Characterization of the pore structure of nanoporous activated carbons produced from wood waste

Dobele, Gaļina; Vervikishko, Darya; Voļperts, Aleksandrs; Богданович, Н. И.; Shkolnikov, E

doi:10.1515/hf-2012-0188

Cited by 18 publications

(3 citation statements)

References 8 publications

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“…One of the most important properties of carbon materials is the pore size distribution, which determines the surface area and mass transfer of chemicals and ionic groups. The thermochemical activation of the lignocellulosic biomass is widely studied for the highly microporous activated carbons [31][32][33][34][35]; however, to improve electrochemical performance, mesopores are also required [36]. The porous structures of the obtained carbon materials pre-and post-N-doping were studied using nitrogen sorption at 77 K: the isotherms are shown in Figure 1a, and the pore size distributions calculated according to the quenched solid density functional theory (QSDFT) are shown in Figure 1b.…”

Section: Characterization Of the Materialsmentioning

confidence: 99%

Wood and Black Liquor-Based N-Doped Activated Carbon for Energy Application

et al. 2021

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Fuel cells, batteries and supercapacitors are critical to meet the rising global demand for clean, sustainable energy. Biomass-derived activated carbon can be obtained with tailored properties to fulfil the extensive need for low-cost, high-performance, catalyst and electrode materials. To investigate the possibility of nanoporous nitrogen-doped carbon materials as catalysts in fuel cells and electrodes in lithium-ion batteries, biomass precursors were thermochemically activated with NaOH at 800 °C, nitrogen was introduced using dicyandiamide and doping was performed at 800 °C. The chemical composition, porous structure, texture and electrochemical properties of the obtained materials change depending on the biomass precursor used. It has been found that the most promising precursor of the obtained materials is wood char, both as an oxygen reduction catalyst in fuel cells, which shows better properties than the commercial 20% Pt/C catalyst, and as an anode material in Li-ion batteries. However, catalysts based on black liquor and hybrid material have comparable properties with commercial 20% Pt/C catalyst and can be considered as a cheaper alternative.

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Section: Characterization Of the Materialsmentioning

confidence: 99%

Wood and Black Liquor-Based N-Doped Activated Carbon for Energy Application

et al. 2021

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“…Pyrolysis is a promising thermochemical technology for converting biomass into energy and chemical products. The demand for the commercial use of biomass-based carbon materials is growing rapidly in the field of modern technologies in medicine, environmental protection and energy as catalysts, battery and capacitor electrodes [1][2][3]. The fundamental reasons for this are both the renewability of precursors and the chemical composition and structure of carbons, which allow for an infinite variety of three-dimensional modifications that are capable of incorporating heteroatoms to form functional groups that determine the self-organization, chemical stability and reactivity of the synthesized materials.…”

Section: Introductionmentioning

confidence: 99%

Thermochemical Activation of Wood with NaOH, KOH and H3PO4 for the Synthesis of Nitrogen-Doped Nanoporous Carbon for Oxygen Reduction Reaction

Dobele,

Volperts,

Plavniece

et al. 2024

Molecules

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Carbonization of biomass residues followed by activation has great potential to become a safe process for the production of various carbon materials for various applications. Demand for commercial use of biomass-based carbon materials is growing rapidly in advanced technologies, including in the energy sector, as catalysts, batteries and capacitor electrodes. In this study, carbon materials were synthesized from hardwood using two carbonization methods, followed by activation with H3PO4, KOH and NaOH and doping with nitrogen. Their chemical composition, porous structure, thermal stability and structural order of samples were studied. It was shown that, despite the differences, the synthesized carbon materials are active catalysts for oxygen reduction reactions. Among the investigated carbon materials, NaOH-activated samples exhibited the lowest Tafel slope values, of −90.6 and −88.0 mV dec–1, which are very close to the values of commercial Pt/C at −86.6 mV dec–1.

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“…The most common carbon materials used for N-doping include carbon nanotubes, , carbide-derived carbon, carbon blacks, , MOFs, and graphene. − Presently, graphene is one of the most popular candidates because of its high conductivity and attractive thermal and mechanical properties . Among the previously mentioned support materials, biomass-derived carbon has lately been achieving enormous interest. − Lignin-rich wood mass has been reported to be an extraordinary precursor for high surface area carbon synthesis . Lignin plays a crucial role in this high surface area nanocarbon formation as it constitutes up to 35 wt % of the dry mass of wood .…”

Section: Introductionmentioning

confidence: 99%

Highly Active Wood-Derived Nitrogen-Doped Carbon Catalyst for the Oxygen Reduction Reaction

Kaare

Voļperts

et al. 2020

ACS Omega

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In this recent decade, great interest has risen to develop metal-free and cheap, biomass-derived electrocatalysts for oxygen reduction reaction (ORR). Herein, we report a facile strategy to synthesize an electrochemically active nanocarbon material from the renewable and biological resource, wood biomass. The ORR activity of the catalyst material was investigated in 0.1 M KOH solution by employing the rotating disc electrode method. Scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, and Raman spectroscopy were employed to obtain more information about the catalyst material’s morphology and composition. The material exhibits outstanding electrocatalytic activity with low onset potential and high current density, similar to that of a commercial Pt/C catalyst in an alkaline medium. The results clearly ascertain that wooden biomass can be easily transformed into novel carbon nanostructures with superior ORR activity and possibility to be used in fuel cells and metal–air batteries.

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Characterization of the pore structure of nanoporous activated carbons produced from wood waste

Cited by 18 publications

References 8 publications

Wood and Black Liquor-Based N-Doped Activated Carbon for Energy Application

Wood and Black Liquor-Based N-Doped Activated Carbon for Energy Application

Thermochemical Activation of Wood with NaOH, KOH and H3PO4 for the Synthesis of Nitrogen-Doped Nanoporous Carbon for Oxygen Reduction Reaction

Highly Active Wood-Derived Nitrogen-Doped Carbon Catalyst for the Oxygen Reduction Reaction

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