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Title: A Porous Pyrochlore Y2[Ru1.6Y0.4]O7–δ Electrocatalyst for Enhanced Performance towards the Oxygen Evolution Reaction in Acidic Media

Abstract

A robust porous structure is often needed for practical applications in electrochemical devices, such as fuel cells, batteries, and electrolyzers. While templating approach is useful for the preparation of porous materials in general, it is not effective for the synthesis of oxide-based electrocatalysts owing to the chemical instability of disordered porous materials thus created. Now the synthesis of phase-pure porous yttrium ruthenate pyrochlore oxide using an unconventional porogen of perchloric acid is presented here. The lattice oxygen defects are formed by the mixed-valence state of Ru4+/5+ through the partial substitution of Ru4+ with Y3+ cations, leading to the formation of mixed B-site Y2[Ru1.6Y0.4]O7-δ. This porous Y2[Ru1.6Y0.4]O7-δ electrocatalyst exhibits a turnover frequency (TOF) of 560 s-1 (at 1.5 V versus RHE) for the oxygen evolution reaction, which is two orders of magnitude higher than that of the RuO2 reference catalyst (5.41 s-1).

Authors:
ORCiD logo [1];  [1];  [2];  [1];  [3]; ORCiD logo [1]
  1. Univ. of Illinois, Urbana, IL (United States). Dept. of Chemical and Biomolecular Engineering
  2. Univ. of Illinois, Urbana, IL (United States). Dept. of Chemical and Biomolecular Engineering; Tongji Univ., Shanghai (China). The Inst. for Advanced Materials & Nano Biomedicine
  3. Argonne National Lab. (ANL), Argonne, IL (United States). X-ray Science Division
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States); Univ. of Illinois at Urbana-Champaign, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC); Univ. of Illinois (United States); China Scholarship Council
OSTI Identifier:
1494800
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Angewandte Chemie (International Edition)
Additional Journal Information:
Journal Name: Angewandte Chemie (International Edition); Journal Volume: 57; Journal Issue: 42; Journal ID: ISSN 1433-7851
Publisher:
Wiley
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; electrocatalysis; oxygen evolution reaction; porous metal oxides; pyrochlore; water splitting

Citation Formats

Kim, Jaemin, Shih, Pei-Chieh, Qin, Yao, Al-Bardan, Zaid, Sun, Cheng-Jun, and Yang, Hong. A Porous Pyrochlore Y2[Ru1.6Y0.4]O7–δ Electrocatalyst for Enhanced Performance towards the Oxygen Evolution Reaction in Acidic Media. United States: N. p., 2018. Web. doi:10.1002/anie.201808825.
Kim, Jaemin, Shih, Pei-Chieh, Qin, Yao, Al-Bardan, Zaid, Sun, Cheng-Jun, & Yang, Hong. A Porous Pyrochlore Y2[Ru1.6Y0.4]O7–δ Electrocatalyst for Enhanced Performance towards the Oxygen Evolution Reaction in Acidic Media. United States. doi:10.1002/anie.201808825.
Kim, Jaemin, Shih, Pei-Chieh, Qin, Yao, Al-Bardan, Zaid, Sun, Cheng-Jun, and Yang, Hong. Thu . "A Porous Pyrochlore Y2[Ru1.6Y0.4]O7–δ Electrocatalyst for Enhanced Performance towards the Oxygen Evolution Reaction in Acidic Media". United States. doi:10.1002/anie.201808825. https://www.osti.gov/servlets/purl/1494800.
@article{osti_1494800,
title = {A Porous Pyrochlore Y2[Ru1.6Y0.4]O7–δ Electrocatalyst for Enhanced Performance towards the Oxygen Evolution Reaction in Acidic Media},
author = {Kim, Jaemin and Shih, Pei-Chieh and Qin, Yao and Al-Bardan, Zaid and Sun, Cheng-Jun and Yang, Hong},
abstractNote = {A robust porous structure is often needed for practical applications in electrochemical devices, such as fuel cells, batteries, and electrolyzers. While templating approach is useful for the preparation of porous materials in general, it is not effective for the synthesis of oxide-based electrocatalysts owing to the chemical instability of disordered porous materials thus created. Now the synthesis of phase-pure porous yttrium ruthenate pyrochlore oxide using an unconventional porogen of perchloric acid is presented here. The lattice oxygen defects are formed by the mixed-valence state of Ru4+/5+ through the partial substitution of Ru4+ with Y3+ cations, leading to the formation of mixed B-site Y2[Ru1.6Y0.4]O7-δ. This porous Y2[Ru1.6Y0.4]O7-δ electrocatalyst exhibits a turnover frequency (TOF) of 560 s-1 (at 1.5 V versus RHE) for the oxygen evolution reaction, which is two orders of magnitude higher than that of the RuO2 reference catalyst (5.41 s-1).},
doi = {10.1002/anie.201808825},
journal = {Angewandte Chemie (International Edition)},
number = 42,
volume = 57,
place = {United States},
year = {2018},
month = {8}
}

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Cited by: 14 works
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    Works referencing / citing this record:

    Double Perovskite LaFe x Ni 1− x O 3 Nanorods Enable Efficient Oxygen Evolution Electrocatalysis
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