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Chitosan catalyzes hydrogen evolution at mercury electrodes
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SYSNO ASEP 0431759 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Chitosan catalyzes hydrogen evolution at mercury electrodes Author(s) Paleček, Emil (BFU-R) RID, ORCID
Římánková, Ludmila (BFU-R)Number of authors 2 Source Title Electrochemistry Communications. - : Elsevier - ISSN 1388-2481
Roč. 44, JUL2014 (2014), s. 59-62Number of pages 4 s. Publication form Print - P Language eng - English Country NL - Netherlands Keywords Chitosan ; Glucosamine-containing polymers ; Catalytic hydrogen evolution Subject RIV BO - Biophysics R&D Projects GAP301/11/2055 GA ČR - Czech Science Foundation (CSF) Institutional support BFU-R - RVO:68081707 UT WOS 000337997400016 DOI 10.1016/j.elecom.2014.04.015 Annotation In recent decades chitosan has attracted great attention as biodegradable biomaterial with interesting properties, making chitosan useful in biomedicine and various fields of practical life. Chitosan was generally considered as an electrochemically inactive polysaccharide. Here we show that chitosan (containing glucosamine residues) produced voltammetric and chronopotentiometric reduction peaks at mercury and solid amalgam electrodes in a wide pH range. These peaks strongly increased with the buffer concentration and with decreasing pH and were assigned to the catalytic hydrogen evolution reaction. Under the same conditions chitin oligomers (containing N-acetylated glucosamines) displayed no significant electroactivity. Polyanionic polymers, such as DNA and hyaluronic acid, formed multilayers with the adsorbed chitosan. (C) 2014 Elsevier B.V. All rights reserved. Workplace Institute of Biophysics Contact Jana Poláková, polakova@ibp.cz, Tel.: 541 517 244 Year of Publishing 2015
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