Abstract
HighlightsThe 2.27-nm-thick hybridized quasi-2D structure of La2O3 crystalline nanoparticles embedded in La2O3 amorphous nanosheets (La2O3@NP-NS) exhibited a low overpotential of 310 mV at 10 mA cm−2.The mass activity of La2O3@NP-NS reached as high as 6666.7 A g−1 at overpotential of 310 mV. Such a high mass activity was more than three orders of magnitude higher than that of benchmark IrO2 (4.4 A g−1) and RuO2 (2.05 A g−1) and five orders of magnitude higher than that of commercial La2O3 (0.048 A g−1).
Highlights
Today, oxygen evolution reaction (OER) is becoming an increasingly important process in many clean, renewable, and scalable electrochemical energy conversion and storage systems, such as fuel cells, electrochemical water splitting, solar fuel generation, and metal–air batteries [1,2,3,4,5,6,7,8,9,10]
The L a2O3 nanosheets were synthesized by ionic layer epitaxy (ILE) process
Under weak alkaline conditions, La3+ could combine with OH− to form Ce(OH)3, which would be dehydrated to L a2O3 after subsequent drying in the air
Summary
Oxygen evolution reaction (OER) is becoming an increasingly important process in many clean, renewable, and scalable electrochemical energy conversion and storage systems, such as fuel cells, electrochemical water splitting, solar fuel generation, and metal–air batteries [1,2,3,4,5,6,7,8,9,10]. Hybridization of 2D materials with nanoparticles (NPs) could offer an even greater boost to the electrochemical properties by combining the structural and electronic advantages of different morphologies [30, 33,34,35], such as lower the over potential of hydrogen evolution reaction (HER), and even raise the reversible capacity of lithiumion batteries [36, 37] Inspired by these previous advancements, reducing the dimension of La2O3 to a 2D structure and hybridizing with electrochemical active NPs may be a promising route leading L a2O3 toward a high-performance electrochemical catalytic material in many energy conversion and storage systems. This development presents an effective and scalable approach toward high-performance OER catalysts with a minimal use of precious rare-earth elements
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
