In:
Journal of Materials Chemistry A, Royal Society of Chemistry (RSC), Vol. 10, No. 47 ( 2022), p. 25307-25318
Abstract:
The precise configuration of metal pair sites at the atomic level in dual-metal single-atom catalysts (DACs) is key but challenging. Herein, we correlate the heteronuclear metal pair-site with the intrinsic structure of donor atoms in DACs, during which intramolecular heteroatoms, e.g. , methionine, are shown adept at narrowing the atomic spacing of metal atoms to produce pairwise active sites. Then, guided by this “intramolecular coordinating confinement” strategy, the biomass-derived nanocarbon-containing native intramolecular N,S heteroatoms are impressively applied to fabricate DACs with N,S–carbon coordinated uniform (Cu,Mn) hetero-nuclear active pairs on a gram-scale ( 〉 5 g). The as-synthesized (Cu,Mn)/NSC electrocatalyst exhibits superior oxygen reduction reaction (ORR) activity, delivering a half-wave potential of 0.93 V vs. RHE in alkaline media and 0.78 V vs. RHE in acid media. The unique microenvironment in DACs for the ORR is deeply visualized by simulated calculations. This work provides a solution to challenges in controllable and scalable fabrication of DACs.
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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