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

Gang Zhou, Peifang Wang (), Hao Li, Bin Hu, Yan Sun, Rong Huang and Lizhe Liu ()
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Gang Zhou: Hohai University
Peifang Wang: Hohai University
Hao Li: Hohai University
Bin Hu: Hohai University
Yan Sun: University of Utah
Rong Huang: Hohai University
Lizhe Liu: Nanjing University

Nature Communications, 2021, vol. 12, issue 1, 1-9

Abstract: Abstract 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 Co0.8Mn0.2 MOF displays mass activities of 3514.7 A gmetal−1 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.

Date: 2021
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DOI: 10.1038/s41467-021-25095-4

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