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Spin pinning effect to reconstructed oxyhydroxide layer on ferromagnetic oxides for enhanced water oxidation
- Source :
- Nature communications, vol 12, iss 1, Nature Communications, Nature Communications, Vol 12, Iss 1, Pp 1-11 (2021), Nature Communications, 2021, 12 (1), pp.3634. ⟨10.1038/s41467-021-23896-1⟩
- Publication Year :
- 2021
- Publisher :
- Springer Science and Business Media LLC, 2021.
-
Abstract
- Producing hydrogen by water electrolysis suffers from the kinetic barriers in the oxygen evolution reaction (OER) that limits the overall efficiency. With spin-dependent kinetics in OER, to manipulate the spin ordering of ferromagnetic OER catalysts (e.g., by magnetization) can reduce the kinetic barrier. However, most active OER catalysts are not ferromagnetic, which makes the spin manipulation challenging. In this work, we report a strategy with spin pinning effect to make the spins in paramagnetic oxyhydroxides more aligned for higher intrinsic OER activity. The spin pinning effect is established in oxideFM/oxyhydroxide interface which is realized by a controlled surface reconstruction of ferromagnetic oxides. Under spin pinning, simple magnetization further increases the spin alignment and thus the OER activity, which validates the spin effect in rate-limiting OER step. The spin polarization in OER highly relies on oxyl radicals (O∙) created by 1st dehydrogenation to reduce the barrier for subsequent O-O coupling.<br />Water oxidation to triplet oxygen requires a spin polarization process for faster kinetics. Here, the authors show an interface spin pinning effect between ferromagnetic oxides and reconstructed oxyhydroxide surface layer, where the spin ordering in paramagnetic oxyhydroxide catalyst layer can be tuned to improve the intrinsic activity.
- Subjects :
- 120
Materials science
Hydrogen
Science
General Physics and Astronomy
chemistry.chemical_element
02 engineering and technology
010402 general chemistry
01 natural sciences
4016 Materials Engineering
General Biochemistry, Genetics and Molecular Biology
Condensed Matter::Materials Science
Magnetization
Paramagnetism
128
Physics::Chemical Physics
40 Engineering
Spin-½
Multidisciplinary
Spin polarization
Condensed matter physics
Spins
article
Oxygen evolution
[CHIM.MATE]Chemical Sciences/Material chemistry
General Chemistry
639/638/161/886
021001 nanoscience & nanotechnology
0104 chemical sciences
Ferromagnetism
chemistry
Condensed Matter::Strongly Correlated Electrons
Electrocatalysis
639/301/299/886
0210 nano-technology
51 Physical Sciences
Subjects
Details
- ISSN :
- 20411723
- Volume :
- 12
- Database :
- OpenAIRE
- Journal :
- Nature Communications
- Accession number :
- edsair.doi.dedup.....743e5312e341bdce33875e814ade5b0c