Eutectoid-structured WC/W2C heterostructures: A new platform for long-term alkaline hydrogen evolution reaction at low overpotentials

Chen, Zhigang; Gong, Wenbin; Cong, Shan; Wang, Zhen; Song, Ge; Pan, Ting; Tang, Xueqing; Chen, Jian; Lu, Weibang; Zhao, Zhigang

doi:10.1016/j.nanoen.2019.104335

Cited by 106 publications

(70 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Furthermore, Wang et al [27] fabricated W x C@WS 2 heterostructure via carbonizing WS 2 nanotubes, which produced the overpotential of 146 mV at 10 mA cm −2 and Tafel slope of 61 mV dec −1 . Chen et al [28] also claimed the Tafel slope of 59 mV dec −1 with overpotential of 75 mV at 10 mA cm −2 in alkaline medium for a novel eutectoid-structured WC/W 2 C heterostructure. The detailed literatures are suggested to combine the W 2 C and WS 2 and thereby to progress the electronic and electrochemical properties of resulted hybrid material.…”

Section: Introductionmentioning

confidence: 96%

One-Pot Synthesis of W2C/WS2 Hybrid Nanostructures for Improved Hydrogen Evolution Reactions and Supercapacitors

et al. 2020

View full text Add to dashboard Cite

Tungsten sulfide (WS2) and tungsten carbide (W2C) are materialized as the auspicious candidates for various electrochemical applications, owing to their plentiful active edge sites and better conductivity. In this work, the integration of W2C and WS2 was performed by using a simple chemical reaction to form W2C/WS2 hybrid as a proficient electrode for hydrogen evolution and supercapacitors. For the first time, a W2C/WS2 hybrid was engaged as a supercapacitor electrode and explored an incredible specific capacitance of ~1018 F g−1 at 1 A g−1 with the outstanding robustness. Furthermore, the constructed symmetric supercapacitor using W2C/WS2 possessed an energy density of 45.5 Wh kg−1 at 0.5 kW kg−1 power density. For hydrogen evolution, the W2C/WS2 hybrid produced the low overpotentials of 133 and 105 mV at 10 mA cm−2 with the small Tafel slopes of 70 and 84 mV dec−1 in acidic and alkaline media, respectively, proving their outstanding interfaced electrocatalytic characteristics. The engineered W2C/WS2-based electrode offered the high-performance for electrochemical energy applications.

show abstract

Section: Introductionmentioning

confidence: 96%

One-Pot Synthesis of W2C/WS2 Hybrid Nanostructures for Improved Hydrogen Evolution Reactions and Supercapacitors

et al. 2020

View full text Add to dashboard Cite

show abstract

“…The samples showed two peaks at 351.5 and 415.2 cm −1 corresponding to the in-plane mode vibration E 1 2g and out-plane mode vibration A 1g of WS 2 , respectively [ 2 , 36 ]. Moreover, the peaks detected at 700 and 805 cm −1 can be attributed to the stretching modes of W−C [ 26 , 37 ]. The D- and G-bands corresponding to the sp 3 and sp 2 carbon atoms in W 2 C were observed at 1200–1700 cm −1 .…”

Section: Resultsmentioning

confidence: 99%

“…Tungsten metal compounds such as oxides, chalcogenides, and carbides are used in a wide range of applications such as catalysis, energy conversion, and energy storage [ 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 ]. Feng et al prepared WS 2 nanoflakes with a high reversible capacity of 680 mAh g −1 for 20 cycles as anode materials for LIBs [ 27 ].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

W2C/WS2 Alloy Nanoflowers as Anode Materials for Lithium-Ion Storage

Nguyen

Kim

2020

Nanomaterials

View full text Add to dashboard Cite

Recently, composites of MXenes and two-dimensional transition metal dichalcogenides have emerged as promising materials for energy storage applications. In this study, W2C/WS2 alloy nanoflowers (NFs) were prepared by a facile hydrothermal method. The alloy NFs showed a particle size of 200 nm–1 μm, which could be controlled. The electrochemical performance of the as-prepared alloy NFs was investigated to evaluate their potential for application as lithium-ion battery (LIB) anodes. The incorporation of W2C in the WS2 NFs improved their electronic properties. Among them, the W2C/WS2_4h NF electrode showed the best electrochemical performance with an initial discharge capacity of 1040 mAh g−1 and excellent cyclability corresponding to a reversible capacity of 500 mAh g−1 after 100 cycles compared to that of the pure WS2 NF electrode. Therefore, the incorporation of W2C is a promising approach to improve the performance of LIB anode materials.

show abstract

“…To date, state‐of‐the‐art electrocatalysts for the HER are noble metal Pt catalysts, the performance of which is attributable to their optimal hydrogen adsorption free energy [8] . However, their extensive practical applicability is hindered by high costs and scarcity [9] . Hence, the development of highly efficient and cost‐effective electrocatalysts is urgently required for sustainable, large‐scale hydrogen production.…”

Section: Introductionmentioning

confidence: 99%

The Heterostructure of Ru₂P/WO₃/NPC Synergistically Promotes H₂O Dissociation for Improved Hydrogen Evolution

et al. 2020

View full text Add to dashboard Cite

Facilitating the dissociation of water and desorption of hydrogen are both crucial challenges for improving the hydrogen evolution reaction (HER) in alkaline media. Herein, we report the synthesis of heterostructure of Ru2P/WO3@NPC (N, P co‐doped carbon) by a simple hydrothermal reaction using ruthenium and tungsten salts as precursors, followed by pyrolyzing under an Ar atmosphere. The Ru2P/WO3@NPC electrocatalyst exhibits an outstanding HER activity with an overpotential of 15 mV at a current density of 10 mA cm−2 and excellent durability in a 1.0 M KOH solution, outperforming state‐of‐the‐art Pt/C and most reported electrocatalysts. Experimental results combined with density functional calculations reveal that the electron density redistribution in Ru2P/WO3@NPC is achieved by electron transfer from NPC to Ru2P/WO3 and from Ru2P to WO3, which directly promotes the dissociation of water on W sites in WO3 and desorption of hydrogen on Ru sites in Ru2P.

show abstract

Eutectoid-structured WC/W2C heterostructures: A new platform for long-term alkaline hydrogen evolution reaction at low overpotentials

Cited by 106 publications

References 52 publications

One-Pot Synthesis of W2C/WS2 Hybrid Nanostructures for Improved Hydrogen Evolution Reactions and Supercapacitors

One-Pot Synthesis of W2C/WS2 Hybrid Nanostructures for Improved Hydrogen Evolution Reactions and Supercapacitors

W2C/WS2 Alloy Nanoflowers as Anode Materials for Lithium-Ion Storage

The Heterostructure of Ru₂P/WO₃/NPC Synergistically Promotes H₂O Dissociation for Improved Hydrogen Evolution

Contact Info

Product

Resources

About

Eutectoid-structured WC/W2C heterostructures: A new platform for long-term alkaline hydrogen evolution reaction at low overpotentials

Cited by 106 publications

References 52 publications

One-Pot Synthesis of W2C/WS2 Hybrid Nanostructures for Improved Hydrogen Evolution Reactions and Supercapacitors

One-Pot Synthesis of W2C/WS2 Hybrid Nanostructures for Improved Hydrogen Evolution Reactions and Supercapacitors

W2C/WS2 Alloy Nanoflowers as Anode Materials for Lithium-Ion Storage

The Heterostructure of Ru2P/WO3/NPC Synergistically Promotes H2O Dissociation for Improved Hydrogen Evolution

Contact Info

Product

Resources

About

The Heterostructure of Ru₂P/WO₃/NPC Synergistically Promotes H₂O Dissociation for Improved Hydrogen Evolution