Epitaxial MoS2 nanosheets on nitrogen doped graphite foam as a 3D electrode for highly efficient electrochemical hydrogen evolution

Liu, Bitao; Wang, Siwei; Mo, Qionghua; Peng, Lingling; Cao, Shixiu; Wang, Jun; Wu, Chengrong; Li, Chen; Guo, Jian; Liu, Biqiong; Chen, Wenbo; Lin, Yue

doi:10.1016/j.electacta.2018.09.160

Cited by 33 publications

(13 citation statements)

References 71 publications

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“…[10][11][12] However, the inherent large band gap of MoS 2 leads to poor electron transport, thus resulting al arge HER overpotential. With cost-effectiveness and high electrocatalytic performance, non-noblem etal molybdenum disulfide (MoS 2 )n anosheets have been extensively investigated as an efficient catalyst in HER.…”

Section: Introductionmentioning

confidence: 99%

“…With cost-effectiveness and high electrocatalytic performance, non-noblem etal molybdenum disulfide (MoS 2 )n anosheets have been extensively investigated as an efficient catalyst in HER. [10][11][12] However, the inherent large band gap of MoS 2 leads to poor electron transport, thus resulting al arge HER overpotential. Carbon materials with large surfacearea and rapid electron migration can effectively reduce HER overpotential of MoS 2 by forming ac arbon@MoS 2 combined system,w hen two materials are mutualistic symbiosis in one bulk material.…”

Section: Introductionmentioning

confidence: 99%

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Pore Surface Engineering of Covalent Triazine Frameworks@MoS₂ Electrocatalyst for the Hydrogen Evolution Reaction

Qiao

Zhang

et al. 2019

ChemSusChem

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Electrochemical water splitting is an important strategy for the mass production of hydrogen. Development of synthesizable catalysts has always been one of the biggest obstacles to replace platinum‐group catalysts. In this work, a high quality crystal polymer covalent triazine framework [CTF; Brunauer–Emmett–Teller (BET) surface area of 1562.6 m2 g−1] is synthesized and MoS2 nanoparticles are grown in situ into/onto the 1 D channel arrays or the external surface for electrocatalysis [hydrogen evolution reaction (HER)] . The state‐of‐the‐art CTFs@MoS2 structure exhibits superior catalytic kinetics with an overpotential of 93 mV and Tafel slope of 43 mV dec−1, which is improved over most other reported analogous catalysts. The inherent π‐conjugated crystal channels in CTFs provides a multifunctional support for electron transmission and mass diffusion during the hydrogen evolution process. Catalytic kinetics analysis shows that the HER performance is closely correlated to the hierarchical pore parameters and aggregated thickness of MoS2 nanoparticles. This work provides an attractive and durable alternative to synthesize high activity and stable catalysts for HER.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Pore Surface Engineering of Covalent Triazine Frameworks@MoS₂ Electrocatalyst for the Hydrogen Evolution Reaction

Qiao

Zhang

et al. 2019

ChemSusChem

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“…develop what are often indicated as 3D electrode. It must be noted, however, that papers dealing on 3D electrodes refer typically to batteries and analogous devices, or just indicate 3D-like materials, rather than really analyze their use under relevant conditions for electrocatalytic syntheses [73][74][75].…”

Section: Technical Hurdlesmentioning

confidence: 99%

Chemical engineering role in the use of renewable energy and alternative carbon sources in chemical production

2019

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There is a demand for new chemical reaction technologies and associated engineering aspects due to on-going transition in energy and chemistry associated to moving out progressively from the use of fossil fuels. Focus is given in this review on two main aspects: i) the development of alternative carbon sources and ii) the integration of renewable energy in the chemical production. It is shown how addressing properly these aspects requires to develop also a) new tools for chemical engineering assessment and b) innovative methodologies for the development of the materials, reactors and processes. This review evidences the need to accelerate studies on these directions, being a crucial element to catalyze the transition to a more sustainable use of energy and chemistry. It is remarked, however, the need to go beyond the traditional approaches, with some examples given. In fact, the presence of radical changes in the way of production is underlined, requiring thus novel fundamentals and applied engineering approaches.

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“…Theoretical studies have shown that along the edges of 2D MoS 2 nanosheets is the source of highly HER, which plays a crucial role in constructing hybrid catalyst [15,17,18]. Therefore, the development of MoS 2 based catalysts, featuring rich active edge sites [19] and accessible surface areas [20], is of vital significance to improve the overall efficiency for HER. Though many literatures have been reported the great potential of MoS 2 as HER electrocatalyst [3,21,22], the severe stacking of MoS 2 nanosheets during the preparation and electrochemical reaction process significantly impact its stability and hinders its application compared with Pt-based electrocatalysts [21,23].…”

Section: Introductionmentioning

confidence: 99%

In Situ Wet Etching of MoS2@dWO3 Heterostructure as Ultra-Stable Highly Active Electrocatalyst for Hydrogen Evolution Reaction

Liu

Wang

2020

Catalysts

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Electrocatalysts featuring robust structure, excellent catalytic activity and strong stability are highly desirable, but challenging. The rapid development of two-dimensional transition metal chalcogenide (such as WO3, MoS2 and WS2) nanostructures offers a hopeful strategy to increase the active edge sites and expedite the efficiency of electronic transport for hydrogen evolution reaction. Herein, we report a distinctive strategy to construct two-dimensional MoS2@dWO3 heterostructure nanosheets by in situ wet etching. Synthesized oxygen-incorporated MoS2-was loaded on the surface of defective WO3 square nanoframes with abundant oxygen vacancies. The resulting nanocomposite exhibits a low overpotential of 191 mV at 10 mA cm−2 and a very low Tafel slope of 42 mV dec−1 toward hydrogen evolution reaction. The long-term cyclic voltammetry cycling of 5000 cycles and more than 80,000 s chronoamperometry tests promises its outstanding stability. The intimate and large interfacial contact between MoS2 and WO3, favoring the charge transfer and electron–hole separation by the synergy of defective WO3 and oxygen-incorporated MoS2, is believed the decisive factor for improving the electrocatalytic efficiency of the nanocomposite. Moreover, the defective WO3 nanoframes with plentiful oxygen vacancies could serve as an anisotropic substrate to promote charge transport and oxygen incorporation into the interface of MoS2. This work provides a unique methodology for designing and constructing excellently heterostructure electrocatalysts for hydrogen evolution reaction.

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Epitaxial MoS2 nanosheets on nitrogen doped graphite foam as a 3D electrode for highly efficient electrochemical hydrogen evolution

Cited by 33 publications

References 71 publications

Pore Surface Engineering of Covalent Triazine Frameworks@MoS₂ Electrocatalyst for the Hydrogen Evolution Reaction

Pore Surface Engineering of Covalent Triazine Frameworks@MoS₂ Electrocatalyst for the Hydrogen Evolution Reaction

Chemical engineering role in the use of renewable energy and alternative carbon sources in chemical production

In Situ Wet Etching of MoS2@dWO3 Heterostructure as Ultra-Stable Highly Active Electrocatalyst for Hydrogen Evolution Reaction

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Epitaxial MoS2 nanosheets on nitrogen doped graphite foam as a 3D electrode for highly efficient electrochemical hydrogen evolution

Cited by 33 publications

References 71 publications

Pore Surface Engineering of Covalent Triazine Frameworks@MoS2 Electrocatalyst for the Hydrogen Evolution Reaction

Pore Surface Engineering of Covalent Triazine Frameworks@MoS2 Electrocatalyst for the Hydrogen Evolution Reaction

Chemical engineering role in the use of renewable energy and alternative carbon sources in chemical production

In Situ Wet Etching of MoS2@dWO3 Heterostructure as Ultra-Stable Highly Active Electrocatalyst for Hydrogen Evolution Reaction

Contact Info

Product

Resources

About

Pore Surface Engineering of Covalent Triazine Frameworks@MoS₂ Electrocatalyst for the Hydrogen Evolution Reaction

Pore Surface Engineering of Covalent Triazine Frameworks@MoS₂ Electrocatalyst for the Hydrogen Evolution Reaction