Oxygen atoms substituting sulfur atoms of MoS2 to activate the basal plane and induce the phase transition for boosting hydrogen evolution

The Effect of the 3D Nanoarchitecture and Ni‐Promotion on the Hydrogen Evolution Reaction in MoS2/Reduced GO Aerogel Hybrid Microspheres Produced by a Simple One‐Pot Electrospraying Procedure

“…[ 31,70 ] Moreover, the presence of oxygen in MoS 2 can activate the basal plane increasing the electron density on the adjacent S atoms, which become chemically active facilitating the dissociation of water and assisting the first step of HER in alkaline conditions. [ 71 ]…”

“…This incorporation of O has also an important effect on the HER, actually several papers report better electrocatalytic performances in case of samples incorporating oxygen. [31,70,71] In fact, DFT calculations indicate that substitutional oxygen produces a narrowing of the band gap of MoS 2, therefore enhancing the electron conductivity even in the case of highly defective samples with poor crystallinity. [31,70] Moreover, the presence of oxygen in MoS 2 can activate the basal plane increasing the electron density on the adjacent S atoms, which become chemically active facilitating the dissociation of water and assisting the first step of HER in alkaline conditions.…”

“…[31,70] Moreover, the presence of oxygen in MoS 2 can activate the basal plane increasing the electron density on the adjacent S atoms, which become chemically active facilitating the dissociation of water and assisting the first step of HER in alkaline conditions. [71] From the R CT values in the micropolarization region, it is also possible to extract the exchange current j 0 , which is also used as metrics to evaluate the catalytic performance of electrodic materials. The results are reported in Table S5 in the Supporting Information and obviously mirror the trend observed for R CT .…”

Two-Dimensional MoS2 for Resonant-Gravimetric Detection of Ppb-Level Formaldehyde

“…Finally, 2H-MoS 2 NSs powder is obtained after drying overnight at 60 °C. The 1T-MoS 2 NSs are prepared by a similar hydrothermal method utilizing different molybdenum sources . Next, 15 mmol of CH 4 N 2 S and 3.5 mmol of Na 2 MoO 4 ·2H 2 O are added into 25 mL of deionized water, forming a uniform solution after ultrasonication treatment.…”

Research progress in improving the oxygen evolution reaction by adjusting the 3d electronic structure of transition metal catalysts

“…Anion regulation is effective in improving the conductivity of catalysts, and chemisorption can be optimized to promote the interaction with reactants. 134,135 Metal cations are usually used to provide actual active sites in electrocatalytic reactions; however, in the OER process, the strong positive electric field of the metal cation affects the oxygen analysis, for which polarized anions can be added to adjust the ionic covalent properties of the material and optimize the electronic structure at the metal center site. 136 The difference in the size and negativity between anionic heteroatoms (such as N, P, S, halogen atoms, etc.)…”