Kirkendall oxidation tailors lattice strain in transition metal oxides for efficient oxygen electrocatalysis
Matter, ISSN: 2590-2385, Vol: 7, Issue: 3, Page: 1245-1258
2024
- 13Citations
- 2Captures
- 1Mentions
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Most Recent News
Recent Findings from Donghua University Provides New Insights into Chemicals and Chemistry (Kirkendall Oxidation Tailors Lattice Strain In Transition Metal Oxides for Efficient Oxygen Electrocatalysis)
2024 MAY 17 (NewsRx) -- By a News Reporter-Staff News Editor at Chemicals & Chemistry Daily Daily -- Investigators publish new report on Chemicals and
Article Description
Advanced electrocatalysts for oxygen reduction/evolution reaction (ORR/OER) are pivotal to clean energy conversions. Lattice strain has been found to effectively enhance catalytic performance in transition metal oxides (TMOs), but precise control is challenging with conventional bulk processing methods. Herein, we report the regulation of lattice strain (ranging from 0% to 2.2%) in TMOs through Kirkendall diffusion, enabling us to chart the strain-dependent electrocatalysis. The Co 3 O 4 400 plane with an optimal 1.8% tensile strain delivers an ORR half-wave potential of 0.86 V and a small OER overpotential of 0.30 V at 10 mA cm −2 in alkaline environments, located among the top TMO-based electrocatalysts. X-ray absorption spectra and density functional theory calculations collectively suggest that tensile strain simultaneously optimizes the adsorption of ∗ OOH and the desorption of ∗ OH on adjacent Co atoms. This work provides new insights into regulating strain in TMOs for advanced oxygen electrocatalysis, which is extendable to other catalytic applications.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S2590238524000110; http://dx.doi.org/10.1016/j.matt.2024.01.013; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85186280187&origin=inward; https://linkinghub.elsevier.com/retrieve/pii/S2590238524000110; https://dx.doi.org/10.1016/j.matt.2024.01.013
Elsevier BV
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