JOURNAL OF POWER SOURCES
·
2016
·
IF 6.333
Hong Yuan,Qingze Jiao,Jia Liu,Xiufeng Liu,Haoyi Yang,Yun Zhao,Qin Wu,Daxin Shi,Hansheng Li
A novel ultrathin-walled Co 9 S 8 nanotube/reduced graphene oxide electrocatalyst , for the first time, is successfully prepared by a simple hydrothermal process coupling with an ion exchange process for the reduction of triiodide in dye-sensitized solar cells (DSSC). Ultrathin-walled Co 9 S 8 nanotubes have an average diameter of 20–30 nm and a wall thickness of 3–4 nm, and the reduced graphene oxide possessing high conductivity is well dispersed in the Co 9 S 8 nanotubes simultaneously, which contributed to the high specific surface area, well exposed active sites and excellent electric conductivity . The electrochemical performances of ultrathin-walled Co 9 S 8 nanotube/reduced graphene oxide are evaluated by the EIS , Tafel polarization and CV measurements, exhibiting the significant improvement of electrocatalytic performance for the triiodide reduction. Optimizing the film thickness of Co 9 S 8 nanotube/reduced graphene oxide counter electrode, the optimum photovoltaic conversion efficiency of 7.58% is obtained, which is even higher than that of the DSSC with Pt counter electrode (7.45%). In addition, the DSSC with Co 9 S 8 /reduced graphene oxide electrode exhibits a good repeatability and long-term electrochemical stability. Therefore, the ultrathin-walled Co 9 S 8 nanotube/reduced graphene oxide is a reliable material to replace Pt.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
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.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Jingwei Li,Peiman Xu,Rongfu Zhou,Ruchun Li,Lijun Qiu,San Ping Jiang,Dingsheng Yuan
Large-scale commercialization of water splitting is still challenging due to the lack of efficient, cost-effective and robust electrodes. In this work, Co 9 S 8 –Ni 3 S 2 heterointerfaced nanotubes on Ni foam (Co 9 S 8 –Ni 3 S 2 HNTs/Ni) have been successfully developed via a two-step hydrothermal method as a highly efficient, robust and flexible bifunctional electrodes for water splitting. Co 9 S 8 –Ni 3 S 2 HNTs are composed of inner 1D Co 9 S 8 nanotubes surrounded by outer 2D Ni 3 S 2 nanosheets . Co 9 S 8 –Ni 3 S 2 HNTs/Ni electrode achieves 10 mA cm −2 at overpotentials of 85 mV for H 2 evolution reaction (HER) and 50 mA cm −2 at overpotential of 281 mV for O 2 evolution reaction (OER) in 1 M KOH solution, substantially better than that on single-phased Co 9 S 8 nanotubes and Ni 3 S 2 nanosheets on Ni foam. The reason is most likely due to formation of defect-rich heterointerfaces between Co 9 S 8 nanotubes and Ni 3 S 2 nanosheets, and the significant change of binding energies of Co 2p and Ni 2p level between the Co 9 S 8 and Ni 3 S 2 , leading to the synergistic effect on the enhanced catalytic activity for HER and OER. The robust and flexibility of Co 9 S 8 –Ni 3 S 2 HNTs/Ni electrodes are demonstrated in an alkaline electrolyzer, delivering 10 mA cm −2 electrolysis current at a cell voltage of 1.59 V, one of the best bifunctional electrodes for water splitting. Owing to the fact that reaction occurs at the defects-rich heterointerfaces, the Co 9 S 8 -Ni 3 S 2 HNTs/Ni electrodes are structurally very stable.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Wen-Kun Gao,Jun-Feng Qin,Kai Wang,Kai-Li Yan,Zi-Zhang Liu,Jia-Hui Lin,Yong-Ming Chai,Chen-Guang Liu,Bin Dong
Cobalt sulfides have drawn enormous attention as earth-abundant alternatives to precious-metal electrocatalysts capable of catalyzing oxygen evolution reaction (OER) in alkaline medium. Although significant progresses have been realized in the development of various composite modulation to improve their properties for oxygen evolution, to boost their poor catalytic activity for oxygen evolution reaction is still challenging, which unambiguously limits the wide utilization of cobalt sulfides. Here, we present the facile growth of metal-doping (Fe, Ni) into Co 9 S 8 supported on nickle foam (NF) through a one-step simple hydrothermal process. The effect of (Fe, Ni)-doping on the morphology and the catalytic activity of Co 9 S 8 has been thoroughly investigated. Fe-Co 9 S 8 nano-microspheres supported on NF (Fe-Co 9 S 8 NM/NF) have been obtained with the remarkable electrocatalytic activity, which only requires a lower overpotential of 270 mV to reach a current density of 10 mA cm −2 and exhibits the smaller Tafel slope of 70 mV dec −1 as well as robust stability. The excellent OER performance of Fe-Co 9 S 8 NM/NF could be attributed to the synergistic interaction of Fe dopants with Co 9 S 8 nano-microspheres and faster charge transfer rate derived from NF support. This work provides a new and effective way to design metal-doped Co 9 S 8 -based heterostructures supported on conductive support as efficient OER electrocatalysts.
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2018
·
IF 5.116
Kelong Ao,Dawei Li,Yixin Yao,Pengfei Lv,Yibing Cai,Qufu Wei
Heteroatom doping is a feasible approach to adjust catalytic performance of the HER catalysts. In this work, we report a design of Fe-doped Co 9 S 8 nanosheets grown on carbon cloth (Fe-Co 9 S 8 NSs/CC) as a hydrophilic 3D monolithic electrocatalyst for efficient hydrogen evolution under all pH. The water contact angle and electrochemical measurements proved that the resultant material was hydrophilic for its nano hierarchitectures and dopant Fe enhanced the catalytic capability of singular Co 9 S 8 . In 1.0 M KOH, the Fe-Co 9 S 8 NSs/CC possessed a relatively small Tafel slope (95.3 mV dec −1 ) and required the overpotential of 83 mV to achieve 10 mA cm −2 . To drive the same current density, the overpotentials were 65 and 192 mV in 0.5 M H 2 SO 4 and 1.0 M PBS, respectively. Meanwhile, it showed good cycle stability and durability over 20 h static test at alkaline and neutral condition. The flexible freestanding catalyst has great potential in practical applications.
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2023
·
IF 6.6
Qianqian Kang,Wei Wang,Tong Wang,Zhipeng Mao,Wen Li,Peng Wang,Shougang Chen
Herein, we develop a novel composite coating with excellent self-healing and anticorrosion properties activated by photothermal responsive hollow core-shell nanofillers. A photothermal heterojunction Co 9 S 8 @Bi 2 S 3 was prepared and integrated into polyurethane containing disulfide bonds. It is found that the heterojunction has enhanced the light absorption capacity and has increased the number and lifetime of photogenerated electron-hole pairs, making more photogenerated charges pass through the heterojunction interface by reducing interface transfer resistance and releasing heat as well. Under 808 nm near-infrared light irradiation, the photothermal effect of Co 9 S 8 @Bi 2 S 3 can trigger the reconstruction of dynamic disulfide bonds and reversible hydrogen bonds simultaneously to heal coating scratches. The surface characterization and electrochemical test results manifest that the coating containing 2 wt% 10 %-Co 9 S 8 @Bi 2 S 3 nanofillers displayed excellent self-healing and anti-corrosive capabilities. The self-healing efficiency of nearly 90 % was achieved after five-time cutting-healing cycles on the coating. The protection performance of the initial immersion stage could be restored by nearly 100 % after five-time self-healing, and the low-frequency impedance modulus was above 10 8 Ω cm 2 even after 60 days of immersion. This work would provide a new tactic for developing multi-cycle self-healing coatings triggered by photothermal effects.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2026
·
IF 8.4
Enxiang Zhou,Lijun Zhou,Yan Jin,Siyu Cai,Maxim Sychov,Yi Wang,Xihong Lu
Nickel/cobalt-based materials have attracted significant interest as cathode materials for aqueous alkaline Zn batteries (AAZBs) due to their high theoretical capacity and natural abundance. However, their practical application is hindered by unsatisfied discharge capacity and poor cycling stability, primarily caused by insufficient active sites and sluggish reaction kinetics. Herein, an effective approach is demonstrated to achieve high-efficiency and stable cathode for AAZBs by anchoring the NiCo 2 S 4 /Co 9 S 8 heterostructures on MXene nanosheets (NCS/CS@MXene), accompanied with morphological optimization. The introduced MXene significantly increases the effective active area and electrical conductivity of the composite. Consequently, the NCS/CS@MXene//Zn battery delivers a high areal capacity of 1.01 mAh cm −2 at 2 mA cm −2 , excellent cycling stability of 2500 cycles with only 0.00416% of capacity degradation per cycle, and nearly 100% coulombic efficiency.
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2026
·
IF 19.7
Die Yuan,Kai Li,Xuebin Lu,Chaoqin Zhao,Guijian Zhang,Ping Ning,Dongdong Zhang,Xin Sun,Shuangyou Bao,Chi Wang
A dual-channel electron-donation pathway enables reductant-free Fe 2+ /Co 2+ regeneration. • Pollutants and S 2- synergistically drive reversible M(III)/M(II) redox cycling. • Co 9 S 8 /FeS/PMS achieves rapid and complete levofloxacin degradation within 10 min. A magnetic Co 9 S 8 /FeS composite derived from cobalt slag was developed for reductant-free PMS activation through a novel dual-channel electron-donation pathway involving S 2- species and levofloxacin (LEV). The catalytic performance and mechanism were investigated through degradation kinetics, reactive-species identification, X-ray absorption fine spectroscopy (XAFS), X-ray photoelectron spectroscopy (XPS) analyses, density functional theory (DFT) and life cycle assessment. The Co 9 S 8 /FeS/PMS system completely degraded LEV within 10 min (k = 0.4498 min −1 ), maintained efficient removal over pH 3.0–11.0 and after five cycles (>95%), with 1 O 2 as the dominant reactive species. DFT calculations, together with XAFS/XPS analyses, revealed that S 2− and LEV serve as dual electron donors to facilitate Fe 3+ /Co 3+ reduction, achieving nearly complete Fe/Co redox cycling and sustained PMS activation. Compared with conventional single-electron-donor Fenton-like systems, this strategy eliminates the need for external reductants and substantially reduces environmental impacts, offering a sustainable route for converting cobalt slag into recyclable catalysts for antibiotic wastewater treatment. Download: Download high-res image (176KB) Download: Download full-size image
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Yueyue Ma,Mengqi Wu,Ling Li,Zhanyu Li,Xiaohui Zhao,Ruqian Lian,Wenming Zhang
In this work, we synthesized a three-dimensional porous nitrogen-doped carbon composite with a uniform dispersion of MOF-derived Co 9 S 8 nanoparticles (3D Co 9 S 8 @NPC) via a simple template method combining with in situ high temperature pyrolysis. As K-ion battery anode, the 3D Co 9 S 8 @NPC exhibits a high specific capacity of 315 mA h g −1 at 0.1 A g −1 after 200 cycles, as well as a capacity of 223 mA h g −1 at 1 A g −1 after 1000 cycles, which is superior to the performance of KIB metal sulfide-based anode materials reported previously. The excellent performance is attributed to more pore structure and active sites in 3D Co 9 S 8 @NPC, which reduce efficiently K + diffusion length and accelerate the insertion/extraction of K + . The 3D N-doped carbon matrix also speeds up electron transport and buffers the volume expansion of Co 9 S 8 . Moreover, density functional theory (DFT) calculations demonstrate that due to the small energy change of K ion on Co 9 S 8 surface, the 3D Co 9 S 8 @NPC electrode is expected to show ideal rate capability in the K-ion battery system. This work provides ideas to craft other 3D structure anodes towards high-performance metal-ion batteries.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS RESEARCH
·
2022
·Vol. 37
·期 11
·1835-1844
·
IF 2.909
Yang Meng,Zhou Guangyan,Wei Yajuan,Huang Zhengguo,Zhang Jingbo
The catalytic activity of quaternary Cu 2 ZnSnS 4 (CZTS) as counter electrode (CE) of dye-sensitized solar cells (DSSCs) was enhanced by covering Co 9 S 8 on CZTS thin film prepared by the spin-coating method. The effect of the repeating number of spin coating process on morphologies and catalytic properties of CZTS thin films was investigated. When the repeating number of spin coating processes is 3, the CZTS thin film thickness is moderate and the formed nanoparticles are tightly bound. The conversion efficiency of DSSC based on the CZTS thin film CE prepared by 3 spin coating cycles reaches 4.79%. By forming a CZTS/Co 9 S 8 composite electrode via vulcanizing the deposited ZIF-67, the highest photoelectric conversion efficiency of DSSC based on the optimized composite CE further reaches 6.41%. The higher photoelectric conversion efficiency is attributed to the good interfacial transferring of electrons and redox properties for electrolyte of the composite CE. Graphical abstract
✓ 已验证
产品关联
DOI
高影响因子
Advanced Sustainable Systems
·
2023
·
IF 7.1
Jingyun Wang,Wei Li,Yanhong Li,Aisheng Huang
Fine regulation of the physicochemical structure of carbon-based electrocatalysts to optimize the adsorption energies of oxygen intermediates is critically important to enhance the reaction kinetics of the oxygen evolution/reduction reaction (OER/ORR) but remains a huge challenge. Herein, nano-space confined growth of Co 9 S 8 nanoparticles (NPs) in porous carbon is realized through an in situ confined growth strategy by using thiol-chains functionalized COF (COF-S-SH) as a confined template. COF-S-SH is used as binding sites to immobilize Co ions to improve the interaction between metal nanoparticles (NPs) and carbon skeletons, and simultaneously serves as a confined void to avoid the aggregation metal NPs. Impressively, as an efficient bifunctional catalyst, the resulting Co 9 S 8 /COF-S 800 shows significantly enhanced oxygen electrocatalysis with a small OER-ORR voltage gap of 0.76 V, vastly superior to that of pristine COF-S 800 . Furthermore, the assembled Zn–air battery with Co 9 S 8 /COF-S 800 catalyst displays a high peak power density of 181.5 mW cm −2 and great durability over 60 h charge–discharge cycles.
✓ 已验证
产品关联
DOI
高影响因子
DIAMOND AND RELATED MATERIALS
·
2023
·
IF 4.1
Shuanghui Zeng,Xue Wang,Yunqian Zhang,Jiaojing Shao,Zhao Ding,Jie Zhao
A free-standing 3D core/shell composite material CNTs@Co 9 S 8 on nickel mesh has been prepared by a simple two-step method. Carbon nanotubes (CNTs) grown vertically on the surface of nickel mesh by chemical vapor deposition (CVD) method act as conductive skeleton. Then Co 9 S 8 nanosheets uniformly aligned on the surface of the CNTs by solvothermal method are interconnected to form a honeycomb structure . Owing to the close contact of the CNTs@Co 9 S 8 hybrid with the nickel mesh and the hierarchical 3D porous structure , the prepared Ni@CNTs@Co 9 S 8 electrodes exhibit low resistance and excellent charge storage capability with a specific capacitance of 1305.4 F g −1 at 1 A g −1 . The composite delivers an excellent rate capability with 84.3 % capacitance retention at 10 A g −1 . An asymmetric supercapacitor composed of Ni@CNTs@Co 9 S 8 and nitrogen-doped carbon nanotubes (NCNTs) shows an energy density of 23.8 Wh kg −1 and a high power density of 8007.4 W kg −1 . The specific capacitance of the ASC device remained 87.31 % after 10,000 charge-discharge cycles and two tandem ASCs can power two red LED diodes for at least 7 min, suggesting the potential application of the obtained free-standing electrode for supercapacitors .
✓ 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）