Green synthesis of CuCo2O4–CuO composite nanoparticles grown on nickel foam for high-performance oxygen evolution reaction

A new layered barium cobaltite electrode for protonic ceramic cells

“…3a depicts the high-resolution spectrum of the Co 2p 3/2 region, which was fitted to accommodate two main components: Co 3+ (779.619 eV) and Co 2+ (781.135 eV), in agreement with previous works. 40,41 The presence of a Co 3+ /Co 2+ ratio higher than unity (1.842) at the surface is in line with the average BVS estimated from Rietveld refinement for the bulk (Table 1), in which a higher oxidation state of Co was also found.…”

Synthesis strategies of smart 3D nanoarchitectures and their applications in energy storage and conversion

“…Typically, high pressure hydrothermal synthesis is carried out at temperatures over the boiling point of water. By annealing in an air atmosphere, MnCo 2 O 4 has eventually been produced 41 …”

“…At a current density of 25 mA cm −2 , this electrode exhibited a 296 mV overpotential, and a Tafel slope of 82 mV dec −1 with 15 h of exceptional electrochemical stability. The following Equation (1) is an expression for the reaction synthesis 41 : …”

“…By annealing in an air atmosphere, MnCo 2 O 4 has eventually been produced. 41 Yue et al have effectively created 3D TiO 2 /reduced graphene oxide (TiO 2 /RGO) composites mesoporous nanocube utilizing a straightforward hydrothermal technique. The synthetic composite contained rutile and anatase crystalline phases.…”

In situ construction of heterostructured CuxO@NiCoS nanoarrays for alkaline overall water splitting

“…33 Silva et al prepared CuCo 2 O 4 –CuO composite nanoparticles on nickel foam, which exhibited robust activity towards the OER with a small overpotential of 289 mV at a current density of 10 mA cm −2 . 34 In the process of electrode preparation, polymeric binders are often used to fix the electrocatalyst on the conductive substrates to prevent the catalyst material from falling off. However, using a binder will cover the active sites of the electrocatalyst and thus affect the electrocatalytic performance.…”