Single-Phase Pyrochlore Y2Ir2O7 Electrocatalyst on the Activity of Oxygen Evolution Reaction

Pei Chieh Shih; Jaemin Kim; Cheng Jun Sun; Hong Yang

doi:10.1021/acsaem.8b00691

Single-Phase Pyrochlore Y₂Ir₂O₇ Electrocatalyst on the Activity of Oxygen Evolution Reaction

Pei Chieh Shih, Jaemin Kim, Cheng Jun Sun, Hong Yang

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

Abstract

Single-phase pyrochlore-type Y₂Ir₂O₇ electrocatalyst was made through the sol-gel synthesis. This catalyst has high activity and stability toward oxygen evolution reaction (OER) in acid. Chronopotentiometry analysis shows no major changes in overpotential for more than 24 h measurement at 10 mA/cm²_geo. Transmission electron microscopy shows no formation of a new shell layer after the OER tests. X-ray absorption spectroscopy (XAS) was used to examine the single-electron filling in the e″ orbital of Ir 5d states, which could contribute to the improved OER activity.

Original language	English (US)
Pages (from-to)	3992-3998
Number of pages	7
Journal	ACS Applied Energy Materials
Volume	1
Issue number	8
DOIs	https://doi.org/10.1021/acsaem.8b00691
State	Published - Aug 27 2018

Keywords

YIrO
electrocatalysis
oxygen evolution reaction
pyrochlore
water splitting

ASJC Scopus subject areas

Chemical Engineering (miscellaneous)
Energy Engineering and Power Technology
Electrochemistry
Materials Chemistry
Electrical and Electronic Engineering

Online availability

10.1021/acsaem.8b00691

Library availability

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Cite this

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title = "Single-Phase Pyrochlore Y2Ir2O7 Electrocatalyst on the Activity of Oxygen Evolution Reaction",

abstract = "Single-phase pyrochlore-type Y2Ir2O7 electrocatalyst was made through the sol-gel synthesis. This catalyst has high activity and stability toward oxygen evolution reaction (OER) in acid. Chronopotentiometry analysis shows no major changes in overpotential for more than 24 h measurement at 10 mA/cm2geo. Transmission electron microscopy shows no formation of a new shell layer after the OER tests. X-ray absorption spectroscopy (XAS) was used to examine the single-electron filling in the e″ orbital of Ir 5d states, which could contribute to the improved OER activity.",

keywords = "YIrO, electrocatalysis, oxygen evolution reaction, pyrochlore, water splitting",

author = "Shih, {Pei Chieh} and Jaemin Kim and Sun, {Cheng Jun} and Hong Yang",

year = "2018",

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T1 - Single-Phase Pyrochlore Y2Ir2O7 Electrocatalyst on the Activity of Oxygen Evolution Reaction

AU - Shih, Pei Chieh

AU - Kim, Jaemin

AU - Sun, Cheng Jun

AU - Yang, Hong

PY - 2018/8/27

Y1 - 2018/8/27

N2 - Single-phase pyrochlore-type Y2Ir2O7 electrocatalyst was made through the sol-gel synthesis. This catalyst has high activity and stability toward oxygen evolution reaction (OER) in acid. Chronopotentiometry analysis shows no major changes in overpotential for more than 24 h measurement at 10 mA/cm2geo. Transmission electron microscopy shows no formation of a new shell layer after the OER tests. X-ray absorption spectroscopy (XAS) was used to examine the single-electron filling in the e″ orbital of Ir 5d states, which could contribute to the improved OER activity.

AB - Single-phase pyrochlore-type Y2Ir2O7 electrocatalyst was made through the sol-gel synthesis. This catalyst has high activity and stability toward oxygen evolution reaction (OER) in acid. Chronopotentiometry analysis shows no major changes in overpotential for more than 24 h measurement at 10 mA/cm2geo. Transmission electron microscopy shows no formation of a new shell layer after the OER tests. X-ray absorption spectroscopy (XAS) was used to examine the single-electron filling in the e″ orbital of Ir 5d states, which could contribute to the improved OER activity.

KW - YIrO

KW - electrocatalysis

KW - oxygen evolution reaction

KW - pyrochlore

KW - water splitting

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