A smart strategy of “laser-direct-writing” to achieve scalable fabrication of self-supported MoNi₄/Ni catalysts for efficient and durable hydrogen evolution reaction

Abstract

Water electrolysis is the major prerequisite to realizing future global carbon neutrality, and large-scale production of efficient and economic electrocatalysts is essential for industrial hydrogen production. Herein, MoNi4 catalysts were...

A facile strategy of “laser-direct-writing” to develop self-supported Ni30B70–Ti catalysts for boosted and durable alkaline oxygen evolution

“…In this study, a mixture of nickel and boron powders was brush-coated on titanium foam, and localized photo-thermal chemical reactions occurred once the laser beam was employed on its surface. 37 A laser was used to rapidly induce heating, melting, and cooling in the fusion zone, forming a fused layer with a distinct chemical composition on a specific substrate. High laser energy enables a strong metallurgical bond between the NiB catalyst coating and Ti substrate, ensuring long-term electrode durability.…”

Self-Supported Fe-Doped MoNi4 Alloy Nanosheet Array as a Trifunctional Electrocatalyst for Water and Urea Splitting

“…For example, Ding et al successfully synthesized a N-doped C-coupled FeNi 3 alloy compound electrocatalyst with superior OER performance in alkaline conditions . Recently, numerous advanced researches have demonstrated that Mo–Ni-based alloy catalysts possess superior HER activity among nonprecious transition-metal materials. , As an illustration, Chen et al reported that the synthesized MoNi 4 /MoO 3– x catalyst displays remarkable HER properties with an ultrasmall overpotential of 17 mV to reach 10 mA cm –2 and superb stability . This is attributed to the collaborative electronic interaction of Ni and Mo; thereby, the appropriate hydrogen adsorption energy is generated on the electrocatalyst surface.…”

Alloying‐Triggered Phase Engineering of NiFe System via Laser‐Assisted Al Incorporation for Full Water Splitting

“…During the cladding process, the alloying elements react with each other to produce new compounds in situ, and the coating and the substrate material form a metallurgical bond through the interfacial diffusion of atoms, thus improving the wear resistance, corrosion resistance, heat resistance and oxidation resistance of the substrate material surface. Our previous results indicated that a MoNi 4 catalyst anchored on a nickel foam (NF) matrix could be obtained by engineering morphology and chemical component via the laser‐direct‐writing method, presenting high HER performance with low overpotential (η 10 =43 mV) and excellent stability [16] . At present, more and more catalysts on NF have been reported that can withstand a long period of time at a high current density [17] .…”

“…Our previous results indicated that a MoNi 4 catalyst anchored on a nickel foam (NF) matrix could be obtained by engineering morphology and chemical component via the laser-directwriting method, presenting high HER performance with low overpotential (η 10 = 43 mV) and excellent stability. [16] At present, more and more catalysts on NF have been reported that can withstand a long period of time at a high current density. [17] Therefore, binding the catalyst to the NF by laser to form a self-supporting structure can increase the electrical conductivity and improve its stability.…”