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 P. Paulikas,Dusan Strmcnik,Yong-Tae Kim,Deborah J. Myers,Vojislav R. Stamenkovic,Nenad M. Markovic +11 more
TLDR
A new synthesis strategy is developed 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.Abstract:
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.read more
Citations
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Energy and fuels from electrochemical interfaces
TL;DR: Common descriptors such as the substrate-hydroxide binding energy and the interactions in the double layer between hydroxide-oxides and H---OH are found to control individual parts of the hydrogen and oxygen electrochemistry that govern the efficiency of water-based energy conversion and storage systems.
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Electrocatalytic Oxygen Evolution Reaction in Acidic Environments – Reaction Mechanisms and Catalysts
TL;DR: In this article, the current state of our understanding of the OER mechanism on PEM-compatible heterogeneous electrocatalysts, before comparing and contrast that to the OOR mechanism on homogenous catalysts.
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Robust noble metal-based electrocatalysts for oxygen evolution reaction
TL;DR: This tutorial review covered the recent progress in the composition and structure optimization of NMEs for OER including Ir- and Ru-based oxides and alloys, and noble-metals beyond Ir and Ru with a variety of morphologies.
Journal ArticleDOI
FeOOH/Co/FeOOH Hybrid Nanotube Arrays as High-Performance Electrocatalysts for the Oxygen Evolution Reaction.
TL;DR: The FeOOH/Co/FeOOH HNTAs exhibit high Electrocatalytic performance for OER, such as low onset potential, small Tafel slope, and excellent long-term durability, and they are promising electrocatalysts for O ER in alkaline solution.
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Design and Synthesis of FeOOH/CeO2 Heterolayered Nanotube Electrocatalysts for the Oxygen Evolution Reaction.
TL;DR: This study provides a new route to the design and fabrication of electrocatalysts with high electroactivity and durability for oxygen evolution with FeOOH/CeO2 heterolayered nanotubes supported on Ni foam.
References
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