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Synthesis and characterization of a carbon supported transition metal phosphide for the oxygen evolution reaction

Azevedo Lima Teixeira, Maria Carolina (2019) Synthesis and characterization of a carbon supported transition metal phosphide for the oxygen evolution reaction. Master's, Universidade do Porto.

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Abstract

Metal-air batteries have been received increasingly more attention because of their remarkably high energy density when compared to other types rechargeable batteries, such as lithium-ion. Even though, they are promising source of power for next-generation electronics, transportation and energy storage, they still have numerous technical challenges that must be overcome. This work aims at to develop non-noble transition metal catalysts to improve the overall performance of metal-air batteries and provide an alternative to noble metal-based catalysts, which suffer from multiple disadvantages such as high cost and poor stability. Four catalysts were studied for the positive electrode targeting the enhancement of the oxygen reduction/evolution reactions. Transition-metal phosphides and carbon supported catalysts were synthesized, tested and characterized (in situ and ex situ). Based on literature information and on the experience of the research team, Ni2P, Ni2P/CNT, Ni2P-Fe/CNT and Ni2P-Fe2O3/CNT were prepared and characterized and their performance assessed. It was proved that the addition of a carbon support improves the reactions current density and the synthesis of a bi-metal catalyst improves considerably the activity of catalysts. Furthermore, it was developed a new catalyst which improves considerably the performance of the oxygen evolution reaction compared with the reference iridium black electrode.

Item URL in elib:https://elib.dlr.de/128524/
Document Type:Thesis (Master's)
Title:Synthesis and characterization of a carbon supported transition metal phosphide for the oxygen evolution reaction
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Azevedo Lima Teixeira, Maria CarolinaUNSPECIFIEDUNSPECIFIED
Date:July 2019
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Metal-air batteries, air cathode, oxygen evolution reaction OER, oxygen reduction reaction ORR, electrocatalyst, non-noble metal catalyst, transition metal phosphide TMP, iron oxide, rotating disk electrode
Institution:Universidade do Porto
Department:Faculdade de Engenharia
HGF - Research field:Energy
HGF - Program:Storage and Cross-linked Infrastructures
HGF - Program Themes:Electrochemical Energy Storage
DLR - Research area:Energy
DLR - Program:E SP - Energy Storage
DLR - Research theme (Project):E - Electrochemical Prcesses (Batteries)
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics > Electrochemical Energy Technology
Deposited By: Majchel, Jan
Deposited On:22 Aug 2019 15:48
Last Modified:22 Aug 2019 15:48

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