Electrospinning Hetero‐Nanofibers of Fe₃C‐Mo₂C/Nitrogen‐Doped‐Carbon as Efficient Electrocatalysts for Hydrogen Evolution

Abstract

Invited for this month′s cover is the group of Qingsheng Gao at Jinan University. The image shows the synergistically improved kinetics on Fe3C‐Mo2C hetero‐interfaces for hydrogen evolution, as illustrated by the easily passed hurdles in hurdle race. The Full Paper itself is available at 10.1002/cssc.201700207.

Recent Advances in Electrocatalytic Hydrogen Evolution Using Nanoparticles

“…Compared with single-phase metal carbides, the metal carbides with two phases forming a heterostructure have been proven to demonstrate superior electrochemical activities due to the synergistic effects at the interfaces. Indeed, a series of TMC-based heterostructures were exploited, for example, Mo 2 C-WC, 587 Mo 2 C-Fe 3 C, 588 Mo 2 C-MoS x , 382,383,547,589 Mo 2 C-VC, 590 Mo 2 C-Mo 2 N, 576 Mo 2 C-Ni 2 P, 591 W x C-WN, 592 W x C-WS 2 , 593 Co/β-Mo 2 C@NCNT, 594 Mo 2 C/NiS 2 / NCNTs, 595 and WC−CoP. 596 Huang et al designed and fabricated a crystalline carbon-wrapped Mo 2 C and VC nanoheterojunction (Mo 2 C/VC@C) via in situ phase segregation of microscale V 2 MoO 8 using NaHCO 3 as the carbon source in a magnesium thermic reaction (Figure 50B).…”

Flexible and Wearable All-Solid-State Al–Air Battery Based on Iron Carbide Encapsulated in Electrospun Porous Carbon Nanofibers

“…Among them, transition metal carbides, such as Fe 3 C, have shown promising ORR performance because of its ability to attract nitrogen, resulting in the formation of FeN x and N x C as catalytic active sites. 16,17 Despite that, limited reports are available on the modified transition metal carbide-based catalysts that are able to meet the high capacity, catalytic activity, mechanical flexibility, and long-term stability of the solid-state and wearable Al−air batteries. 9,18 The electrospinning technique has been proven as an efficient process to produce fibrous carbon-based nanocomposites with nitrogen doping and good electrical conductivity.…”

“…Among the many potential candidates, nitrogen-doped carbonaceous materials have demonstrated promising electrocatalytic properties for the air cathodes in metal–air batteries. , In particular, N-doped carbonaceous materials incorporated with the transition metal (such as Fe, Co, and Ni) compounds , can significantly promote ORR activity to a level comparable to that of noble metal-based materials (e.g., Pt) because of their low electrical resistance and high intrinsic activity. Among them, transition metal carbides, such as Fe 3 C, have shown promising ORR performance because of its ability to attract nitrogen, resulting in the formation of FeN x and N x C as catalytic active sites. , Despite that, limited reports are available on the modified transition metal carbide-based catalysts that are able to meet the high capacity, catalytic activity, mechanical flexibility, and long-term stability of the solid-state and wearable Al–air batteries. , The electrospinning technique has been proven as an efficient process to produce fibrous carbon-based nanocomposites with nitrogen doping and good electrical conductivity. , Whereas, the inner structure and composition of the nanofibers can be controlled for specific applications.…”

Synergistically coupling P-doped Mo2C@N, P dual-doped carbon-nanoribbons as an efficient electrocatalyst for the hydrogen evolution reaction

“…The Mo 3d peaks at 228.6 eV and 231.8 eV can be ascribed to Mo 2+ species, demonstrating the formation of Mo 2 C, which is believed to be the active center. 28 The peaks centered at 232.2 eV and 235.1 eV are assigned to MoO 3 that is derived from the surface oxidation, which is unfavorable for the HER. 29…”