Heterointerface engineering of trilayer-shelled ultrathin MoS₂/MoP/N-doped carbon hollow nanobubbles for efficient hydrogen evolution

Abstract

For efficient electrocatalysis, the rational construction of unique electrochemical interfaces is very important to enhance the intrinsic activity and expose more active sites.

MoS2 Quantum Dots Modified Black Ti3+–TiO2/g‐C3N4 Hollow Nanosphere Heterojunction toward Photocatalytic Hydrogen Production Enhancement

“…Figure c–e shows the HRTEM images of the B‐TiO 2 , g‐C 3 N 4 , and MoS 2 QD. As revealed, the lattice space of 0.351 nm corresponds to the (1 0 1) plane of the TiO 2 (Figure c), and the lattice spaces of 0.325 and 0.271 nm correspond to the (0 0 2) plane of the g‐C 3 N 4 (Figure d) and the (0 0 2) plane of the MoS 2 (Figure e), respectively. These results indicate that the MoS 2 QDs have been introduced into the B‐TiO 2 /g‐C 3 N 4 heterojunction.…”

“…Recently, molybdenum sulfide (MoS 2 ) is reported as a popular catalyst in HER, including the photocatalysis or electrocatalysis, because the crystal MoS 2 with sandwiched layers S–Mo–S can provide various unsaturated bonds at the edges, which can act as the activity sites to promote the interface transport of the photon‐generated electron and reduce the overpotential for improving the HER; For example, Li et al have prepared the edge‐rich MoS 2 for enhancing the hydrogen evolution . Compared with the bulk structure, the 0D MoS 2 quantum dots (QDs) have the unique band potential and exhibit more edge activity sites and are considered a more ideal modification .…”

Hierarchical Ultrathin Mo/MoS2(1−x−y)Px Nanosheets Assembled on P, N Co‐Doped Carbon Nanotubes for Hydrogen Evolution in Both Acidic and Alkaline Electrolytes

“…[33,36] Similarly, one peak located at binding energies of 239.4 eV for Mo 4+ , and 233.1/231.6 eV for Mo 4+ / Mo δ+ (0 < δ ≤ 4) can be assigned to MoS 2 and MoP, respectively. [33,36,37] The binding energy peak centered at 229.1 eV is indexed to Mo δ+ in the MoS 2 /MoP phase. [37,38] It is noted that the peak intensity for S 2p at 226.2 eV of Mo/MoS 1.15 P 0.30 @PNC becomes much weaker compared to that of S 2p in H-MoS 2 @NC, indicating that part of the S is replaced by P. With the increment of P contents (0→0.45) in Mo/MoS 2(1−x−y) P x @PNC, the binding energy of Mo 3d 5/2 also shifts to lower binding energy.…”

“…[33,36,37] The binding energy peak centered at 229.1 eV is indexed to Mo δ+ in the MoS 2 /MoP phase. [37,38] It is noted that the peak intensity for S 2p at 226.2 eV of Mo/MoS 1.15 P 0.30 @PNC becomes much weaker compared to that of S 2p in H-MoS 2 @NC, indicating that part of the S is replaced by P. With the increment of P contents (0→0.45) in Mo/MoS 2(1−x−y) P x @PNC, the binding energy of Mo 3d 5/2 also shifts to lower binding energy. Such down-shifts implies an increased electron density, which is beneficial for promoting the proton adsorption during HER.…”

Hydrogen Evolution and Wastewater Treatment of Hydrangeal‐like Catalyst Decroatedby the NiS Nanosheet and PdNanoparticle

“…For the past few years, the electroconductivity of the MoS 2 has been enhanced by addition of the metals as an efficient method . In particular, the use of the Pd metal could enhance photocatalytic activity .…”