2020年5月20日 · We provide the first direct atomic-scale evidence that, under applied anodic potentials, MFe LDHs oxidize from as-prepared α-phases to activated γ-phases. The OER-active γ-phases are characterized...

The NiFe LDH modulated by sulfate achieves a remarkably low overpotential of 223 mV at 100 mA cm −2, which outperforms the commercial benchmark and ranks among the top of the alkaline OER catalysts to date. Moreover, the synergistic effects of carbonate and sulfate anions ensure long-term durability.

2013年5月23日 · Here, we report the synthesis of ultrathin nickel–iron layered double hydroxide (NiFe-LDH) nanoplates on mildly oxidized multiwalled carbon nanotubes (CNTs). Incorporation of Fe into the nickel hydroxide induced the formation of NiFe-LDH.

This study simultaneously performed chronopotentiometry for 672 h in a half-cell (200 mA cm −2) and 170 h in a single-cell (500 mA cm −2) to comprehensively evaluate the durability of a NiFe-LDH/NF electrode prepared via the hydrothermal deposition of a NiFe-layered double hydroxide (NiFe-LDH) on nickel felt (NF). The half-cell test results ...

2024年1月15日 · We synthesized NiFe LDH using a solvent ratio-adjusted hydrothermal method. The oxygen vacancies produced by alcoholysis promote the charge transfer rate. The interplanar distance was increased by inserting nitrate in NiFe LDH. WE 55 synthesized at a proper ratio of water and ethanol showed the best performance.

1 天前 · When evaluated in 1.0 M KOH solution, the optimized material of NC 20-Mn-NiFe LDH showed excellent OER performance requiring low overpotentials of 298 and 331 mV to achieve high current densities of 500 and 1000 mA cm –2, respectively, and no loss in current density was observed at fixed potentials of 1.53 and 1.57 V for 125 h in each case.

目前，可用于OER领域的最佳电催化剂之一，是通过 腐蚀工程 制备在泡沫铁上制备出的自支撑镍-铁层状双氢氧化物 (NiFe-LDH @IF)。 然而，由于对生长机理和腐蚀条件对电催化活性的影响缺乏了解，使得NiFe-LDH@IF的进一步发展受到阻碍。 图1. NiFe-LDH@IF的合成过程示意图。 文章要点1：在本文中，作者深入研究了生长机理，并首次揭示出优于溶解氧的还原，使得NiFe合金阴极附近的局部pH值较高，从而 NiFe-LDH会优先沉淀在NiFe合金阴极上形成NiFe-LDH@IF。 文 …

2025年3月21日 · In this study, a synergistic reconstruction approach is introduced to fabricate defect-enriched NiFe layered double hydroxide (d-NiFe LDH) with three-dimensional (3D) hierarchical structures. Through in situ synergistic reconstruction of molybdates and phytic acid ligands, rapid generation of d -NiFe LDH two-dimensional nanosheets on one ...

2024年9月26日 · 本文探究了工业碱性条件下NiFe-LDH的失稳机制，成功构筑了卟啉（TCPP）插层的NiFe-LDH，用于工业碱性条件下的电催化水氧化。 在10 M KOH中，NiFe-TCPP表现出优异的OER稳定性（1000 h@500 mA cm -2 ）和活性（290.2 mV@1000 mA cm -2 ）。

2 天之前 · The heterojunction interface in NixSy@NiFe LDH modifies the electron distribution, thus significantly lowering the Gibbs free energy of hydrogen adsorption (ΔGH* = 0.1 eV) compared to that of NixSy. Correspondingly, they exhibit superior bifunctional performance for HER and OER in alkaline solution, delivering high current densities of ...