Electrocatalytic Hydrogen Evolution Reaction of 2H MoSe2 Nanoflowers and 2H-MoSe2/α-MoO3 Heterostucture

Feng, Qingliang; Duan, Kaiyue; Hong, Xie; Xue, Muyin; Du, Yongling; Wang, Chunming

doi:10.1016/j.electacta.2016.11.002

Cited by 23 publications

(14 citation statements)

References 31 publications

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“…Likewise peaks at 231.5 eV and 232.5 eV correspond to the Mo 3d 3/2 of MoSe 2 and MoO 3 respectively . Figure D displayed one couple of peaks at 54.4 eV which corresponds to Se 3d orbital, indicating the existence of Se 2− in the as synthesized material , and the O 1s spectrum (Figure S2) displayed one couple of peak around 530 eV indicating the availability of oxides in the composite . On the other hand, MoSe 2 −MoO 3 sample was further characterized by UV‐Vis and FTIR.…”

Section: Resultsmentioning

confidence: 64%

“…XRD pattern of MoSe 2 −MoO 3 showed the characteristic 2θ peaks at 12.88°, 29.68°, 32.78°, 41.29° and 54.42° for (002), (111), (101), (220) and (110) diffraction planes (Figure B). In which 12.88°, 32.78° and 54.42° 2θ peaks correspond to MoSe 2 and 29.68° and 41.29° 2θ peaks relate to MoO 3 indicating the availability of both MoSe 2 −MoO 3 as composite . In addition, the obtained XRD spectrum of MoSe 2 −MoO 3 are comparable with the simulated XRD patterns of MoSe 2 (00‐029‐0914) and MoO 3 (00‐005‐0508) available in Figure B.…”

Section: Resultsmentioning

confidence: 99%

“…Figure E is the UV‐Vis spectrum of the MoSe 2 −MoO 3 composite recorded in 200–800 nm range and showed a strong peak in the range from 550 to 800 nm, which was in agreement with the previous reports . Figure F corresponds to the FTIR spectrum of MoSe 2 −MoO 3 and found various absorption peaks at 3572, 3339, 2053 and 1576 cm −1 for O−Mo−O, Mo−OH and Se−O respectively and it also showed peak at 864, 509 and 428 cm −1 for Se−O−Se . These peaks suggest that selenium oxide exists in the prepared composite, whereas weak absorption peak indicate that the amount of SeO 2 is small.…”

Section: Resultsmentioning

confidence: 99%

“…Although various techniques like chemical vapor deposition , mechanical exfoliation hydrothermal and various other methods were developed for synthesis of novel materials, hydrothermal method yields higher active sites in the nanostructure of MoSe 2 as rod‐, tube‐ and sheet‐like nanomaterials . But MoO 3 always co‐exists as minor by‐product in the hydrothermally synthesized MoSe 2 and such MoSe 2 −MoO 3 heterostructure can enhance the catalytic performance of the material.…”

Section: Introductionmentioning

confidence: 99%

“…But MoO 3 always co‐exists as minor by‐product in the hydrothermally synthesized MoSe 2 and such MoSe 2 −MoO 3 heterostructure can enhance the catalytic performance of the material. In addition, MoO 3 is an emerging semiconductor with bandgap of 2.8∼3.6 eV and is considered as an excellent 2D material in various electrochemical applications . These findings inspired us to explore such MoSe 2 −MoO 3 heterostructure for electrochemical sensing applications like nitrite detection.…”

Section: Introductionmentioning

confidence: 99%

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Single Step Synthesis of MoSe₂−MoO₃ Heterostructure for Highly Sensitive Amperometric Detection of Nitrite in Water Samples of Industrial Areas

Vishnu

Badhulika

2019

Electroanalysis

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The present work reports a simple and single‐step hydrothermal synthesis of MoSe2−MoO3 composite for highly sensitive and selective electrochemical oxidation of nitrite. FESEM of the MoSe2−MoO3 hybrid revealed the formation of composite as laminated structure of different sizes piled up together as finger‐like MoSe2 bars whilst other physico‐chemical characterizations (XRD, FTIR, UV‐Vis, XPS) confirmed that co‐existence of MoO3 as a major by‐product of hydrothermal synthesis. The as‐fabricated MoSe2−MoO3 composite based nitrite sensor showed remarkable selectivity and reproducibility with <3s of response time, excellent sensitivity and detection limit of 10.84 A M−1 cm−2 (R2=0.996) and 0.1 μM, respectively, in the range of 2.5–80 μM. The obtained sensitivity can be credited to the high surface area obtained from 1T phase MoSe2 and α phase MoO3 as the sensing material. The developed sensor was effectively evaluated for electrochemical recognition of nitrite in the water samples (potable and tap water) gathered from an industrial area. This new and efficient MoSe2−MoO3 based electrode material offers a new frontier for the progress of a novel composites by simple and single‐step approach which can be used for progress of non‐enzymatic and inexpensive electrochemical sensors for a wide range of analytical applications.

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Section: Resultsmentioning

confidence: 64%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Single Step Synthesis of MoSe₂−MoO₃ Heterostructure for Highly Sensitive Amperometric Detection of Nitrite in Water Samples of Industrial Areas

Vishnu

Badhulika

2019

Electroanalysis

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Enhanced Potassium Ion Battery by Inducing Interlayer Anionic Ligands in MoS_1.5Se_0.5 Nanosheets with Exploration of the Mechanism

Fan

Wang

et al. 2020

Advanced Energy Materials

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potential high energy density, resulting from the low standard reduction potential of potassium (−2.93 V vs the standard hydrogen potential, E 0 ), close to that of lithium (−3.04 V vs E 0 ). [1][2][3][4] Based on ab initio molecular dynamics simulations, it has been proven that the diffusion coefficient of K + is about three times larger than that of Li + . [3] Meanwhile, K + has high ion mobility and ionic conductivity in propylene carbonate (PC) electrolyte. Nevertheless, facing the issues arising from it having the largest atomic radius (1.38 Å) compared to lithium (0.68 Å), sodium (0.97 Å), and calcium (1.18 Å), [5][6][7] it is quite challenging to design suitable materials with the capability of highly reversible and long-term K + insertion and extraction processes. [8,9] Based on global academic research, various materials have been explored and designed for KIBs, such as transition metal oxides, carbon-based materials, and polyanion based materials, all of which showed signs of potential higher performance. [10][11][12][13][14][15][16][17][18][19][20][21] Due to their overwhelming advantages, such as large interlayer spacing and reversible conversion efficiency, 2D materials were paid much more attention than bulk materials, and various strategies have been devised to optimize their performance by morphology and physical structure control. [11,[22][23][24][25] Taking molybdenum disulfide (MoS 2 ) as an example, it possesses a graphene-like lamellar structure consisting of metal atoms sandwiched between two layers of chalcogens by weak van der Waals forces. [26][27][28] According to the Randles-Sevcik equation, however, the K + diffusion coefficient will be gradually decreased with higher K + intercalation and MoS 2 reduction, which results in a sluggish kinetic reaction rate and unsatisfactory energy conversion efficiency, particularly at high current density. [25][26][27][28] In additional, MoS 2 nanosheets usually tend to exfoliate and pulverize because of the obvious volumetric changes in the course of long-term ion intercalation, thus resulting in rapid capacity fading and unsatisfactory cycling stability. Here, a desirable approach is used to narrow interlayer energy band of MoS 2 and thus achieve advanced metallic properties by anionic Se doping to form S 1.5 Se 0.5 interlayer ligands, at which an expanded interlayer spacing benefiting for optimal van der Waals forces can be realized as well. This combines the complementary advantages from two kinds of anion ligands with high conductivity and good affinity with The strategy of inducing interlayer anionic ligands in 2D MoS 1.5 Se 0.5 nanosheets is employed to consolidate the interlayer band gap and optimize the electronic structure for the potassium ion battery. It combines complementary advantages from two kinds of anionic ligands with high conductivity and good affinity with potassium ions. The potassium ion diffusion rate is accelerated as well by an optimized lower energy barrier for ion diffusion pathways, with the formation of highly reversible...

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1T‐MoS₂ Enriched Hierarchical MoS₂/MoO₃ Produced by Phase Transformation for Efficient Hydrogen Evolution Reaction

Zhang

Liu

Lü

et al. 2023

Chemistry An Asian Journal

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In recent years, transition metal sulfides have been widely studied in the context of their use as electrocatalysts. The electrocatalytic propensity of the classical semiconductor MoS2, which exists in the 1T and 2H phase structures, has attracted extensive attention. Therefore, the synthesis of highly active and stable MoS2‐based catalysts has become the goal of many research efforts. We recently developed a method that can be utilized to prepare the MoS2/MoO3 heterojunction in a phase‐controlled manner. 1T‐MoS2 phase enriched MoS2/MoO3 heterojunction can be generated using a simple hydrothermal and acid treatment sequence and that the heterojunction has a unique three‐dimensional structure, large active surface area, and therefore achieve a low overpotential and high catalytic current density, as well as long‐term stability for the hydrogen evolution reaction.

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Electrocatalytic Hydrogen Evolution Reaction of 2H MoSe2 Nanoflowers and 2H-MoSe2/α-MoO3 Heterostucture

Cited by 23 publications

References 31 publications

Single Step Synthesis of MoSe₂−MoO₃ Heterostructure for Highly Sensitive Amperometric Detection of Nitrite in Water Samples of Industrial Areas

Single Step Synthesis of MoSe₂−MoO₃ Heterostructure for Highly Sensitive Amperometric Detection of Nitrite in Water Samples of Industrial Areas

Enhanced Potassium Ion Battery by Inducing Interlayer Anionic Ligands in MoS_1.5Se_0.5 Nanosheets with Exploration of the Mechanism

1T‐MoS₂ Enriched Hierarchical MoS₂/MoO₃ Produced by Phase Transformation for Efficient Hydrogen Evolution Reaction

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Electrocatalytic Hydrogen Evolution Reaction of 2H MoSe2 Nanoflowers and 2H-MoSe2/α-MoO3 Heterostucture

Cited by 23 publications

References 31 publications

Single Step Synthesis of MoSe2−MoO3 Heterostructure for Highly Sensitive Amperometric Detection of Nitrite in Water Samples of Industrial Areas

Single Step Synthesis of MoSe2−MoO3 Heterostructure for Highly Sensitive Amperometric Detection of Nitrite in Water Samples of Industrial Areas

Enhanced Potassium Ion Battery by Inducing Interlayer Anionic Ligands in MoS1.5Se0.5 Nanosheets with Exploration of the Mechanism

1T‐MoS2 Enriched Hierarchical MoS2/MoO3 Produced by Phase Transformation for Efficient Hydrogen Evolution Reaction

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Single Step Synthesis of MoSe₂−MoO₃ Heterostructure for Highly Sensitive Amperometric Detection of Nitrite in Water Samples of Industrial Areas

Single Step Synthesis of MoSe₂−MoO₃ Heterostructure for Highly Sensitive Amperometric Detection of Nitrite in Water Samples of Industrial Areas

Enhanced Potassium Ion Battery by Inducing Interlayer Anionic Ligands in MoS_1.5Se_0.5 Nanosheets with Exploration of the Mechanism

1T‐MoS₂ Enriched Hierarchical MoS₂/MoO₃ Produced by Phase Transformation for Efficient Hydrogen Evolution Reaction