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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 towards oxygen evolution reaction (OER) in acid. Here, chronopotentiometry analysis showed no obvious change in overpotential for more than 24 h measurement at 10 mA/cm2geo. X-ray absorption spectroscopy (XAS) demonstrates that the single electron filling in e" orbital of Ir 5d states, induced by the spin-orbital coupling, could contribute to the improved OER activity.

Authors:
 [1];  [1];  [2]; ORCiD logo [1]
  1. Univ. of Illinois at Urbana−Champaign, Urbana, IL (United States)
  2. Argonne National Lab. (ANL), Argonne, IL (United States)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC); University of Illinois System
OSTI Identifier:
1497018
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
ACS Applied Energy Materials
Additional Journal Information:
Journal Volume: 1; Journal Issue: 8; Journal ID: ISSN 2574-0962
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; Y2Ir2O7; electrocatalysis; oxygen evolution reaction; pyrochlore; water splitting

Citation Formats

Shih, Pei -Chieh, Kim, Jaemin, Sun, Cheng -Jun, and Yang, Hong. Single-Phase Pyrochlore Y2Ir2O7 Electrocatalyst on the Activity of Oxygen Evolution Reaction. United States: N. p., 2018. Web. doi:10.1021/acsaem.8b00691.
Shih, Pei -Chieh, Kim, Jaemin, Sun, Cheng -Jun, & Yang, Hong. Single-Phase Pyrochlore Y2Ir2O7 Electrocatalyst on the Activity of Oxygen Evolution Reaction. United States. https://doi.org/10.1021/acsaem.8b00691
Shih, Pei -Chieh, Kim, Jaemin, Sun, Cheng -Jun, and Yang, Hong. 2018. "Single-Phase Pyrochlore Y2Ir2O7 Electrocatalyst on the Activity of Oxygen Evolution Reaction". United States. https://doi.org/10.1021/acsaem.8b00691. https://www.osti.gov/servlets/purl/1497018.
@article{osti_1497018,
title = {Single-Phase Pyrochlore Y2Ir2O7 Electrocatalyst on the Activity of Oxygen Evolution Reaction},
author = {Shih, Pei -Chieh and Kim, Jaemin and Sun, Cheng -Jun and Yang, Hong},
abstractNote = {Single phase pyrochlore-type Y2Ir2O7 electrocatalyst was made through the sol-gel synthesis. This catalyst has high activity and stability towards oxygen evolution reaction (OER) in acid. Here, chronopotentiometry analysis showed no obvious change in overpotential for more than 24 h measurement at 10 mA/cm2geo. X-ray absorption spectroscopy (XAS) demonstrates that the single electron filling in e" orbital of Ir 5d states, induced by the spin-orbital coupling, could contribute to the improved OER activity.},
doi = {10.1021/acsaem.8b00691},
url = {https://www.osti.gov/biblio/1497018}, journal = {ACS Applied Energy Materials},
issn = {2574-0962},
number = 8,
volume = 1,
place = {United States},
year = {Thu Jul 26 00:00:00 EDT 2018},
month = {Thu Jul 26 00:00:00 EDT 2018}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Citation Metrics:
Cited by: 36 works
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Figures / Tables:

Figure 1 Figure 1: (a) PXRD and the corresponding Rietveld refinement with the residue plot, (b) SEM image, and (c) TEM micrograph of the as-made Y2Ir2O7 electrocatalyst. Color code: red, experimentally determined diffraction pattern; orange, simulated pattern; blue: residue; and gray, baseline. Inset shows an illustration of the unit cell of themore » pyrochlore structure.« less

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Works referencing / citing this record:

Quadruple perovskite ruthenate as a highly efficient catalyst for acidic water oxidation
journal, August 2019


A Porous Pyrochlore Y 2 [Ru 1.6 Y 0.4 ]O 7– δ Electrocatalyst for Enhanced Performance towards the Oxygen Evolution Reaction in Acidic Media
journal, October 2018


Coexistence of high electrical conductivity and weak ferromagnetism in Cr doped Y 2Ir 2O 7 pyrochlore iridates
journal, June 2019


Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.