MoS2/Co9S8/MoC heterostructure connected by carbon nanotubes as electrocatalyst for efficient hydrogen evolution reaction

Wang, Meng; Jian, Kailiang; Lv, Zepeng; Liu, Dong; Fan, Gangqiang; Zhang, Run; Dang, Jie

doi:10.1016/j.jmst.2020.11.040

Cited by 38 publications

(16 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It can be clearly seen that the binding energies of H and H 2 O are crucial criteria for alkaline HER, and they could act as the descriptors for the HER activity in alkaline solutions. The optimum value of Δ G H* is 0 eV. − Thus, to further probe the HER catalytic performance, we further performed density functional theory (DFT) calculations of the Gibbs free energy of hydrogen adsorption (Δ G H* ) (Figure b) for various hydrogen adsorption sites based on the corresponding models (Figure S11a,d). In Figure b, we find that the Δ G H* of the S site near the N atom of N–MoS 2 /Ti 3 C 2 T X (0.70 eV) is closer to 0 than that of MoS 2 /Ti 3 C 2 T X (1.86 eV), which indicates that the doping of nitrogen stimulates the catalytic activity of the S site.…”

Section: Resultsmentioning

confidence: 99%

Nitrogen-Doped MoS₂/Ti₃C₂T_X Heterostructures as Ultra-Efficient Alkaline HER Electrocatalysts

Liu

Dang

et al. 2021

Inorg. Chem.

Self Cite

View full text Add to dashboard Cite

Molybdenum disulfide (MoS 2 ) is intrinsically inert for the hydrogen evolution reaction (HER) in alkaline media due to its electronic structures. Herein, we tune the electronic structures of MoS 2 by a combined strategy of post-N doping coupled with the synergistic effect of Ti 3 C 2 T X . The as-prepared N-doped MoS 2 / Ti 3 C 2 T X heterostructures show remarkable alkaline HER activity with an overpotential of 225 mV at 140 mA cm −2 , which ranks the N-doped MoS 2 /Ti 3 C 2 T X heterostructures among the best MoS 2 /MXene-based electrocatalysts reported for alkaline HER. The first-principles calculations indicate that the N doping can enhance the activation of nearby S sites of MoS 2 /Ti 3 C 2 T X and thus promote the HER process. This strategy provides a promising way to develop high-efficiency MoS 2 /MXene heterostructure catalysts for alkaline HER.

show abstract

Section: Resultsmentioning

confidence: 99%

Nitrogen-Doped MoS₂/Ti₃C₂T_X Heterostructures as Ultra-Efficient Alkaline HER Electrocatalysts

Liu

Dang

et al. 2021

Inorg. Chem.

Self Cite

View full text Add to dashboard Cite

show abstract

“…In recent years, multitudinous noble metal-free catalysts have been developed by scientists, such as sulfides, [1,5] nitrides, [6] phosphides, [2,7] carbides, [8] and so on. Among these, cobalt phosphides are recently regarded as one of the most promising HER catalysts due to the earth-abundant resources and high catalytic activity.…”

mentioning

confidence: 99%

“…Among these, cobalt phosphides are recently regarded as one of the most promising HER catalysts due to the earth-abundant resources and high catalytic activity. [9] In particular, the catalytic performance can be greatly enhanced by coupling with conductive materials (e.g., graphene, [8,10] MXene, [7,11] carbon nanotubes [5,12] ) due to the enhanced charge transfer kinetics and increased surface area with exposed active sites. [7,13] While, most synthetic cobalt phosphides catalysts are in the form of powders, which have lower surface area and less exposed active sites because of the self-agglomeration and bad morphological characteristics.…”

mentioning

confidence: 99%

Co‐Constructing Interfaces of Multiheterostructure on MXene (Ti₃C₂T_x)‐Modified 3D Self‐Supporting Electrode for Ultraefficient Electrocatalytic HER in Alkaline Media

Wang

et al. 2021

Adv Funct Materials

Self Cite

144

View full text Add to dashboard Cite

Electrocatalysis is a potential method for sustainable hydrogen production, and the development of non-noble metal-based effective electrocatalysts for electrochemical water splitting is the core of exploiting and utilizing renewable energy. Herein, a stupendous electrocatalyst with multiheterostructure interfaces and 3D porous structure is synthesized, and the mechanisms of enhanced electrocatalytic activity combining multicharacterizations and density functional calculations are clarified. Especially, the fabricated Co 2 P/N@Ti 3 C 2 T x @NF (denoted as CPN@TC) exhibits an ultralow overpotential of 15 mV to arrive at a current density of 10 mA cm −2 with the long-term durability and a small Tafel slope of 30 mV dec −1 in 1 m KOH, which even compares with noble metal catalysts favorably. The outstanding HER activity is ascribed to multiheterointerfaces for adsorbing H 2 O and H*, fine conductivity for the electronic transmission, and well-designed structure for rapid transport of ions and gases. It is reasonable to think that the synthetic strategy of CPN@TC can be extended to the preparation of transition-metal-based phosphides for enhanced catalytic performance.

show abstract

“…Therefore, it is of great significance to exploit non‐noble metal‐based catalysts with good catalytic activity, low‐cost, and abundant element reserves. Currently, sulfides, 8,9 phosphides, 10,11 carbides, 7 and nitrides 12 are considered rational materials to replace noble metal‐based catalysts due to their good electrochemical performance and high storage capacity 13 . Among them, nanoscale MoS 2 electrocatalysts have received extensive attention due to their abundant ion transport channels and potential catalytic activity 14 .…”

Section: Introductionmentioning

confidence: 99%

P‐doped MoS₂/Ni₂P/Ti₃C₂T_x heterostructures for efficient hydrogen evolution reaction in alkaline media

Liu

Gao

et al. 2022

J Am Ceram Soc.

Self Cite

View full text Add to dashboard Cite

By combining the advantages of doping to change the electronic structure of molybdenum disulfide (MoS 2 ), transition metal phosphides, and MXene, we proposed the idea of designing and preparing a new type of composite material, P-doped MoS 2 /Ni 2 P/Ti 3 C 2 T x heterostructures (denoted as P@MNTC), to serve as the hydrogen evolution reaction (HER) catalyst of electrochemical water splitting. The as-prepared P@MNTC heterostructures show a significant HER activity with an overpotential of 120 mV at 10 mA cm -2 in alkaline electrolyte, with decreasing 105 and 125 mV compared with those of MoS 2 and MXene, respectively. The density functional theory indicates that the P doping and synergy effect of Ti 3 C 2 T x can enhance the activation of MoS 2 and thus promote dissociation and absorption of H 2 O during HER process. This strategy provides a promising way to develop high-efficiency MoS 2 -and Ti 3 C 2 T x -based composite catalysts for alkaline HER.

show abstract

MoS2/Co9S8/MoC heterostructure connected by carbon nanotubes as electrocatalyst for efficient hydrogen evolution reaction

Cited by 38 publications

References 36 publications

Nitrogen-Doped MoS₂/Ti₃C₂T_X Heterostructures as Ultra-Efficient Alkaline HER Electrocatalysts

Nitrogen-Doped MoS₂/Ti₃C₂T_X Heterostructures as Ultra-Efficient Alkaline HER Electrocatalysts

Co‐Constructing Interfaces of Multiheterostructure on MXene (Ti₃C₂T_x)‐Modified 3D Self‐Supporting Electrode for Ultraefficient Electrocatalytic HER in Alkaline Media

P‐doped MoS₂/Ni₂P/Ti₃C₂T_x heterostructures for efficient hydrogen evolution reaction in alkaline media

Contact Info

Product

Resources

About

MoS2/Co9S8/MoC heterostructure connected by carbon nanotubes as electrocatalyst for efficient hydrogen evolution reaction

Cited by 38 publications

References 36 publications

Nitrogen-Doped MoS2/Ti3C2TX Heterostructures as Ultra-Efficient Alkaline HER Electrocatalysts

Nitrogen-Doped MoS2/Ti3C2TX Heterostructures as Ultra-Efficient Alkaline HER Electrocatalysts

Co‐Constructing Interfaces of Multiheterostructure on MXene (Ti3C2Tx)‐Modified 3D Self‐Supporting Electrode for Ultraefficient Electrocatalytic HER in Alkaline Media

P‐doped MoS2/Ni2P/Ti3C2Tx heterostructures for efficient hydrogen evolution reaction in alkaline media

Contact Info

Product

Resources

About

Nitrogen-Doped MoS₂/Ti₃C₂T_X Heterostructures as Ultra-Efficient Alkaline HER Electrocatalysts

Nitrogen-Doped MoS₂/Ti₃C₂T_X Heterostructures as Ultra-Efficient Alkaline HER Electrocatalysts

Co‐Constructing Interfaces of Multiheterostructure on MXene (Ti₃C₂T_x)‐Modified 3D Self‐Supporting Electrode for Ultraefficient Electrocatalytic HER in Alkaline Media

P‐doped MoS₂/Ni₂P/Ti₃C₂T_x heterostructures for efficient hydrogen evolution reaction in alkaline media