Tuning of nitrogen-doped carbon nanotubes as catalyst support for liquid-phase reaction

Chizari, Kambiz; Janowska, Izabela; Houllé, Matthieu; Florea, Ileana; Ersen, Ovidiu; Romero, Thierry; Bernhardt, Pierre; Ledoux, Marc J.; Pham‐Huu, Cuong

doi:10.1016/j.apcata.2010.03.031

Cited by 203 publications

(102 citation statements)

References 40 publications

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“…4, Pd/N-C-SiC-800 has the smallest Pd particle size (2-3 nm) among all these samples. Chizari et al [24] also observed that N doped CNTs benefited dispersion of Pd particles compared to the undoped CNTs and the resulting catalyst exhibited a better activity in cinnamaldehyde hydrogenation. In addition, the reaction rates represented by turn over frequency (TOF) per atom of exposed Pd are listed in Table S3.…”

mentioning

confidence: 91%

Modulation of the textures and chemical nature of C–SiC as the support of Pd for liquid phase hydrogenation

Pan

Zhou

et al. 2013

Carbon

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mentioning

confidence: 91%

Modulation of the textures and chemical nature of C–SiC as the support of Pd for liquid phase hydrogenation

Pan

Zhou

et al. 2013

Carbon

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“…The N-CNT obtained at the high temperature of 800°C with ammonia contains the highest amount of quaternary groups, but the lowest amount of nitrogen on the surface exhibits enhanced kinetic currents and electrocatalytic activity [77] than the undoped CNT. The nitrogen incorporation also strongly improved the stability and selectivity toward the C = C bond hydrogenation exhibiting much higher and significant improvement of the hydrogenation compared to those observed on the N-free CNT catalysts [25,118].…”

Section: Electrochemical Modificationmentioning

confidence: 81%

“…Copyright doping) to the p-type conduction (B substitution of boron in lattice) [21]. To solve the dispersion problem and to enhance the reactivity, the CNTs have been modified and functionalized for their application in electronics [22][23][24], clinical and biomedical [23], liquid-phase reactions [25], power sources filed [26][27][28] as nanoenergetic materials [29], and as gas sensors [30][31][32]. For the purpose of this review, we will also focus their representative/promising applications in the described fields covering from building materials to biological materials and from the electrical devices to the high nanoenergetic materials.…”

Section: Figure 2 (A)mentioning

confidence: 99%

Synthesis and electrochemical applications of nitrogen-doped carbon nanomaterials

Majeed¹,

Zhao²,

Zhang³

et al. 2013

Nanotechnology Reviews

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Abstract:Nitrogen doping is an effective way to tailor the properties of the shaped carbon materials, including the nanotubes, nanocups, nanofibers, as well as the nanorods, and render their potential use for various applications. The common bonding configurations obtained on the N insertion is the pyridinic N and pyrrolic N, which impart the characteristic properties to these carbon materials. This review will focus on the nitrogen-doped carbon materials, the doping effect on the electrochemistry of the doped nanomaterials, and the various synthetic methods to introduce N into the carbon network. The potential applications of the N-doped materials are also reviewed on the basis of the experimental and theoretical studies in electrochemistry.

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“…The peak at 398.6-399.9 eV is unambiguously assigned to pyridinic nitrogen with the sp 2 -hybridized nitrogen atoms, which are bonded to two carbon atoms. 10,12,13,35 The peak at 400-400.5 eV corresponds to nitrogen substitution as pentagonal pyrrolic nitrogen. 5,16,18 The peak at 401.5-403.1 eV, can be attributed to the quaternary or graphitic-like nitrogen, which are the highly coordinated nitrogen atoms substituting carbon atoms on the graphene layers and bonded each to three carbon atoms.…”

Section: Synthesized N-cnts At Different Temperatures (750-950mentioning

confidence: 99%

“…[38][39][40] The peak at 406.1-407.3 corresponds to gaseous nitrogen (N 2 ), which is encapsulated in the cavities of nanotubes or absorbed on the surface of tube walls. 6,10,41,42 Table III shows the surface relative atomic composition (at. %) of selected N-CNTs detected by XPS.…”

Section: Synthesized N-cnts At Different Temperatures (750-950mentioning

confidence: 99%

Influence of the Synthesis Parameters in Carbon Nanotubes Doped with Nitrogen for Oxygen Electroreduction

González

Valenzuela-Muñiz

Alonso-Núñez

et al. 2017

ECS J. Solid State Sci. Technol.

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Nitrogen doped carbon nanotubes (N-CNTs) were synthesized by modified chemical vapor deposition method using a novel two steps thermal technique. Pyridine was used as carbon and nitrogen source and ferrocene as catalyst for nanotubes growth. The effects of reactor temperature and carrier gas flow were investigated using scanning electron microscopy, transmission electron microscopy, Raman spectroscopy, X-ray photoelectron spectroscopy and linear scan voltammetry. Results show that the synthesis temperature and gas flow rate have influence on the physical, chemical and electrochemical properties of the nanostructures. Microscopy studies exhibit that synthesis temperature modify the length, yield and diameter of the N-CNTs. Transmission microscopy electron images show multiwalled carbon nanotubes with the typical bamboo like structures. High temperature and low flow rate generate more defects, as revealed by Raman analyses. N-CNTs synthesized at the highest temperature and flow rate show better electrocatalytic activity toward oxygen reduction reaction with promising lower onset potential and current densities up to 80% when compared to traditional Pt/C. The favorable performance is attributed to the higher nitrogen content and the type of nitrogen species, mainly pyrrolic and pyridinic incorporated in the carbon lattice. For the last decades, platinum (pure and Pt alloys) has been the best and well known electrocatalyst for the oxidation and reduction reactions in fuel cells. However, scarcity, high price and degradation of platinum as catalyst in fuel cell represent a challenge for commercial proposes.1,2 In recent years, there have been efforts to reduce the platinum loading, or even to eliminate it from the electrodes. It is therefore necessary to develop non-Pt catalytic materials available, cheap and electroactive to replace the precious metal. Carbon nanotubes doped with nitrogen (N-CNTs) have reached the point to become an alternative catalyst for oxygen reduction reaction (ORR) in fuel cells cathode. 3 There have been many studies concerning the synthesis of carbon nanotubes doped with nitrogen atoms using different carbon-nitrogen precursors using chemical vapor deposition (CVD) method and having a good electrocatalytic activity for oxygen reduction. Alexeyeva 4 synthesized N-CNTs using acetonitrile as carbon and nitrogen sources. They studied the electrocatalytic reduction of oxygen with and without doped nanotubes in 0.5M H 2 SO 4 solution where the N-CNTs show significantly more activity for ORR than the free-doping nanotubes. Wong 2 obtained N-CNTs through CVD technique using three different chemical precursors as nitrogen sources: aniline (A), diethylamine (DEA) and ethylenediamine. The analysis revealed that the N-CNTs obtained from EDA with 6.5 at. % N was more active for ORR in acidic medium than nanotubes from A and DEA with 5.9 at. % N and 4.3 at. % N, respectively. Other studies 1,[5][6][7][8] have also showed the important role of nitrogen precursors on the N-CNTs structure. Nevertheless, few...

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Tuning of nitrogen-doped carbon nanotubes as catalyst support for liquid-phase reaction

Cited by 203 publications

References 40 publications

Modulation of the textures and chemical nature of C–SiC as the support of Pd for liquid phase hydrogenation

Modulation of the textures and chemical nature of C–SiC as the support of Pd for liquid phase hydrogenation

Synthesis and electrochemical applications of nitrogen-doped carbon nanomaterials

Influence of the Synthesis Parameters in Carbon Nanotubes Doped with Nitrogen for Oxygen Electroreduction

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