A trimetallic V–Co–Fe oxide nanoparticle as an efficient and stable electrocatalyst for oxygen evolution reaction

Abstract

Electronic Supplementary Informa on (ESI) available: additional XRD spectra, polarization curves, Tafel plots and electrolyte resistance of catalysts prepared in this work, overall XPS spectra, nitrogen adsorption-desorption isotherm and EIS spectra of V-Co-Fe-343, List of relative parameters for oxygen evolution reaction. See Hydrogen (H2) generated from water splitting is deemed as the ideal replacement for conventional sources of energy. Catalysts play a valuable role in water splitting, especially the oxygen evolution reaction (OER). Here, we report a Fe-doped Co3V2O8 nanoparticle catalyst ( iron-rich V-Co-Fe), which possesses outstanding OER catalytic activity with ƞj = 10 mA cm -2 = 307 mV, and a low Tafel slope of 36 mV dec -1 , benefiting by large degree of amorphization, rich porous structure as well as high specific surface area (about 232.1 m 2 g -1 ). And, more remarkable, the catalytic performance of the V-Co-Fe catalyst is markedly superior to commercial ruthenium oxide. In addition, the durability of the V-Co-Fe catalyst is fine. The current density collapses by less than 3 percent at 1.55V vs. RHE after 11 h, in comparison with the initial value. Moreover, this work reveals that the V-Co-Fe catalyst displays an excellent performance in both OER catalytic activity and stability, which may have the potential to be the ideal substitute of noble metal-based catalysts for water splitting to obtain affordable clean energy.

Phosphorus and Fluorine Co‐Doping Induced Enhancement of Oxygen Evolution Reaction in Bimetallic Nitride Nanorods Arrays: Ionic Liquid‐Driven and Mechanism Clarification

“…[35] The other two peaks at 853.8 (2p 1/2 )a nd 871.0 eV (2p 1/2 )i ndicatet he metallic state of Ni 0 ,s uggesting that the oxidizeds tate of Ni 2 + was partially reduced under NH 3 atmosphere. [38][39][40][41] Moreover,t he peak at 779.6 eV can be ascribed to the metallic state of Co 0 . [38][39][40][41] Moreover,t he peak at 779.6 eV can be ascribed to the metallic state of Co 0 .…”

Vanadium Doped Nickel Phosphide Nanosheets Self‐Assembled Microspheres as a High‐Efficiency Oxygen Evolution Catalyst

“…For example, Xiao et al. studied a Fe‐doped Co 3 V 2 O 8 nanoparticle catalyst, which shows excellent catalytic activity and long‐term electrochemical stability for OER because of its abundant porous structures and large specific surface areas; Sun et al. reported a ternary NiFeV LDHs catalyst prepared by a hydrothermal method with outstanding catalytic activity for water oxidation, which can be ascribed to the tuned electronic structure induced by vanadium doping; and Qu et al.…”

One‐Step Electrodeposition of S‐Doped Cobalt–Nickel Layered Double Hydroxides on Conductive Substrates and their Electrocatalytic Activity in Alkaline Media

“…As shown in Figure B, by varying the pH from 13.23 to 14.34, the Tafel slope decreases from 283 to 128 mV dec −1 ; a low Tafel slope represents high kinetics for the OER [to conveniently compare with other catalysts reported at different testing conditions, all values of the potential were presented versus the reversible hydrogen electrode (RHE) by using the calibration equation: E RHE = E Hg/HgO vs. NHE +0.059 × pH]. Unfortunately, although the pH was higher at 14.34, the Tafel slope is still higher than the previously reported OER catalyst; the catalytic activity should be improved in latter studies.…”

“…Based on the above discussion, the exploration of novel non-noble-metal-based catalysts for the OER and MOR in alkaline media is akey challenge. [5] Transition-metal oxides are such ac lass of promising candidates for alkaline MOR and OER. Particularly, cobalt-and nickelbased compounds are the most widely investigated, because of their relativelyl ow cost and high activity,s uch as Ni nanoparticles, [6] Ni-doped Co 3 O 4 , [7] Ni-P-Oc ompounds, [5a] and NiCo 2 O 4 .…”