] Bao reported that confining metal nanoparticles inside CNTsr esultsi ni mproved catalytic activity with respect to the same metals deposited on the CNTse xterior surface. [9] Our group demonstrated that Ni nanoparticles confined in Al 2 O 3 nanotubes and also embedded in the cavities of the inner walls of Al 2 O 3 nanotubes have striking catalytic performance in hydrogenation reactions.…”

mentioning

confidence: 99%

Ultrathin Coating of Confined Pt Nanocatalysts by Atomic Layer Deposition for Enhanced Catalytic Performance in Hydrogenation Reactions

Wang

Gao

Zhang

et al. 2016

Chemistry A European J

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What is the most significant result of this study? In this work, atomic layer deposition (ALD) was applied to deposit ultrathin Al 2 O 3 coats on Pt nanoparticles that are confined in Al 2 O 3 nanotubes. This catalyst was elaborately designed to maximize the metal oxide interfaces and exhibited the maximized catalytic activity compared with the conventional confined catalysts and/or supported catalysts. We believe that applying ALD ultrathin coats on confined catalysts is ap romising way to achieve enhanced performance for other catalysts. What prompted you to investigate this topic/problem? Metal-support interfaces play ap rominent role in heterogeneous catalysis. However,t ailoring the metal-support interfaces to realize full utilization remains am ajor challenge. Our previous work has demonstrated that metal nanoparticles not only confined in the nanotubes but also embedded in the internal wall have increased interfacial sites compared with the same metal nanoparticles supported on the outside of the nanotubes. This result prompted us to further modify the confined catalysts for the increased interfaces. Therefore, we attempt to coat the confined catalysts with an ultrathin coating to maximize the metal-support interfaces. What was the biggest surprise? In the course of the study,w es urprisingly found that the ALD cycle number of ultrathin coats has ah uge effect on the hydroge-nation activity.T he catalyst with two cycles Al 2 O 3 coatings showed significantly higher activity (about five times) than that of the un-coated catalyst. However,a fter further depositing only three cycles of Al 2 O 3 coatings ,t he activity of the catalyst sharply decreased to 1:10 of the uncoated catalyst. This result indicates that the metal-support interfaces have as trong effect on the performance of the catalyst and that ap recise and optimal cycle numbers for ALD Al 2 O 3 is necessary for the maximized interfaces. What future opportunities do you see (in the light of the results presented in this paper)? The method of coating the confined catalysts can be extended to other catalytic systems in which the metal-support interfaces have astrong effect on the catalytic performance. Invited for the cover of this issue is the group of Yong Qin at the Chinese Academy of Sciences. The image depicts the main features of the designed catalyst, whicha re the Al 2 O 3 nanotubes, confined Pt nanoparticles, and ultrathin Al 2 O 3 coats. Read the full textoft he article at

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FeN nanoparticles confined in carbon nanotubes for CO hydrogenation

Cited by 104 publications

References 29 publications

FeN particles confined inside CNT for light olefin synthesis from syngas: Effects of Mn and K additives

FeN particles confined inside CNT for light olefin synthesis from syngas: Effects of Mn and K additives

Fischer-Tropsch synthesis nanostructured catalysts: understanding structural characteristics and catalytic reaction

Ultrathin Coating of Confined Pt Nanocatalysts by Atomic Layer Deposition for Enhanced Catalytic Performance in Hydrogenation Reactions

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