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undergraduate thesis
Razvijanje vodika na Ni-Co leguri
završni rad
2022. urn:nbn:hr:167:820259
Barišić, Iva
University of Split
Faculty of Chemistry and Technology
Division of Engineering and Chemistry

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Barišić, I. (2022). Razvijanje vodika na Ni-Co leguri : završni rad (Undergraduate thesis). Split: University of Split, Faculty of Chemistry and Technology. Retrieved from https://urn.nsk.hr/urn:nbn:hr:167:820259

Barišić, Iva. "Razvijanje vodika na Ni-Co leguri : završni rad." Undergraduate thesis, University of Split, Faculty of Chemistry and Technology, 2022. https://urn.nsk.hr/urn:nbn:hr:167:820259

Barišić, Iva. "Razvijanje vodika na Ni-Co leguri : završni rad." Undergraduate thesis, University of Split, Faculty of Chemistry and Technology, 2022. https://urn.nsk.hr/urn:nbn:hr:167:820259

Barišić, I. (2022). 'Razvijanje vodika na Ni-Co leguri : završni rad', Undergraduate thesis, University of Split, Faculty of Chemistry and Technology, accessed 12 December 2024, https://urn.nsk.hr/urn:nbn:hr:167:820259

Barišić I. Razvijanje vodika na Ni-Co leguri : završni rad [Undergraduate thesis]. Split: University of Split, Faculty of Chemistry and Technology; 2022 [cited 2024 December 12] Available at: https://urn.nsk.hr/urn:nbn:hr:167:820259

I. Barišić, "Razvijanje vodika na Ni-Co leguri : završni rad", Undergraduate thesis, University of Split, Faculty of Chemistry and Technology, Split, 2022. Available at: https://urn.nsk.hr/urn:nbn:hr:167:820259

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Metadata
TitleRazvijanje vodika na Ni-Co leguri : završni rad
Title (english)Hydrogen evolution Ni-Co alloy : bachelor thesis
AuthorIva Barišić
MentorZoran Grubač (mentor)
Committee memberSenka Gudić (predsjednik povjerenstva)
Committee memberLadislav Vrsalović (član povjerenstva)
Committee memberZoran Grubač (član povjerenstva)
GranterUniversity of Split
Faculty of Chemistry and Technology
(Division of Engineering and Chemistry)
Split
Defense date and country2022-09-20, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Chemical Engineering
Abstract
Ispitivano je elektrokatalitičko djelovanje legure Ni 57 Co 43 u 0.5 mol dm -3 vodenoj otopini NaOH na reakciju razvijanja vodika pomoću metoda cikličke voltametrije, linearne polarizacije i elektrokemijske impedancijske spektroskopije. Metodom cikličke voltametrije istraženo je opće elektrokemijsko ponašanje legure Ni 57 Co 43 od područja razvijanja vodika do područja razvijanja kisika. Detektirana su područja potencijala pri kojima dolazi do nastajanja oksida/hidroksida te njihove redukcije. Glavni kinetički parametri: nagib katodnog Tafelovog pravca i gustoća struje izmjene određeni su metodama kvazipotenciostatske linearne polarizacije i elektrokemijske impedancijske spektroskopije. Impedancijski spektri modelirani su prema modificiranom Randlesovom električnom strujnom krugu i određene su vrijednosti elemenata ekvivalentnog električnog kruga. Pomoću Brugove jednadžbe izračunat je kapacitet elektrokemijskog dvosloja iz kojeg je određena hrapavost elektrode. Rezultati dobiveni metodom linearne polarizacije dobro se slažu s rezultatima elektrokemijske impedancijske spektroskopije. Reakcija razvijanja vodika odvija se po mehanizmu Volmer-Heyrovski, a brzinu ukupne reakcije određuje reakcija Heyrovski.
Abstract (english)
The electrocatalytic activity of the Ni 57 Co 43 alloy in 0.5 mol dm -3 NaOH aqueous solutions on the hydrogen evolution reaction was investigated using cyclic voltammetry, linear polarization and electrochemical impedance spectroscopy. The general behaviour of the Ni 57 Co 43 alloy from the area of hydrogen evolution to the area of oxygen evolution was investigated by cyclic voltammetry method. The potential range in which oxides/hydroxides are formed are detected. The main kinetic parameters: the slope of the Tafel line and the current exchange density were determined by linear polarization and electrochemical impedance spectroscopy. Impedance data were modelled according to the modified Randles electric circuit and the values of the elements of the equivalent electric circuit were determined. Using Brug's equation, the capacity of the electrochemical double layer was calculated and the roughness of the electrode was obtained. The results obtained by the linear polarization method are similar to the results of electrochemical impedance spectroscopy. The hydrogen evolution reaction follows the Volmer-Heyrovsky mechanism, and the overall rate determines the Heyrovsky reaction.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:167:820259
Study programmeTitle: Chemical Technology; specializations in: Chemical Engineering, Environmental Protection
Course: Chemical Engineering
Study programme type: university
Study level: undergraduate
Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka kemijskog inženjerstva (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka kemijskog inženjerstva)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Embargo expiration date: 2024-11-03
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Created on2022-11-03 10:59:24