Core–shell Mo₂C@NC/Mo₂C hollow microspheres as highly efficient electrocatalysts for the hydrogen evolution reaction

Abstract

Developing low-cost and highly efficient electrocatalysts for the hydrogen evolution reaction (HER) has stimulated extensive interest. Molybdenum carbide materials have been proposed as promising alternatives to noble platinum-based catalysts due...

Green synthesis of carbon-supported ultrafine ZnS nanoparticles for superior lithium-ion batteries

“…The guanine moieties then form a CN-polymer through intramolecular hydrogen bonding in the presence of Zn 2+ ions. 27 Meanwhile, thiourea releases S 2− ions which react with Zn 2+ ions to form ZnS NPs. These ZnS NPs intertwine with the CN-polymer, giving rise to a hydrangea-like precursor.…”

Guanosine-assisted synthesis of a core–shell Mo2N/Mo2C/C structure for enhanced hydrogen evolution reaction

“…The peaks of Mo 4+ species at 229.5 eV/233.4 eV and the Mo 6+ species at 233.0 eV/ 236.2 eV are ascribed to MoO 2 and MoO 3 due to the partial oxidation of the surface, which are commonly observed when molybdenum carbide and molybdenum nitride are exposed to air. One can see that Mo 2+ and Mo 3+ species with peaks at 228.7 eV/231.0 eV and 229.0 eV/232.2 eV correspond to Mo 2 C or Mo 2 N, 34 which has been confirmed to be active in the electrocatalytic HER. 29 The spectra of N 1s were divided into three peaks corresponding to the Mo-N species (397.5 eV), pyridine N (399.5 eV), and graphite N (401.6 eV).…”

Review—Recent Advancements in Molybdenum Carbides for Efficient Hydrogen Evolution Reaction

“…86 The outcomes indicated that MoSe 2 -Mo 2 C/NC exhibited a higher HER activity than MoSe 2 /NC and Mo 2 C/NC in acidic media. Notably, this material requires only a voltage of - 87 The authors prepared a core-shell architecture of Mo 2 C@NC/Mo 2 C via hydrothermal technique, as shown in Fig. 10a.…”