Journal of Materials Chemistry A
·
2021
·Vol. 9
·期 24
·13996-14003
·
IF 12.732
Hongqiang Jin,Yu Yu,Qikai Shen,Peipei Li,Jia Yu,Weiming Chen,Xin Wang,Zhuo Kang,Lei Zhu,Runqing Zhao,Lirong Zheng,Weiguo Song,Changyan Cao
1T-phase molybdenum disulphide (MoS2) is considered to be one of the most promising candidates to substitute noble metals in the hydrogen evolution reaction (HER). Fabricating single layer 1T-phase MoS2 with abundant sulfur vacancies as well as good stability to further enhance catalytic performance remains a challenge. Herein, we develop an efficient in situ TMA cation ((CH3)4N+) intercalation method to produce 1T-phase MoS2. The obtained MoS2 nanosheets comprise about 81% 1T-phase and abundant sulfur vacancies (>12%), as verified by aberration-corrected high-angle annular dark field scanning transmission electron microscopy (AC-HAADF-STEM), X-ray photoelectron spectroscopy (XPS), X-ray absorption fine structure (XAFS), etc. In addition, the surface of as-prepared ST-MoS2 is negatively charged, making it very stable in aqueous solution. The as-prepared ST-MoS2 exhibits excellent electrochemical HER performance with a low over-potential and a small Tafel slope as well as superior cycling stability. Furthermore, it is an excellent co-catalyst when coupled with CdS nanowires to form a CdS/ST-MoS2 heterojunction photocatalyst for the HER under visible light irradiation. It achieves a maximum H2 production rate and apparent quantum efficiency (AQE) of approximately 1187 μmol mg−1 h−1 and 73.4%, respectively, which are significantly higher than those of reported CdS/MoS2 photocatalysts.
研究领域:
材料科学
·
纳米技术
·
电化学
·
催化
·
能量转换
✓ 已验证
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2022
·
IF 9.224
Jiahuang Jian,Hongjun Kang,Xianshu Qiao,Kai Cui,Yang Liu,Yang Li,Wei Qin,Xiaohong Wu
Water electrolysis is an effective method of obtaining hydrogen energy, which is the key to achieve the global “carbon neutrality” goal. Molybdenum disulfide (MoS2) with a layered structure is considered to be a competitive hydrogen evolution reaction (HER) catalyst. However, until now, metal-atom-modified 1T-phase MoS2 with rich edge active sites has rarely been reported. Herein, we first report Co and Al co-optimized 1T-phase MoS2 (CA-1T-MoS2) with rich edge active sites using a simple one-step ball-milling method. The CA-1T-MoS2 exhibits an outstanding HER performance with an overpotential value of 102 mV at 10 mA cm–2 in 1.0 M KOH. The density functional theory (DFT) results prove that the introduction of Co and Al atoms on the rich edges of 1T-MoS2 provides rich active sites, improves the electrical conductivity, accelerates the distortion of H2O to generate H* and reduces the adsorption energy of hydrogen. Thus, CA-1T-MoS2 exhibits a prominent HER performance. This work provides a novel strategy for the simple preparation of metal-atom-modified 2D transition-metal sulfide HER catalysts with rich edge active sites.
研究领域:
材料科学
·
电化学
·
催化
·
可再生能源
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Ruijing Wang,Qiang Shao,Qin Yuan,Peng Sun,Rongrong Nie,Xuefeng Wang
The modified MoS 2 -based material, with a higher conductivity and rich active sites, is promising one of a variety of nonprecious-metal electrocatalysts for hydrogen evolution reaction (HER). Here, the bulk MoS 2 is exfoliated to form small-size MoS 2 clusters by pulse laser, which are diluted in solid sulfur and further to form porous film. The 1T phase MoS 2 ratio in the prepared film was modulated by adding the different content of sulfur into MoS 2 target. Besides, this addition also has an effect on the pore structure of films. Finally, the obtained high-content 1T phase MoS 2 film provides the highly metallic conductivity and more active sites, which results in the more enhanced HER catalytic activity with a lower Tafel slope of 38 mV dec −1 , a smaller overpotential of 151 mV at 10 mA cm −2 , compared with the pure MoS 2 film.
研究领域:
材料科学
·
电化学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
ChemSusChem
·
2018
·Vol. 11
·期 23
·4060-4070
·
IF 7.411
Huimin Zhou,Xin Xia,Pengfei Lv,Jin Zhang,Xuebin Hou,Min Zhao,Kelong Ao,Di Wang,Keyu Lu,Hui Qiao,Malgorzata Zimniewska,Qufu Wei
Graphical Better anode by design : A designed anode structure combining the metallic conductivity of 1T-MoS 2 with interconnected TiO 2 /MoO 3 grains is beneficial for fast charge-transfer reactions and reduced transmission losses. Moreover, a flexible carbon framework buffers swollen lithium compounds, such as Li x MoO 3 and Li x MoS 2 , and supports the shrinking delithiated products, with potential for achieving high capacity stability in both Li- and Na-ion batteries. Integrating layered nanostructured MoS 2 with a structurally stable TiO 2 backbone to construct reciprocal MoS 2 /TiO 2 -based nanocomposites is an effective strategy. C@TiO 2 /MoO 3 composite nanofibers doped with 1T-phase MoS 2 nanograins were fabricated by partially sulfurizing MoO x /TiO 2 precursors. By controlling a suitable preoxidation temperature before severe thermolysis of polyvinylpyrrolidone (PVP), the MoO x /TiO 2 precursors formed a polymer-embedded array through coordination of the Mo source and pyrrolidyl groups of PVP. Sulfidation under water/solvent hydrothermal conditions led to partial formation of metallic 1T-phase MoS 2 from the MoO x precursor with preoxidation at 200 °C. After carbonization, the TiO 2 /MoO 3 /MoS 2 nanograins were encapsulated in a carbon backbone in a vertical pattern, providing both chemical contact for confined electron transport and sufficient space to adapt to volume changes. The obtained carbon-based platform not only has the advantages of an integral structure, but also exhibited ultrastable specific capacities of 540 and 251 mAh g −1 for Li-ion batteries and Na-ion batteries, respectively, after 100 cycles.
研究领域:
材料科学
·
电化学
·
纳米技术
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENERGY
·
2025
·
IF 9.4
Ziyang Zhu,Nan He,Dong Wang,Qicheng Chen,Yingjin Zhang,Bingjian Nie
MoS 2 is considered a highly promising anode material for supercapacitors owing to its distinctive two-dimensional structure. However, its relatively low electrical conductivity restricts its further development and practical application. For the purpose of addressing this issue, this study reports the first synthesis of a CuO@MoS 2 /MXene ternary heterostructure based on hollow CuO. The formation of the built-in electric field, along with the redistribution of local charge, facilitates the transformation of 2H-MoS 2 into highly conductive 1T-MoS 2 . In addition, the three-dimensional crosslinked network structure formed by the highly conductive MXene and MoS 2 layers offers additional storage capacity for electrolyte ions, thereby further enhancing the energy storage density of the material. This negative material exhibits a maximum specific capacitance of 1435.2 F g −1 , which is significantly higher than that of most reported MoS 2 -based negative materials. The synergistic support provided by the porous CuO substrate and the MXene layer effectively inhibits the lamellar aggregation of MoS 2 , thereby achieving a capacitor retention rate of 90.1 % after 5000 charge-discharge cycles. The asymmetric supercapacitor constructed from the material achieves a maximum energy density of 91.4 Wh·kg −1 , demonstrating excellent application potential in various fields. This study addresses the research gap concerning negative electrode materials for high specific capacitance MoS 2 -based supercapacitors and offers a novel approach to further enhancing the energy density of supercapacitors.
研究领域:
材料科学
·
纳米技术
·
电化学
·
储能技术
·
无机化学
·
应用物理学
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-14
·
IF 15.7
Wang Peng,Zhao Danyang,Zhang Peng,Hui Xiaobin,Zhang Zhiwei,Wang Rutao,Wang Chengxiang,Ge Xiaoli,Liu Xiaojing,Li Yuguang C.,Yin Longwei
The metallic phase MoS 2 (1T-MoS 2 ) supported metal-nanocatalyst is an appealing material system for accelerating the redox kinetics of non-aqueous Li | |O 2 batteries. However, the drawbacks associated with the surface orbital steric effect and the internal electron coupling results in a detrimental effect for the stability of 1T-MoS 2 , especially for the interface charge transfer. This makes it difficult to incorporate guest metal nanoparticles without compromising the 1 T phase support. To circumvent these issues, here we propose a p-block element (In-O) doping strategy to stabilize the 1 T phase MoS 2 by moderating the surface orbital steric effect and strengthening the internal chemical bonding, and thus for the epitaxial Ru nanocatalyst graft on the stabilized 1T-MoS 2 for Li | |O 2 batteries. The experimental and theoretical analyzes indicate that the In-O-MoS 2 @Ru enhances the O 2 dissociation and facilitates the adsorption of LiO 2 intermediates. This effect promotes the growth of weakly crystalline Li 2 O 2 films during oxygen reduction reaction, which can be more easily decomposed during the oxygen evolution reaction, thereby enhancing the bifunctional-catalytic kinetics. When employed at the positive electrode for non-aqueous Li | |O 2 batteries, In-O-MoS 2 @Ru shows an overpotential of 0.37 V and a cycling life of 284 cycles at 200 mA g −1 with a final discharge specific capacity of 1000 mAh g −1 at 25 °C.
研究领域:
材料科学
·
电化学
·
储能技术
·
纳米技术
·
催化
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）