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Electrochemical Analysis of Synthetized Iridium Nanoparticles for Oxygen Evolution Reaction in Acid Medium

Lettenmeier, Philipp and Majchel, Jan and Wang, Li and Gago, Aldo and Friedrich, K. Andreas (2016) Electrochemical Analysis of Synthetized Iridium Nanoparticles for Oxygen Evolution Reaction in Acid Medium. ECS Transactions, 72 (23), pp. 1-9. Electrochemical Society, Inc.. DOI: 10.1149/07223.0001ecst ISSN 1938-5862

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Official URL: http://ecst.ecsdl.org/content/72/23/1.abstract


The anode side catalyst is one of the key parts for sustainable hydrogen production via proton exchange membrane (PEM) electrolysis. An optimized synthesis of the oxygen evolution reaction (OER) catalysts may lead to a cost efficient production, promoting the commercialization of new catalyst materials. This work compares the electrochemical characteristics of Ir nanoparticles synthetized in different purities of ethanol and deionized (DI) water as solvents. The use of cetyltrimethyl ammonium bromide (CTAB) as a surfactant is discussed as well. In general, the absence of the surfactant and use of either low ethanol purity or water is detrimental for electrocatalytic properties of the materials. Changes in the Tafel slope are observed, while the analysis of the specific exchange current can be misleading. The active sites from the IrIII/IrIV oxidation peak do not correlate exactly with the OER activities, while the capacitive current provides more meaningful information.

Item URL in elib:https://elib.dlr.de/107900/
Document Type:Article
Title:Electrochemical Analysis of Synthetized Iridium Nanoparticles for Oxygen Evolution Reaction in Acid Medium
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Lettenmeier, PhilippPhilipp.Lettenmeier (at) dlr.deUNSPECIFIED
Wang, Lili.wang (at) dlr.deUNSPECIFIED
Gago, Aldoaldo.gago (at) dlr.deUNSPECIFIED
Friedrich, K. Andreasandreas.friedrich (at) dlr.deUNSPECIFIED
Journal or Publication Title:ECS Transactions
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
DOI :10.1149/07223.0001ecst
Page Range:pp. 1-9
Publisher:Electrochemical Society, Inc.
Series Name:Hydrogen and Oxygen Evolution Catalysis for Water Electrolysis 2
Keywords:PEM Electrolyzer, Catalysts, OER, Hydrogen
HGF - Research field:Energy
HGF - Program:Storage and Cross-linked Infrastructures
HGF - Program Themes:Electrolysis and Hydrogen
DLR - Research area:Energy
DLR - Program:E EV - Energy process technology
DLR - Research theme (Project):E - Electrochemical Processes (Electrolysis) (old)
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics > Electrochemical Energy Technology
Deposited By: Lettenmeier, Philipp
Deposited On:22 Nov 2016 09:59
Last Modified:01 Jan 2020 03:00

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