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Statements

Subject Item
n2:RIV%2F00216275%3A25310%2F09%3A00008402%21RIV10-MSM-25310___
rdf:type
n15:Vysledek skos:Concept
dcterms: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 applications suggested. 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 applications suggested.
dcterms:title
New electrocatalytic reactions at a mercury electrode in the presence of homocysteine or cysteine and cobalt or nickel ions New electrocatalytic reactions at a mercury electrode in the presence of homocysteine or cysteine and cobalt or nickel ions
skos:prefLabel
New electrocatalytic reactions at a mercury electrode in the presence of homocysteine or cysteine and cobalt or nickel ions New electrocatalytic reactions at a mercury electrode in the presence of homocysteine or cysteine and cobalt or nickel ions
skos:notation
RIV/00216275:25310/09:00008402!RIV10-MSM-25310___
n3:aktivita
n4:P n4:Z
n3:aktivity
P(LC06035), Z(MSM0021627502)
n3:cisloPeriodika
2
n3:dodaniDat
n5:2010
n3:domaciTvurceVysledku
n7:6143083 n7:2613212 n7:9805524
n3:druhVysledku
n6:J
n3:duvernostUdaju
n18:S
n3:entitaPredkladatele
n9:predkladatel
n3:idSjednocenehoVysledku
329354
n3:idVysledku
RIV/00216275:25310/09:00008402
n3:jazykVysledku
n13:eng
n3:klicovaSlova
Electrocatalysis; mercury electrode; homocystein; cystein; nickel; cobalt
n3:klicoveSlovo
n11:mercury%20electrode n11:Electrocatalysis n11:homocystein n11:cystein n11:nickel n11:cobalt
n3:kodStatuVydavatele
DE - Spolková republika Německo
n3:kontrolniKodProRIV
[C7355B9513E7]
n3:nazevZdroje
Electroanalysis
n3:obor
n16:CG
n3:pocetDomacichTvurcuVysledku
3
n3:pocetTvurcuVysledku
5
n3:projekt
n17:LC06035
n3:rokUplatneniVysledku
n5:2009
n3:svazekPeriodika
21
n3:tvurceVysledku
Banica, Anna Vytřas, Karel Galík, Michal Banica, Florinel-Gabriel Švancara, Ivan
n3:zamer
n19:MSM0021627502
s:issn
1040-0397
s:numberOfPages
8
n14:organizacniJednotka
25310