Elektrokemijska svojstva cirkonijeve elektrode za reakciju razvijanja vodika

undergraduate thesis

• Title (english): Electrochemical properties of zirconium electrode for hydrogen evolution reaction
• Author: Magdalena Vrđuka
• Mentor: Ante Jukić (mentor)
• Committee member: Ante Jukić (predsjednik povjerenstva)
• Committee member: Jozefina Katić (član povjerenstva)
• Committee member: Marijana Kraljić Roković (član povjerenstva)
• Granter: University of Zagreb; Faculty of Chemical Engineering and Technology; Zagreb
• Defense date and country: 2024-09-23, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Chemistry

Abstract

U radu je istraženo elektrokatalitičko ponašanje čistog cirkonija za reakciju razvijanja vodika elektrolizom vode. Pošto se na globalnoj razini želi smanjiti potrošnja fosilnih goriva i njihovo štetni utjecaj na okoliš, fokus je usmjeren na obnovljive izvore energije. Pri tomu se zeleni vodik dobiven elektrolizom vode uz obnovljivu električnu energiju ističe kao održivi i obnovljivi energent. Elektrokemijska svojstva cirkonija istražena su in-situ metodama cikličke voltametrije (CV), linearne polarizacije i elektrokemijske impedancijske spektroskopije (EIS). Eksperimenti su izvođeni u troelektrodnom sustavu pri sobnoj temperaturi u 1 mol dm^-3 otopini NaOH, pH = 14. Dobiveni rezultati su pokazali da čisti cirkonij nije dobar katalizator za reakciju razvijanja vodika zbog vrlo stabilnog površinskog oksidnog sloja koji uzrokuje dodatni pad potencijala i povećan otpor izmjeni naboja. Međutim, cirkonij može omogućiti kreiranje djelotvornog katalizatora na osnovi slitina prijelaznih metala.

Abstract (english)

In this paper, the electrocatalytic behavior of pure zirconium for the reaction of hydrogen evolution by water electrolysis was investigated. Since on a global level we want to reduce the consumption of fossil fuels and their harmful impact on the environment, the focus is on renewable energy sources. At the same time, green hydrogen obtained by electrolysis of water with renewable electricity stands out as a sustainable and renewable energy source. The electrochemical properties of zirconia were investigated by in-situ methodes cyclic voltammetry (CV), linear polarization and electrochemical impedance spectroscopy (EIS). The experiments were performed in a three-electrode system at room temperature in a
1 mol dm^-3 NaOH solution of pH = 14. The obtained results showed that pure zirconium is not a good catalyst for the hydrogen evolution reaction due to a very stable surface oxide layer that causes an additional drop in potential and increased resistance to charge exchange. However, zirconium can enable the creation of an effective catalyst based on transition metal alloys.

• Keywords: zeleni vodik; elektroliza vode; katalizator; elektrokemijska impedancijska spektroskopija (EIS)
• Keywords (english): green hydrogen; electrolysis of water; catalyst; electrochemical impedance spectroscopy (EIS)
• Language: croatian
• URN:NBN: urn:nbn:hr:149:138273
• Study programme: Title: Applied Chemistry - Undergraduate study; specializations in: Environmental chemistry and green technologies, Advanced materials and technologies, Applied organic chemistry; Course: Environmental chemistry and green technologies; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) primijenjene kemije (sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) primijenjene kemije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2024-11-17 20:16:23