Hierarchical heterostructured nickle foam–supported Co3S4 nanorod arrays embellished with edge-exposed MoS2 nanoflakes for enhanced alkaline hydrogen evolution reaction

Peng, Ouwen; Shi, Run; Wang, Jingwei; Zhang, Xian; Miao, Jun; Zhang, Linfei; Yang, Fu; Madhusudan, Puttaswamy; Li, Kai; Amini, Abbas; Cheng, Chun

doi:10.1016/j.mtener.2020.100513

Cited by 37 publications

(24 citation statements)

References 56 publications

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“…Hydrogen is an attractive energy because its oxidation product is water and it would reduce greenhouse gas emissions . Electrocatalytic water splitting to produce clean hydrogen has a big energy barrier and requires a catalyst to accelerate the sluggish kinetic rate. − At present, noble-metal-based nanostructures show great promise as high-performance electrocatalysts toward the hydrogen evolution reaction (HER), but its widespread utilization has been seriously restricted by the elemental scarcity and high price. − Therefore, it is highly desired to develop robust and highly active noble-metal-free electrocatalysts for high-efficiency hydrogen production.…”

Section: Introductionmentioning

confidence: 99%

Heterostructured MoSe₂/Oxygen-Terminated Ti₃C₂ MXene Architectures for Efficient Electrocatalytic Hydrogen Evolution

et al. 2021

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atomically thin transition metal dichalcogenide MoSe 2 has been identified as one of the highly active noble-metal-free catalysts for the electrocatalytic hydrogen evolution reaction (HER), owing to its excellent electronic property and rich active sites. However, the electrocatalytic hydrogen-evolving activity is still hindered by its moderate conductivity, arising from semiconducting property and the thermodynamically stable basal plane. It is anticipated that the integration of 2D MoSe 2 nanosheets with a highly conductive largearea 2D substrate enables the accelerated interfacial electron transfer and the enhanced HER performance. We report herein a facile and scalable fabrication of 2D MoSe 2 /2D Ti 3 C 2 MXene heterostructured architecture, where the layered MoSe 2 nanosheets are in situ decorated on the exfoliated oxygen-terminated Ti 3 C 2 MXene flakes. In comparison to pristine MoSe 2 and the MoSe 2 /unmodified Ti 3 C 2 MXene hybrids, the composite electrocatalysts of MoSe 2 nanosheets and oxygen-terminated Ti 3 C 2 MXene exhibited improved HER activities, owing to higher electrochemically active surface areas, an oxygen-substituted surface, and the synergy effect between nanosized MoSe 2 and oxygen-terminated MXene nanosheets. This study serves to promote continuous efforts toward low-cost, highperformance HER electrocatalysts by taking advantage of merits of transition metal dichalcogenides and 2D nanostructures.

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Section: Introductionmentioning

confidence: 99%

Heterostructured MoSe₂/Oxygen-Terminated Ti₃C₂ MXene Architectures for Efficient Electrocatalytic Hydrogen Evolution

et al. 2021

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“…[11] Moreover, their layer number for the application of electrocatalysis is usually more than five in powder form or one in microdevices. [31,32] So far, there has been no systematic investigation on strained MoS 2 catalysts that considers both the strain dimension and layer-number effect to the catalyst performance.…”

Section: Introductionmentioning

confidence: 99%

Biaxially Strained MoS₂ Nanoshells with Controllable Layers Boost Alkaline Hydrogen Evolution

Zhang

Liu

et al. 2022

Advanced Materials

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alternatives to noble metal-based electrocatalysts for the hydrogen evolution reaction (HER). [2] Since the discovery of the highly active nature of the edge sites (hydrogen adsorption free energy on edge sites of MoS 2 is 0.06 eV), [3] enormous efforts have been made to fabricate MoS 2 nanostructures with maximized edge sites. [4][5][6] However, the HER performance of MoS 2 is still far from being satisfactory, mainly due to the limited exposure of active sites in the inert basal plane and significant mobility reduction of carriers. [4] To boost the HER activity, it is therefore desirable to activate the basal plane and enhance the conductivity. The phase transformation from 2H to the conductive 1T provides a new pathway to dramatically enhance the HER activity for TMDs, but this phase transition strategy generally requires critical condition and the metallic 1T-phase is thermodynamically less stable than the semiconducting 2H phase. [7] Very recently, nanomaterials with highly curved surfaces have been proved effective in energy-related reactions benefited from the inherent tensile strain and enhanced local electric field. [8][9][10] Introducing tensile strain into MoS 2 can favor the generation of sulfur vacancies as active sites to unlock the inert plane. [11] However, the tensile strain in TMDs, which is usually inherited from deformed flexible substrates or patterned rigid substrates via mechanical transfer process, is distributed in the uniaxial direction. The uniaxial strain generated in this way is insufficient to tune the S vacancies and also not applicable to nanostructured catalysts. [12][13][14] In addition, the layer number also influences their electronic structure and subsequently the catalytic performance. [15][16][17][18] In fact, the catalyst reactions take place primarily at the outer layer of TMDs due to the difficulty in electron and reactive ion transport from the surface to the inner space. [16,17] For example, Cao group demonstrated that the HER catalytic activity of MoS 2 atomically thin films decreases by a factor of ≈4.47 for the addition of each layer because of increased charge transfer barrier. [17] Another work shows that the optical band gap of MoS 2 is approximately linear with strain, ≈45 meV % −1 strain for monolayer MoS 2 and ≈120 meV % −1 strain for bilayer MoS 2 , demonstrating that bilayer is more sensitive to the tensile strain than the monolayer. [19] So far, there has been no report on biaxially strained MoS 2 with accurate atomic layers and the effect to catalytic activity.Apart from the efforts of activating the basal plane, enhancing the electronic conductivity of TMDs is also mandatory for the Strain in layered transition-metal dichalcogenides (TMDs) is a type of effective approach to enhance the catalytic performance by activating their inert basal plane. However, compared with traditional uniaxial strain, the influence of biaxial strain and the TMD layer number on the local electronic configuration remains unexplored. Herein, via a new in situ self-vulcanization st...

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“…Recently, transition-metal dichalcogenides (TMDs), such as MoS 2 , WS 2 , MoSe 2 , WSe 2 , etc., have been widely applied in the fields of electronics, sensors, and catalysis due to its intriguing chemical and electronic properties. − Among TMDs, MoS 2 nanosheets have received widespread attention in the field of electrocatalysis because of their S-edges with optimal hydrogen adsorption Gibbs free energy (Δ G H * = 0.06 eV), which is close to 0 eV. − However, most of the reported MoS 2 catalysts belong to the 2H phase, which is a semiconductor with a narrow band gap of about 1.3 eV. The weak conductivity of MoS 2 hindered its wide application in electrocatalysis. , Therefore, it is necessary to modify MoS 2 to improve its electrocatalytic performance.…”

Section: Introductionmentioning

confidence: 99%

Modulating the Electronic Properties of MoS₂ Nanosheets for Electrochemical Hydrogen Production: A Review

Sun

Meng

2021

ACS Appl. Nano Mater.

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Benefiting from the low cost and excellent stability, transition metal dichalcogenides (TMDs) have been widely applied in electrocatalysis for hydrogen evolution. As a member of TMDs, molybdenum disulfide (MoS 2 ) nanosheets exhibited excellence because of their S-edges with near optimal hydrogen adsorption free energy. However, the performance of MoS 2 is affected by the inert basal surface and poor electron transfer ability. Various strategies have been reported. In this review, we systematically summarize the recent progress in regulating electronic structures of MoS 2 for electrochemical hydrogen production and focus on the relationship between the intrinsic electronic structure and its electrocatalytic activity. We close this review with the challenges and outlook on MoS 2 nanosheets as efficient and low-cost electrocatalysts, thereby providing helpful guidance for feasible design of efficient MoS 2 -based electrocatalysts for hydrogen production.

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Hierarchical heterostructured nickle foam–supported Co3S4 nanorod arrays embellished with edge-exposed MoS2 nanoflakes for enhanced alkaline hydrogen evolution reaction

Cited by 37 publications

References 56 publications

Heterostructured MoSe₂/Oxygen-Terminated Ti₃C₂ MXene Architectures for Efficient Electrocatalytic Hydrogen Evolution

Heterostructured MoSe₂/Oxygen-Terminated Ti₃C₂ MXene Architectures for Efficient Electrocatalytic Hydrogen Evolution

Biaxially Strained MoS₂ Nanoshells with Controllable Layers Boost Alkaline Hydrogen Evolution

Modulating the Electronic Properties of MoS₂ Nanosheets for Electrochemical Hydrogen Production: A Review

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Hierarchical heterostructured nickle foam–supported Co3S4 nanorod arrays embellished with edge-exposed MoS2 nanoflakes for enhanced alkaline hydrogen evolution reaction

Cited by 37 publications

References 56 publications

Heterostructured MoSe2/Oxygen-Terminated Ti3C2 MXene Architectures for Efficient Electrocatalytic Hydrogen Evolution

Heterostructured MoSe2/Oxygen-Terminated Ti3C2 MXene Architectures for Efficient Electrocatalytic Hydrogen Evolution

Biaxially Strained MoS2 Nanoshells with Controllable Layers Boost Alkaline Hydrogen Evolution

Modulating the Electronic Properties of MoS2 Nanosheets for Electrochemical Hydrogen Production: A Review

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Product

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Heterostructured MoSe₂/Oxygen-Terminated Ti₃C₂ MXene Architectures for Efficient Electrocatalytic Hydrogen Evolution

Heterostructured MoSe₂/Oxygen-Terminated Ti₃C₂ MXene Architectures for Efficient Electrocatalytic Hydrogen Evolution

Biaxially Strained MoS₂ Nanoshells with Controllable Layers Boost Alkaline Hydrogen Evolution

Modulating the Electronic Properties of MoS₂ Nanosheets for Electrochemical Hydrogen Production: A Review