Synthesis and characterization of nickel zinc oxide nanoparticles and their investigation as water oxidation catalyst

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2020-10

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Ağcalı, Rahime Yağmur

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The depletion of fossil fuels has steered attention to discover new energy sources. Fossil fuels are not desirable to use because of their hazardous effects on earth and being non-renewable, yet they have been used as primary energy sources all over the world. Due to their limited amount, the focus of research has become maintaining renewable, green, and clean energy. In this sense, among others hydrogen has a great potential for being a primary source. The possible supplied energy from hydrogen is great and it is clean with no waste. One of the easy ways of producing hydrogen is splitting water. However, half reactions of this process, particularly the anode (water oxidation/oxygen evolution) reaction, are slow and require high energy to proceed. Catalysts can be used to overcome these difficulties. For these reactions, Ru and Ir metals are known as the best catalysts but they are quite expensive and precious. Thus, one of the focus of research in hydrogen production is to synthesize alternative catalysts. For this, heterogeneous metal oxide nanoparticles are gaining great attention due to having high surface area and large numbers of active sites. This thesis study is focused on the synthesis of nickel zinc metal oxide nanoparticles, their characterization by Scanning Electron Microscopy (SEM), Energy Dispersive X-ray Spectroscopy (EDX), X-Ray Diffraction (XRD), X-Ray Photoelectron Spectrometry vi (XPS), Brunauer-Teller-Emmet (BET) Isotherm and Transmission Electron Microscopy (TEM) techniques and further, their investigation of electrochemical activities as catalyst in water oxidation reactions.

Subject Keywords

Clean energy, Nanoparticles, Heterogeneous metal oxides, Water oxidation, Electrocatalyst

URI

https://hdl.handle.net/11511/69194

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Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

R. Y. Ağcalı, “Synthesis and characterization of nickel zinc oxide nanoparticles and their investigation as water oxidation catalyst,” M.S. - Master of Science, Middle East Technical University, 2020.