Improvement of electric double-layer capacitance of ordered mesoporous carbon CMK-3 by partial graphitization using metal oxide catalysts

The enhanced electrocatalytic activity of okara-derived N-doped mesoporous carbon for oxygen reduction reaction

“…No peaks relating to Fe species appeared in the curves of NeC-2(b) and NeC-3(c), suggesting acid leaching removed most of the Fe species. The negative shift of the graphitic carbon (002) plane peak for NeC-2 and NeC-3 compared to NeC-1 indicates an increasing degree of graphitization, which was catalyzed by the addition of iron salt [20]. Fig.…”

Synthesis of Graphitic Mesoporous Carbon from Metal Impregnated Silica Template for Proton Exchange Membrane Fuel Cell Application

“…The amount of Pt precursor salt used is based on the Pt metal content of 20.0 wt.% in the final electrocatalyst. To reduce PtCl 6 2ions to platinum, impregnated OMC, M-mOMC and Vulcan XC-72 were treated under hydrogen flow at 350°C for 2 h. Nafion membrane was employed in the membrane electrode assembly. The catalyst ink for the MEA was prepared by adding Nafion ionomer to reduced catalyst dissolved in isopropanol.…”

“…Ordered mesoporous carbon (OMC), which has high specific surface area (>1,000 m 2 g -1 ) and hexagonal mesopores, offers promising application in PEMFC as catalyst support [3]. However, OMC's amorphous structure leads to limited electrical conductivity, which deteriorates fuel cell performance [6,7]. Recent study by Nettelroth et al suggested that graphitization is required for high electrocatalytic activity of mesoporous carbon [8].…”

Catalytic graphitization of ordered mesoporous carbon CMK‐3 with iron oxide catalysts: Evaluation of different synthesis pathways

“…Therefore, graphitization is usually carried out catalytically where at different transition metal oxides like iron oxides are applied as catalysts . Yuan et al used mesoporous iron oxide which acted simultaneously as template and catalyst by impregnating the oxide with a carbon precursor and heat‐treated the composite at 900 °C , Inagaki et al applied hard SBA‐15 templates which were impregnated with metal oxide before loading the carbon precursor . Other pathways were reported by Liu et al and Xie et al who impregnated the catalyst species directly in the porous carbon .…”

“…In the pre‐synthetic approach following Inagaki et al , SBA‐15 is first impregnated with the catalyst precursor and after formation of the catalyst species further impregnated with the carbon precursor. In the simultaneous approach which has to our knowledge not been reported so far, the catalyst precursor and the carbon precursor are impregnated in the porous silica at the same time.…”