Journal of Energy Chemistry
·
2019
·
IF 5.162
Tian-Tian Chen,Rui Wang,Lin-Ke Li,Zhong-Jun Li,Shuang-Quan Zang
Metal–organic framework (MOF) derived hybrid materials have been developed as an efficient non-noble-metal electrocatalysts for clean energy conversion systems. In this work, a Co-based MOF containing nitrogen and oxygen heteroatoms (Co-NOMOF) mixed with the thiomolybdate [Mo 3 S 13 ] 2− nanoclusters was used to prepare the N, S, O-doped carbon encapsulating Co 9 S 8 and MoS 2 (Co 9 S 8 /MoS 2 @NSOC) nanocomposite by one-step pyrolysis . The Co 9 S 8 /MoS 2 @NSOC nanocomposite exhibited remarkable catalytic performance for hydrogen evolution reaction (HER) with overpotential of 194 and 233 mV in 1 M KOH and 0.5 M H 2 SO 4 solution under 10 mA cm −2 , respectively, which was ascribed to the multiheteroatom-doped hierarchical porous carbon matrix and the synergistic effect of intrinsic activity of Co 9 S 8 and MoS 2 . This work provides new opportunity for developing highly efficient non-precious metal electrochemical catalysts.
研究领域:
材料科学
·
能源化学
·
电催化领域
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Fuling Li,Changgeng Li,Quan Xie,Xuelong Chen,Xiu-Zhi Tang,Tong Guo
Elegant material construction to realize high-efficiency microwave absorption with low filler loading is in strong demand yet remains challenging. Here we combine a self-assembly method followed by pyrolysis to fabricate core-shell Co 9 S 8 @MoS 2 nanocubes, which were uniformly anchored on reduced graphene oxide nanosheets (A-G/Co 9 S 8 @MoS 2 ) to form hierarchical heterostructures . The heterostructure was deliberately designated via chemical etching of in situ formed Co 9 S 8 derived from ZIF-67 and decoration of flower-like MoS 2 nanosheets. Owing to its synergic effect in compositions and well-designed heterostructure, the product A-G/Co 9 S 8 @MoS 2 exhibits excellent microwave absorption performance with low loading content. A minimum reflection loss of − 55.13 dB and effective absorption bandwidth of 6.61 GHz with filler loading of only 8 wt% was achieved, contributed by the good impedance matching and dual loss mechanism. This work provides a new pathway for designing low-filler loading high-performance microwave absorption materials.
研究领域:
材料科学
·
电磁学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2020
·
IF 7.489
Linghao He,Shunjiang Huang,Yongkang Liu,Minghua Wang,Bingbing Cui,Shide Wu,Jiameng Liu,Zhihong Zhang,Miao Du
In view of the importance of multifunctional catalysts that can drive different electrocatalytic reactions in the same electrolyte solution, we designed and prepared a series of multicomponent nanohybrids composed of Co 9 S 8 and MoS 2 derived from cobalt-doped polyoxometalate (Co-POMs) by one-pot calcination method. The obtained Co 9 S 8 @MoS 2 nanohybrids were composed of Co 9 S 8 , MoS 2 , Co-Mo-S phases and assembled nanosheets, and therefore were explored as trifunctional electrocatalysts for hydrogen evolution reaction, oxygen evolution reaction, and methanol oxidation reaction (MOR) in an alkaline medium. The nanostructure and chemical components of the series of Co 9 S 8 @MoS 2 nanohybrids can be modulated by changing the mole ratios of H 5 Mo 12 O 41 P to Co(NO 3 ) 2 precursor. Compared with the sole component and other reported Co 9 S 8 @MoS 2 nanohybrids, the Co 9 S 8 @MoS 2 nanohybrid prepared from the 1:1 ratio of PMo 12 and Co(NO 3 ) 2 exhibited superior MOR catalysis efficiency (121.4 mA cm −2 ) and an extremely low overpotential (1.49 V) for overall water splitting at a current density of 10 mA cm −2 owning to the effective synergism among Co 9 S 8 , MoS 2 , and Co-Mo-S phase. Overall, this study provides a feasible approach to developing efficient and stable trifunctional bimetal electrocatalysts for clean-energy applications.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Baochuan Shao,Yanyan Ma,Liren Wu,Feiyang Xu,Mengyao Wei,Yuanbin Qin,Lei Liu,Yongmei Li,Yiru Ma,Fengyun Wang
Rechargeable sodium-ion batteries (SIBs) offer significant promise for the energy market due to their environmental friendliness, low cost, and high energy density. However, challenges such as volume expansion and sluggish reaction kinetics during charging/discharging limit the widespread practical development of SIBs. Herein, a hollow flower-like heterostructure composite material, g-Co 9 S 8 /MoS 2 @NS-C, was synthesized via a glucose-assisted hydrothermal method followed by a one-step water bath process, where g stands for glucose-derived carbon acting as the carbon structure. The hollow Co 9 S 8 framework derived from ZIF-67 provides structural stability, and accommodates volume changes during redox reactions. The Co 9 S 8 /MoS 2 heterointerface establishes a built-in electric field, which can promote the fast migration of electrons/ions. In addition, doped N and S heteroatoms within the carbon matrix and conductive carbon coating layer may cooperate synergistically not only to improve total conductivity, but also to generate more active sites. Consequently, when used as the anode of sodium batteries, the composite can exhibit a capacity value of 433.4 mAh g −1 after 200 cycles at 2 A g −1 , achieving superior capacity retention. Additionally, the electrode can still offer a particular capacity of 386.6 mAh g −1 at 5 A g −1 . Remarkably, it maintains 377.0 mAh g −1 after 200 cycles even at −30 °C under 50 mA g −1 , demonstrating exceptional low-temperature stability. This research can offer a possible route to high-performance anodes for SIBs.
✓ 已验证
产品关联
DOI
高影响因子
ACS Nano
·
2020
·
IF 14.588
Boyu Li,Qingmei Su,Lintao Yu,Jun Zhang,Gaohui Du,Dong Wang,Di Han,Miao Zhang,Shukai Ding,Bingshe Xu
The introduction of a dual-functional interlayer into lithium–sulfur batteries (LSBs) provides many opportunities for restraining the “shuttle effect” and enhancing sluggish sulfur conversion kinetics. Tuning the band structure of the metal sulfide provides an opportunity to enhance its catalytic activity, which plays an important role in suppressing the “shuttle effect” of lithium polysulfides (LiPSs) in LSBs. Here were present a Co9S8@MoS2 core–shell heterostructure anchored to a carbon nanofiber (Co9S8@MoS2/CNF), developed as an interlayer for suppressing the shuttle effect of LiPSs. The fabricated composite heterostructure is determined to be an effective alternative material that combines the synergistic relationship between chemisorption and electrochemical catalysis. We find that the band structure of the MoS2 shell can be effectively tuned by the Co9S8 core and that the Co9S8@MoS2/CNF can capture the LiPSs, providing excellent catalytic ability to convert LiPSs into Li2S2, with subsequent transformation from Li2S2 to Li2S. Importantly, high capacities of 1002 and 986 mAh g–1 can be retained after 50 cycles with high-sulfur loadings of 6 and 10 mg cm–2. Our results highlight the design of an atomic-scale heterostructure as a multifunctional interlayer providing a synergistic relationship between adsorption and catalysis. The net result is an effective retardation of the shuttling of LiPSs and an enhancement of the electrochemical redox reactions of LiPSs. This work shows great promise toward the development of practical applications of LSBs.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Biomimetics
·
2023
·Vol. 8
·期 1
·104
·
IF 4.5
Lili Zhang,Jitang Zhang,Aijiao Xu,Zhiping Lin,Zongpeng Wang,Wenwu Zhong,Shijie Shen,Guangfeng Wu
The electrocatalytic hydrogen evolution activity of transition metal sulfide heterojunctions are significantly increased when compared with that of a single component, but the mechanism behind the performance enhancement and the preparation of catalysts with specific morphologies still need to be explored. Here, we prepared a Co9S8/MoS2heterojunction with microsphere morphology consisting of thin nanosheets using a facile two-step method. There is electron transfer between the Co9S8and MoS2of the heterojunction, thus realizing the redistribution of charge. After the formation of the heterojunction, the density of states near the Fermi surface increases, thed-band center of the transition metal moves downward, and the adsorption of both water molecules and hydrogen by the catalyst are optimized. As a result, the overpotential of Co9S8/MoS2is superior to that of most relevant electrocatalysts reported in the literature. This work provides insight into the synergistic mechanisms of heterojunctions and their morphological regulation.Keywords:heterojunction;thin nanosheets;Co9S8;MoS2;electrocatalyst;hydrogen evolution reaction
研究领域:
材料科学
·
电化学
·
催化
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2021
·
IF 4.158
Xiaoyang Xu,Ting Wei,Rui Xiong,Zhenni Zhang,Xiangjing Zhang,Shanlin Qiao,Qing Li,Yongqi Hu
The high-performance Co 9 S 8 @MoS 2 composite was firstly prepared though the ammonium fluoride regulated CoMoS 4 -derived process by a simple one-step hydrothermal method , without the previous complicated and tedious preparation procedures. Moreover, it can exhibit the ultrahigh specific capacity of 213 mAh/g at 1 A/g, owing to the multiple oxidation state of Co/Mo, conductivity superiority of metallic sulfides and suitable structure. In order to simulate the application indicators of Co 9 S 8 @MoS 2 composite for commercial supercapacitors , the Co 9 S 8 @MoS 2 //AC hybrid supercapacitor device was well designed by the optimized Co 9 S 8 @MoS 2 composite and commercial active carbon (AC) as positive/negative electrode respectively, and exhibits the good electrochemical properties : the high energy density of 42 Wh/kg at 375 W/kg, and even still maintain 25 Wh/kg at the high power density of 2250 W/kg; and excellent cycle stability with no significant reduction of capacity retention after 9000 cycles. This work can not only provide a simple one-step hydrothermal preparation method of Co 9 S 8 @MoS 2 composite, but also confirm its promising application prospects in supercapacitor electrode materials.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
DOI
高影响因子
Journal of Advanced Research
·
2026
·
IF 17.1
Ailing Feng,Xu Zhu,Shijiu Ding,Peitao Liu,Yue Peng,Yanqing Zu,Xiaodong Li,Yanan Chen,Pengfei Bi
The design of multifunctional catalysts demonstrating exceptional efficiency in complete water electrolysis reactions across various pH environments represents a critical advancement for large-scale generation of renewable hydrogen. This study presents an exceptionally effective catalytic system consisting of cobalt-decorated Co 9 S 8 /MoS 2 heterostructures supported on ultrathin nitrogen-doped graphene nanosheets (denoted as Co-Co 9 S 8 /MoS 2 @NG). The hybrid architecture integrates transition metal sulfides with conductive graphene substrates through strategic cobalt decoration and nitrogen doping, achieving optimized electronic configurations for enhanced catalytic performance. The Co 9 S 8 /MoS 2 @NG composite demonstrates outstanding catalytic performance and durability across various pH conditions for oxygen generation processes, achieving overpotentials of 210, 238, and 230 mV at 10 mA/cm 2 in alkaline, neutral, and acidic environments respectively. Notably, this bifunctional catalyst also shows remarkable efficiency in hydrogen production applications. When implemented in a customized water-splitting electrolyzer utilizing Co-Co 9 S 8 /MoS 2 @NG for both anode and cathode functions, the system achieved operational voltages of 1.58, 1.55, and 1.56 V under alkaline, neutral, and acidic conditions correspondingly. The synthesized Co-Co 9 S 8 /MoS 2 @NG composite demonstrates remarkable catalytic performance, requiring only 1.52 V to maintain 10 mA/cm 2 current density across alkaline, neutral, and acidic electrolytes. This material surpasses commercial Pt/C||Ir/C systems (showing 1.64 V, 1.68 V, and 1.66 V in corresponding media) while maintaining competitiveness with state-of-the-art catalysts documented in recent studies. These findings demonstrate the multifunctional capabilities of Co-Co 9 S 8 /MoS 2 @NG as an efficient tri-electrode material for enhanced water electrolysis systems, offering new possibilities for sustainable energy conversion technologies.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2026
·
IF 5.8
Juan Wei,Jin-Tao Cheng,Min Luo,Xi Wang,Xiao-Yu Xie,Xian Wu,Wei Shen,Pang-Da Dai,Zong-Yin Song,Meng Yang
Designing a highly sensitive electrochemical sensing interface and elucidating the mechanism of enhanced electrochemical signals from the perspective of electronic structure are crucial for accurate detection of heavy metal ions (HIMIs). In this study, a composite transition metal sulfide Co 9 S 8 @MoS 2 heterostructure was developed for the high-sensitivity detection of Pb(II) in Chinese herbal medicine, which achieved a high sensitivity of 103.3 ± 0.5 μA μM −1 and a detection limit of 0.01 μM. Moreover, the fundamental reason for the excellent detection of Pb(II) was investigated by X-ray photoelectron spectroscopy (XPS) and density functional theory (DFT). The results indicated that the recombination of the heterojunction not only catalyzes the activation of the Co site in Co 9 S 8 but also promotes S as a medium in the electron channel for increased charge transfer. In addition, the proposed method displayed anti-interference ability with outstanding stability and reproducibility in the presence of other HMIs. Importantly, the highly sensitive detection of Pb(II) has also been inherited in herbal Rehmannia glutinosa samples, demonstrating its potential for practical application in the detection of heavy metal ions in Chinese herbal medicine. This work provides essential theoretical guidance for constructing high-performance electrochemically sensitive interfaces from electronic structure-controlled sensing materials.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）