In this work, the mechanisms of hydrogen evolution on the metal chromium in a solution of 0.1 M Na2SO4 + H2SO4, pH 1 to pH 7 were analysed. In the pH LT 3 range, hydrogen is evolved according to three different mechanisms, depending on the experimental conditions: electrochemical evolution of H2 by reaction of H+ ions according to the Volmer-Heyrovsky mechanism, on the bare chromium surface, during chemical dissolution of chromium by the Kolotyrkin mechanism, which does not depend on the electrode potential, and electrochemical hydrogen evolution by the Volmer-Heyrovsky mechanism, but on the passive chromium. At pH values greater than 3, the fourth mechanism of hydrogen evolution is observed, that is electrochemical reaction of water molecules on the surface of oxide covered chromium surface.
U ovom radu analizirani su mehanizmi izdvajanja vodonika na metalnom hromu u rastvoru 0,1 M Na2SO4 + H2SO4, pH 1 do pH 7. U oblasti pH LT 3 vodonik se izdvaja u zavisnosti od eksperimentalnih uslova po tri različita mehanizma: elektrohemijskim izdvajanjem H2 reagovanjem H+ jona po mehanizmu Folmer-Hejrovski na čistoj površini hroma, pri hemijskom rastvaranju hroma po mehanizmu Kolotirkina, a koje ne zavisi od elektrodnog potencijala i elektrohemijskim izdvajanjem vodonika po mehanizmu Folmer-Hejrovski, ali na pasivnom hromu. Pri pH vrednostima većim od 3 uočava se i četvrti mehanizam izdvajanja vodonika elektrohemijskim reagovanjem molekula vode na oksidom presvučenoj površini hroma.
TY - JOUR
AU - Jegdić, Bore
AU - Bobić, Biljana
AU - Jegdić, Aleksandar
AU - Stevanović, Maja
PY - 2015
UR - http://cer.ihtm.bg.ac.rs/handle/123456789/1770
AB - In this work, the mechanisms of hydrogen evolution on the metal chromium in a solution of 0.1 M Na2SO4 + H2SO4, pH 1 to pH 7 were analysed. In the pH LT 3 range, hydrogen is evolved according to three different mechanisms, depending on the experimental conditions: electrochemical evolution of H2 by reaction of H+ ions according to the Volmer-Heyrovsky mechanism, on the bare chromium surface, during chemical dissolution of chromium by the Kolotyrkin mechanism, which does not depend on the electrode potential, and electrochemical hydrogen evolution by the Volmer-Heyrovsky mechanism, but on the passive chromium. At pH values greater than 3, the fourth mechanism of hydrogen evolution is observed, that is electrochemical reaction of water molecules on the surface of oxide covered chromium surface.
AB - U ovom radu analizirani su mehanizmi izdvajanja vodonika na metalnom hromu u rastvoru 0,1 M Na2SO4 + H2SO4, pH 1 do pH 7. U oblasti pH LT 3 vodonik se izdvaja u zavisnosti od eksperimentalnih uslova po tri različita mehanizma: elektrohemijskim izdvajanjem H2 reagovanjem H+ jona po mehanizmu Folmer-Hejrovski na čistoj površini hroma, pri hemijskom rastvaranju hroma po mehanizmu Kolotirkina, a koje ne zavisi od elektrodnog potencijala i elektrohemijskim izdvajanjem vodonika po mehanizmu Folmer-Hejrovski, ali na pasivnom hromu. Pri pH vrednostima većim od 3 uočava se i četvrti mehanizam izdvajanja vodonika elektrohemijskim reagovanjem molekula vode na oksidom presvučenoj površini hroma.
PB - Institut za rudarstvo i metalurgiju Bor
T2 - Mining and Metallurgy Engineering Bor
T1 - Mechanisms of hydrogen evolution on chromium
T1 - Mehanizmi izdvajanja vodonika na hromu
IS - 3
SP - 145
EP - 156
DO - 10.5937/mmeb1503145j
ER -
@article{
author = "Jegdić, Bore and Bobić, Biljana and Jegdić, Aleksandar and Stevanović, Maja",
year = "2015",
url = "http://cer.ihtm.bg.ac.rs/handle/123456789/1770",
abstract = "In this work, the mechanisms of hydrogen evolution on the metal chromium in a solution of 0.1 M Na2SO4 + H2SO4, pH 1 to pH 7 were analysed. In the pH LT 3 range, hydrogen is evolved according to three different mechanisms, depending on the experimental conditions: electrochemical evolution of H2 by reaction of H+ ions according to the Volmer-Heyrovsky mechanism, on the bare chromium surface, during chemical dissolution of chromium by the Kolotyrkin mechanism, which does not depend on the electrode potential, and electrochemical hydrogen evolution by the Volmer-Heyrovsky mechanism, but on the passive chromium. At pH values greater than 3, the fourth mechanism of hydrogen evolution is observed, that is electrochemical reaction of water molecules on the surface of oxide covered chromium surface., U ovom radu analizirani su mehanizmi izdvajanja vodonika na metalnom hromu u rastvoru 0,1 M Na2SO4 + H2SO4, pH 1 do pH 7. U oblasti pH LT 3 vodonik se izdvaja u zavisnosti od eksperimentalnih uslova po tri različita mehanizma: elektrohemijskim izdvajanjem H2 reagovanjem H+ jona po mehanizmu Folmer-Hejrovski na čistoj površini hroma, pri hemijskom rastvaranju hroma po mehanizmu Kolotirkina, a koje ne zavisi od elektrodnog potencijala i elektrohemijskim izdvajanjem vodonika po mehanizmu Folmer-Hejrovski, ali na pasivnom hromu. Pri pH vrednostima većim od 3 uočava se i četvrti mehanizam izdvajanja vodonika elektrohemijskim reagovanjem molekula vode na oksidom presvučenoj površini hroma.",
publisher = "Institut za rudarstvo i metalurgiju Bor",
journal = "Mining and Metallurgy Engineering Bor",
title = "Mechanisms of hydrogen evolution on chromium, Mehanizmi izdvajanja vodonika na hromu",
number = "3",
pages = "145-156",
doi = "10.5937/mmeb1503145j"
}
Jegdić, B., Bobić, B., Jegdić, A.,& Stevanović, M. (2015). Mehanizmi izdvajanja vodonika na hromu.
Mining and Metallurgy Engineering Bor
Institut za rudarstvo i metalurgiju Bor.(3), 145-156.
https://doi.org/10.5937/mmeb1503145j
Jegdić B, Bobić B, Jegdić A, Stevanović M. Mehanizmi izdvajanja vodonika na hromu. Mining and Metallurgy Engineering Bor. 2015;(3):145-156
Jegdić Bore, Bobić Biljana, Jegdić Aleksandar, Stevanović Maja, "Mehanizmi izdvajanja vodonika na hromu" Mining and Metallurgy Engineering Bor, no. 3 (2015):145-156,
https://doi.org/10.5937/mmeb1503145j .
