NiSe₂/FeSe₂ heterostructured nanoparticles supported on rGO for efficient water electrolysis

Abstract

To develop a cost-effective and highly abundant catalyst for overall water splitting is highly desirable. Herein, we report a feasible approach to fabricate a catalyst based on phase-separated heterointerfaces in...

In situphosphoselenization induced heterointerface engineering endow NiSe2/Ni2P/FeSe2hollow nanocages with efficient water oxidation electrocatalysis performance

“…S12 † reveals that the NiFePSe nanocages possess the highest ECSA with respect to the other catalysts, which may be ascribed to the hollow and porous structure as well as the multicomponent interface with quicker mass transport. More significantly, compared to other reported OER electrocatalysts, NiFePSe still presented the best OER activity 3,4,12,24,41,[44][45][46][47][48] (Fig. 3e).…”

MXene Nanosheets Induce Efficient Iron Selenide Active Sites to Boost the Electrocatalytic Hydrogen Evolution Reaction

“…Over the past decade, the binary selenide compounds ( e.g ., FeSe 2 , MoSe 2 , WSe 2 , etc. ) display unique structures of the center metal atoms octahedrally bonded with adjacent selenium atoms, which are considered promising alternatives to Pt-based electrocatalysts owing to their affordable price and good electrocatalytic effects. − In particular, FeSe 2 nanocrystals with high natural abundance commonly exhibit a series of textural advantages, including thermodynamic stability, environmental friendliness, stable configuration, and superior electrocatalytic properties, all of which are highly desirable for the HER. − However, the bare FeSe 2 with low electrical conductivity lacks sufficient reactive centers due to the inherent stacking arising from the high surface energy, which are unable to make full use of electrochemical activity and eventuates in a poor conductivity of the catalytic system. , …”

“…30−32 However, the bare FeSe 2 with low electrical conductivity lacks sufficient reactive centers due to the inherent stacking arising from the high surface energy, which are unable to make full use of electrochemical activity and eventuates in a poor conductivity of the catalytic system. 33,34 For the sake of restraining the large agglomerates and ameliorating the electrical conductivity of the FeSe 2 nanocrystals, one valid means is to optimize the surface electron interactions and ameliorate the application efficiency of edge reactive sites by loading them onto a befitting matrix with a large surface area and a high charge-transfer rate. 35,36 In this aspect, two-dimensional (2D) Ti 3 C 2 T x MXene nanosheets have displayed unique catalytic functions ascribed to the superthin nature, metallic electron-transport behavior, good hydrophilicity, and copious surface chemistries.…”

Heterometal doping on nickel selenide corrugations for solar-assisted electrocatalytic hydrogen evolution

“…4 Electrocatalytic water splitting can be used to produce high-purity hydrogen in an environmentally friendly way, so it would be an ideal alternative to fossil-fuel hydrogenproduction technology if its cost could be reduced. 5,6 In order to reduce the cost of hydrogen production by electrocatalytic water splitting, the most effective method is to search for active and inexpensive electrocatalysts that can replace the precious Pt and Pt-based materials and reduce the overpotential required during water splitting. [7][8][9] Therefore, tremendous efforts have been expended in this search, leading to great progress in finding highly active and earth-abundant hydrogen evolution reaction (HER) electrocatalysts, 10,11 including transition metal dichalcogenides, 12,13 metal phosphides, 14,15 and metal carbides.…”

“…4 Electrocatalytic water splitting can be used to produce high-purity hydrogen in an environmentally friendly way, so it would be an ideal alternative to fossil-fuel hydrogen-production technology if its cost could be reduced. 5,6…”