Hierarchical MoN@NiFe‐LDH Heterostructure Nanowire Array for Highly Efficient Electrocatalytic Hydrogen Evolution

Abstract

The slow charge transfer and high energy barrier are the key restrictions of cost‐effective electrocatalysts for hydrogen production. A hierarchical heterostructure of MoN@NiFe‐layered double hydroxides (LDH) is developed, with NiFe‐LDH nanosheets supported on MoN nanowire arrays. The as‐prepared MoN@NiFe‐LDH exhibits a remarkably high performance on hydrogen production in alkaline medium, which is close to the benchmark Pt/C. The theoretical computations indicate that MoN@NiFe‐LDH has a metallic character inherited from MoN, which gives rise to the promoted charge transfer. Furthermore, the adsorption intensity of intermediates on MoN@NiFe‐LDH is optimized and thereby the energy barrier is diminished. This work demonstrates the significance of constructing heterostructure for boosting the charge transfer and reducing the energy barrier, which can shed light on the development of highly efficient and low‐cost electrocatalyst for hydrogen production.

In-Site Growth of Efficient NiFeOOH/NiFe-LDH Electrodes: A Streamlined One-Step Methodology

“…In TEM images (Figures 2e and S6), there are visible lattice stripes with the spacing of 0.224 nm, due to the (101) plane of (Fe 0.67 Ni 0.33 )OOH [28]. The lattice spacing of 0.260 nm is due to the (012) lattice plane of NiFe-LDH [29]. Selected area electron diffraction (SAED) patterns showing diffraction rings (Figure 2f) were also consistent with the above findings.…”

Ce-doping induces rapid electron transfer in a bimetallic phosphide heterostructure to achieve efficient hydrogen production

“…The high energy density of hydrogen has garnered significant attention. 1,2 Among the many ways to produce hydrogen, electrochemical water splitting transforms electricity into a pure chemical fuel, offering a viable and promising energy storage solution to future energy crises and the unpredictability of renewable energy sources. [3][4][5] The entire process of alkaline hydrogen evolution is severely hampered by the sluggish dissociation of H 2 O and H* adsorption.…”

Improving NiFe Electrocatalysts through Fluorination‐Driven Rearrangements for Neutral Water Electrolysis

“…[1][2][3][4][5][6] The hydrogen evolution reaction (HER) can be implemented in acidic, neutral, and alkaline environments. [7][8][9][10][11][12] It has been known that the acidic DOI: 10.1002/smll.202310642 HER shows better performance compared to the neutral/alkaline conditions, [13][14][15][16][17][18] while equipment and catalyst corrosion issues usually impede the scalable development in sustainable energy supplies. [19][20][21][22][23][24] Neutral environment provides a more accessible condition for catalysts to remain less corrosive environment; more importantly, neutral water splitting offers the chance of obtaining hydrogen production directly from seawater that does not need desalination, which makes neutral HER highly promising.…”