Shell-core MoS2 nanosheets@Fe3O4 sphere heterostructure with exposed active edges for efficient electrocatalytic hydrogen production

Zhang, Xiao; Ding, Peng; Sun, Yanfang; Wang, Yansen; Wu, Yanhua; Guo, Jinxue

doi:10.1016/j.jallcom.2017.04.315

Cited by 40 publications

(11 citation statements)

References 34 publications

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“…Thus, the broadening of these peaks indicates small crystal sizes in those planes, which implies that the bulk MoS 2 material was exfoliated into nanosheets. These results are similar to other synthesized MoS 2 nanosheets by bottom-up methods such as hydrothermal method and hot injection method [ 34 , 35 , 36 , 37 ]. The appearance of Ag peaks for the (111) and (200) planes confirms the successful reduction of AgNO 3 into Ag nanoparticles.…”

Section: Resultssupporting

confidence: 87%

Ag Nanoparticle-Decorated MoS2 Nanosheets for Enhancing Electrochemical Performance in Lithium Storage

Nguyen

Kim

2021

Nanomaterials

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Metallic phase 1T MoS2 is a well-known potential anode for enhancing the electrochemical performance of lithium-ion batteries owing to its mechanical/chemical stability and high conductivity. However, during the lithiation/delithiation process, MoS2 nanosheets (NSs) tend to restack to form bulky structures that deteriorate the cycling performance of bare MoS2 anodes. In this study, we prepared Ag nanoparticle (NP)-decorated 1T MoS2 NSs via a liquid exfoliation method with lithium intercalation and simple reduction of AgNO3 in NaBH4. Ag NPs were uniformly distributed on the MoS2 surface with the assistance of 3-mercapto propionic acid. Ag NPs with the size of a few nanometers enhanced the conductivity of the MoS2 NS and improved the electrochemical performance of the MoS2 anode. Specifically, the anode designated as Ag3@MoS2 (prepared with AgNO3 and MoS2 in a weight ratio of 1:10) exhibited the best cycling performance and delivered a reversible specific capacity of 510 mAh·g−1 (approximately 73% of the initial capacity) after 100 cycles. Moreover, the rate performance of this sample had a remarkable recovery capacity of ~100% when the current decreased from 1 to 0.1 A·g−1. The results indicate that the Ag nanoparticle-decorated 1T MoS2 can be employed as a high-rate capacity anode in lithium-ion storage applications.

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Section: Resultssupporting

confidence: 87%

Ag Nanoparticle-Decorated MoS2 Nanosheets for Enhancing Electrochemical Performance in Lithium Storage

Nguyen

Kim

2021

Nanomaterials

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“…The high electrical conductivity promotes the rapid electron transport while the porous structures facilitate fast mass diffusion. There are a variety of TMO‐based heterostructures reported as electrocatalysts for acidic HER . Most of them possess core–shell structures with a TMO core and a HER‐active shell (Figure d–i) in which the active shell will shield the TMO core from corrosion, resulting in improved durability.…”

Section: Heterostructured Catalysts For Hermentioning

confidence: 99%

“…Copyright 2017, Elsevier Ltd. f) TEM image of MoS 2 /Fe 3 O 4 heterostructure. Reproduced with permission . Copyright 2017, Elsevier Ltd. g) TEM image of MoO x /MoS 2 core–shell structure (annealed in H 2 S at 500 °C for 2 min).…”

Section: Heterostructured Catalysts For Hermentioning

confidence: 99%

Heterostructures for Electrochemical Hydrogen Evolution Reaction: A Review

Zhao

Rui

Dou

et al. 2018

Adv Funct Materials

1,061

708

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Developing sustainable and renewable energy sources along with efficient energy storage and conversion technologies is vital to address environmental and energy challenges. Electrochemical water splitting coupling with gridscale renewable energy harvesting technologies is becoming one of the most promising approaches. Besides, hydrogen with the highest mass-energy density of any fuel is regarded as the ultimate clean energy carrier. The realization of practical water splitting depends heavily on the development of low-cost, highly active, and durable catalysts for hydrogen evolution reactions (HERs) and oxygen evolution reactions (OERs). Recently, heterostructured catalysts, which are generally composed of electrochemical active materials and various functional additives, have demonstrated extraordinary electrocatalytic performance toward HER and OER, and particularly a number of precious-metalfree heterostructures delivered comparable activity with precious-metal-based catalysts. Herein, an overview is presented of recent research progress on heterostructured HER catalysts. It starts with summarizing the fundamentals of HER and approaches for evaluating HER activity. Then, the design and synthesis of heterostructures, electrochemical performance, and the related mechanisms for performance enhancement are discussed. Finally, the future opportunities and challenges are highlighted for the development of heterostructured HER catalysts from the points of view of both fundamental understandings and practical applications.

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“…The standard ImageJ software was used to analyze the FESEM images of the samples. Figure 1 a shows the FESEM image, which depicts the MoS 2 nanospheres that have been produced through the hierarchical agglomeration of MoS 2 nanosheets [ 33 ]. The spherical structures obtained through nanosheet collection showed a sheet diameter in the range from (8–16) nm, as shown in the inset of Figure 1 a.…”

Section: Resultsmentioning

confidence: 99%

Synthesis of Molybdenum Sulfide/Tellurium Hetero-Composite by a Simple One-Pot Hydrothermal Technique for High-Performance Supercapacitor Electrode Material

et al. 2021

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It is necessary to investigate effective energy storage devices that can fulfill the requirements of short-term and long-term durable energy outputs. Here, we report a simple one-pot hydrothermal technique through which to fabricate the MoS2/Te nanocomposite to be used as an effective electrode material for high-performance supercapacitors. Comprehensive characterization of the as-fabricated nanomaterial was performed using FESEM, HRTEM, XRD, FTIR, XPS, etc., as well as electrochemical characterizations. The electrochemical characterization of the as-fabricated nanocomposite electrode material showed a high specific capacitance of 402.53 F g−1 from a galvanostatic charge-discharge (GCD) profile conducted at 1 A g−1 current density. The electrode material also showed significant rate performance with high cyclic stability reaching up to 92.30% under 4000 cycles of galvanostatic charge-discharge profile at a current density of 10 A g−1. The highly encouraging results obtained using this simple synthetic approach demonstrate that the hetero-structured nanocomposite of MoS2/Te electrode material could serve as a promising composite to use in effective supercapacitors or energy storage devices.

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Shell-core MoS2 nanosheets@Fe3O4 sphere heterostructure with exposed active edges for efficient electrocatalytic hydrogen production

Cited by 40 publications

References 34 publications

Ag Nanoparticle-Decorated MoS2 Nanosheets for Enhancing Electrochemical Performance in Lithium Storage

Ag Nanoparticle-Decorated MoS2 Nanosheets for Enhancing Electrochemical Performance in Lithium Storage

Heterostructures for Electrochemical Hydrogen Evolution Reaction: A Review

Synthesis of Molybdenum Sulfide/Tellurium Hetero-Composite by a Simple One-Pot Hydrothermal Technique for High-Performance Supercapacitor Electrode Material

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