Diblock Copolymer Core–Shell Nanoparticles as Template for Mesoporous Carbons: Independent Tuning of Pore Size and Pore Wall Thickness

Tkachenko, Vitalii; Ghimbeu, Camélia Matei; Vaulot, Cyril; Josien, Ludovic; Vidal, Loı̈c; Poly, Julien; Chemtob, Abraham

doi:10.1021/acs.langmuir.9b02994

Cited by 9 publications

(5 citation statements)

References 49 publications

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“…All of those processes can be included in soft-templating or endotemplating methods with surfactant and block copolymers and hard-templating or exotemplating methods—that is, nanocasting. The synthesis of ordered, uniform mesopores usually requires using template or structure directors (i.e., porogen agents) in order to define the pores [ 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 ].…”

Section: Introductionmentioning

confidence: 99%

Electrodeposition of Mesoporous Ni-Rich Ni-Pt Films for Highly Efficient Methanol Oxidation

et al. 2020

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The use of soft templates for the electrosynthesis of mesoporous materials has shown tremendous potential in energy and environmental domains. Among all the approaches that have been featured in the literature, block copolymer-templated electrodeposition had robustness and a simple method, but it practically cannot be used for the synthesis of mesoporous materials not based on Pt or Au. Nonetheless, extending and understanding the possibilities and limitations of block copolymer-templated electrodeposition to other materials and substrates is still challenging. Herein, a critical analysis of the role of the solution’s primary electroactive components and the applied potential were performed in order to understand their influences on the mesostructure of Ni-rich Ni-Pt mesoporous films. Among all the components, tetrahydrofuran and a platinum (IV) complex were shown to be crucial for the formation of a truly 3D mesoporous network. The electrosynthesized well-ordered mesoporous Ni-rich Ni-Pt deposits exhibit excellent electrocatalytic performance for methanol oxidation in alkaline conditions, improved stability and durability after 1000 cycles, and minimal CO poisoning.

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Section: Introductionmentioning

confidence: 99%

Electrodeposition of Mesoporous Ni-Rich Ni-Pt Films for Highly Efficient Methanol Oxidation

et al. 2020

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“…36 Through varying the lengths of the copolymer blocks, the internal stability and pore wall thickness can be tuned. 37 However, there are other parameters that directly or indirectly affect the morphologies and general characteristics of SBA-15 materials, such as the operating temperature, pH value, and kind of additives used (like salts, co-surfactants, and swelling agents). Up to now, a large variety of morphologies have been reported for SBA-15, consisting of platelets, spheres, and rods.…”

Section: Silica-based Mesoporous Materialsmentioning

confidence: 99%

Fundamentals and recent progress relating to the fabrication, functionalization and characterization of mesostructured materials using diverse synthetic methodologies

et al. 2020

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“…Templating methods are widely employed for the synthesis of porous carbon materials with tailorable pore size and surface area. These involve the pyrolysis of a carbon precursor and the utilization of a hard [3,20] or a soft [43][44][45][46][47] template. The hard template synthesis is robust and reproducible but requires the downstream removal of the template, usually silica or alumina, which poses the problem of their complete removal even by using Research Article doi.org/10.1002/elsa.202100203 hazardous acids, such as HF, that react well with SiO 2 .…”

Section: Introductionmentioning

confidence: 99%

Mesoporosity and nitrogen doping: The leading effect in oxygen reduction reaction activity and selectivity at nitrogen‐doped carbons prepared by using polyethylene oxide‐block‐polystyrene as a sacrificial template

Mazzucato

Daniel

Perazzolo

et al. 2022

Electrochemical Science Adv

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Four mesoporous carbons (MCs) with tunable pore size were synthesized by soft template synthesis, employing a resorcinol-formaldehyde resin as a carbon precursor and a polyethylene oxide-block-polystyrene block copolymer as a sacrificial template in which the length of the polystyrene block (165, 300, 500, and 1150 units) allowed the modulation of the surface area of MCs (567, 582, 718 and 840 m 2 g −1 , respectively). The complete set of MCs was also doped with nitrogen by ball milling in the presence of cyanamide and stabilized in a second thermal treatment at 750 • C, leading to nitrogen content of ∼2.65% in all samples. The two sets of MCs were used for evaluating both the effect of textural properties and nitrogen doping in the electrochemical reduction of oxygen in acid electrolytes. Each catalyst was characterized by means of elemental analysis and N 2 physisorption analysis, whereas the selected series of samples were also characterized by transmission electron microscopy, scanning electron microscopy, X-ray photoemission spectroscopy, inductively coupled plasma mass spectroscopy (ICP-MS), and Raman analysis. Voltammetric rotating ring-disk measurements in 0.5 M H 2 SO 4 demonstrated that the catalytic activity for the O 2 reduction scales with the surface area in the non-doped series, and also the selectivity for the two-electron process leading to H 2 O 2 increases in the samples having wider pores and higher surface area, even if the leading mechanism is the tetraelectronic process leading to H 2 O. The doping with nitrogen leads to a general increase of the catalytic activity with a shift of the O 2 peak potential to more positive values of 75-150 mV.In the doped series, nitrogen doping prevails on the textural properties for guiding the selectivity toward the two-or four-electron process, since a similar H 2 O 2 yield was observed for all N-MC samples. The possible presence of FeN x sitesThis is an open access article under the terms of the Creative Commons Attribution-NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.

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Diblock Copolymer Core–Shell Nanoparticles as Template for Mesoporous Carbons: Independent Tuning of Pore Size and Pore Wall Thickness

Cited by 9 publications

References 49 publications

Electrodeposition of Mesoporous Ni-Rich Ni-Pt Films for Highly Efficient Methanol Oxidation

Electrodeposition of Mesoporous Ni-Rich Ni-Pt Films for Highly Efficient Methanol Oxidation

Fundamentals and recent progress relating to the fabrication, functionalization and characterization of mesostructured materials using diverse synthetic methodologies

Mesoporosity and nitrogen doping: The leading effect in oxygen reduction reaction activity and selectivity at nitrogen‐doped carbons prepared by using polyethylene oxide‐block‐polystyrene as a sacrificial template

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