N-Doped Porous Molybdenum Carbide Nanobelts as Efficient Catalysts for Hydrogen Evolution Reaction

Jing, Shengyu; Zhang, Lishang; Luo, Lin; Lu, Jiajia; Yin, Shibin; Shen, Pei Kang; Tsiakaras, Panagiotis

doi:10.1016/j.apcatb.2017.10.025

Cited by 372 publications

(166 citation statements)

References 55 publications

Supporting

Mentioning

159

Contrasting

Order By: Relevance

“…[36][37][38][39][40] The main peak located at 284.34 eV can be attributed to the graphite carbon matrix ( Figure 2C), which corresponds well with the above Raman results ( Figure S8, Supporting Information). [16][17][18][19][20][21] Also, the binding energy of Mo 6+ (Mo 3d 5/2 : 232.5 eV, 3d 3/2 : 235.5 eV) and Mo 4+ (Mo 3d 5/2 : 229.9 eV; 3d 3/2 : 233.0 eV) does not change much and is consistent with the literature values. The small shoulder at about 283 eV can be attributed to C 1s of Mo 2 C according to the NIST database and the reported literature.…”

Section: Fine Tuning Electronic Structures Of Catalystssupporting

confidence: 86%

“…[6,7] Yet, the large energy input validated by overpotential of the hydrogen evolution reaction (HER) greatly limited the practical utilization of the overall water splitting. [11] To overcome these disadvantages, great efforts have been devoted to developing non-noble catalysts with highly efficient and stable HER catalytic activities, [12] including alloy, [13] transition-metal (TM) borides, [14,15] carbides, [16][17][18][19][20] nitrides, [20,21] oxides, [22] phosphides, [6,[23][24][25] and sulfides. [11] To overcome these disadvantages, great efforts have been devoted to developing non-noble catalysts with highly efficient and stable HER catalytic activities, [12] including alloy, [13] transition-metal (TM) borides, [14,15] carbides, [16][17][18][19][20] nitrides, [20,21] oxides, [22] phosphides, [6,[23][24][25] and sulfides.…”

Section: Introductionmentioning

confidence: 99%

“…[36] However, further, it was demonstrated that the intrinsic HER activity of Mo 2 C is usually limited by their large density of empty d-orbitals on the Mo, which restricts the desorption of adsorbed H (H ads ) to generate H 2 . [43] However, nitrogen-doping (N-doping) often intermixes into carbon matrix rather than intercalating into Mo 2 C active sites, [16,[44][45][46][47][48] and thus how to construct a controllable N-doping into Mo 2 C activation site still remains a great challenge. [43] However, nitrogen-doping (N-doping) often intermixes into carbon matrix rather than intercalating into Mo 2 C active sites, [16,[44][45][46][47][48] and thus how to construct a controllable N-doping into Mo 2 C activation site still remains a great challenge.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Fine Tuning Electronic Structure of Catalysts through Atomic Engineering for Enhanced Hydrogen Evolution

Huang

et al. 2018

Advanced Energy Materials

View full text Add to dashboard Cite

An efficient, durable, and low‐cost hydrogen evolution reaction (HER) catalyst is an essential requirement for practical hydrogen production. Herein, an effective approach to facilitate the HER kinetics of molybdenum carbide (Mo2C) electrocatalysts is presented by tuning its electronic structure through atomic engineering of nitrogen implantation. Starting from the organoimido‐derivatized polyoxometalate nanoclusters with inherent MoN bonds, the formation of N‐implanted Mo2C (N@Mo2C) nanocrystals with perfectly adjustable amounts of N atoms is demonstrated. The optimized N@Mo2C electrocatalyst exhibits remarkable HER performance and good stability over 20 h in both acid and basic electrolytes. Further density functional theory calculations show that engineering suitable nitrogen atoms into Mo2C can regulate its electronic structure well and decrease MoH strength, leading to a great enhancement of the HER activity. It could be believed that this ligand‐controlled atomic engineering strategy might influence the overall catalyst design strategy for engineering the activation sites of nonprecious metal catalysts for energy conversions.

show abstract

Section: Fine Tuning Electronic Structures Of Catalystssupporting

confidence: 86%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Fine Tuning Electronic Structure of Catalysts through Atomic Engineering for Enhanced Hydrogen Evolution

Huang

et al. 2018

Advanced Energy Materials

View full text Add to dashboard Cite

show abstract

“…The larger amount of N‐doping in carbon ring can increase the binding energy and improve the stability during HER . Moreover, nitrogen has a chemical interaction with the nearby carbon/metal cores and changes their electronic states, including the structural defects in the carbon matrix …”

Section: Resultsmentioning

confidence: 99%

CoP Embedded in Hierarchical N‐Doped Carbon Nanotube Frameworks as Efficient Catalysts for the Hydrogen Evolution Reaction

2018

View full text Add to dashboard Cite

Highly efficient, nonprecious and stable electrocatalysts for the hydrogen evolution reaction (HER) are absolutely crucial for renewable energy conversion, yet the design of such catalysts remains to be a long and arduous task. Herein, cobalt phosphide (CoP) nanoparticles (NPs) embedded in hierarchical N‐doped carbon nanotube frameworks (CoP‐HNCs) have been synthesized by controlled phosphidation of cobalt NPs embedded in hierarchical N‐doped carbon nanotube frameworks (Co‐HNCs). The Co‐HNCs were prepared by direct carbonization of Co‐based zeolitic imidazolate networks (ZIF‐67). Benefitting from multiple structural and compositional features, such as a multitude of catalytically active sites, a high degree of graphitization, and a thin carbon layer enclosing the NPs, CoP‐HNCs serve as a superior electrocatalyst towards the hydrogen evolution reaction. The synthesized CoP‐HNCs delivered a low overpotential at a current density of 10 mA cm−2 (η10) of 79 mV and 96 mV with small Tafel slope value of 45.6 mV dec−1 and 49.5 mV dec−1 in acidic and alkaline conditions, respectively. In addition, the catalyst showed long‐time durability under both acidic and alkaline electrolyte conditions, further demonstrating their potential to replace Pt‐based precious catalysts.

show abstract

“…Apart from the traditional method through steam from fossil fuels, the process of electrochemical water splitting is considered as an alternative to produce hydrogen through the HER [6][7][8][9]. Until the present, the well-known platinum and platinum-based alloys show the best electrocatalytic performance for HER [10][11][12][13]. However, their high-cost and scarcity impede their wide applications in practice [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Hydrogen Evolution Reaction Property of Molybdenum Disulfide/Nickel Phosphide Hybrids in Alkaline Solution

Yang

Kang

Yan

et al. 2018

Metals

View full text Add to dashboard Cite

Abstract:The hydrogen evolution reaction (HER) property of molybdenum disulfide (MoS 2 ) is undesirable because of the insufficient active edge sites and the poor conductivity. To enhance HER performance of MoS 2 , nickel phosphide (Ni 2 P) was combined with this catalyst and three MoS 2 /Ni 2 P hybrids (38 wt % Ni 2 P addition for MoS 2 /Ni 2 P-38, 50 wt % Ni 2 P addition for MoS 2 /Ni 2 P-50, and 58 wt % Ni 2 P addition for MoS 2 /Ni 2 P-58) were fabricated via a hydrothermal synthesis process. Morphologies, crystallinities, chemical components, specific surface areas, and HER properties of the fabricated MoS 2 /Ni 2 P samples in an alkaline electrolyte were characterized and tested. In addition, the insight into the HER properties of as-prepared catalysts were revealed by the density functional theory (DFT) calculation. Additionally, the stabilities of pure MoS 2 , Ni 2 P, and MoS 2 /Ni 2 P-50 samples were evaluated. The results show that the addition of Ni 2 P can enhance the HER property of the MoS 2 catalyst. Although HER properties of the above-mentioned three MoS 2 /Ni 2 P hybrids are inferior to that of pure Ni 2 P, they are much higher than that of MoS 2 . Among as-prepared three hybrids, MoS 2 /Ni 2 P-50 exhibits the best HER performance, which may be due to its uniform morphology, large specific surface area, and excellent stability. The MoS 2 /Ni 2 P-50 hybrid shows a high cathodic current density (70 mA/cm 2 at −0.48 V), small Tafel slope (~58 mV/decade), and a low charge transfer resistance (0.83 kΩ·cm 2 ).

show abstract

N-Doped Porous Molybdenum Carbide Nanobelts as Efficient Catalysts for Hydrogen Evolution Reaction

Cited by 372 publications

References 55 publications

Fine Tuning Electronic Structure of Catalysts through Atomic Engineering for Enhanced Hydrogen Evolution

Fine Tuning Electronic Structure of Catalysts through Atomic Engineering for Enhanced Hydrogen Evolution

CoP Embedded in Hierarchical N‐Doped Carbon Nanotube Frameworks as Efficient Catalysts for the Hydrogen Evolution Reaction

Hydrogen Evolution Reaction Property of Molybdenum Disulfide/Nickel Phosphide Hybrids in Alkaline Solution

Contact Info

Product

Resources

About