Facile solvothermal preparation of an organic hybrid dysprosium selenidoantimonate for an efficient oxygen evolution reaction

Abstract

This work offers the first example of the organic hybrid dysprosium chalcogenidoantimonate applied as an OER electrocatalyst.

Two Electrocatalytic Selenoarsenates with Manganese Complex Cations as Counterions

“…The enhanced OER activity of the 1/Ni/NF and 2/Ni/NF may be related to the synergistic effect of the active material (1 or 2) and Ni nanoparticle, and good electrical conductivity of 1 and 2 in comparison with RuO 2 , because the optical band gap of 1 (1.89 eV) and 2 (2.01 eV) is smaller than that of RuO 2 (2.2− 2.4 eV). 44 Moreover, the overpotential of the 1/Ni/NF and 2/ Ni/NF electrodes is also compared with other metal chalcogenides as excellent OER electrocatalysts in alkaline electrolytes, such as Ni/SbSe-1@AB/NF (η 10 = 269 mV, SbSe-1 = [Dy(teta) 2 ][SbSe 4 ], AB = acetylene black), 45 Ni 3 S 2 /MnS/ NF (η 10 = 279 mV), 46 Co 9 S 8 −CuS-FeS (η 10 = 300 mV), 47 and NiCo 2 S 4 (nanowire)/GDF (η 10 = 308 mV, GDF = graphdiyne foam), 48 (R ct = 6.2 Ω), Ni/NF (R ct = 11.9 Ω), and NF (R ct = 17.0 Ω) (Figure 7c). The smaller R ct values of 1/Ni/NF and 2/Ni/NF imply faster charge transfer kinetics, which are in agreement with their lower overpotential and smaller Tafel slope.…”