Facile sol-gel synthesis of C@MoSe2 core-shell composites as advanced hydrogen evolution reaction catalyst

Recent advances in Mo-based electrocatalysts toward the hydrogen evolution reaction and the hydrogen oxidation reaction

“…As an illustration, Ren and co-workers have prepared C@MoSe 2 core–shell composite electrocatalysts through a simple sol–gel method. 75 As expected, C@MoSe 2 core–shell composites had a loose and scattered structure. And the obtained C@MoSe 2 core–shell composite electrocatalysts showed high activity toward the HER with a low overpotential and a small Tafel value of 72 mV dec −1 .…”

Confined synthesis of edge-rich V-doped MoSe2 nanosheets on carbon black for advanced hydrogen evolution reaction

“…It is reported that the charge transfer resistance can be greatly reduced by elemental doping and incorporating the catalysts with high conductivity carbon materials. [27][28][29] Therefore, the enhanced conductivity of V-MoSe 2 /CB can be attributed to the V doping effect and the electrical coupling effect between MoSe 2 and CB. Double-layer capacity (C dl ) was also employed to evaluate the electrochemical active surface area of the four samples by CV tests, which is estimated by plotting the current density variation at 0.15 V vs. RHE versus the scan rate region of 20-100 mV s À1 (Fig.…”

“…19,20 Despite the numerous advantages of MoSe 2 , the actual catalytic performance is restricted by its poor conductivity and unsatisfactory structural stacking with only the edge-site being active for the HER. 21 Therefore, a number of approaches have been adopted to enhance the HER performance of MoSe 2 and many achievements have been made in recent years, including heteroatom doping, 22 morphology and structure engineering, 23 phase structural engineering, 24 defect engineering, 25 and heterojunction engineering, 26 combined with a conductive substrate (e.g., carbon nanospheres, 27 carbon nanotubes, 28 graphene 29 ). These strategies aim to increase the number of catalytic active sites, optimize the electronic properties and increase conductivity, thus improving the hydrogen evolution performance to a certain extent.…”

Review on 2D Molybdenum Diselenide (MoSe2) and Its Hybrids for Green Hydrogen (H2) Generation Applications

“…Similarly, a hybrid with an enhanced morphological structure was obtained by combining MoSe 2 with graphene oxide, which aided the electrocatalytic kinetics at the interface and also lowered the electron transfer resistance . The core–shell C@MoSe 2 hybrid with a conductive carbon core prevented agglomeration and restacking of MoSe 2 nanosheets and reduced the charge transfer resistance by providing electrical contact between the MoSe 2 shells . Even though these support materials might not actively take part in the electrolysis, conductive supports greatly amend the HER performance of MoSe 2 by ameliorating the surface morphology, nanosheet distribution, agglomeration, and electrical conductivity.…”