Activity and Durability of Iridium Nanoparticles in the Oxygen Evolution Reaction

Shaun Alia; Kenneth Neyerlin; Bryan Pivovar; Brian Rasimick; Chilan Ngo; Svitlana Pylypenko; Hui Xu; Shyam Kocha

doi:10.1149/2.0151611jes

Activity and Durability of Iridium Nanoparticles in the Oxygen Evolution Reaction

Shaun Alia, Kenneth Neyerlin, Bryan Pivovar, Brian Rasimick, Chilan Ngo, Svitlana Pylypenko, Hui Xu, Shyam Kocha

Chemistry and Nanoscience

Research output: Contribution to journal › Article › peer-review

169 Scopus Citations

Abstract

Unsupported iridium (Ir) nanoparticles, that serve as standard oxygen evolution reaction (OER) catalysts in acidic electrolyzers, were investigated for electrochemical performance and durability in rotating disk electrode (RDE) half-cells. Fixed potential holds and potential cycling were applied to probe the durability of Ir nanoparticles, and performance losses were found to be driven by particle growth (coarsening) atmoderate potential (1.4 to 1.6 V) and Irdissolution at higher potential (≥1.8 V). Several different commercially available samples were evaluated and standardized conditions for performance comparison are reported. The electrocatalyst RDE results have also been compared to results obtained for performance and durability in electrolysis cells.

Original language	American English
Pages (from-to)	F3105-F3112
Journal	Journal of the Electrochemical Society
Volume	163
Issue number	11
DOIs	https://doi.org/10.1149/2.0151611jes https://doi.org/10.1149/2.0151611jes
State	Published - 2016

Bibliographical note

Publisher Copyright:
© The Author(s) 2016.

NREL Publication Number

NREL/JA-5900-66915

Keywords

electrocatalysis
electrolysis
iridium

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https://www.nrel.gov/docs/fy16osti/66915.pdf

Cite this

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title = "Activity and Durability of Iridium Nanoparticles in the Oxygen Evolution Reaction",

abstract = "Unsupported iridium (Ir) nanoparticles, that serve as standard oxygen evolution reaction (OER) catalysts in acidic electrolyzers, were investigated for electrochemical performance and durability in rotating disk electrode (RDE) half-cells. Fixed potential holds and potential cycling were applied to probe the durability of Ir nanoparticles, and performance losses were found to be driven by particle growth (coarsening) atmoderate potential (1.4 to 1.6 V) and Irdissolution at higher potential (≥1.8 V). Several different commercially available samples were evaluated and standardized conditions for performance comparison are reported. The electrocatalyst RDE results have also been compared to results obtained for performance and durability in electrolysis cells.",

keywords = "electrocatalysis, electrolysis, iridium",

author = "Shaun Alia and Kenneth Neyerlin and Bryan Pivovar and Brian Rasimick and Chilan Ngo and Svitlana Pylypenko and Hui Xu and Shyam Kocha",

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doi = "10.1149/2.0151611jes",

language = "American English",

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pages = "F3105--F3112",

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T1 - Activity and Durability of Iridium Nanoparticles in the Oxygen Evolution Reaction

AU - Alia, Shaun

AU - Neyerlin, Kenneth

AU - Pivovar, Bryan

AU - Rasimick, Brian

AU - Ngo, Chilan

AU - Pylypenko, Svitlana

AU - Xu, Hui

AU - Kocha, Shyam

PY - 2016

Y1 - 2016

N2 - Unsupported iridium (Ir) nanoparticles, that serve as standard oxygen evolution reaction (OER) catalysts in acidic electrolyzers, were investigated for electrochemical performance and durability in rotating disk electrode (RDE) half-cells. Fixed potential holds and potential cycling were applied to probe the durability of Ir nanoparticles, and performance losses were found to be driven by particle growth (coarsening) atmoderate potential (1.4 to 1.6 V) and Irdissolution at higher potential (≥1.8 V). Several different commercially available samples were evaluated and standardized conditions for performance comparison are reported. The electrocatalyst RDE results have also been compared to results obtained for performance and durability in electrolysis cells.

AB - Unsupported iridium (Ir) nanoparticles, that serve as standard oxygen evolution reaction (OER) catalysts in acidic electrolyzers, were investigated for electrochemical performance and durability in rotating disk electrode (RDE) half-cells. Fixed potential holds and potential cycling were applied to probe the durability of Ir nanoparticles, and performance losses were found to be driven by particle growth (coarsening) atmoderate potential (1.4 to 1.6 V) and Irdissolution at higher potential (≥1.8 V). Several different commercially available samples were evaluated and standardized conditions for performance comparison are reported. The electrocatalyst RDE results have also been compared to results obtained for performance and durability in electrolysis cells.

KW - electrocatalysis

KW - electrolysis

KW - iridium

U2 - 10.1149/2.0151611jes

DO - 10.1149/2.0151611jes

M3 - Article

AN - SCOPUS:84979082339

SN - 0013-4651

VL - 163

SP - F3105-F3112

JO - Journal of the Electrochemical Society

JF - Journal of the Electrochemical Society

IS - 11

ER -

Activity and Durability of Iridium Nanoparticles in the Oxygen Evolution Reaction

Abstract

Bibliographical note

NREL Publication Number

Keywords

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