Design and modulation principles of molybdenum carbide-based materials for green hydrogen evolution

MXenes as Superexcellent Support for Confining Single Atom: Properties, Synthesis, and Electrocatalytic Applications

“…For instance, Wei and co-workers theoretically designed a bifunctional ORR/OER electrocatalyst by isolated Pt/Pd atom doping of Nb 2 CT 2 MXenes. [103] Among them, Nb 2 CF 2 -V F -Pt catalyst displayed the excellent catalytic performance compared to landmark Pt (111) and IrO 2 (110). The abovementioned results reveal that confining single atom by substituting surface atoms is a feasible strategy to fabricate MXene-supported isolated atom for high-efficiency electrocatalytic energy conversion.…”

“…[149,150] Therefore, exploring stable Figure 7. a) Free-energy result for HER on and Ti 3 C 2 T X , Pt (111), and Ru SA/Ti 3 C 2 T X , respectively. b) The LSV curve of fabricated electrocatalyst for acidic HER.…”

“…In general, HER can be conducted via two different pathways containing Volmer–Tafel reaction (H + + e − + * → H*, 2H* → H 2 + 2*) and Volmer–Heyrovsky reaction (H + + e − + * → H*, H* + H + + e − → H 2 + *), where * represents the surface active site of electrocatalysts. [ 110,111 ] In HER process, the water dissociation and hydrogen adsorption are the main rate‐determining steps. [ 112 ] Recently, MXenes are widely utilized in electrochemical HER reaction on account of their superior electronic conductivity, extensive specific surface area, excellent hydrophilicity, and their “Pt‐like behavior.” [ 44,113 ] Although MXenes exhibit numerous advantages for HER, the catalytic performance is restricted because of the limited active site, and tends to overlap for layered MXenes.…”

Priority Occupation of C-Sites by N-Confining P-Implantation in Pyrrodic N-Sites in NCNT@P,N-Mo2C for Highly Efficient Electrocatalytic Hydrogen Evolution

“…Moreover, the modulation of the surface chemistry and electronic structures of Mo 2 C by designing heterojunction or heterointerface and heteroatom doping is also an effective strategy to boost intrinsic HER kinetics. − For instance, Cheng reported that MoS 2 /Mo 2 C microspheres exhibit excellent HER activity at all pH values, which is related to the surface chemistry of the MoS 2 . The surface chemistry at the atomic level is crucial for interfacial mass transfer and electron transfer at large current densities.…”

Hierarchical CoSeS nanostructures assisted by Nb doping for enhanced hydrogen evolution reaction

“…Water splitting is a green and potential method to produce hydrogen, and its realization paths, including photocatalysis and electrocatalysis, all have attractive properties [4][5][6][7]. Alt-hough the electrocatalytic process is remarkable for its high efficiency and environmental friendliness, it exhibits sluggishness and low efficiency of anode and cathode reactions [8,9]. Therefore, it is imperative to develop green and economical catalysts to improve the efficiency of the hydrogen evolution reaction (HER) as much as possible [10].…”