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Using Surface Segregation To Design Stable Ru-Ir Oxides for the Oxygen Evolution Reaction in Acidic Environments
Journal article   Open access   Peer reviewed

Using Surface Segregation To Design Stable Ru-Ir Oxides for the Oxygen Evolution Reaction in Acidic Environments

Nemanja Danilovic, Ramachandran Subbaraman, Kee Chul Chang, Seo Hyoung Chang, Yijin Kang, Joshua Snyder, Arvydas Paul Paulikas, Dusan Strmcnik, Yong Tae Kim, Deborah Myers, …
Angewandte Chemie (International ed.), v 53(51), pp 14016-14021
15 Dec 2014
PMID: 25297010
url
https://www.osti.gov/biblio/1356239View

Abstract

Chemistry Chemistry, Multidisciplinary Physical Sciences Science & Technology
The methods used to improve catalytic activity are well-established, however elucidating the factors that simultaneously control activity and stability is still lacking, especially for oxygen evolution reaction (OER) catalysts. Here, by studying fundamental links between the activity and stability of well-characterized monometallic and bimetallic oxides, we found that there is generally an inverse relationship between activity and stability. To overcome this limitation, we developed a new synthesis strategy that is based on tuning the near-surface composition of Ru and Ir elements by surface segregation, thereby resulting in the formation of a nanosegregated domain that balances the stability and activity of surface atoms. We demonstrate that a Ru0.5Ir0.5 alloy synthesized by using this method exhibits four-times higher stability than the best Ru-Ir oxygen evolution reaction materials, while still preserving the same activity.

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UN Sustainable Development Goals (SDGs)

This publication has contributed to the advancement of the following goals:

#7 Affordable and Clean Energy

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Collaboration types
Domestic collaboration
International collaboration
Web of Science research areas
Chemistry, Multidisciplinary
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