Wafer Scale Phase‐Engineered 1T‐ and 2H‐MoSe<sub>2</sub>/Mo Core–Shell 3D‐Hierarchical Nanostructures toward Efficient Electrocatalytic Hydrogen Evolution Reaction

Qu, Yindong; Medina, Henry; Wang, Sheng Wen; Wang, Yi Chung; Chen, Chia Wei; Su, Teng; Manikandan, Arumugam; Wang, Kuangye; Shih, Yu Chuan; Chang, Je Wei; Kuo, Hao‐Chung; Lee, Chi Yung; Lu, Shyue-Kung; Shen, Guozhen; Wang, Zhiming M.; Chueh, Yu‐Lun

doi:10.1002/adma.201602697

Cited by 222 publications

(176 citation statements)

References 41 publications

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“…[16] In contrast, the interplanar spacing of (002) plane of MoS 2 /RGO-200 is decreased to 0.62 nm. The decreased interlayer distance is due to the transition from 1T to 2H phase of MoS 2 , [17] supported by further Raman and X-ray photoelectron spectroscopy (XPS) analysis. Energy dispersive X-ray spectroscopy (EDX) and corresponding element mapping were conducted to analyze the composition of the MoS 2 /RGO composites.…”

Section: Resultsmentioning

confidence: 74%

Synthesis of Air‐stable 1T Phase of Molybdenum Disulfide for Efficient Electrocatalytic Hydrogen Evolution

et al. 2018

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Phase engineering of MoS2 from the thermodynamically stable 2H phase to the metastable 1T phase has been demonstrated as an effective way to enhance the electrocatalytic activity for hydrogen evolution reaction (HER). However, the development of highly stable and efficient 1T‐MoS2‐based electrocatalysts toward HER still remains a great challenge. Herein, a facile hydrothermal strategy was introduced for the preparation of stable 1T‐MoS2 via a reduced graphene oxide (RGO)‐assisted process. The optimal catalyst of MoS2/RGO can keep highly stable in air over 90 days without significant activity fading due to Mo−O interactions, which effectively prevent the transformation of 1T phase back to 2H. The catalyst affords superior HER catalytic activity with a low overpotential of 213 mV versus reversible hydrogen electrode (RHE) at a current density of −10 mA cm−2, a small Tafel slope of 43 mV dec−1, a high exchange current density of 0.83 mA cm−2, and excellent durability, which outperforms its corresponding 2H counterpart. The enhanced electrocatalytic activity of the optimal MoS2/RGO sample is associated with the RGO, which can not only facilitate charge transfer along MoS2 nanosheets but also stabilize the 1T‐MoS2 with a high exposure of active sites for HER. This work paves a new pathway for designing highly efficient MoS2‐based electrocatalysts through phase engineering.

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Section: Resultsmentioning

confidence: 74%

Synthesis of Air‐stable 1T Phase of Molybdenum Disulfide for Efficient Electrocatalytic Hydrogen Evolution

et al. 2018

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“…The low HER overpotential at a current density of 10 mA cm –2 for the Fe 1.89 Mo 4.11 O 7 /MoO 2 catalyst is also comparable to the values reported for most Mo-related HER catalysts in acidic aqueous media, such as MoS 2 /RGO (140 mV for 10 mA cm –2 ), MoO 3 /MoS 2 (250 mV for 10 mA cm –2 ), MoSe 2 /Mo (166 mV for 10 mA cm –2 ), etc. 15 (Table S2†). Similarly, the Tafel plots depicted in Fig.…”

Section: Resultsmentioning

confidence: 99%

A bimetallic oxide Fe_1.89Mo_4.11O₇ electrocatalyst with highly efficient hydrogen evolution reaction activity in alkaline and acidic media

et al. 2018

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“…[3] Pt-based electrocatalysts have shown the highestp erformance towards the hydrogen evolution reaction( HER) process with almost no overpotential and robust stability, but its rarity and the high cost limit the practical application. [4,5] Non-Pt electrocatalysts, particularly the transition-metal compounds, including metal phosphides, [6][7][8][9][10] sulfides, [11,12] selenides, [13,14] carbides, [15] borides, [16] and nitrides [17] have increasingly aroused attention.U nfortunately, most of them have no Pt-like activity or only favorable activity in acid media. Considering the different environments in application, developing catalysts with outstanding catalytic per-formance andh igh stabilityi np H-universal solutions is an urgent need.…”

Section: Introductionmentioning

confidence: 99%

Optimization of the Hydrogen‐Adsorption Free Energy of Ru‐Based Catalysts towards High‐Efficiency Hydrogen Evolution Reaction at all pH

Cheng

Geng

Yang

et al. 2019

Chemistry A European J

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The utilization of noble‐metal catalysts for the hydrogen evolution reaction (HER) provides an efficient strategy for hydrogen acquisition. However, exploring catalysts with suitable hydrogen binding strength for the HER process is always of great importance, but extremely challenging. In this work, sulfur and phosphor as electron‐withdrawing elements were incorporated into carbon nanotube (CNT)‐supported Ru catalysts, which were prepared through a facile solution reduction reaction and post thermo treatment. Owing to the suitable electronegativity provided by P and synergistic effects of the carbon nanotubes, the RuP2/CNT achieved a high catalytic performance as a HER electrocatalyst. This may result from the modulation effect of the electronic properties and the depressed adsorption free energy of RuP2. Electrochemical tests present that the RuP2/CNT composite exhibit a small overpotential of 58 mV at 10 mA cm−2 in acidic electrolyte. In a neutral or alkaline environment, the overpotential is 82 and 40 mV, respectively. The RuP2/CNT electrode also possesses stable durability for long‐time cycling, suggesting its remarkable property as promising all‐pH HER catalyst.

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Wafer Scale Phase‐Engineered 1T‐ and 2H‐MoSe₂/Mo Core–Shell 3D‐Hierarchical Nanostructures toward Efficient Electrocatalytic Hydrogen Evolution Reaction

Cited by 222 publications

References 41 publications

Synthesis of Air‐stable 1T Phase of Molybdenum Disulfide for Efficient Electrocatalytic Hydrogen Evolution

Synthesis of Air‐stable 1T Phase of Molybdenum Disulfide for Efficient Electrocatalytic Hydrogen Evolution

A bimetallic oxide Fe_1.89Mo_4.11O₇ electrocatalyst with highly efficient hydrogen evolution reaction activity in alkaline and acidic media

Optimization of the Hydrogen‐Adsorption Free Energy of Ru‐Based Catalysts towards High‐Efficiency Hydrogen Evolution Reaction at all pH

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Wafer Scale Phase‐Engineered 1T‐ and 2H‐MoSe2/Mo Core–Shell 3D‐Hierarchical Nanostructures toward Efficient Electrocatalytic Hydrogen Evolution Reaction

Cited by 222 publications

References 41 publications

Synthesis of Air‐stable 1T Phase of Molybdenum Disulfide for Efficient Electrocatalytic Hydrogen Evolution

Synthesis of Air‐stable 1T Phase of Molybdenum Disulfide for Efficient Electrocatalytic Hydrogen Evolution

A bimetallic oxide Fe1.89Mo4.11O7 electrocatalyst with highly efficient hydrogen evolution reaction activity in alkaline and acidic media

Optimization of the Hydrogen‐Adsorption Free Energy of Ru‐Based Catalysts towards High‐Efficiency Hydrogen Evolution Reaction at all pH

Contact Info

Product

Resources

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Wafer Scale Phase‐Engineered 1T‐ and 2H‐MoSe₂/Mo Core–Shell 3D‐Hierarchical Nanostructures toward Efficient Electrocatalytic Hydrogen Evolution Reaction

A bimetallic oxide Fe_1.89Mo_4.11O₇ electrocatalyst with highly efficient hydrogen evolution reaction activity in alkaline and acidic media