Inverse silicon carbide replica of porous glasses

Hoffmann, Claudia; Reinhardt, Bjoern; Enke, Dirk; Kaskel, Stefan

doi:10.1016/j.micromeso.2013.09.019

Cited by 15 publications

(8 citation statements)

References 36 publications

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“…In recent years, researchers have discovered many new methods for synthesizing high specific surface area SiC and SiC matrix composites, 88 and successfully prepared a variety of high specific surface area SiC matrix composites. Li et al 89 designed an advanced SiC-based electrode, which is an ultrathin graphitic carbon film (SiC@C) composed of single-crystalline 3C-SiC nanowire arrays grown on a carbon fiber fabric substrate (Fig.…”

Section: Advanced Novel Semiconductor Materials For Scsmentioning

confidence: 99%

Novel semiconductor materials for advanced supercapacitors

et al. 2023

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Section: Advanced Novel Semiconductor Materials For Scsmentioning

confidence: 99%

Novel semiconductor materials for advanced supercapacitors

et al. 2023

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“…12,13,25 The fumed silica template HDK® H20 (Wacker Chemie AG) and the polymeric silicon carbide precursor SMP-10 (Starfire Systems) have been put in a mortar and were mixed until a homogeneous yellow powder appeared. Typically, 5.0 g of the hydrophobic functionalized SiO 2 (white) and 7.5 g SMP-10 (yellow) were used.…”

Section: Syntheses Of Nanoporous Silicon Carbidesmentioning

confidence: 99%

“…Preparing the silicon carbide systems via a hard-template route combined with the incipient wetness technique was used as already described earlier. 12,13,25 The fumed silica template HDK® H20 (Wacker Chemie AG) and the polymeric silicon carbide precursor SMP-10 (Starfire Systems) were put in a mortar and were mixed until a homogeneous yellow powder was obtained. Typically, 5.0 g of the hydrophobic functionalized SiO 2 (white) and 7.5 g SMP-10 (yellow) were used.…”

Section: Syntheses Of Nanoporous Silicon Carbidesmentioning

confidence: 99%

“…Those act as nanoscaled mould to shape a precursor which can be transformed to the desired product and after SiO 2 removal porous SiC is obtained. [7][8][9][10][11][12][13] Although such preparation methods are known and specific surface areas of several hundred square meter per gram were reported, SiC was used as support only in some applications so far and usually the materials were not porous and hence, had low specific surface areas (<< 100 m 2 g -1 ). [14][15][16][17][18][19][20][21][22][23][24][25][26] Nevertheless, a performance increase in the propane oxidative dehydrogenation was reported by Xu and co-workers compared to conventional supports as alumina or silica.…”

Section: Introductionmentioning

confidence: 99%

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Nanoporous silicon carbide as nickel support for the carbon dioxide reforming of methane

Hoffmann

Plate

Steinbrück

et al. 2015

Catal. Sci. Technol.

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Fumed silica is used as a template in the nanocasting approach towards nanoporous silicon carbide, and it can then be applied as a catalyst support. By varying the pyrolysis temperature between 1000 and 1500°C, the structural parameters of the resulting silicon carbide materials DUT-87 (DUT = Dresden University of Technology) can be controlled. A specific surface of 328 m2 g-1 is obtained. Furthermore, the oxidation behaviour of such nanoporous SiCs is investigated. The materials are distinguished by an impressive thermal stability at 900°C for at least 12 h, which is allowed by the presence of a passive oxidation even for such highly porous SiCs. Hence, nickel (10 wt%) was supported on the fresh DUT-87 as well as controlled oxidized DUT-87preox samples, and the influence of the different support properties on the characteristics of the catalyst samples which are used in the carbon dioxide reforming of methane was investigated. The SiO2 layer on the SiC for the DUT-87preox samples could prevent the formation of nickel silicide to a large extent at temperatures up to 850°C. This resulted in higher activities during the dry reforming of methane at 800°C and the performance of the siliceous supports was significantly exceeded, emphasizing the beneficial effect of SiC. Effective methane reaction rates of 1.2 mmol g-1 s-1 were obtained for KPK1ox which was based on DUT-87 pyrolysed at 1300°C and oxidative treatment prior to nickel insertion. Furthermore, a stable conversion level was reached over the whole time on stream of 8 h

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“…[22][23][24][25] Hoffmann et al also worked on the diversication of the solid templates using for example meso-porous borosilicate glasses instead of silica. 26 Finally, the nanocasting of polycarbosilane in solid matrices allows the elaboration of SiC with various morphologies such as bers, tubes and foams. [27][28][29] However, even though a large diversity of solid templates is available for the nanocasting, the choice of pre-ceramic polymers is restricted.…”

Section: Introductionmentioning

confidence: 99%