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RNA as a Precursor to N-Doped Activated Carbon
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK).
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK).
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK).ORCID iD: 0000-0002-7284-2974
Number of Authors: 32018 (English)In: ACS Applied Energy Materials, ISSN 2574-0962, Vol. 1, no 8, p. 3815-3825Article in journal (Refereed) Published
Abstract [en]

Activated carbons (ACs) have applications in gas separation and power storage, and N-doped ACs in particular can be promising supercapacitors. In this context, we studied ACs produced from yeast-derived ribonucleic acid (RNA), which contains aza-aromatic bases and phosphate-linked ribose units, and is surprisingly inexpensive. The RNA was hydrothermally carbonized to produce hydrochars that were subsequently activated with CO2, KOH, or KHCO3 to give ACs. The ACs adsorbed up to similar to 7 mmol/g at 0 degrees C and 1 bar and had capacitances as high as similar to 300 F/g in a three-electrode cell and a 6 M KOH(aq) electrolyte. The material that displayed the best capacitance was tested in a two-electrode cell, which displayed a specific capacitance of 181 F/g even at a current density of 10 A/g. The ACs with the highest uptake of CO2 and the highest capacitance were those activated with KOH and KHCO3; however, CO2 activation is arguably less expensive and more suitable for industrialization.

Place, publisher, year, edition, pages
2018. Vol. 1, no 8, p. 3815-3825
Keywords [en]
N-doped activated carbons, CO2 sorption, supercapacitors, capacitance, hydrothermal, RNA
National Category
Chemical Sciences
Identifiers
URN: urn:nbn:se:su:diva-166870DOI: 10.1021/acsaem.8b00589ISI: 000458706400036OAI: oai:DiVA.org:su-166870DiVA, id: diva2:1294092
Available from: 2019-03-06 Created: 2019-03-06 Last updated: 2019-03-06Bibliographically approved

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Church, Tamara L.Hedin, Niklas
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