Hierarchical Co and Nb dual-doped MoS2 nanosheets shelled micro-TiO2 hollow spheres as effective multifunctional electrocatalysts for HER, OER, and ORR

Synergistic Regulation of S-Vacancy of MoS2-Based Materials for Highly Efficient Electrocatalytic Hydrogen Evolution

“…From these figures, it can be observed that lots of nanosheets are grown on the smooth surface of CC ( Supplementary Figure S2 ). Powder X-ray diffraction (XRD) pattern of Ru-MoS 2-x -CoS 2 /CC ( Figure 2A ) shows the diffraction peaks located at 2 θ = 14.1°, 32.7°, and 58.8°, matching well with the (002), (100), and (110) planes of 2H-MoS 2 (PDF#75-1539) ( Nguyen et al, 2021 ), respectively. Other sharp diffraction peaks of Ru-MoS 2-x -CoS 2 /CC, such as 32.4° and 55.1°, are attributed to the (200) and 311) planes of CoS 2 (PDF#70-2865) ( Yao et al, 2019 ), respectively, suggesting the presence of highly crystallized CoS 2 besides 2H-MoS 2 .…”

Porous graphene-like MoS2/carbon hierarchies for high-performance pseudocapacitive sodium storage

“…49 In contrast, the Mo 3d and S 2s peaks shift to higher binding energy with Δ E 1 = 0.2 eV and Δ E 3 = 0.3 eV, while two new peaks at 236.1 eV and 233.0 eV emerge, corresponding to Mo 6+ 3d 3/2 and Mo 6+ 3d 5/2 , which can be ascribed to the surface oxidation of few-layered MoS 2 . 50 To further confirm the chemical states of the surface component, XPS measurement after argon ion etching was performed (Fig. S7c†), and the intensity of Mo 6+ 3d is weakened compared to Mo 4+ 3d, further suggesting the surface oxidation.…”

Electron Density Modulation of MoO2/Ni to Produce Superior Hydrogen Evolution and Oxidation Activities

“…Apart from that, only a small overpotential of 50.48 mV is required for MoO 2 /Ni@NF to obtain a current density of 10 mA cm –2 , which is far superior to those of HER electrocatalysts reported recently (Table S2). ,− …”