Spin-sate reconfiguration induced by alternating magnetic field for efficient oxygen evolution reaction

Oxygen evolution reaction (OER) plays a determining role in electrochemical energy conversion devices, but challenges remain due to the lack of effective low-cost electrocatalysts and insufficient understanding about sluggish reaction kinetics. Distinguish from complex nano-structuring, this work fo...

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Vydáno v:	Nature communications Ročník 12; číslo 1; s. 4827 - 9
Hlavní autoři:	Zhou, Gang, Wang, Peifang, Li, Hao, Hu, Bin, Sun, Yan, Huang, Rong, Liu, Lizhe
Médium:	Journal Article
Jazyk:	angličtina
Vydáno:	England Nature Portfolio 10.08.2021
ISSN:	2041-1723, 2041-1723
On-line přístup:	Získat plný text
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Shrnutí:	Oxygen evolution reaction (OER) plays a determining role in electrochemical energy conversion devices, but challenges remain due to the lack of effective low-cost electrocatalysts and insufficient understanding about sluggish reaction kinetics. Distinguish from complex nano-structuring, this work focuses on the spin-related charge transfer and orbital interaction between catalysts and intermediates to accelerate catalytic reaction kinetics. Herein, we propose a simple magnetic-stimulation approach to rearrange spin electron occupation in noble-metal-free metal-organic frameworks (MOFs) with a feature of thermal-differentiated superlattice, in which the localized magnetic heating in periodic spatial distribution makes the spin flip occur at particular active sites, demonstrating a spin-dependent reaction pathway. As a result, the spin-rearranged Co Mn MOF displays mass activities of 3514.7 A g with an overpotential of ~0.27 V, which is 21.1 times that of pristine MOF. Our findings provide a new paradigm for designing spin electrocatalysis and steering reaction kinetics.
Bibliografie:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	2041-1723 2041-1723
DOI:	10.1038/s41467-021-25095-4