New electrocatalytic reactions at a mercury electrode in the presence of homocysteine or cysteine and cobalt or nickel ions

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F09%3A00008402" target="_blank" >RIV/00216275:25310/09:00008402 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

New electrocatalytic reactions at a mercury electrode in the presence of homocysteine or cysteine and cobalt or nickel ions

Original language description

Homocysteine (Hcy) and cysteine (Cys) mercury thiolate layers were prepared by anodic polarization of a mercury electrode in amino acid containing solutions and then investigated in the cathodic regime in the presence of Ni or Co ions. Mercury thiolate undergoes a slow disintegration resulting in surface-attached mercury sulfide. Hg substitution by Ni or Co yields minute amounts of the relevant metal sulfide. Such a species catalyzes hydrogen evolution at -1.3 V vs. Ag/AgCl. Hcy experiences a faster decomposition and displays a stronger catalytic effect. Each compound catalyzes the reduction of Ni or Co, but only Cys induces typical catalytic evolution processes as the Brdička reaction or the catalytic hydrogen prewave. HCy catalyzes the hydrogen evolution in the presence of Co at -1.5 V in the same way than sulfur derivatives with no amine function do. Correlation between the physical state of the metal sulfide and its catalytic properties are discussed and possible analytical applica

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

CG - Electrochemistry

OECD FORD branch

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Project

<a href="/en/project/LC06035" target="_blank" >LC06035: Centre of Biophysical Chemistry, Bioelectrochemistry and Bioanalysis. New Tools for Genomics, Proteomics and Biomedicine.</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year

2009

Confidentiality

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

Name of the periodical

Electroanalysis

ISSN

1040-0397

e-ISSN

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Volume of the periodical

21

Issue of the periodical within the volume

2

Country of publishing house

DE - GERMANY

Number of pages

8

Pages from-to

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UT code for WoS article

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EID of the result in the Scopus database

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