Interfacial Structural and Electronic Regulation of MoS<sub>2</sub> for Promoting Its Kinetics and Activity of Alkaline Hydrogen Evolution

Feng, Jizheng; Zhao, Ziqi; Tang, Ranxiao; Zhao, Yangyang; Meng, Tao

doi:10.1021/acsami.1c17031

Cited by 19 publications

(11 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure e displays the characteristic peaks of Mo 3d of p-MoS 2 /NiS 2 , in which the ratio of peak areas is 2:1 between 1T-MoS 2 and 2H-MoS 2 . Figure d also shows two forms of S 2p, which are identical to the S 2p spectra of p-MoS 2 /NiS 2 . These results indicate the satisfactory stability of p-MoS 2 /NiS 2 .…”

Section: Resultssupporting

confidence: 65%

See 1 more Smart Citation

Polysulfide-Induced Synthesis of Coral-Like MoS₂/NiS₂ Nanostructures for Overall Water Splitting

et al. 2023

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

The development of multifunctional electrocatalysts with rich resources, excellent performance, and stability is necessary for water splitting to achieve sustainable hydrogen and oxygen production. Herein, we report the preparation of a bifunctional coral-like nanostructured electrocatalyst (p-MoS2/NiS2) by in situ vulcanization of polymeric sulfur with a MoO3/Ni as the precursor. It is exciting that the whole preparation process of the electrocatalyst can be completed in a few hours. The as-fabricated multimetallic sulfide not only exhibits well-defined heterointerfaces and the defect-rich two-dimensional (2D) nanoconfiguration with high conductivity to overcome the poor hydrogen evolution reaction (HER) activity, but also promotes the formation of the 1T phase. The obtained p-MoS2/NiS2 nanostructures exhibit low overpotentials of −115 mV at −10 mA cm–2 and 337 mV at 100 mA cm–2 toward the HER and oxygen evolution reaction (OER), respectively, which surpass most of the previously reported bimetallic sulfide-based electrocatalysts. Benefiting from the stability of the hierarchical heterostructure and the coupling effect between the inner layer of NiS2 and outer layers of MoS2, the p-MoS2/NiS2 catalyst is endowed with high activity for water splitting. It can be used as a bifunctional electrocatalyst for water splitting with a cell voltage of 1.51 V at a current density of 10 mA cm–2. Overall, this work proposes a simple in situ vulcanization method to synthesize MoS2, which expands the interlayer spacing and realizes the coexistence of a metastable structure and metal doping.

show abstract

Section: Resultssupporting

confidence: 65%

“…Figure 8d also shows two forms of S 2p, which are identical to the S 2p spectra of p-MoS 2 /NiS 2 . 41 These results indicate the satisfactory stability of p-MoS 2 /NiS 2 .…”

Section: Resultsmentioning

confidence: 68%

Polysulfide-Induced Synthesis of Coral-Like MoS₂/NiS₂ Nanostructures for Overall Water Splitting

et al. 2023

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

show abstract

“…However, it does not influence the HER performance visibly due to the unchanged LSV in the preelectrolysis and postelectrolysis samples (Figure S18). Structural reorganization during catalysis is very common for MoS 2 and has been extensively reported in the literature. − HAADF-STEM and EELS results of postelectrolysis Cu ads @MoS 2 and Cu sub @MoS 2 implied that Cu showed atomic dispersion with intervalence feature (Figures S19 and S20). Overall, the HER activities of Cu ads @MoS 2 and Cu sub @MoS 2 are comparable to state-of-the-art SA-modified MoS 2 catalysts (Table S10).…”

Section: Resultsmentioning

confidence: 82%

Manipulating Coordination Structures of Mixed-Valence Copper Single Atoms on 1T-MoS₂ for Efficient Hydrogen Evolution

Yan

et al. 2022

ACS Catal.

View full text Add to dashboard Cite

Directing single atoms (SAs) to occupy specific lattice sites in support materials and correlating the resulting changes in atomic coordination structures to catalytic activity are crucial for the rational design of high-performance single-atom catalysts (SACs). Herein, for the same copper (Cu) SAs, two coordination structures on 1T-phase molybdenum disulfide (MoS2) are identified. In the adsorption model, Cu SAs are coordinated onto the outermost sulfur (S) plane in a trigonal pyramidal geometry (Cuads@MoS2), while in the substitution model, Cu SAs are substituted with molybdenum (Mo) atoms (Cusub@MoS2), octahedrally coordinating with six S atoms in 1T-MoS2. Interestingly, in both coordination models, Cu(I) and Cu(II) SAs simultaneously exist. Cuads@MoS2 (173 mV) and Cusub@MoS2 (160 mV) demonstrate significantly reduced overpotential (at 10 mA cm–2) for the hydrogen evolution reaction (HER) compared to that of 1T-MoS2 (235 mV) under acidic condition (0.5 M H2SO4). Additionally, theoretical results reveal that different coordination structures would result in distinct active sites, where in Cuads@MoS2, the Cu SAs are the active sites, whereas in Cusub@MoS2, the S atoms most adjacent to the Cu SAs are the major active sites. Accurately determining the atomic coordination structures of SAs and uncovering their structure–property relationships are essential to guiding future geometry and structural research on SACs.

show abstract

“…In Table 1, several heterostructures are demonstrated to exhibit better HER activity than single component. 48,51,52 In order to construct MoS 2 /CoS 2 heterostructures, we have considered the two most common MoS 2 phases, i.e., 2H-MoS 2 and 1T-MoS 2 , as shown in Fig. 1(a and b).…”

Section: Construction Of Mos 2 /Cos 2 Heterostructuresmentioning

confidence: 99%

Interface prompted highly efficient hydrogen evolution of MoS₂/CoS₂heterostructures in a wide pH range

Sun

Wang³

et al. 2023

Phys. Chem. Chem. Phys.

View full text Add to dashboard Cite

show abstract

Interfacial Structural and Electronic Regulation of MoS₂ for Promoting Its Kinetics and Activity of Alkaline Hydrogen Evolution

Cited by 19 publications

References 43 publications

Polysulfide-Induced Synthesis of Coral-Like MoS₂/NiS₂ Nanostructures for Overall Water Splitting

Polysulfide-Induced Synthesis of Coral-Like MoS₂/NiS₂ Nanostructures for Overall Water Splitting

Manipulating Coordination Structures of Mixed-Valence Copper Single Atoms on 1T-MoS₂ for Efficient Hydrogen Evolution

Interface prompted highly efficient hydrogen evolution of MoS₂/CoS₂heterostructures in a wide pH range

Contact Info

Product

Resources

About

Interfacial Structural and Electronic Regulation of MoS2 for Promoting Its Kinetics and Activity of Alkaline Hydrogen Evolution

Cited by 19 publications

References 43 publications

Polysulfide-Induced Synthesis of Coral-Like MoS2/NiS2 Nanostructures for Overall Water Splitting

Polysulfide-Induced Synthesis of Coral-Like MoS2/NiS2 Nanostructures for Overall Water Splitting

Manipulating Coordination Structures of Mixed-Valence Copper Single Atoms on 1T-MoS2 for Efficient Hydrogen Evolution

Interface prompted highly efficient hydrogen evolution of MoS2/CoS2heterostructures in a wide pH range

Contact Info

Product

Resources

About

Interfacial Structural and Electronic Regulation of MoS₂ for Promoting Its Kinetics and Activity of Alkaline Hydrogen Evolution

Polysulfide-Induced Synthesis of Coral-Like MoS₂/NiS₂ Nanostructures for Overall Water Splitting

Polysulfide-Induced Synthesis of Coral-Like MoS₂/NiS₂ Nanostructures for Overall Water Splitting

Manipulating Coordination Structures of Mixed-Valence Copper Single Atoms on 1T-MoS₂ for Efficient Hydrogen Evolution

Interface prompted highly efficient hydrogen evolution of MoS₂/CoS₂heterostructures in a wide pH range