Adsorption/desorption of biomacromolecules involved in catalytic hydrogen evolution

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081707%3A_____%2F18%3A00488373" target="_blank" >RIV/68081707:_____/18:00488373 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1016/j.bioelechem.2017.11.013" target="_blank" >http://dx.doi.org/10.1016/j.bioelechem.2017.11.013</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.bioelechem.2017.11.013" target="_blank" >10.1016/j.bioelechem.2017.11.013</a>

Result language

angličtina

Original language name

Adsorption/desorption of biomacromolecules involved in catalytic hydrogen evolution

Original language description

Previously, it has been shown thatproteins and some polysaccharides (PSs) catalyse hydrogen evolution, producing electrochemical signals on mercury electrodes. The catalytic hydrogen evolution reaction (CHER) of the above-mentioned biomacromolecules was studied by voltammetric and chronopotentiometric stripping (CPS) methods. To obtain more information about electrode processes involving CHER, here we used protein such as BSA, and chitosan as a PS, in addition, we investigated dextran as a control PS not involved in CHER. We studied biomacromolecules by phase-sensitive alternating current (AC) voltammetry. Using phase-in AC voltammetry, for CHER-involved biomacromolecules we observed a CHER peak at highly negative potentials, similar to that observed with other voltammetric and CPS methods. On the other hand, by means of the adsorption/desorption processes studied in phase-out AC voltammetry, we uncovered a sharp and narrow decrease of capacitive current in the potential range of the CHER peak, denominated as the tensammetric minimum. This minimum was closely related to the CHER peak, as demonstrated by similar dependences on specific conditions affecting the CHER peak such as buffer capacity and pH. A tensammetric minimum was not observed for dextran. Our results suggest specific organization of biopolymer layers at negative potentials observed only in biomacromolecules involved in CHER. (C) 2017 Elsevier B.V. All rights reserved.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10405 - Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)

Project

<a href="/en/project/GA15-15479S" target="_blank" >GA15-15479S: New tools for research and diagnostics of diseases. Microfluidic reactors and electrochemistry for analysis of proteins and their glycosylation.</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2018

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Bioelectrochemistry

ISSN

1567-5394

e-ISSN

—

Volume of the periodical

120

Issue of the periodical within the volume

APR2018

Country of publishing house

CH - SWITZERLAND

Number of pages

7

Pages from-to

87-93

UT code for WoS article

000425575800011

EID of the result in the Scopus database

—