Colloidal synthesis of 1T' phase dominated WS2 towards endurable electrocatalysis

Liu, Zhengqing; Li, Na; Su, Cong; Zhao, Hongyang; Xu, Lingling; Yin, Zongyou; Ju, Li; Du, Yaping

doi:10.1016/j.nanoen.2018.05.019

Cited by 136 publications

(121 citation statements)

References 25 publications

Supporting

Mentioning

110

Contrasting

Order By: Relevance

“…[29] In another report, Liu et al have made 1T-WS 2 using colloidal method which was efficient in catalysing HER at low overpotential than of its counterpart 2H-WS 2 . [30] Vertical array of 1T-MoS 2 flakes on carbon fibre cloth showed superior electrocatalytic activity towards HER which requires an overpotential of 151 mV to reach a current density of 10 mA/cm 2 . [31] Another approach to develop 1T-MoS 2 is through intercalation of organic molecules.…”

Section: Introductionmentioning

confidence: 97%

Ionic Liquid‐Intercalated Metallic MoS₂ as a Superior Electrode for Energy Storage Applications

et al. 2020

View full text Add to dashboard Cite

The development of MoS2 in the metallic phase (1T‐MoS2) is of paramount interest as it exhibits superior electrochemical activities compared to its semiconducting polymorph (2H‐MoS2). In this work, an ionic liquid (IL)‐assisted solvothermal method was employed to produce the thermodynamically metastable 1T‐MoS2. Structural characterization of the material suggests the intercalation of the IL into MoS2. De‐intercalation of ILs from 1T‐MoS2 leads to the formation of 2H‐MoS2. Carbon cloth‐supported 1T‐MoS2(1T‐MoS2@CC) shows higher electrocatalytic activity towards acidic hydrogen evolution reaction (HER) by delivering a current density of 50 mA/cm2 at an overpotential of 210 mV whereas 2H‐MoS2@CC requires an overpotential of 260 mV to reach the same current density. In addition, the 1T‐MoS2@CC electrode delivers a high electrochemical double‐layer storage ability compared to 2H‐MoS2@CC in 1 M Na2SO4. The enhanced electrochemical activity of 1T‐MoS2 over 2H‐MoS2 may be due to the existence of conducting basal planes and the high interlayer spacing (about 1 nm) caused by the intercalation of ILs into the MoS2 layers.

show abstract

Section: Introductionmentioning

confidence: 97%

Ionic Liquid‐Intercalated Metallic MoS₂ as a Superior Electrode for Energy Storage Applications

et al. 2020

View full text Add to dashboard Cite

show abstract

“…[20][21][22][23][24] Particularly, these tungsten compounds are potential substitutes for precious Pt in HER because of their similar electronic structures. [28][29][30] In contrast, less attention has been devoted to investigatingt he HER activity of tungsten-based carbides and nitrides.H owever,i nr ecent years, they have been reported as HER catalysts with high activity, and W-based carbides even displayed superior activity towards HER. [28][29][30] In contrast, less attention has been devoted to investigatingt he HER activity of tungsten-based carbides and nitrides.H owever,i nr ecent years, they have been reported as HER catalysts with high activity, and W-based carbides even displayed superior activity towards HER.…”

Section: Introductionmentioning

confidence: 99%

“…[25][26][27] Amongt ungsten compounds, tungsten-based sulfides have been widely investigated as active HER catalysts. [28][29][30] In contrast, less attention has been devoted to investigatingt he HER activity of tungsten-based carbides and nitrides.H owever,i nr ecent years, they have been reported as HER catalysts with high activity, and W-based carbides even displayed superior activity towards HER. [31][32][33][34] Therefore, these tungsten compounds with excellent HER activity couldb e used as cocatalysts to improvep hotocatalytic hydrogen evolution.…”

Section: Introductionmentioning

confidence: 99%

WX_y/g‐C₃N₄ (WX_y=W₂C, WS₂, or W₂N) Composites for Highly Efficient Photocatalytic Water Splitting

et al. 2019

View full text Add to dashboard Cite

The development of earth‐abundant, economical, and efficient photocatalysts to boost water splitting is a key challenge for the practical large‐scale application of hydrogen energy. In this study, g‐C3N4 loaded with different tungsten compounds (W2C, WS2, and W2N) is found to exhibit enhanced photocatalytic activities. W2C/g‐C3N4 displays the highest activity for the photocatalytic reaction with a H2 evolution rate of up to 98 μmol h−1, as well as remarkable recycling stability. The excellent photocatalytic activity of W2C/g‐C4N3 is attributed to the suitable band alignment in W2C/g‐C4N3 and high HER activity of the W2C cocatalyst, which promotes the separation and transfer of carriers and hydrogen evolution at the surface. These findings demonstrate that the tungsten carbide cocatalyst is more active for the photocatalytic reaction than the sulfide or nitride, paving a way for the design of novel and efficient carbides as cocatalysts for photocatalysis.

show abstract

“…In addition, (004) new and (006) new peaks were observed between 16° and 30°, which are consistent to that of previous reports. [ 14,34b ]…”

Section: Resultsmentioning

confidence: 99%

Metallic 1T Phase Tungsten Disulfide Microflowers for Trace Level Detection of Hg²⁺ Ions

Rahman

Maruf

Faisal

et al. 2020

Advanced Sustainable Systems

View full text Add to dashboard Cite

Electrochemical sensors for mercury ion detection would ideally demonstrate wide linear detection ranges (LDRs), ultratrace sensitivity, and high selectivity. This work presents an electrochemical sensor based on metallic 1T phase tungsten disulfide (WS2) microflowers for the detection of trace levels of Hg2+ ions with wide LDRs, ultratrace sensitivity, and high selectivity. Under optimized conditions, the sensor shows excellent sensitivities for Hg2+ with LDRs of 1 nm–1 µm and 0.1–1 mm. In addition to this, the limit of detection of the sensor toward Hg2+ is 0.0798 nm or 79.8 pm, which is well below the guideline value recommended by the World Health Organization. The sensor exhibits excellent selectivity for Hg2+ against other heavy metal ions including Cu2+, Fe3+, Ni2+, Pb2+, Cr3+, K+, Na+, Ag+, Sn2+, and Cd2+. The thus‐obtained excellent sensitivity and selectivity with wide LDRs can be attributed to the high conductivity, large surface area microflower structured 1T‐WS2, and the complexation of Hg2+ ions with S2−. In addition to good repeatability, reproducibility, and stability, this sensor shows the practical feasibility of Hg2+ detection in tap water suggesting a promising device for real applications.

show abstract

Colloidal synthesis of 1T' phase dominated WS2 towards endurable electrocatalysis

Cited by 136 publications

References 25 publications

Ionic Liquid‐Intercalated Metallic MoS₂ as a Superior Electrode for Energy Storage Applications

Ionic Liquid‐Intercalated Metallic MoS₂ as a Superior Electrode for Energy Storage Applications

WX_y/g‐C₃N₄ (WX_y=W₂C, WS₂, or W₂N) Composites for Highly Efficient Photocatalytic Water Splitting

Metallic 1T Phase Tungsten Disulfide Microflowers for Trace Level Detection of Hg²⁺ Ions

Contact Info

Product

Resources

About

Colloidal synthesis of 1T' phase dominated WS2 towards endurable electrocatalysis

Cited by 136 publications

References 25 publications

Ionic Liquid‐Intercalated Metallic MoS2 as a Superior Electrode for Energy Storage Applications

Ionic Liquid‐Intercalated Metallic MoS2 as a Superior Electrode for Energy Storage Applications

WXy/g‐C3N4 (WXy=W2C, WS2, or W2N) Composites for Highly Efficient Photocatalytic Water Splitting

Metallic 1T Phase Tungsten Disulfide Microflowers for Trace Level Detection of Hg2+ Ions

Contact Info

Product

Resources

About

Ionic Liquid‐Intercalated Metallic MoS₂ as a Superior Electrode for Energy Storage Applications

Ionic Liquid‐Intercalated Metallic MoS₂ as a Superior Electrode for Energy Storage Applications

WX_y/g‐C₃N₄ (WX_y=W₂C, WS₂, or W₂N) Composites for Highly Efficient Photocatalytic Water Splitting

Metallic 1T Phase Tungsten Disulfide Microflowers for Trace Level Detection of Hg²⁺ Ions