Atomic-scale intercalation of N-doped carbon into monolayered MoSe2-Mo2C heterojunction as a highly efficiency hydrogen evolution reaction catalyst

Tang, Jing; Huang, Chao; Wu, Qidi; Cui, Ailin; Li, Weijun

doi:10.1016/j.jelechem.2021.115897

Cited by 7 publications

(4 citation statements)

References 42 publications

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“…These peaks are ascribed to the C�C/C−C, C�N, and N−C bonds within the carbon structure. Furthermore, a subtle peak spanning from around 288 to 289 eV is discernible, signifying the presence of residual oxygen groups within the carbon matrix, 17 while a weak peak at 283 eV corresponds to the formation of Mo−C bonds, 27 which is in concert with the Mo 3d spectrum. The nitrogen dopant species were further investigated by analyzing the N 1s spectrum.…”

Section: Resultsmentioning

confidence: 99%

Reduced Graphene Oxide/MoSe₂/Nitrogen-Doped Carbon Nanocomposite as Anode for Lithium-Ion-Based Dual-Ion Batteries

Ahmed,

Gao,

Wang

et al. 2024

ACS Appl. Nano Mater.

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A nanocomposite of reduced graphene oxide/ MoSe 2 /nitrogen-doped carbon (RGO/MoSe 2 /NC) was obtained by the in situ conversion of a composite composed of the organic molybdenum complex MoO 2 (acetylacetone)(1,10-phenanthroline) and graphene oxide. The as-obtained nanocomposite demonstrated a distinctive structure where ultrathin MoSe 2 nanosheets were uniformly distributed in the NC matrix that firmly attached to the RGO nanosheets. The NC and RGO not only provided a synergistic framework for electron transport and Li + diffusion but also helped to expose more active sites and buffer the volume changes of MoSe 2 during the lithiation/delithiation process. Notably, a lithium-ion-based dual-ion battery configuration with the RGO/MoSe 2 /NC nanocomposite and commercial graphite respectively serving as the anode and cathode was assembled, which demonstrated remarkable cycling stability, retaining 70% (70 mA h g −1 based on cathode at 2C) of its initial capacity after 500 cycles. Moreover, it exhibited a noteworthy reversible capacity and exceptional rate capability within the high operational voltage window of 2−5 V.

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Section: Resultsmentioning

confidence: 99%

Reduced Graphene Oxide/MoSe₂/Nitrogen-Doped Carbon Nanocomposite as Anode for Lithium-Ion-Based Dual-Ion Batteries

Ahmed,

Gao,

Wang

et al. 2024

ACS Appl. Nano Mater.

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“…9e. 86 The outcomes indicated that MoSe 2 -Mo 2 C/NC exhibited a higher HER activity than MoSe 2 /NC and Mo 2 C/NC in acidic media. Notably, this material requires only a voltage of - 87 The authors prepared a core-shell architecture of Mo 2 C@NC/Mo 2 C via hydrothermal technique, as shown in Fig.…”

Section: Enhancement Strategies In Mo X C For Hermentioning

confidence: 98%

Review—Recent Advancements in Molybdenum Carbides for Efficient Hydrogen Evolution Reaction

Tran,

Lee,

Bui

et al. 2024

J. Electrochem. Soc.

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The quest for economical and sustainable electrocatalysts to facilitate the hydrogen evolution reaction (HER) is paramount in addressing the pressing challenges associated with carbon dioxide emissions. Molybdenum carbide-based nanomaterials have emerged as highly promising electrocatalysts for HER due to their Pt-like catalytic proficiency, exceptional stability, and the versatility of their crystal phases. Within this comprehensive review, we explore the diverse methodologies for synthesizing molybdenum carbides, including solid-gas, solid-solid, and solid-liquid phase reactions. In addition, a thorough elucidation of the hydrogen generation process through water electrolysis is provided. Furthermore, a spectrum of innovative strategies aimed at augmenting the performance of molybdenum carbides in the HER milieu is introduced, encompassing cutting-edge techniques such as phase-transition engineering, the construction of heterostructures, hetero-atom doping, the integration of hybrid structures with carbon materials, defect engineering, and meticulous surface modification. The review culminates by underscoring the current challenges and the promising prospects in the advancement of electrocatalysts for hydrogen production, with a dedicated focus on molybdenum carbide-based catalysts.

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“…In addition, fitting peaks at 228.6 eV and 231.6 eV were also found in the Mo 3d of MoSe 2 @C-55, which corresponded to Mo 2+ 3d 5/2 and 3d 3/2 , indicating that Mo 2 C was generated during the preparation of MoSe 2 @C-55 [51,52], suggesting that a strong interaction between the carbon formed by the in situ carbonization of glucose and the Mo atoms was formed. The specific binding energy data in Table S1 show that the binding energy of Mo 4+ 3d 5/2 and 3d 3/2 in MoSe 2 @C-55 was 0.2 eV lower than that of MoSe 2 and MoSe 2 /C, which was caused by the electron transfer between MoSe 2 and Mo 2 C [53], and a strong interaction was formed. In addition, peaks at binding energies of 232.5-232.7 eV and 235.4-235.7 eV, corresponding to Mo-O, were observed due to the surface oxidation that took place when MoSe 2 @C-55 and MoSe 2 /C were exposed to air [47][48][49][50][51][52], but the binding energy of MoSe 2 @C-55 was lower than that of MoSe 2 /C, which may be due to the protective effect of in situ-formed carbon on the surface of MoSe 2 @C-55, resulting in a reduction in the oxidation degree.…”

Section: Xps Analysis Of Catalystsmentioning

confidence: 99%

“…The oxygen vacancies on the surface improved the dissociation of CO 2 and tended to produce the desired methanol [57]. Moreover, only the MoSe 2 @C-55 sample showed a peak at 282.6 eV, which corresponded to a C-Mo bond [53,54]. The data listed in Figure S5 also show that the binding energy of Mo 3d showed a negative shift with the increase in the C/Mo ratio in the precursor, and the Mo 2+ /Mo 4+ ratio on the surface of the catalyst displayed a positive correlation with the carbon content in the precursor (Table S5), suggesting that a higher carbon content in the precursor was beneficial to generating Mo 2 C. that the binding energy of Mo 3d showed a negative shift with the increase in the C/Mo ratio in the precursor, and the Mo 2+ /Mo 4+ ratio on the surface of the catalyst displayed a positive correlation with the carbon content in the precursor (Table S5), suggesting that a higher carbon content in the precursor was beneficial to generating Mo2C.…”

Section: Xps Analysis Of Catalystsmentioning

confidence: 99%

In Situ Carbon-Confined MoSe2 Catalyst with Heterojunction for Highly Selective CO2 Hydrogenation to Methanol

Sun,

Xiao,

2024

Molecules

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The synthesis of methanol from CO2 hydrogenation is an effective measure to deal with global climate change and an important route for the chemical fixation of CO2. In this work, carbon-confined MoSe2 (MoSe2@C) catalysts were prepared by in situ pyrolysis using glucose as a carbon source. The physico-chemical properties and catalytic performance of CO2 hydrogenation to yield methanol were compared with MoSe2 and MoSe2/C. The results of the structure characterization showed MoSe2 displayed few layers and a small particle size. Owing to the synergistic effect of the Mo2C-MoSe2 heterojunction and in situ carbon doping, MoSe2@C with a suitable C/Mo mole ratio in the precursor showed excellent catalytic performance in the synthesis of methanol from CO2 hydrogenation. Under the optimal catalyst MoSe2@C-55, the selectivity of methanol reached 93.7% at a 9.7% conversion of CO2 under optimized reaction conditions, and its catalytic performance was maintained without deactivation during a continuous reaction of 100 h. In situ diffuse infrared Fourier transform spectroscopy studies suggested that formate and CO were the key intermediates in CO2 hydrogenation to methanol.

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Atomic-scale intercalation of N-doped carbon into monolayered MoSe2-Mo2C heterojunction as a highly efficiency hydrogen evolution reaction catalyst

Cited by 7 publications

References 42 publications

Reduced Graphene Oxide/MoSe₂/Nitrogen-Doped Carbon Nanocomposite as Anode for Lithium-Ion-Based Dual-Ion Batteries

Reduced Graphene Oxide/MoSe₂/Nitrogen-Doped Carbon Nanocomposite as Anode for Lithium-Ion-Based Dual-Ion Batteries

Review—Recent Advancements in Molybdenum Carbides for Efficient Hydrogen Evolution Reaction

In Situ Carbon-Confined MoSe2 Catalyst with Heterojunction for Highly Selective CO2 Hydrogenation to Methanol

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Atomic-scale intercalation of N-doped carbon into monolayered MoSe2-Mo2C heterojunction as a highly efficiency hydrogen evolution reaction catalyst

Cited by 7 publications

References 42 publications

Reduced Graphene Oxide/MoSe2/Nitrogen-Doped Carbon Nanocomposite as Anode for Lithium-Ion-Based Dual-Ion Batteries

Reduced Graphene Oxide/MoSe2/Nitrogen-Doped Carbon Nanocomposite as Anode for Lithium-Ion-Based Dual-Ion Batteries

Review—Recent Advancements in Molybdenum Carbides for Efficient Hydrogen Evolution Reaction

In Situ Carbon-Confined MoSe2 Catalyst with Heterojunction for Highly Selective CO2 Hydrogenation to Methanol

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Product

Resources

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Reduced Graphene Oxide/MoSe₂/Nitrogen-Doped Carbon Nanocomposite as Anode for Lithium-Ion-Based Dual-Ion Batteries

Reduced Graphene Oxide/MoSe₂/Nitrogen-Doped Carbon Nanocomposite as Anode for Lithium-Ion-Based Dual-Ion Batteries