Electrocatalyst for acidic media and method of making an electrocatalyst for acidic media
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United States of America Patent
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Mar 5, 2019
Grant Date -
Nov 24, 2016
app pub date -
May 18, 2016
filing date -
May 20, 2015
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Abstract
An oxygen evolution reaction (OER) electrocatalyst for acidic media comprises a metal oxide structure comprising a pyrochlore phase of chemical formula A2B2On, wherein A comprises one or more A-site metals, B comprises one or more B-site metals, and 6.0≤n≤7.3. The metal oxide structure exhibits a mass current density of at least about 20 A/g at an over-potential of 0.22 V in 0.1 M HClO4. According to another embodiment, an electrocatalyst for acidic media comprises a porous metal oxide structure having particulate walls separating a plurality of pores, where each particulate wall comprises interconnected primary particles. The porous metal oxide structure comprises a pyrochlore phase of chemical formula A2B2On, wherein A comprises one or more A-site metals, B comprises one or more B-site metals, and 6.0≤n≤7.3.
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