Issue 37, 2022

Promoting oxygen reduction via coordination environment modulation through secondary metal-atom incorporation

Abstract

Fe-based single-atom catalysts (SACs) have been recognized as attractive candidates for the oxygen reduction reaction (ORR). However, several limitations such as unsatisfactory intrinsic activity and poor stability hinder their practical applications, motivating further optimization of Fe-SACs which requires precise control of their composition and coordination environment. Herein, we establish a facile solvothermal method to incorporate Cu into Fe-SACs to form heterometallic SACs. We observe that the adjacent Cu atoms can regulate the coordination environment of FeN4 sites and significantly enhance the ORR activity. As a result, the heterometallic SACs show superior ORR catalytic performance compared to the mono-Fe-SAC counterpart (an enhancement factor of ∼5 times), delivering a half-wave potential (E1/2) of 0.889 V vs. RHE and a high kinetic current density (jk) of 4.77 mA cm−2 at 0.9 V vs. RHE, and also outperform the state-of-the-art Pt/C catalyst under identical testing conditions.

Graphical abstract: Promoting oxygen reduction via coordination environment modulation through secondary metal-atom incorporation

Supplementary files

Article information

Article type
Communication
Submitted
12 мар 2022
Accepted
22 май 2022
First published
25 май 2022

J. Mater. Chem. A, 2022,10, 19626-19634

Promoting oxygen reduction via coordination environment modulation through secondary metal-atom incorporation

H. Yang, T. Zhang, X. Chi, X. Yu, J. Chen, J. Chen, C. Li, S. Tan, Q. He, X. Wang and L. Wang, J. Mater. Chem. A, 2022, 10, 19626 DOI: 10.1039/D2TA01962K

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements