Motivating high-valence Nb doping by fast molten salt method for NiFe hydroxides toward efficient oxygen evolution reaction

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

“…5c shows that two peaks located at 723.7 and 712.4 eV are attribu- ted to Fe 2p 1/2 and Fe 2p 3/2 , and the valence is +3, while Fe 3+ is responsible for the production of a higher Ni state. 46 The fitting data of Ni 2p in Fig. 5d illustrate that the peaks at 874.3 and 856.5 eV are formed after stability tests, which should be due to the generation of more active Ni 3+ in the NiOOH species.…”

“…After introducing NiFe-LDH, the binding energy of S 2p increases around 0.6 eV, suggesting that the chemical environment of sulfur ions has been greatly modified, similar to an earlier report. 45,46 Moreover, the O 1s spectrum in Fig. 2d exhibits three different peaks at 530.9, 531.6, and 532.3 eV, which can be attributed to metal-oxygen bonds, metal-hydroxyl binding (Ni-OH and Fe-OH) and oxygen vacancies, respectively.…”

“…Alkaline water electrolysis is regarded as a promising strategy for large-scale hydrogen production to solve the current energy crisis. [1][2][3] However, alkaline water electrolyzers are not realized for industrial applications due to their low efficiency and high cost. At present, although many electrocatalysts have been developed to reduce the overpotentials of the reaction and accelerate the hydrogen production reaction, most of them only perform well under laboratory conditions and cannot endure the stringent industrial operating conditions.…”

Niobium‐Incorporated CoSe2 Nanothorns with Electronic Structural Alterations for Efficient Alkaline Oxygen Evolution Reaction at High Current Density

“…[10] Furthermore, Nb-doped layered FeNi phosphide with high conductivity and abundant active sites displayed an excellent OER activity. [11] Special attention has been paid to Nb since it has multi chemical valences ranging from + 1 to + 5 [12] and exhibits a unique physicochemical nature, high hardness and melting point, and good electrochemical performance. [13] The Nb improves the catalytic performance from two aspects.…”

Triple captured iron by defect abundant NiO for efficient water oxidation

“…[1][2][3][4][5] Therefore, it is imperative to design advanced electrocatalysts to reduce the required OER overpotential to promote hydrogen production. In recent years, many non-noble metal catalysts represented by Fe, [6][7][8] Co, [9][10][11] and Ni [12][13][14][15] with an appropriate d-electron configuration have been all the rage due to their low cost and high reserves. Nevertheless, more research and optimization are pivotal to improve the OER activity and stability in order to realize the large-scale commercial application.…”