A Trimetallic Cobalt/Iron/Nickel Phytate Catalyst for Overall Water Splitting: Fabrication by Magnetic‐Field‐Assisted Bipolar Electrodeposition

Abstract

Electrodeposition is an effective method to prepare various materials. We have established a bipolar electrodeposition system assisted by a constant magnetic field to fabricate a Co/ Fe/Ni phytate catalyst with good electrocatalytic activity for overall water splitting. The effects of magnetic and electric fields on the catalytic properties of the material were studied. The catalyst prepared with an N-pole magnetic field (NPMF) exhibited good overall water splitting performance. Benefiting from the synergistic effect of the Co/Fe/Ni-phytate and the advantages of the N-pole magnetic field the NPMF electrode has a continuous 25 hours high-efficiency hydrogen evolution and oxygen evolution reaction at a current density of 100 mA cm À 2 in1.0 M KOH compared with commercial RuO 2 and Pt/C. Bipolar electrodeposition with a constant magnetic field is thus an efficient means to fabricate electrocatalytic water splitting catalysts.

Recent advances in catalyst design and activity enhancement induced by a magnetic field for electrocatalysis

“…Additionally, since magnetization force (FM) and Lorentz force (FL) change the macro/microstructure of the material, magnetic fields can also assist electrodeposition. 25…”

Phytate Coordination-Enhanced Electrocatalytic Activity of Copper for Nitroarene Hydrogenation through Concerted Proton-Coupled Electron Transfer

“…26 In contrast, the surface of the CF-PA electrode was dominated by Cu(II) species (934.9 eV); this can be ascribed to the charge transfer from Cu to PA, owing to the coordination of the latter with the interfacial Cu. The XPS P 2p profile of PA-CF showed a peak at 133.4 eV, ascribed to the bond of phosphate groups, 27 further reflecting the coordination of PA on the CF surface. Two apparent peaks at 288.4 and 286.1 eV were found on the XPS C 1s profile of PA-CF (Figure S3), which was in line with the respective C−O and C−C bonds in PA, 28,29 again confirming the successful PA coordination on CF.…”

Magnetic Field-Assisted Electrodeposition of Fe3O4 Nanoparticles on Ni as Bifunctional Electrocatalyst for Overall Water Splitting

“…In a recent work, a constant magnetic field-assisted electrodeposition device has been built. Co/Fe/Ni-phytate catalysts have been deposited via magnetic field-assisted deposition, which shows superior electrolytic water efficiency in the alkaline medium . Ni­(OH) 2 @CoB nanostrands were synthesized as OER catalysts with abundant active sites with the assistance of a magnetic field .…”

“…Co/Fe/Ni-phytate catalysts have been deposited via magnetic field-assisted deposition, which shows superior electrolytic water efficiency in the alkaline medium. 36 Ni(OH) 2 @CoB nanostrands were synthesized as OER catalysts with abundant active sites with the assistance of a magnetic field. 37 A straightforward technique utilizing magnetic fields was employed to produce Ni nanocrystalline nuclei through an in situ growth process.…”