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Durability of Electrocatalysts for ORR: Pt on Nanocomposite of Reduced Graphene Oxide with FTO versus Pt/C

Schonvogel, Dana and Hülstede, Julia and Wagner, Peter and Dyck, Alexander and Agert, Carsten and Wark, Michael (2018) Durability of Electrocatalysts for ORR: Pt on Nanocomposite of Reduced Graphene Oxide with FTO versus Pt/C. Journal of The Electrochemical Society, 165 (6), F3373-F3382. Electrochemical Society, Inc.. doi: 10.1149/2.0361806jes. ISSN 0013-4651.

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Official URL: http://jes.ecsdl.org/content/165/6/F3373.abstract

Abstract

Catalyst degradation results in performance losses of proton exchange membrane fuel cells (PEMFC) and is caused by electrochemical instability of commonly used platinum on carbon black (Pt/C). In this study, a comparison in durability of commercial Pt/C with a new Pt catalyst on a nanocomposite of fluorine-doped SnO2 (FTO) and reduced graphene oxide (rGO) is carried out. Transmission electron microscopy (TEM) shows similar Pt distributions on support surfaces and Pt particle sizes so that a high comparability of support materials during durability investigation is ensured. High resolution TEM with EDS reveals dispersed Pt anchored at FTO-rGO interfaces. During stripping voltammetry Pt/FTO-rGO provides weaker CO sorption than Pt/C, indicating higher CO tolerances. Accelerated stress testing (0.05-1.47 VRHE) provokes Pt degradation on both supports in comparable rates. However, the FTO-rGO nanocomposite presents the more stable substrate in this study compared to carbon black. Identical location TEM illustrates stable FTO particles in size and position on rGO surface. Moreover, unchanged hydroquinone/quinone (HQ/Q) amounts and double layer capacitance in case of Pt/FTO-rGO were revealed by cyclic voltammetry. On the contrary, standard Pt/C shows significantly more generation of HQ/Q functionalities by a factor of 25 and thus higher carbon corrosion.

Item URL in elib:https://elib.dlr.de/127307/
Document Type:Article
Title:Durability of Electrocatalysts for ORR: Pt on Nanocomposite of Reduced Graphene Oxide with FTO versus Pt/C
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Schonvogel, Danadana.schonvogel (at) dlr.dehttps://orcid.org/0000-0002-2485-740X
Hülstede, Juliajulia.huelstede (at) dlr.dehttps://orcid.org/0000-0001-7822-8425
Wagner, Peterp.wagner (at) dlr.dehttps://orcid.org/0000-0002-5644-9881
Dyck, Alexanderalexander.dyck (at) dlr.dehttps://orcid.org/0000-0002-5010-8226
Agert, Carstencarsten.agert (at) dlr.dehttps://orcid.org/0000-0003-4733-5257
Wark, MichaelCarl von Ossietzky Universityhttps://orcid.org/0000-0002-8725-0103
Date:8 May 2018
Journal or Publication Title:Journal of The Electrochemical Society
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:165
DOI :10.1149/2.0361806jes
Page Range:F3373-F3382
Publisher:Electrochemical Society, Inc.
ISSN:0013-4651
Status:Published
Keywords:PEMFC, oxygen reduction reaction, Accelerated stress testing, electrochemical surface area, Catalyst degradation
HGF - Research field:Energy
HGF - Program:Storage and Cross-linked Infrastructures
HGF - Program Themes:Fuel cells
DLR - Research area:Energy
DLR - Program:E SP - Energy Storage
DLR - Research theme (Project):E - Electrochemical Processes (Fuel Cells) (old)
Location: Oldenburg
Institutes and Institutions:Institute of Networked Energy Systems > Fuel Cells
Deposited By: Lorenz, Julian
Deposited On:14 Aug 2019 18:36
Last Modified:29 Apr 2020 18:16

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