An investigation of fractal characteristics of mesoporous carbon electrodes with various pore structures

Pyun, Su‐Il; Rhee, Chang Kyu

doi:10.1016/j.electacta.2004.04.012

Cited by 142 publications

(72 citation statements)

References 34 publications

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“…The obtained D s values for these particles imply a wiggly and space-filling surface [14,23]. The minimum limits of fractal scales for samples 1 and 2 are very less than 0.2 nm, the radius of nitrogen.…”

Section: Pore Surface Fractal Dimension Calculation Of Particles Aroumentioning

confidence: 76%

“…Nitrogen adsorption-desorption isotherms of natural particles. the pores comprising the dried flocs are mostly mesoporous [23]. The adsorption and porosity properties of the samples, as calculated from the adsorption-desorption isotherms, are listed in Table 1.The specific surface areas were calculated using the BET method and were found to range from 9.5669 to 34.5605 m 2 g −1 , with the corresponding total porosity varying from 0.01784 to 0.06656 cm 3 g −1 .…”

Section: Nitrogen Adsorption-desorption Isothermsmentioning

confidence: 99%

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Study on the pore surface fractal dimension and surface acid–base properties of natural particles around Guanting reservoir

Wang

Dou

et al. 2007

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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Section: Pore Surface Fractal Dimension Calculation Of Particles Aroumentioning

confidence: 76%

Section: Nitrogen Adsorption-desorption Isothermsmentioning

confidence: 99%

Study on the pore surface fractal dimension and surface acid–base properties of natural particles around Guanting reservoir

Wang

Dou

et al. 2007

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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“…This proves that although the principles of NMR and N 2 adsorption measurements are not the same, and the fractal dimension calculation methods are also different, their fractal dimensions have a strong consistency. Pyun thought that the fractal dimensions of porous media include pore structure fractal dimension and pore surface fractal dimension (Pyun et al, 2004). Previous studies all believed that the fractal dimension D 1 represents the fractal dimension of the pore surface (Fu et al, 2017;Yang et al, 2014;Yao et al, 2008).…”

Section: Comparison Of Fractal Dimensions From N 2 Adsorption and Nmrmentioning

confidence: 99%

Full‐Sized Pore Structure and Fractal Characteristics of Marine‐Continental Transitional Shale: A Case Study in Qinshui Basin, North China

Yin

Guo

2019

Acta Geologica Sinica (Eng)

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Based on 10 shale samples collected from 4 wells in Qinshui Basin, we investigate the full-sized pore structure and fractal characteristics of Marine-Continental transitional shale by performing organic geochemistry, mineralogical composition, Nitrogen gas adsorption (N 2 adsorption) and Nuclear Magnetic Resonance (NMR) measurements and fractal analysis. Results show that the TOC content of the shale samples is relatively high, with an average value of 2.44wt%, and the thermal evolution is during the mature-over mature stage. The NMR T 2 spectrum can be used to characterize the fullsized pore structure characteristics of shale. By combining N 2 adsorption pore structure parameters and NMR T 2 spectrums, the surface relaxivity of samples are calculated to be between 1.7877 um/s and 5.2272 um/s. On this basis, the T 2 spectrums are converted to full-sized pore volume and surface area distribution curves. The statistics show that the pore volume is mainly provided by mesopore, followed by micropore, and the average percentages are 65.04% and 30.83% respectively; the surface area is mainly provided by micropore, followed by mesopore, and the average percentages are 60.8004% and 39.137% respectively; macropore contributes little to pore volume and surface area. The pore structure characteristics of shale have no relationship with TOC, but strong relationships with clay minerals content. NMR fractal dimensions D micro and D meso have strong positive relationships with the N 2 adsorption fractal dimensions D 1 and D 2 respectively, indicating that D micro can be used to characterize the fractal characteristics of pore surface, and D meso can be used to characterize the fractal characteristics of pore structure. The shale surface relaxivity is controlled by multiple factors. The increasing of clay mineral content, pore surface area, pore surface fractal dimension and the decreasing of average pore size, will all lead to the decreasing of shale surface relaxivity.

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“…Roughness as the general shape and surface irregularity is an important characteristic that affects the mass and transport behavior of the carbon blacks [17]. Penetration of gases and ions into the pores is closely related to pore size and pore shape distributions [18]. Compactness or roundness of pores affects wettability, which in turn influences transport properties of reactants within the support.…”

Section: Introductionmentioning

confidence: 99%

Structure-to-property relationships in fuel cell catalyst supports: Correlation of surface chemistry and morphology with oxidation resistance of carbon blacks

Artyushkova

Pylypenko

Dowlapalli

et al. 2012

Journal of Power Sources

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An investigation of fractal characteristics of mesoporous carbon electrodes with various pore structures

Cited by 142 publications

References 34 publications

Study on the pore surface fractal dimension and surface acid–base properties of natural particles around Guanting reservoir

Study on the pore surface fractal dimension and surface acid–base properties of natural particles around Guanting reservoir

Full‐Sized Pore Structure and Fractal Characteristics of Marine‐Continental Transitional Shale: A Case Study in Qinshui Basin, North China

Structure-to-property relationships in fuel cell catalyst supports: Correlation of surface chemistry and morphology with oxidation resistance of carbon blacks

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