Unique three-dimensional heterostructure of MoS2@Co-MOF decorated with Co-Al layered double hydroxide: An effective synergistic alkaline hydrogen evolution electrocatalyst

One-Step Electrodeposition of a Mesoporous Ni/Co-Imidazole-Based Bimetal-Organic Framework on Pyramid-like NiSb with Abundant Coupling Interfaces as an Ultra-Stable Heterostructural Electrocatalyst for Water Splitting

“…The long-term stability of the as-synthesized electrodes was checked through a chronopotentiometry at a current density of 100 mA cm –2 and multistep chronopotentiometry from 10 to 100 mA cm –2 for HER and OER performances. The electrical double-layer capacitance ( C dl ) was calculated by taking the cyclic voltammetry (CV) test at different sweep rates (10–100 mV s –1 ) to estimate the electrochemically active area (ECSA). , To gain insight into the cathodic electrodeposition mechanism of crystalline MOFs, a CV test was performed at a sweeping potential between −2.0 and 1.0 V (vs Ag/AgCl).…”

“…The electrical double-layer capacitance (C dl ) was calculated by taking the cyclic voltammetry (CV) test at different sweep rates (10−100 mV s −1 ) to estimate the electrochemically active area (ECSA). 9,17 To gain insight into the cathodic electrodeposition mechanism of crystalline MOFs, a CV test was performed at a sweeping potential between −2.0 and 1.0 V (vs Ag/AgCl). The Nernst equation (E RHE = E Ag/AgCl + 0.198 V + 0.059 pH) was used to transform the obtained potential to that of the reversible hydrogen electrode (RHE).…”

“…Among many MOF materials, the Co-MOFs formed by cobalt ions and 2-methylimidazole have good thermal and chemical stability as well as a good tip effect . To provide the potential of enhanced activities and stability in MOFs, linking two transition metals with organic ligands to generate bimetallic MOF is a common strategy .…”

“…16 Among many MOF materials, the Co-MOFs formed by cobalt ions and 2-methylimidazole have good thermal and chemical stability as well as a good tip effect. 17 To provide the potential of enhanced activities and stability in MOFs, linking two transition metals with organic ligands to generate bimetallic MOF is a common strategy. 18 The improvement of electrocatalytic performance by the bimetallic-based MOF catalysts can be assigned to a synergistic effect between the two types of metal species to achieve a high density of active sites.…”

Construction and optimization of multi-interface nanotube structured phosphorus-doped bimetallic oxide arrays as efficient electrocatalysts for water splitting

“…During the HER process, the surface polarization of the P atoms result in a partially negative charge at its center, which promotes the adsorption and discharge of protons and the HER activity of the catalysts. 53,54 In addition, the controllable mesoporous material Co MOFs (ZIF-67) exhibit a pointed conical rod-shaped structure, 14,38 which increases the surface area of the catalyst. Nitrogen-rich ZIF-67 provide more efficient electron transfer channels and are more favorable for electron transfer due to its large specific surface area.…”