Template synthesis of microporous carbon for direct methanol fuel cell application

Su, Fabing; Zeng, Jianhuang; Yu, Young Hyun; Lv, Lu; Lee, Jim Yang; Xin, Zhao

doi:10.1016/j.carbon.2005.04.018

Cited by 94 publications

(53 citation statements)

References 31 publications

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“…It is usually used for doping nitrogen functional groups. Nitrogenenriched carbons possess high specific surface area and specific capacitance [18][19][20][21]. Nitrogen in melamine-derived carbons exists mainly in pyridinic, quaternary, and oxidized forms.…”

Section: Introductionmentioning

confidence: 99%

Effect of microporosity on nitrogen-doped microporous carbons for electrode of supercapacitor

Cho¹,

Lee²,

Park³

2014

Carbon letters

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Nitrogen-doped microporous carbons were prepared using a polyvinylidene fluoride/ melamine mixture. The electrochemical performance of the nitrogen-doped microporous carbons after being subjected to different carbonization conditions was investigated. The nitrogen to carbon ratio and specific surface area decreased with an increase in the carbonization temperature. However, the maximum specific capacitance of 208 F/g was obtained at a carbonization temperature of 800°C because it produced the highest microporosity.

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Section: Introductionmentioning

confidence: 99%

Effect of microporosity on nitrogen-doped microporous carbons for electrode of supercapacitor

Cho¹,

Lee²,

Park³

2014

Carbon letters

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“…These early works indicated that template carbons possessing ordered structure with surface area greater than 1500 m 2 /g and pore volume greater than 1.0 cm 3 /g can be developed. Microporous zeolites were also considered suitable templates and extensively studied for carbon replica fabrication (Johnson et al, 1997;Ma et al, 2000;Ma et al, 2001;Meyer et al, 2001;Ma et al, 2002;Kyotani et al, 2003;Su et al, 2004;Su et al, 2005;Matsuoka et al, 2005;Garsuch et al, 2006;Hou et al, 2007;Chen et al, 2007;Armandi et al, 2007;Guan et al, 2009). However, fewer works are done on using natural mineral clays as templates for carbon production.…”

Section: Introductionmentioning

confidence: 99%

Development of Porous Template Carbons from Montmorillonite Clays and Evaluation of Their Toluene Adsorption Behaviors

Chen

Hsi

Syu

et al. 2013

Aerosol Air Qual. Res.

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Carbon replicas were developed with two montmorillonites as the template and sucrose as the carbon source. The fabrication procedures included sucrose doping, polymerization with H 2 SO 4 , carbonization at 500-900°C, and liberation of carbon replicas from the template skeleton. N 2 adsorption isotherms indicated the all of the resulting carbon replicas contained both micropores and mesopores. A higher carbonization temperature typically led to greater initial N 2 adsorption, suggesting the presence of a greater number of micropores. Since no measurable micropores were found in the parent montmorillonites, those observed in the carbon replicas may have developed via activation of inherent water due to dehydration of montmorillonite clay or sucrose during the high temperature carbonization. XRD examination confirmed the formation of both graphite-like structure and amorphous carbon. The C content, C/H molar ratio, and the extent of π-electron resonance of the carbon replicas increased as the carbonization temperature rose, indicating that a higher temperature caused more thorough carbonization in the montmorillonite templates. Toluene adsorption experiments at 1000-8000 ppm v and 30-90°C demonstrated the effectiveness of carbon replicas with regard to capturing toluene. Model simulations further suggest that pore filling of toluene inside the mesopores of template carbon may occur, because the adsorption data showed better agreement with the DR model.

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“…The application of mesoporous carbon (MC) as a catalyst support material has been studied extensively due to its favorable properties for PEM fuel cell electrodes [1][2][3][4][5][6][7][8][9][10]. The high surface area allows for a fine dispersion of Pt nanoparticles, thus resulting in a large active catalyst surface.…”

Section: Introductionmentioning

confidence: 99%

Improved stability of mesoporous carbon fuel cell catalyst support through incorporation of TiO2

Bauer

Song

Ignaszak

et al. 2010

Electrochimica Acta

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The electrochemical stability of Pt deposited on mesoporous carbon, which was either applied in its unmodified state or coated with 20 wt% TiO 2 , was investigated by cyclic voltammetry in N 2 purged 0.5 M sulfuric acid. XRD analysis revealed that TiO 2 was present in the anatase phase. The mean Pt particle diameter was ∼6 and ∼4 nm for mesoporous carbon with and without TiO 2 , respectively. Pt supported on TiO 2 modified substrates was more stable than Pt supported on conventional mesoporous carbon when subjected to 1000 cycles in the potential range from 0.05 to 1.25 V vs. RHE. This was evident from the observation that the support with TiO 2 retained ∼53% of the electrochemically active surface area relative to the state observed after 100 cycles, whereas ∼33% of the active area remained in the case without TiO 2 . The oxygen reduction mass activity was identical for both fresh samples (i.e., 18 A g −1 Pt). After 1000 cycles the mass activity decreased to 10 A g −1 Pt for the case without TiO 2 , whereas with TiO 2 the deactivation was minor; i.e., the mass activity after 1000 cycles was 17 A g .

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Template synthesis of microporous carbon for direct methanol fuel cell application

Cited by 94 publications

References 31 publications

Effect of microporosity on nitrogen-doped microporous carbons for electrode of supercapacitor

Effect of microporosity on nitrogen-doped microporous carbons for electrode of supercapacitor

Development of Porous Template Carbons from Montmorillonite Clays and Evaluation of Their Toluene Adsorption Behaviors

Improved stability of mesoporous carbon fuel cell catalyst support through incorporation of TiO2

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