Co, Mn co-doped Fe₉S₁₁@Ni₉S₈ supported on nickel foam as a high efficiency electrocatalyst for the oxygen evolution reaction and urea oxidation reaction

Abstract

The earth's fossil resources are exhausted, so it is urgent to find clean and efficient new energy for replacing fossil resources. Hydrogen energy is gradually known by the public and...

Controlled synthesis of Crx–FeCo2P nanoarrays on nickel foam for overall urea splitting

“…6c, the Tafel slope of Cr 0.1 –FeCo 2 P/NF is 112.52 mV dec −1 , which is smaller than those of Cr 0.15 –FeCo 2 P/NF (175.33 mV dec −1 ), FeCo 2 P/NF (141.99 mV dec −1 ), and Cr 0.2 –FeCo 2 P/NF (207.42 mV dec −1 ), indicating that the Cr 0.1 –FeCo 2 P/NF catalyst has a Volmer–Tafel mechanism with good kinetics, thus exhibiting excellent electrocatalytic activity. 46 The EIS test of the Cr x –FeCo 2 P/NF material is shown in Fig. 6d, in which the impedance of the Cr 0.1 –FeCo 2 P/NF catalyst is found to be the smallest after fitting through the equivalent circuit diagram, indicating the fastest internal charge transfer rate during the HER and the excellent metallicity and conductivity of the Cr 0.1 –FeCo 2 P/NF material.…”

Dual doping: An emerging strategy to construct efficient metal catalysts for water electrolysis

“…[93][94][95][96] For increasing the active sites and boosting the intrinsic activity of metal chalcogenides, dual cation doping is adopted to alter the electronic structure of catalysts and introduce active sites. Cu/Co co-doped Ni 3 S 2 , 69 Cu/Fe co-doped Ni 3 S 4 , 97 Fe/Mn co-doped Ni 3 S 2 , 70 Co/V co-doped NiS x , 98 Fe/V co-doped Ni 3 S 2 , 99,100 Fe/Co dual-doped Ni 3 S 4 , 101 Co/Mn co-doped Fe 9 S 11 @Ni 9 S 8 , 102 Fe/Co co-doped Ni 3 Se 4 , 103 and Ni/Fe co-doped CoSe 2 , 104 which insert two transition metals into metal chalcogenides are representative of efficient catalysts for water electrolysis. In these catalysts, the 29 Copyright 2020, Elsevier.…”

Three-dimensional nickel nanowires modified by amorphous Fe nanosheets as electrocatalysts for the oxygen evolution reaction

“…However, compared to PGMs, nickel has low catalytic activity and a higher OER overpotential. [13][14][15] Bimetallic nickel-based OER catalysts, such as NiCo, 16 NiMo, 17 NiMn, 18 and NiFe, 19 demonstrated better electrochemical performance than their single-metal counterparts. 20,21 Among those, NiFe catalysts are the most promising for large-scale application in water electrolysis due to their high activity and stability under OER conditions.…”