Hierarchical composite structure of few-layers MoS 2 nanosheets supported by vertical graphene on carbon cloth for high-performance hydrogen evolution reaction

Modulating Schottky Barrier of MoS2 to Enhance Hydrogen Evolution Reaction Activity by Incorporating with Vertical Graphene Nanosheets Derived from Organic Liquid Waste

“…The interlayer spacing of MoS 2 sheets is approximately of 0.61 nm, which is assigned to be the (002) hexagonal crystal planes. It is thought that the present (002) planes provides sufficient crystal mismatch as active sites to promote HER . The Figure d demonstrates a curled rim structure of VGNS, consisting of 3∼20 layers of graphene with the interlayer spacing of about 0.35 nm, which is in accordance with previous results of SEM images and Raman spectrum.…”

Interlayer Nanoarchitectonics of Two‐Dimensional Transition‐Metal Dichalcogenides Nanosheets for Energy Storage and Conversion Applications

“…[10,133] [8,134,135] Several strategies have been developed to optimize the HER catalytic efficiency and stability of MX 2 materials: (i) increasing the number of exposed active edge sites (by reducing size, increasing defects on the basal planes, making vertically aligned morphology etc. ); [14,16,17,77] (ii) improving electrical conductivity of the MX 2 electrocatalysts (by incorporation conductive carbon materials, semiconducting (2H)-to-metallic (1T) phase transformation etc); [19,20,[136][137][138][139] and (iii) enhancing the catalytic activities of the active sites by alloying/doping. [28,29] Recent studies reveal that interlayer expansion of MX 2 nanosheets is an additional strategy for improving their HER activity via tuning electronic structures of the catalytically active sites.…”

Vanadium carbide nanoparticles encapsulated in graphitic carbon network nanosheets: A high-efficiency electrocatalyst for hydrogen evolution reaction

“…Recently, construction or encapsulation of electrocatalysts in carbon nanotubes (CNTs) [17][18][19], graphene [20,21], and other carbon-based materials [22][23][24][25][26] has been demonstrated to mitigate corrosion in acidic media thus improving the long-term activity and electrocatalytic activity as a result of the improved electrical contact between the active electrocatalyst with the conductive carbon substrate. However, it is not easy to Herein, hierarchical nanosheets (NS) composed of VC nanoparticles encapsulated in highly conductive mesoporous graphitic carbon network (VC-NS) are synthesized by a hydrothermal reaction followed by the low-temperature and environmentally friendly magnesium thermic reduction (MTR) using V 2 O 5 nanosheets as both the template and precursor, as schematically illustrated in Scheme 1.…”