Micro–mesoporous carbons from rice husk as active materials for supercapacitors

Lebedeva, Marina V.; Ayupov, Artem B.; Kuznetsov, A. N.; Yakovlev, V. А.; Parmon, Valentin N.

doi:10.1007/s40243-015-0061-x

Cited by 27 publications

(10 citation statements)

References 37 publications

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“…The mesoporous structure is highly desirable for the faster diffusion of the electrolyte and larger molecules (such as ethanol) into the internal porous surface of carbons. Consequently, this structure provides numerous accessible active sites and facilitates efficient mass transport in the catalyst layers [36,37].…”

Section: Introductionmentioning

confidence: 99%

Palladium nanoparticles supported on mesoporous biocarbon from coconut shell for ethanol electro-oxidation in alkaline media

Ferreira

Cavallari

Bergamaschi

et al. 2018

Mater Renew Sustain Energy

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Palladium nanoparticles supported on carbon Vulcan XC72 (Pd/C) and biocarbon (Pd/BC) synthesized by sodium borohydride process were used as catalysts for ethanol electro-oxidation in alkaline media. The biocarbon (BC) from coconut shell with mesoporous and high surface area (792 m 2 g −1) was obtained by carbonization at 900 °C and the hydrothermal treatment in a microwave oven. The D-band and G-band intensity ratio (I D /I G) from Raman analysis showed high disorder of the biocarbon, while X-ray photoelectron spectroscopy (XPS) suggests higher percentage of oxygen groups on the surface of biocarbon than of Vulcan XC72. From X-ray diffraction (XRD), it was observed peaks in 2θ degree related to the face centered cubic (fcc) structure of palladium and the mean crystallite sizes calculated based on the diffraction peak of Pd (220) were 5.6 nm for Pd/C and 5.3 nm for Pd/BC. Using Transmission Electron Microscope (TEM), it was observed particles well dispersed on both carbons support materials. The electrocatalytic activity of the materials was investigated by cyclic voltammetry (CV) and chronoamperometry (CA) experiments. The peak current density (on CV experiments) from ethanol electro-oxidation on Pd/BC was 50% higher than on Pd/C, while the current density measured at 15 min of CA experiments was 80% higher on Pd/BC than on Pd/C. The higher catalytic activity of Pd/BC might be related to the large surface area of the biocarbon (792 m 2 g −1) vs (239 m 2 g −1) of Vulcan carbon, the defects of the biocarbon structure and higher amount of oxygen on the surface than Carbon Vulcan XC 72.

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Section: Introductionmentioning

confidence: 99%

Palladium nanoparticles supported on mesoporous biocarbon from coconut shell for ethanol electro-oxidation in alkaline media

Ferreira

Cavallari

Bergamaschi

et al. 2018

Mater Renew Sustain Energy

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“…Besides using biomass-based materials as alternative fuels to the conventional fuels, significant efforts are going on to utilize biomass and waste materials for several energybased applications [7][8][9]. One major concern is the commercialization of clean energy devices such as Fuel cell (FC).…”

Section: Introductionmentioning

confidence: 99%

Facile synthesis of mesoporous carbon material from treated kitchen waste for energy applications

Kaur

Singh

Verma

2018

Mater Renew Sustain Energy

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Biomass is abundant, easily available, and environmentally benign source of C which can be converted to scientifically useful materials by appropriate processing. This work is our attempt to convert the treated kitchen waste and chicken manure into valuable mesoporous carbons, and to check its suitability for energy applications. The samples have been prepared using hightemperature carbonization method, and the results are investigated for physical, chemical, and preliminary electrochemical studies. The synthesized porous carbons have mesoporous size distributions (10.29 nm) along with high-doped N content (9.2 at. %). An increase in the disordered porous structure and, hence, the number of active sites have been observed under field-emission scanning electron microscopy. In the electrochemical studies, a positive shift of − 0.104 V has been observed in the oxygen reduction onset potential of the kitchen waste and chicken manure-based mesoporous carbons as compared to the control sample. Interestingly, the electrocatalytic performance is even comparable to the commercial Pt/C-based electrocatalyst. These studies indicate the suitability of the designed electrocatalyst for clean energy devices. Our approach is also an effective way to dispose-off the kitchen waste by modifying it using poultry faeces, which is a remedy to manage large-scale organic waste.

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“…The capacity of these two energy storage devices rely much on the characteristics of the electrode material. In order to obtain a remarkable energy density, porous carbon must have larger specific surface area for higher specific capacitance value, low resistivity and well adapted micro-texture so that electrolyte could access into the inner surface of the electrode [9].…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Porous Carbon From Rice Husk Applied for Electrode Materials

Huyền¹

2018

JST

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Rice husk (RH) was used as the precursor for porous carbon preparation applying as electrode materials. Porous carbon was synthesized by pyrolysis of RH under inert gas atmosphere followed by hydrothermal treatment in NaOH to remove the silica fraction and K 2 CO 3 activation to increase porosity of archived carbon. The temperature of RH decomposition was determined by the thermal gravimetric analysis (TGA) method in the nitrogen atmosphere. The performance of porous carbon and C-SiO x were examined using Brunauer-Emmett-Teller (BET) measurement and Scanning electron microscopy (SEM). The electrochemical characterizations of the synthesized materials were analyzed using cyclic voltammetry (CV) and chronopotentiometry techniques. The effect of parameters of hydrothermal and activation steps on the capacity of these porous carbons were researched. The activated porous carbon which obtained by K 2 CO 3 activation at 900 0 C in 2 hours has high specific surface area (S BET = 769.3 m 2 /g). Specific capacitance of the as-prepare electrode is 116.2 F.g -1 at scan rate of 5 mV/s. Therefore, as-prepared porous carbon from RH would be proper candidate for application as electrode material.

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Micro–mesoporous carbons from rice husk as active materials for supercapacitors

Cited by 27 publications

References 37 publications

Palladium nanoparticles supported on mesoporous biocarbon from coconut shell for ethanol electro-oxidation in alkaline media

Palladium nanoparticles supported on mesoporous biocarbon from coconut shell for ethanol electro-oxidation in alkaline media

Facile synthesis of mesoporous carbon material from treated kitchen waste for energy applications

Preparation and Characterization of Porous Carbon From Rice Husk Applied for Electrode Materials

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