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引用次数: 0
摘要
电子自旋极化增强了析氧反应(OER)的动力学,这是一个限制水裂解能量效率的限速步骤。本文采用手性诱导自旋选择性(CISS)和外磁场(MH)诱导自旋极化相结合的双通道自旋调节策略,协同降低了尖晶石基铁磁材料的过电位,提高了材料的耐久性。在MH (CFO- l -m)作用下,手性分子修饰的CoFe2O4与未修饰的CFO相比,过电位降低了90 mV,这主要归功于协同的“1 + 1 >;由双自旋通道机制产生的2 "效应。理论计算表明,表面自旋态严重影响吸附质结合,自旋选择性和极化在第一个电子转移步骤中被激活,最终产生三重态O2。该研究阐明了自旋相关的OER动力学,为设计先进的自旋依赖电催化剂提供了基础。
Dual-Channel Regulation of Spin Polarization Achieves 1 + 1 > 2 Electrocatalytic Performance in Spinel Ferrites
Electron spin polarization enhances the kinetics of the oxygen evolution reaction (OER), a rate-limiting step that restricts the energy efficiency of water splitting. Here, a dual-channel spin-regulated strategy combining chiral-induced spin selectivity (CISS) and external magnetic field (MH)-induced spin polarization synergistically reduces the overpotential and enhances durability in spinel-based ferromagnetic materials. Chiral molecule-modified CoFe2O4 under MH (CFO-L-M) achieves a 90 mV reduction in overpotential compared to unmodified CFO, which is primarily ascribed to the synergistic “1 + 1 > 2” effect arising from the dual-spin channel mechanism. Theoretical calculations show that surface spin states critically influence adsorbate binding, with spin selectivity and polarization being activated during the first electron transfer step, ultimately producing triplet O2. This study elucidates spin-related OER kinetics, offering a foundation for designing advanced spin-dependent electrocatalysts.
期刊介绍:
Nano Letters serves as a dynamic platform for promptly disseminating original results in fundamental, applied, and emerging research across all facets of nanoscience and nanotechnology. A pivotal criterion for inclusion within Nano Letters is the convergence of at least two different areas or disciplines, ensuring a rich interdisciplinary scope. The journal is dedicated to fostering exploration in diverse areas, including:
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