Nanoporous polymer-derived activated carbon for hydrogen adsorption and electrochemical energy storage

Kostoglou, Nikolaos; Koczwara, Christian; Stock, Sebastian; Tampaxis, Christos; Charalambopoulou, Georgia; Steriotis, Theodore; Paris, Oskar; Rebholz, Claus; Mitterer, Christian

doi:10.1016/j.cej.2021.131730

Cited by 55 publications

(26 citation statements)

References 54 publications

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“…The presence of a further increase in Ar uptake at P/P 0 > 0.94 is due to condensation in macropores (>50 nm) or adsorption onto external surfaces. The steep uptake at low relative pressures (P/P 0 < 10 −1 ) suggests micropores to be the dominating class of pores [ 47 ].…”

Section: Resultsmentioning

confidence: 99%

Nanoporous Carbon Electrodes Derived from Coffee Side Streams for Supercapacitors in Aqueous Electrolytes

et al. 2022

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Coffee, as one of the most traded resources, generates a vast amount of biogenic by-products. Coffee silver skins (CSS), a side stream from the roasting process, account for about 4 wt.%. Despite the abundancy of CSS, possible routes to generate added value for broad applications are limited. Herein, we present an approach to use CSS as a precursor material for supercapacitor electrodes. KOH activated carbon (AC) was produced from CSS. The resulting AC—CSS was characterized by X-ray diffraction, gas sorption analysis, scanning electron microscopy, and Raman spectroscopy. The highly porous AC—CSS exposes a specific surface area of more than 2500 m2 g−1. Electrodes formed with AC—CSS were electrochemically characterized by performing cyclic voltammetry and galvanostatic cycling. The electrodes were further assembled into a supercapacitor device and operated using 1 M sulfuric acid as electrolyte. In addition, various quinones were added to the electrolyte and their impact on the capacitance of AC—CSS electrodes was analyzed. In this work, we were able to show that CSS are a valuable source for supercapacitor applications and that coffee-waste-derived quinones can act as capacitance enhancers. Thus, the findings of this research show a valuable path towards sustainable and green energy storage solutions.

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Section: Resultsmentioning

confidence: 99%

Nanoporous Carbon Electrodes Derived from Coffee Side Streams for Supercapacitors in Aqueous Electrolytes

et al. 2022

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“…When putting PDAC into an aqueous electrolyte to form a thin electrode, it exhibits a 99% columbic efficiency and a 100 % capacitance retention rate after 2,500 charge/discharge circles under a 0.5 mV‧s scanning speed, which means with a much smaller diameter, PDAC performed better whether in refining H2 uptake or improving electrochemical energy storage property. [12] And it again shows us the advantages of nanoparticles, and more research is needed to be put on the table about such cutting-edge material.…”

Section: Nanoparticle Techniquementioning

confidence: 99%

Discussion About Carbon-Based Solid-State Hydrogen Storage Materials

Fan

Wang

Zheng

2022

IOP Conf. Ser.: Earth Environ. Sci.

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Activated carbon, as one type of hydrogen storage material have long been attracted by a measure of researchers. Some of the activated carbon’s properties may fall short compared with other materials; their characteristics like high surface area, easy-to-prepare, pretty small diameters, however, keep their status as one of the best choices for hydrogen storage. Carbon nanotube is considered as a promising candidate for solid-state hydrogen storage, and there is quite much research have been conducted to synthesize low-cost carbon nanotube with low absorption temperatures, high gravimetric and volumetric hydrogen storage densities, flexibility, good resistance to oxidation, high hardness, good reversibility and cyclic ability and moderate thermodynamic stability. Carbon fiber has shown its unique advantages among many other solid-state hydrogen storage materials. Carbon fiber might be the best for hydrogen storage since its low gas-solid interaction, tunable texture, surface area, high pore volume and excellent chemical and thermal stability. Additionally, the carbon fiber could also control its pore size for better absorption of a great number of hydrogen molecules. Based on several indexes, this literature introduce above three types of solid-state hydrogen materials, which hopefully are able to be favorable to further researches on relevant fields.

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“… 15 , 16 In addition, AC is used for the removal of Hg because it contains well-oriented nanoporous structural carbon atoms. 17 Furthermore, low-cost activated carbon derived from biomaterials has an added value. The development of activated carbon from bioresources such as palm trees takes different forms including physical activation, pyrolysis, chemical activation, or the use of chemical reagents.…”

Section: Introductionmentioning

confidence: 99%

“…Activated carbon (AC) has been considered as a very promising adsorbent to remove Hg from water systems because it is available, has a high adsorbability, and is simple to be used with low secondary waste. , In addition, AC is used for the removal of Hg because it contains well-oriented nanoporous structural carbon atoms . Furthermore, low-cost activated carbon derived from biomaterials has an added value.…”

Section: Introductionmentioning

confidence: 99%

Mercury Removal from Water Using a Novel Composite of Polyacrylate-Modified Carbon

Al-Yaari

Saleh

2022

ACS Omega

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The contamination of groundwater by mercury (Hg) is a serious global threat, and its removal is of great importance. Activated carbon (AC) is considered a very promising adsorbent to remove Hg from water systems. However, specific functional groups can be added to AC to enhance its adsorption efficiency. In this work, AC was synthesized from palm shells and grafted with a copolymer of acrylamide and methacrylic acid to produce a polyacrylate-modified carbon (PAMC) composite. The synthesized adsorbent (PAMC) was characterized by Fourier-transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), electron dispersive X-ray (EDX) spectroscopy, and Brunauer–Emmett–Teller (BET) analysis. PAMC was then evaluated for Hg removal from aqueous solutions, and the adsorption efficiency was optimized under several parameters (pH, contact time, and PAMC dosage). Kinetic, isotherm, and thermodynamic investigations were performed to gain a further understanding of the adsorption properties. The adsorption data were best fitted by pseudo-second-order and Redlich–Peterson models. Also, the thermodynamic investigation confirmed the spontaneity and the endothermic nature of the Hg adsorption process over PAMC. The maximum adsorption capacity ( q m ) of PAMC was found to be 76.3 mg/g ,which is relatively higher than some activated carbon-based adsorbents. Therefore, PAMC offers a potential promise for wastewater treatment due to its fast and high uptake removal capacity in addition to the cheap and environmentally friendly activated carbon source.

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Nanoporous polymer-derived activated carbon for hydrogen adsorption and electrochemical energy storage

Cited by 55 publications

References 54 publications

Nanoporous Carbon Electrodes Derived from Coffee Side Streams for Supercapacitors in Aqueous Electrolytes

Nanoporous Carbon Electrodes Derived from Coffee Side Streams for Supercapacitors in Aqueous Electrolytes

Discussion About Carbon-Based Solid-State Hydrogen Storage Materials

Mercury Removal from Water Using a Novel Composite of Polyacrylate-Modified Carbon

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