In:
Journal of Materials Chemistry A, Royal Society of Chemistry (RSC), Vol. 10, No. 37 ( 2022), p. 19626-19634
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 FeN 4 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 ( E 1/2 ) of 0.889 V vs. RHE and a high kinetic current density ( j k ) 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.
Type of Medium:
Online Resource
ISSN:
2050-7488
,
2050-7496
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2022
detail.hit.zdb_id:
2702232-8
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