Journal ArticleDOI
Spin dependent interactions catalyse the oxygen electrochemistry.
TLDR
The physical and catalytic properties of the most active compositions are only comprehensible with the consideration of magnetic interactions, and spin dependent potentials via exchange interactions, spin-orbit coupling or through magneto-electric effects catalyse the oxygen electrochemistry.Abstract:
The technological interest of oxygen reduction and evolution reactions, ORR and OER, for the clean use and storage of energy has resulted in the discovery of multiple catalysts; and the physical and catalytic properties of the most active compositions are only comprehensible with the consideration of magnetic interactions. Spin dependent potentials via exchange interactions, spin-orbit coupling or through magneto-electric effects catalyse the oxygen electrochemistry. The best catalysts show metal sites with localized spins and electron delocalization; a correlation exists between the rate constant for charge transfer reactions and spin-dependent electron mobility. Since during the OER and ORR the number of unpaired electrons is not conserved, magnetic potentials in optimum catalysts act as selective gates to enhance the transport of local spin currents. Overall magnetic potentials can reduce the bonding properties of the, donor or acceptor, orbitals in the catalyst, and electrons more easily transfer over the conduction band. The influence of spin dependent forces is generally applicable to oxygen catalysis, and supplements the physical interactions relevant for inorganic or organic, electro or photo, artificial or natural processes.read more
Citations
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Journal ArticleDOI
Direct magnetic enhancement of electrocatalytic water oxidation in alkaline media
Felipe A. Garcés-Pineda,Marta Blasco-Ahicart,David Nieto-Castro,Núria López,José Ramón Galán-Mascarós +4 more
TL;DR: In this article, the authors demonstrate that the water oxidation performance of mixed oxide NiZnFe4Ox catalysts can be improved by applying a magnetic field from a permanent magnet.
Journal ArticleDOI
Spin pinning effect to reconstructed oxyhydroxide layer on ferromagnetic oxides for enhanced water oxidation.
Tianze Wu,Xiao Ren,Yuanmiao Sun,Shengnan Sun,Guoyu Xian,Günther G. Scherer,Adrian C. Fisher,Daniel Mandler,Joel W. Ager,Alexis Grimaud,Junling Wang,Chengmin Shen,Haitao Yang,Jose Gracia,Hong-Jun Gao,Zhichuan J. Xu +15 more
TL;DR: In this paper, the spin ordering of ferromagnetic OER catalysts was manipulated to make the spins in paramagnetic oxyhydroxides more aligned for higher intrinsic OER activity.
Journal ArticleDOI
Engineering High-Spin State Cobalt Cations in Spinel Zinc Cobalt Oxide for Spin Channel Propagation and Active Site Enhancement in Water Oxidation.
TL;DR: In this article, the spin state of cobalt cations in spinel ZnCo 2 O 4 was found to propagate a spin channel to promote spin-selected charge transport during OER and generate better active sites for intermediates adsorption.
Journal ArticleDOI
Antiferromagnetic Inverse Spinel Oxide LiCoVO4 with Spin-Polarized Channels for Water Oxidation.
Riccardo Ruixi Chen,Yuanmiao Sun,Samuel Jun Hoong Ong,Shibo Xi,Yonghua Du,Chuntai Liu,Ovadia Lev,Zhichuan J. Xu +7 more
TL;DR: Density functional theory simulation results show that the layered antiferromagnetic LiCoVO4 studied contains magnetically polarized channels, which are able to enhance the selective removal of spin-oriented electrons from the reactants during the OER, which facilitates the accumulation of appropriate magnetic moments for triplet oxygen molecule evolution.
Journal ArticleDOI
Magnetic Field Stimulated Efficient Photocatalytic N2 Fixation over Defective BaTiO3 Perovskites.
Zhao Zhao,Dandan Wang,Rui Gao,Guobin Wen,Ming Feng,Guangxin Song,Jianbing Zhu,Dan Luo,Huaqiao Tan,Xin Ge,Wei Zhang,Yujun Zhang,Lirong Zheng,Haibo Li,Zhongwei Chen +14 more
TL;DR: In this article, a defective typical perovskite, BaTiO3, shows remarkable activity under an applied magnetic field for photocatalytic N2 fixation with the NH3 yield rate exceeding 1.90mg/L/h.
References
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Journal ArticleDOI
Spintronics: a spin-based electronics vision for the future.
Stuart A. Wolf,Stuart A. Wolf,David D. Awschalom,Robert A. Buhrman,J. M. Daughton,S. von Molnar,Michael L. Roukes,Almadena Chtchelkanova,Daryl Treger +8 more
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Journal ArticleDOI
Universality in Oxygen Evolution Electrocatalysis on Oxide Surfaces
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On the Theory of Electron-Transfer Reactions. VI. Unified Treatment for Homogeneous and Electrode Reactions
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Journal ArticleDOI
Design principles for oxygen-reduction activity on perovskite oxide catalysts for fuel cells and metal–air batteries
Jin Suntivich,Hubert A. Gasteiger,Hubert A. Gasteiger,Naoaki Yabuuchi,Haruyuki Nakanishi,John B. Goodenough,Yang Shao-Horn +6 more
TL;DR: These findings reflect the critical influences of the σ orbital and metal-oxygen covalency on the competition between O(2)(2-)/OH(-) displacement and OH(-) regeneration on surface transition-metal ions as the rate-limiting steps of the ORR, and highlight the importance of electronic structure in controlling oxide catalytic activity.
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