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

Angewandte Chemie
Jaemin KimHong Yang

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. 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 [Ru1.6 Y0.4 ]O7-δ . This porous Y2 [Ru1.6 Y0.4 ]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 ).

References

Nov 5, 2013·Nature Materials·Yan-Yan HuClare P Grey
Sep 10, 2014·Angewandte Chemie·Kripasindhu SardarRichard I Walton
Oct 9, 2014·Journal of the American Chemical Society·Jaemin KimHong Yang
Feb 11, 2015·Journal of the American Chemical Society·Charles C L McCroryThomas F Jaramillo
Apr 1, 2015·Dalton Transactions : an International Journal of Inorganic Chemistry·Stefan RieggStefan G Ebbinghaus
Feb 2, 2012·The Journal of Physical Chemistry Letters·Youngmin LeeYang Shao-Horn
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Oct 5, 2016·Science·Linsey C SeitzThomas F Jaramillo
Apr 22, 2017·Nature Chemistry·Alexis GrimaudYang Shao-Horn
Jul 28, 2017·Journal of the American Chemical Society·Jaemin KimHong Yang

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Citations

Jul 16, 2020·Advanced Materials·Hui ChenXiaoxin Zou
Aug 23, 2019·Materials·Albina I Orlova, Michael I Ojovan
Apr 22, 2021·Dalton Transactions : an International Journal of Inorganic Chemistry·Lu AnJunliang Zhang
Mar 29, 2020·Journal of the American Chemical Society·Denis A KuznetsovChristoph R Müller
Oct 6, 2021·Chemical Reviews·Linlin DuanDongyuan Zhao
Jan 13, 2022·Advanced Science·Yuxi HouYiyin Huang

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