Nitrogen-doped one-dimensional (1D) macroporous carbonaceous nanotube arrays and their application in electrocatalytic oxygen reduction reactions

She, Xilin; Yang, Dongjiang; Jing, Dengwei; Fang, Yuan; Yang, Weiyou; Guo, Liejin; Che, Yanke

doi:10.1039/c4nr03340j

Cited by 54 publications

(40 citation statements)

References 38 publications

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“…3b), the high-resolution C 1s core-level spectrum could be deconvoluted into three peaks centered at $284.9, $285.9, and $289.2 eV, which was indexed to C]C/C-C, C-OH and C-O-Ni, respectively. [36][37][38] The sharpest peak corresponding to C]C/C-C indicated that most of the carbon atoms were in the form of a conjugated honeycomb lattice. The O 1s spectrum is deconvoluted into two peaks (Fig.…”

Section: -7mentioning

confidence: 99%

Facile synthesis of hollow hierarchical Ni@C nanocomposites with well-dispersed high-loading Ni nanoparticles embedded in carbon for reduction of 4-nitrophenol

et al. 2018

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Hollow hierarchical Ni@C nanocomposites with highly dispersed Ni nanoparticles (NPs) embedded in wellgraphitized carbon matrix have been synthesized by solid-state pyrolysis of simple, well-defined organicinorganic layered nickel hydroxide. The integration of highly dispersed Ni NPs, high Ni NPs content (up to $88.01 wt%), well-graphitized carbon as well as strong Ni/carbon interaction in the Ni@C make them display excellent catalytic activity and stable magnetic recyclability toward the reduction of 4-nitrophenol by NaBH 4 .The development of more efficient and stable catalysts has been an increasingly important goal for chemists and materials scientists for both economic and environmental reasons. As efficient and cost-effective non-noble metal, Ni NPs have attracted much attention owing to their potential applications in electronic or optical materials, as well as in catalysis.1-3 In general, the overall performance of Ni NPs depends heavily upon the size, shape and dispersion. It is widely accepted that a higher catalytic activity can be achieved by increasing the surface area of the specic active phase of the catalysts through reducing the size of the corresponding catalytic particles. 4-7However, due to their high surface area to volume ratio, Ni NPs are typically unstable and tend to sinter into larger species, especially at high metal contents, which results in a dramatic decrease in catalytic activity and selectivity. It is thus highly important to prepare stable Ni NPs with uniform dispersion and narrow size distribution to promote their catalytic activities.Over the past decades, embedding of Ni NPs inside the porous supports has been proved to enhance catalytic activity and impede nanoparticle sintering. [8][9][10][11][12][13][14][15] The advantages of carbon supports with respect to conventional oxidic supports, like silica and zirconia, involve the high specic surface area, high stability, intrinsic high electrical conductivity, as well as easy recovery of metal active phases from spent catalysts by burning away carbon. To date, various methods for preparing carbon-supported Ni NPs have been developed. [16][17][18][19][20][21][22] In particular, incipient wetness impregnation and coprecipitation are commonly used methods to prepare these supported catalysts. It is well known that traditional carbons (including activated carbon, carbon nanotubes, graphene and carbon nanobers) are poor in functional groups and a complex functionalization pre-treatment (such as acid oxidation, ionic liquid linking or polymer wrapping) is always required. In addition, the excess reducing regents are also needed for the reduction of Ni NPs. Although a high dispersion of Ni NPs on porous carbon can be achieved by employing this methods, this tedious post-synthetic method renders instable catalysts with dispersed Ni NPs on the external surface or near pore mouths and Ni NPs still have a tendency to be sintered, especially at high metal loading or high temperature, resulting in a signicant loss of reactivity because of...

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Section: -7mentioning

confidence: 99%

Facile synthesis of hollow hierarchical Ni@C nanocomposites with well-dispersed high-loading Ni nanoparticles embedded in carbon for reduction of 4-nitrophenol

et al. 2018

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“…For instance, recently, by using a co-pyrolysis route of Fe-Phthalocyanine loaded and PEO20-PPO70-PEO20 (P123) retained in mesoporous silica, Wang et al [34] synthesized NCNTs with well-defined morphology and graphitic structure, which exhibited good performance for ORR. Based on CVD, She et al fabricated N-doped 1D macroporous carbonaceous nanotube arrays in anodic alumina oxide (AAO) template, which also showed high performance for ORR [27]. In addition to the precursors and pyrolysis temperatures, for each method, other factors, such as time, gas flow rate, catalysts, also have significant influence on the nitrogen contents and the accurately controlled doping sites [17,28,39,40].…”

Section: In Situ Dopingmentioning

confidence: 99%

“…The typical in situ doping techniques include high-temperature arc-discharge [21,22], chemical vapor deposition (CVD) [23][24][25][26][27], chemically solvothermal procedures (ca. 230-300 °C), [28] and laser ablation methods [29,30].…”

Section: In Situ Dopingmentioning

confidence: 99%

Nitrogen-Doped Carbon Nanotube and Graphene Materials for Oxygen Reduction Reactions

et al. 2015

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Nitrogen-doped carbon materials, including nitrogen-doped carbon nanotubes (NCNTs) and nitrogen-doped graphene (NG), have attracted increasing attention for oxygen reduction reaction (ORR) in metal-air batteries and fuel cell applications, due to their optimal properties including excellent electronic conductivity, 4e − transfer and superb mechanical properties. Here, the recent progress of NCNTs-and NG-based catalysts for ORR is reviewed. Firstly, the general preparation routes of these two N-doped carbon-allotropes are introduced briefly, and then a special emphasis is placed on the developments of both NCNTs and NG as promising metal-free catalysts and/or catalyst support materials for ORR. All these efficient ORR electrocatalysts feature a low cost, high durability and excellent performance, and are thus the key factors in accelerating the widespread commercialization of metal-air battery and fuel cell technologies. OPEN ACCESSCatalysts 2015, 5 1575

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“…According to theoretical calculation and experimental observation, an appropriate porous structure with large surface area is available to improve the ORR activity of N-doped carbon materials [1,2,[11][12][13]. Therefore, many strategies have been contributed to increasing the porosity and surface area of NNMCs by means of high specific surface area carbon materials (e.g., mesoporous carbon, graphene, carbon nanotube) [5,6,10], sacrificial inorganic hard templates (including ordered mesoporous silica, nano silicon, nano metal oxides) [2,[12][13][14][15], high specific surface area precursor materials (especially for the series of metal-organic frameworks, e.g., MOFs: MOF-5, Al-PCP, ZIF-8) [11,[16][17][18][19], and other miscellaneous techniques [2,5]. In spite of many advantages, such traditional synthesis routes for the porous carbon material typically involve multi-step procedures including syntheses of various hard templates, followed by the immersion of N-carbon precursors and the carbonization at high temperature, and then the removal of the inorganic matrix via strong alkali or acidic.…”

Section: Introductionmentioning

confidence: 99%

Improved oxygen reduction activity of porous carbon materials by self-doping nitrogen derived from PVP with urea as a promoter

Zhang

Amiinu

et al. 2015

Electrochimica Acta

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Nitrogen-doped one-dimensional (1D) macroporous carbonaceous nanotube arrays and their application in electrocatalytic oxygen reduction reactions

Cited by 54 publications

References 38 publications

Facile synthesis of hollow hierarchical Ni@C nanocomposites with well-dispersed high-loading Ni nanoparticles embedded in carbon for reduction of 4-nitrophenol

Facile synthesis of hollow hierarchical Ni@C nanocomposites with well-dispersed high-loading Ni nanoparticles embedded in carbon for reduction of 4-nitrophenol

Nitrogen-Doped Carbon Nanotube and Graphene Materials for Oxygen Reduction Reactions

Improved oxygen reduction activity of porous carbon materials by self-doping nitrogen derived from PVP with urea as a promoter

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