In situ grown, self-supported iron–cobalt–nickel alloy amorphous oxide nanosheets with low overpotential toward water oxidation

Abstract

Electrocatalytic water oxidation by in situ grown iron-cobalt-nickel ternary alloy amorphous oxides is reported. This catalytic material was prepared by simple anodization of an alloy plate followed by low-temperature annealing, which shows superior electrocatalytic activity toward oxygen evolution reaction with an overpotential of only 170 mV and a low Tafel slope.

A free standing porous Co/Mo architecture as a robust bifunctional catalyst toward water splitting

“…The former corroborates the existence of Mo VI -O, 10 and the latter indicates the presence of a great number of defect sites with low oxygen coordination on the surface of the etched Co/Mo; such sites have been reported to be favourable for high catalytic activity. [15][16][17][18] The Mo 3d spectrum (Fig. 2d) shows a characteristic doublet of Mo VI at 232.1 eV (Mo 3d 5/2 ) and 235.4 eV (Mo 3d 3/2 ), 6,19 indicating that the surface Mo was also oxidized by CAN.…”

FeCoNi Alloy as Noble Metal‐Free Electrocatalyst for Oxygen Evolution Reaction (OER)

“…The faster electron transfer is due to the synergistic effect from the multiple transition metals, as well as other factors. It is well consistent with earlier results …”

Electrocatalytic water oxidation at amorphous trimetallic oxides based on FeCoNiOx

“…Interestingly, there has been a shi from utilising crystalline catalysts to producing amorphous materials for water splitting. 22,[25][26][27] A recent study has shown that a photochemical metal-organic deposition process can produce amorphous mixed metal oxides displaying activity for the OER. 22 Crystallinity or lack thereof is therefore expected to be a critical factor in determining the activity of the catalyst as evidence is now emerging that a reversible crystalline to amorphous transition can occur during the OER, as reported for Co 3 O 4 .…”