scholarly journals Interface Engineering of Heterogeneous Transition Metal Chalcogenides for Electrocatalytic Hydrogen Evolution

2022 ◽  
Author(s):  
Ruru Song ◽  
Deyu Li ◽  
Yafeng Xu ◽  
Junfeng Gao ◽  
Lu Wang ◽  
...  
Keyword(s):  
Transition Metal ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Active Sites ◽  
Metal Chalcogenides ◽  
Interface Engineering ◽  
Transition Metal Chalcogenides

MoS2 and MoSe2 are recognized as the promising electrocatalysts for hydrogen evolution reaction (HER), but the active sites are mainly located on the edge, limiting their electrochemical efficiency. Here we...

scholarly journals Facile Synthesis of N-Doped WS2 Nanosheets as an Efficient and Stable Electrocatalyst for Hydrogen Evolution Reaction in Acidic Media

Catalysts ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 1238 ◽  
Author(s):  
Arpan Kumar Nayak ◽  
Enhbayar Enhtuwshin ◽  
So Jung Kim ◽  
HyukSu Han
Keyword(s):  
Transition Metal ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Active Sites ◽  
Chemical Agent ◽  
Metal Chalcogenides ◽  
Practical Applications ◽  
Transition Metal Chalcogenides ◽  
Acidic Conditions ◽  
Ws2 Nanosheets

Transition metal chalcogenides have been widely studied as a promising electrocatalyst for the hydrogen evolution reaction (HER) in acidic conditions. Among various transition metal chalcogenides, tungsten disulfide (WS2) is a distinguishable candidate due to abundant active sites and good electrical properties. Herein, we report a facile and selective synthetic method to synthesize WS2 with an intriguing two-dimensional nanostructure by using cysteine (C3H7NO2S) as a chemical agent. In addition, nitrogen can be incorporated during chemical synthesis from cysteine, which may be helpful for enhancing the HER. The electrocatalytic activity of N-doped WS2 exhibits a promising HER in acidic conditions, which are not only higher than W18O49 nanowires and hex-WO3 nanowires, but also comparable to the benchmark Pt/C. Moreover, excellent electrocatalytic stability is also demonstrated for acidic HER during long-term tests, thus highlighting its potential use of practical applications as an electrolyzer.

In situ photo-assisted deposition and photocatalysis of ZnIn2S4/transition metal chalcogenides for enhanced degradation and hydrogen evolution under visible light

2016 ◽  
Vol 45 (2) ◽  
pp. 552-560 ◽  
Author(s):  
Wei Yang Lim ◽  
Minghui Hong ◽  
Ghim Wei Ho
Keyword(s):  
Hydrogen Production ◽  
Transition Metal ◽  
Visible Light ◽  
Hydrogen Evolution ◽  
Metal Chalcogenides ◽  
Co Catalyst ◽  
Photocatalytic Hydrogen Production ◽  
Transition Metal Chalcogenides ◽  
Enhanced Degradation

In-situ aqueous photo-assisted deposition of transition metal chalcogenides co-catalyst has shown to infiltrate hierarchical host ZnIn2S4 photocatalyst for efficient photocatalytic hydrogen production and degradation under visible light.

scholarly journals Transition Metal Chalcogenides for the Electrocatalysis of Water

2020 ◽  
Author(s):  
Chi-Ang Tseng ◽  
Chuan-Pei Lee
Keyword(s):  
Transition Metal ◽  
Vapor Phase ◽  
Hydrogen Evolution Reaction ◽  
Solvothermal Synthesis ◽  
Chemical Vapor ◽  
Metal Chalcogenides ◽  
Preparation Methods ◽  
Transition Metal Chalcogenides ◽  
Electrochemical Water Splitting

Sustainable energy technology has received enormous attention in recent years. Specifically, electrochemical water splitting is considered to be the cleanest technique for the production of promising fuels, for example, hydrogen and oxygen, where transition metal (di)chalcogenides (TMCs) as electrocatalysts for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) have been a growing interest. In this chapter, the typical preparation methods of TMCs such as chemical vapor phase deposition (CVD) and solvothermal synthesis are introduced. Then, several TMC materials for catalyzing HER and OER are reviewed. Most importantly, this chapter also introduced some in situ approaches to realize the mechanism of electrocatalytic behavior toward HER and OER. Finally, the conclusion and futuristic prospects of TMCs in HER and OER are discussed.

Increasing the active sites and intrinsic activity of transition metal chalcogenide electrocatalysts for enhanced water splitting

2020 ◽  
Vol 8 (48) ◽  
pp. 25465-25498
Author(s):  
Jingbin Huang ◽  
Yan Jiang ◽  
Tianyun An ◽  
Minhua Cao
Keyword(s):  
Transition Metal ◽  
Water Splitting ◽  
Active Sites ◽  
Intrinsic Activity ◽  
Metal Chalcogenides ◽  
Metal Chalcogenide ◽  
Transition Metal Chalcogenides

Strategies for enhancing the electrocatalytic activities of transition metal chalcogenides by increasing the number of active sites and intrinsic activity.

scholarly journals WS2–WC–WO3 nano-hollow spheres as an efficient and durable catalyst for hydrogen evolution reaction

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Tuan Van Nguyen ◽  
Ha Huu Do ◽  
Mahider Tekalgne ◽  
Quyet Van Le ◽  
Thang Phan Nguyen ◽  
...  
Keyword(s):  
Transition Metal ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Transition Metal Oxides ◽  
Photoelectron Spectroscopy ◽  
Active Sites ◽  
Low Cost ◽  
Hollow Spheres ◽  
Efficient Catalyst ◽  
X Ray

AbstractTransition metal dichalcogenides (TMDs), transition metal carbides (TMCs), and transition metal oxides (TMOs) have been widely investigated for electrocatalytic applications owing to their abundant active sites, high stability, good conductivity, and various other fascinating properties. Therefore, the synthesis of composites of TMDs, TMCs, and TMOs is a new avenue for the preparation of efficient electrocatalysts. Herein, we propose a novel low-cost and facile method to prepare TMD–TMC–TMO nano-hollow spheres (WS2–WC–WO3 NH) as an efficient catalyst for the hydrogen evolution reaction (HER). The crystallinity, morphology, chemical bonding, and composition of the composite material were comprehensively investigated using X-ray diffraction, Raman spectroscopy, field emission scanning electron microscopy, and X-ray photoelectron spectroscopy. The results confirmed the successful synthesis of the WS2–WC–WO3 NH spheres. Interestingly, the presence of nitrogen significantly enhanced the electrical conductivity of the hybrid material, facilitating electron transfer during the catalytic process. As a result, the WS2–WC–WO3 NH hybrid exhibited better HER performance than the pure WS2 nanoflowers, which can be attributed to the synergistic effect of the W–S, W–C, and W–O bonding in the composite. Remarkably, the Tafel slope of the WS2–WC–WO3 NH spheres was 59 mV dec−1, which is significantly lower than that of the pure WS2 NFs (82 mV dec−1). The results also confirmed the unprecedented stability and superior electrocatalytic performance of the WS2–WC–WO3 NH spheres toward the HER, which opens new avenues for the preparation of low-cost and highly effective materials for energy conversion and storage applications.

Promoting the water reduction reaction of transition metal dichalcogenides in a basic electrolyte by interface engineering

2018 ◽  
Vol 6 (36) ◽  
pp. 17488-17494 ◽  
Author(s):  
Hui Ding ◽  
Qiyang Jiao ◽  
Haifeng Lv ◽  
Kun Xu ◽  
Qiyu Xing ◽  
...  
Keyword(s):  
Transition Metal ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Alkaline Solution ◽  
Transition Metal Dichalcogenides ◽  
Reduction Reaction ◽  
Interface Engineering ◽  
Water Reduction ◽  
Metal Dichalcogenides

The interface engineering between NiSe and MoSe2 boosts the hydrogen evolution reaction in alkaline solution.

scholarly journals Highly Active Mo2C@WS2 Hybrid Electrode for Enhanced Hydrogen Evolution Reaction

Catalysts ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1060
Author(s):  
Sajjad Hussain ◽  
Dhanasekaran Vikraman ◽  
Manzoor Hussain ◽  
Hyun-Seok Kim ◽  
Jongwan Jung
Keyword(s):  
Transition Metal ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Active Sites ◽  
Transition Metal Dichalcogenides ◽  
Transition Metal Carbide ◽  
Diffusion Resistance ◽  
Conductivity Enhancement ◽  
Highly Active ◽  
Metal Dichalcogenides

Transition metal dichalcogenides (TMDs) are the auspicious inexpensive electrocatalysts for the hydrogen evolution reaction (HER) which has been broadly studied owing to their remarkable enactment, however the drought of factors understanding were highly influenced to hinder their electrocatalytic behavior. Recently, transition metal carbide (TMC) has also emerged as an attractive electrode material due to their excellent ionic and electronic transport behavior. In this work, Mo2C@WS2 hybrids have been fabricated through a simple chemical reaction method. Constructed heterostructure electrocatalyts presented the small Tafel slope of 59 and 95 mV per decade and low overpotential of 93 mV and 98 @10 mA·cm−2 for HER in acidic and alkaline solution, respectively. In addition, 24-h robust stability with the improved interfacial interaction demonstrated the suitability of hybrid electrocatalyst for HER than their pure form of Mo2C and WS2 structures. The derived outcomes describe the generated abundant active sites and conductivity enhancement in TMC/TMD heterostructure along with the weaken ion/electron diffusion resistance for efficient energy generation applications.

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