CoNi2Se4 with a vacancy-ordered spinel structure shows excellent bifunctional electrocatalytic activity for water splitting in alkaline medium producing 10 mA cm−2 at a cell voltage of 1.61 V. For OER, an overpotential of 160 mV was needed for 10 mA cm−2 which is one of the lowest overpotentials reported to.

Mar 1, 2022 · Herein, we report the spin engineering of a nanocage-structured (Co,Ni)Se 2 /C@FeOOH, that showed significant oxygen evolution reaction (OER) activity.

Jan 31, 2019 · Herein, a hierarchical hollow (Co,Ni)Se 2 @NiFe layered double hydroxide (LDH) nanocage was synthesized by deriving from the metal–organic framework (MOF) of ZIF-67. Concretely, it involves first fabrication of hollow rhombic (Co,Ni)Se 2 nanocages and then deposition of NiFe LDH nanosheets on the surface of nanocages.

Mar 20, 2025 · Herein, hollow-structured CoNiSe 2 dual transition metal selenides wrapped in a carbon shell (HS-Co x Ni y Se 2 @C) were deliberately designed and prepared through sequential coating of polyacrylonitrile (PAN), ion exchange of ZIF-67 with Ni 2+ metal ions, and carbonization/selenization.

Jul 31, 2024 · Here, in this work, we report the formation of CoNi-LDH-derived CoNiSe 2 nanosheets via a simple hydrothermal technique subjected to water electrolysis in 1 M KOH. The CoNiSe 2 demands a lesser overpotential of 295 and 214 mV in alkaline conditions to reach the 50 mA cm –2 current density toward OER and HER, respectively.

Mar 1, 2019 · CoNiSe 2 nanorods are hierarchically decorated by LDHs toward interfacial synergy. CoNiSe 2 -LDHs interfaces afford remarkably promoted HER and overall water splitting. Synergic promotion on interfaces is theoretically and experimentally evidenced.

2 days ago · MOF-derived binary selenides (CoMo-Se, CoNi-Se and CoFe-Se) were synthesized via two-step approach and investigated as OER catalysts. CoMo-Se exhibited the best OER performance with η 10 of 268 mV and Tafel slope of 55.6 mV decade −1.

Feb 18, 2020 · The resulting nanospheres-like (CoNi)Se2/NC hierarchical structure exhibits a high specific capacity of 526.8 mA h g-1 at 0.2 A/g over 100 cycles, a stable cycle life with no obvious...

The resulting nanospheres-like (CoNi)Se 2 /NC hierarchical structure exhibits a high specific capacity of 526.8 mA h g −1 at 0.2 A/g over 100 cycles, a stable cycle life with no obvious capacities loss at 1.0 and 3.0 A/g after 500 cycles, and exceptional rate capability of 322.9 mA h …

Apr 1, 2023 · The (CoNi)Se 2 /NC composite exhibits an excellent reversible capacity of 526.8 mA h g −1 which still remains after 100 cycles at a small current density.