elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Privacy Policy | Contact | Deutsch
Fontsize: [-] Text [+]

Graphene-Based Electrocatalysts for Oxygen Reduction Reaction in High Temperature Proton Exchange Membrane Fuel Cells

Schonvogel, Dana (2019) Graphene-Based Electrocatalysts for Oxygen Reduction Reaction in High Temperature Proton Exchange Membrane Fuel Cells. Dissertation, Carl von Ossietzky Universität Oldenburg.

[img] PDF
12MB

Official URL: http://oops.uni-oldenburg.de/3827/

Abstract

Proton exchange membrane fuel cells play an essential role in a sustainable energy supply. However, a great challenge is the catalyst degradation regarding Pt instability and carbon corrosion. Nanocomposites combine the carbon support with corrosion-resistant metal oxides. In this study, tin-doped indium (III) oxide (ITO) and fluorine-doped tin (IV) oxide (FTO) are precipitated on reduced graphene oxide (rGO) and compared to multi-walled carbon nanotubes (MWCNTs), carbon black, carbon from hydrothermal carbonization (HTC-C) and rGO. Stress testing (0.05–1.47 VRHE) is used to assess their electrochemical durability. MWCNTs with the lowest specific surface area of 111 m2 g-1 and HTC-C with highest amorphousness and specific surface area of 546 m2 g-1 are most opposite, whereas HTC-C shows the strongest degradation. In case of the composites, degradation of FTO–rGO is insignificant, but ITO–rGO suffers from ITO degradation and carbon corrosion. In conclusion, FTO is not only more stable but persistently protects rGO from corrosion, so that the choice of metal oxide is crucial for catalyst’s durability.

Item URL in elib:https://elib.dlr.de/129919/
Document Type:Thesis (Dissertation)
Title:Graphene-Based Electrocatalysts for Oxygen Reduction Reaction in High Temperature Proton Exchange Membrane Fuel Cells
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Schonvogel, Danadana.schonvogel (at) dlr.dehttps://orcid.org/0000-0002-2485-740X
Date:2019
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Number of Pages:170
Status:Published
Keywords:Sauerstoff, Reduktion (Chemie), Chemische Reaktion, Elektrokatalyse, Polymer-Elektrolytmembran-Brennstoffzelle
Institution:Carl von Ossietzky Universität Oldenburg
Department:Fakultät für Mathematik und Naturwissenschaften
HGF - Research field:Energy
HGF - Program:Technology, Innovation and Society
HGF - Program Themes:Renewable Energy and Material Resources for Sustainable Futures - Integrating at Different Scales
DLR - Research area:Energy
DLR - Program:E SY - Energy Systems Analysis
DLR - Research theme (Project):E - Energy Systems Technology
Location: Oldenburg
Institutes and Institutions:Institute of Networked Energy Systems > Fuel Cells
Deposited By: Lorenz, Julian
Deposited On:28 Oct 2019 17:02
Last Modified:09 Apr 2020 13:02

Repository Staff Only: item control page

Browse
Search
Help & Contact
Information
electronic library is running on EPrints 3.3.12
Copyright © 2008-2017 German Aerospace Center (DLR). All rights reserved.