NiCo-sulfide hetero-structured interface induced highly active nickel-dominated metal sites for oxygen evolution reaction

Iron‐group Metal Compound Electrocatalysts for Efficient Hydrogen Production: Recent Advances and Future Prospects

“…Lai and Liang et al have designed CoS x , which has an overpotential of 341 eV at a current density of 100 mA cm À 2 and exhibits a lower overpotential than CoS x and RuO 2 in all the current densities. [38] Then they have prepared NiS/Co 3 S 4 with a heterogeneous structure by the coprecipitation method and hydrothermal method, the overpotential of the material was greatly reduced, and bilayer capacitance were increased(Figure 3eh). The result is mainly attributed to the construction of heterostructure interfaces, leading to the manifestation of synergies between bimetals, high valence of Ni-dominated metal sites expedites the surface reconstruction.…”

“…Lai and Liang et al. have designed CoS x , which has an overpotential of 341 eV at a current density of 100 mA cm −2 and exhibits a lower overpotential than CoS x and RuO 2 in all the current densities [38] . Then they have prepared NiS/Co 3 S 4 with a heterogeneous structure by the coprecipitation method and hydrothermal method, the overpotential of the material was greatly reduced, and bilayer capacitance were increased(Figure 3e–h).…”

A hybrid of MIL-53(Fe) rhombus and conductive CoNi2S4 nanosheets as a synergistic electrocatalyst for the oxygen evolution reaction

“…22 Transition metal sulfides are not only rich in reserves and good conductivity, but also display diverse structures and excellent OER activity, and are therefore of wide interest. 23,24…”

“…22 Transition metal sulfides are not only rich in reserves and good conductivity, but also display diverse structures and excellent OER activity, and are therefore of wide interest. 23,24 The transition metal sulfide CoNi 2 S 4 exhibits good chemical stability, low cost and simple synthesis methods, which is generally used to improve its electrical conductivity and OER activity by assembling with metal-organic skeletons or by combining with other activation building blocks. 25,26 Relative to the MOF material MIL-53 (Fe), the similarity is the low cost, easy synthesis, and stable performance, while the difference is that MOF materials are generally used as precursors for the controlled synthesis of MOF derivatives, or modification with active substances to increase the active sites for the OER.…”

Heterostructure NiCo-Alloy Nanosheet Embedded Ceria Nanorods: A Highly Efficient Bifunctional Electrocatalyst toward Oxygen Evolution Reaction and Oxygen Reduction Reaction

“…The catalyst exhibited remarkable electrocatalytic activity for the OER, with a low overpotential of 273 mV at 20 mA cm –2 . Along with transition metal oxides (mostly Ni and Co), alloys, phosphides, and sulfides have also been used extensively as electrocatalysts because of their low-cost and redox chemistry. Recently, heterogeneous transition metal alloy based electrode materials have been explored for the ORR and OER because of their high catalytic performance and corrosion resistance in alkaline conditions. , For instance, Ali et al synthesized NiCo alloy nanoparticles decorated over nitrogen-doped carbon spheres.…”