New topotactic synthetic route to mesoporous silicon carbide

Silicon carbide with tunable ordered mesoporosity

“…Shi et al recently demonstrated the efficiency of magnesium in lowering the temperature of synthesis of SiC down to 700 °C [12]. In the same time-frame, we introduced SBA-15 and 3D Stöber matrix as hard template and successfully synthesized meso and macroporous SiCs using a similar magnesio-thermal reduction at 800 °C [13]. During the process, reduced silicon oxide (SiO x ) diffuses into carbon, unfortunately causing a partial collapsing of the original framework and a loss of the ordered arrangement of the pristine template.…”

“…Mesoporous silicon carbide was synthesized by using Mg as reducing agent at moderate temperature as described in our recent work [13]. Briefly, in a glove box filled with Ar, carbon/SiO 2 composite powder and Mg grids were mixed uniformly by manual grinding.…”

Ordered mesoporous silicon carbide-derived carbon for high-power supercapacitors

“…The mesoporous silicon carbide was synthesized by using Mg as reducing agent at moderate temperatures as described in our recent work [11]. After sealing a carbon/SiO 2 composite mixed with Mg powder (10% Mg molar excess over SiO 2 ) under Ar in a 316 L stainless steel tube, the magnesio-thermal reduction was performed at 800°C for 24 h at a heating rate of 1°C/min.…”

“…CDCs are prepared by chlorination of metal carbides; depending on the choice of precursor material and synthesis conditions, the resulting microstructure can be nicely controlled with a narrow pore size distribution, while retaining the original carbide shape and volume (a conformal transformation) [3]. We recently developed an original route for the synthesis of ordered mesoporous carbides by a magnesiothermal reaction on silica-carbon mesoporous composites [11]. The present work investigates the electrochemical performance of such ordered micro/mesoporous silicon carbide-CDC (SiC-CDC) materials in supercapacitor applications.…”

Defect-Rich Nickel Nanoparticles Supported on SiC Derived from Silica Fume with Enhanced Catalytic Performance for CO Methanation

“…In recent years, with increased demand on natural gas, and the aspiration to strengthen national energy security and increase energy efficiency, the production of synthetic natural gas (SNG) from coal or biomass has aroused widespread concern [9][10][11][12][13]. Being a good potential material, SiC has extensive applications in many fields, especially working in harsh environments as a support due to its excellent properties including high heat conductivity, thermal stability, mechanical strength, and chemical inertness [14][15][16][17][18][19]. SiC has been applied to various reactions, including methane reforming and combustion, Fischer-Tropsch synthesis, isomerization and dehydrogenation, among others [20,21].…”