Amorphous–crystalline FeNi₂S₄@NiFe–LDH nanograsses with molten salt as an industrially promising electrocatalyst for oxygen evolution

Abstract

Inexpensive and accessible NiFe-based oxygen evolution reaction (OER) electrocatalyst are limited for practical industrial applications by its activity and stability under industrial conditions. Herein, FeNi2S4@NiFe-LDH heterostructure is constructed by molten...

Research Advances in Amorphous‐Crystalline Heterostructures Toward Efficient Electrochemical Applications

“…As expected, the a/c-RuO 2 shows low OER overpotentials of 205 mV at 10 mAcm −2 and ultralong electrocatalytic stability of 60 h without obvious overpotential increase (Figure 5i), which is superior to benchmark RuO 2 and most reported OER electrocatalysts so far. [152] Moreover, inspired by the outstanding electrocatalytic ability of amorphous-crystalline heterostructures for OER, other analogous nanomaterials, such as (WO 2 -Na x WO 3 )@FeOOH/NF, [103] FeNi 2 S 4 @NiFe-LDH [105] and c-CoMP/a-CoM LDH/NF [106] et al, have also been accordingly developed and applied for substantially accelerate the commercialization process of electrochemical water splitting. The previously reported researches about amorphous-crystalline heterostructures for OER were further summarized in Table 2.…”

“…[ 142–144 ] Among various kinds of nanomaterials, the amorphous‐crystalline heterostructures are favorably studied in recent years as advanced OER electrocatalysts for performance improvement. [ 74–75,105,110–111,118,145–146 ] Xu et al. designed the novel ultrathin Ni‐ZIF/Ni‐B nanosheets amorphous‐crystalline heterostructure and demonstrated decreased overpotential of 234 mV for OER.…”

“…Typically, a fundamental building block is firstly prepared by the selected method and employed as substrate at next step for the other component growth via the same or different method. [104][105][106] Crucially, one of the methods in multistep strategy should be especially designed to achieve the amorphous component, such as the hydrothermal/solvothermal reaction, [107][108][109] electrodeposition method, [110][111] chemical etching method [112][113][114] and partial sulfuration [115] or boronization, [116][117] methods, etc.…”

“…[142][143][144] Among various kinds of nanomaterials, the amorphous-crystalline heterostructures are favorably studied in recent years as advanced OER electrocatalysts for performance improvement. [74][75]105,[110][111]118,[145][146] Xu et al designed the novel ultrathin Ni-ZIF/Ni-B nanosheets amorphous-crystalline heterostructure and demonstrated decreased overpotential of 234 mV for OER. [117] Ma et al successfully tailored the crystal structure of IrO x via introducing lanthanides to create amorphous-crystalline hetero-phase interfaces.…”

High-efficiency overall alkaline seawater splitting: using a nickel–iron sulfide nanosheet array as a bifunctional electrocatalyst

“…1b) shows diffraction peaks characteristic of a FeNi 2 S 4 crystal phase (JCPDS no. 47-1740) 40 and a metallic Ni substrate (JCPDS no. 04-0850), which indicated the successful conversion of NiFe-LDH/NF to NiFeS/NF.…”