Naslov
Tensammetry of Proteins and Polysaccharides on Mercury Electrode under Conditions of Catalytic Activity

Autori
Strmečki Kos, Slađana ; Paleček, Emil

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
6th Regional Symposium on Electrochemistry of South-East Europe, 6th RSE-SEE Conference : Book of abstracts / Hohol, Róbert - Budimpešta : Diamond Scientific Publishing, 2017, 137-137

ISBN
978-615-5270-33-8

Skup
6th Regional Symposium on Electrochemistry of South-East Europe

Mjesto i datum
Balatonkenese, Mađarska, 11.06.2017. - 15.06.2017

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Catalytic hydrogen evolution reaction ; tensammetry ; biomacromolecules ; mercury electrode

Sažetak
Proteins and polysaccharides adsorb ubiquitously on the mercury electrodes. Depending on the structure, they produce catalytic hydrogen evolution reaction (CHER) peak in a buffer solution using voltammetric and chronopotentiometric stripping method. Here we show that the voltammetric appearance of CHER peak at very negative potentials, ~ -1.8 V in the protein and polysaccharide solution, is accompanied by a capacitive current minimum in alternate current (AC) out-of-phase voltammetry. The observed “tensammetric minimum” highly depended on buffer concentration, ionic strength, pH, catalyst concentration and time of accumulation. One of the possible reason for its appearance could be strong adsorption of the positively charged species such as hydrogen ions at the negatively charged mercury electrode. Moreover, tensammetric minimum proved to be sensitive toward catalytically active protein or polysaccharide when present in the mixture with catalytically inactive molecule.

Izvorni jezik
Engleski

Znanstvena područja
Kemija, Interdisciplinarne prirodne znanosti

POVEZANOST RADA