Synthesis and characterization of porous carbon–MoS₂ nanohybrid materials: electrocatalytic performance towards selected biomolecules

Abstract

Porous carbon nanohybrids are promising materials as high-performance electrodes for both sensing and energy conversion applications.

Non‐Equilibrium Synthesis of Highly Active Nanostructured, Oxygen‐Incorporated Amorphous Molybdenum Sulfide HER Electrocatalyst

“…A low‐intensity doublet with its S 2p 3/2 component centered at 168.5 ± 0.3 eV is also registered, related to sulfur in a 6 + oxidation state and assigned to SO 4 2− groups arising for the surface oxidation occurring upon electrochemical testing. [ 106,107 ] Concerning the Mo 3d region, the apical S 2− /bridging S 2 2− doublet at 227 eV decreases concordantly to its S 2p counterpart, while the terminal S 2 2− /unsaturated S 2− doublet at 226 eV is marginally affected. The doublet centered at 229.2 eV ascribed to Mo IV compounds of the amorphous MoS x phase severely decreases in intensity and an additional Mo 3d doublet appears close‐by, with its Mo 3d 5/2 component centered at 229.7 ± 0.3 eV.…”

On the Use of Surfactant‐Complexed Chitosan for Toughening 3D Printed Polymethacrylate Composites

“…[ 40,52 ] Likewise, the XPS survey scans of CS, SDS, and SMCS reveal the major constituent elements are C (284.8 eV) and O (531.8 eV), as expected, with SMCS also showing the presence of N (401.2 eV) from CS and S (167.5 eV) and Na (1071.2 eV) from SDS (Figure 2b). In the high‐resolution N 1s and S 2p spectra of SMCS (Figure S5a,b, Supporting Information), the peak at 401.5 eV, is related to protonated amine (NH 3 + ) groups of CS while the peak at 168.5 eV is assigned to sulfate (SO 3 – ) groups of SDS, [ 53,54 ] confirming the polyelectrolyte‐surfactant complex nature of SMCS formed via ionic interactions.…”

Solid-state synthesis of few-layer cobalt-doped MoS2 with CoMoS phase on nitrogen-doped graphene driven by microwave irradiation for hydrogen electrocatalysis

“…2À , which is in agreement with the increase in oxygen and cobalt content, probably forming Co and Mo sulfates. 30,31,43,44 For the case of cobalt, the Co 2p spectrum can be resolved into two spin-orbit doublets and four satellites. The rst doublet located at 778.8/793.7 eV is attributed to cobalt suldes, while the doublet at 781.4/796.9 eV and all four satellites correspond to oxidized Co 2+ /Co 3+ , 45,46 the latter increase in intensity only for samples with at least 15% Co, suggesting that at low Co content the vast majority is in the form of suldes.…”