Journal of Materials Chemistry A
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2024
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IF 10.7
Yujie Wei,Jianying Wang,Yahang Shang,Chang Lv,Xiaoyang He,Tao Wang,Zuofeng Chen,Lvlv Ji,Sheng Wang
Transition metal dichalcogenides are recognized as promising electrocatalysts for hydrogen evolution reaction (HER), but their catalytic performances still require further enhancement. Herein, Ru-doped cubic CoSe2 with leaf-like microarray hollow structure supported on carbon cloth (Ru-c-CoSe2@CC) is rationally fabricated via a strategy involving in situ growth of Co-ZIF, Ru3+ ions etching and selenization steps. The chemical etching step transforms the precursor sample from Co-ZIF to RuCo-LDH and the subsequent selenization step observes crystal phase transformation and Ru-doping of CoSe2 to form Ru-c-CoSe2. Compared with orthorhombic CoSe2 and pristine c-CoSe2, the optimized electrocatalyst Ru-c-CoSe2/CC-3 shows significantly enhanced HER catalytic performance in both acidic and alkaline media. Theoretical investigations demonstrate the charge-transfer redistribution triggered by Ru dopants, optimizing the electronic states of the adjacent Co atoms with boosted intrinsic catalytic activity. Additionally, the leaf-like microarray hollow structure is highly desirable in active site expose and mass transfer due to its superaerophobic interfacial property.
研究领域:
材料科学
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电化学
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催化
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能源材料
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Chuanqi Feng,Chengbao Ge,Rongxiao Ma,Yebang Zhou,Lumin Wang,Dashuai Zhang,Zhong-Zheng Gao,Shaohong Zhang,Kang Wang,Peng Zhang,Zhaohui Huang,Bijiang Geng
Single metal chalcogenide catalysts still face challenges of insufficient catalytic active sites and slow catalytic reaction kinetics for oxygen evolution reactions (OER). Herein, a novel CoS@CoSe 2 heterojunction composite catalyst was constructed through heterojunction interface engineering strategy. The single-crystal CoSe 2 nanorods were successfully epitaxially grown on the surface of amorphous CoS nanoblocks by a two-step hydrothermal cascade in-situ growth technique. Benefiting from the interface coupling and synergistic effect of the CoS@CoSe 2 heterojunction, the designed electrocatalyst exhibited outstanding catalytic activity for OER, attaining a current density of 10 mA cm −2 with a low overpotential of only 115 mV, surpassing other reported chalcogenide electrocatalysts. Density functional theory (DFT) calculations revealed that the work function difference between CoS and CoSe 2 induces directional redistribution of charges at the heterojunction interface, rendering the CoSe 2 surface electron-deficient, thereby significantly optimising OH⁻ adsorption energy. Simultaneously, the heterojunction structure significantly enhances the total density of states around the Fermi level while also improving the d -band center of metallic active sites. These modifications promote more favorable adsorption of reaction intermediates, effectively reduce the energy barrier for the OER, accelerate reaction kinetics, and ultimately improve the overall catalytic performance. This study presents a promising strategy for the rational design and development of high-performance catalytic materials.
研究领域:
材料科学
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电化学
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纳米技术
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催化
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能量存储与转换
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产品关联
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2021
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IF 4.464
Chengchao Wang,Weigang Zheng,Ze Wang,Zheng-Zhi Yin,Yong Qin,Yong Kong
We report on the facile synthesis of graphene oxide (GO) supported CoSe 2 (CoSe 2 /GO) used for high-performance supercapattery electrodes. CoSe 2 is first synthesized through the selenylation of a typical zeolitic imidazolate framework (ZIF-67), which is then decorated on the surface of GO via the hydrothermal method. The characterizations of SEM, TEM, XRD and XPS further confirm the successful decoration of GO with CoSe 2 . The electrochemical performances of the as-synthesized CoSe 2 /GO are investigated, and the results indicate that the CoSe 2 /GO exhibits considerable specific capacity (108.31 mAh g −1 at 1 A g −1 ) and high cyclic stability (capacity retention of 91.2% after 5,000 cycles). Compared with GO and CoSe 2 alone, the greatly enhanced electrochemical performances of the CoSe 2 /GO might be attributed to the synergistic effect of GO and CoSe 2 . These findings suggest that the developed CoSe 2 /GO could be a potential candidate to be used as high-performance supercapattery electrode materials.
研究领域:
材料科学
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能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
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2023
·Vol. 13
·期 5
·865
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IF 5.3
Yinbo Wu,Yaowei Feng,Xiulian Qiu,Fengming Ren,Jian Cen,Qingdian Chong,Ye Tian,Wei Yang
Lithium-sulfur batteries with high theoretical energy density and cheap cost can meet people’s need for efficient energy storage, and have become a focus of the research on lithium-ion batteries. However, owing to their poor conductivity and “shuttle effect”, lithium-sulfur batteries are difficult to commercialize. In order to solve this problem, herein a polyhedral hollow structure of cobalt selenide (CoSe2) was synthesized by a simple one-step carbonization and selenization method using metal-organic bone MOFs (ZIF-67) as template and precursor. CoSe2is coated with conductive polymer polypyrrole (PPy) to settle the matter of poor electroconductibility of the composite and limit the outflow of polysulfide compounds. The prepared CoSe2@PPy-S composite cathode shows reversible capacities of 341 mAh g−1at 3 C, and good cycle stability with a small capacity attenuation rate of 0.072% per cycle. The structure of CoSe2can have certain adsorption and conversion effects on polysulfide compounds, increase the conductivity after coating PPy, and further enhance the electrochemical property of lithium-sulfur cathode material.Keywords:lithium-sulfur battery;transition metal selenides;metal-organic framework;polypyrrole;sulfur host
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2022
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IF 14.224
Yuxuan He,Jin Qian,Peifang Wang,Bianhe Lu,Sijing Tang,Jianfeng Li,Yin Liu,Pan Gao
In recent years, many efforts have been made to modulate the interaction between carriers and nanoparticles under the integrity of the active site structure. Herein, SrFeO 3 @CoSe 2 nanocomposite was fabricated by loading CoSe 2 onto SrFeO 3 particles with a perovskite structure in the form of an encapsulation. The optimized SFO@CS-0.3 catalyst exhibited high catalytic activity in photo-peroxymonosulfate-based reaction and the catalyst was structurally stable over a wide temperature range. Characterization and theoretical results demonstrated that the charge in the SrFeO 3 was transferred from Fe to Co cation of the CoSe 2 via the interfacial oxygen atom. Moreover, the newly established oxygen-metal structure (Fe-O v -Co) acted as a catalytic site, accelerating the cleavage of the peroxymonosulfate bond to generate radicals, which were desorbed into solution to attack the contaminant. Simultaneously, the heterojunction constructed by the catalyst underwent internal electron transfer under visible light, creating a field in which multiple reactive oxygen species co-oxidized organic contaminant .
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2025
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IF 4.1
Xiaoyan Yan,Shaohua Lv,Jiangjiang Li,Fei Wang,Xinxin Zhao,Xiaohua Zhang,Zhenxiang Cheng
This study focuses on the novel core-shell structured bimetallic selenide CoSe 2 @NiSe 2 /NC., and explores its application in Magnesium-ion batteries (MIBs). Through an efficient electrochemical reaction mechanism, CoSe 2 @NiSe 2 /NC material exhibits excellent performance during charge-discharge cycles, especially in terms of high-rate capability and long cycle stability. At a current density of 0.1 A g −1 , the initial specific capacity of CoSe 2 @NiSe 2 /NC material reaches 380 mAh g −1 , significantly higher than that of CoSe 2 /NC and NiSe 2 /NC materials. Additionally, CoSe 2 @NiSe 2 /NC material demonstrates favorable capacitive and diffusive contributions at different scan rates, with a stable and predictable charge transfer process, reflecting good charge/ion transport capabilities. The outstanding electrochemical performance of the CoSe 2 @NiSe 2 /NC composite is attributed to its unique core-shell architecture, which facilitates efficient charge transport and ion diffusion through interfacial coupling and electronic modulation between the CoSe 2 core and NiSe 2 shell. The material not only effectively buffers volume changes but also suppresses the pulverization and aggregation of the active material, further enhancing the structural stability of the material during long-term charge-discharge processes. Therefore, CoSe 2 @NiSe 2 /NC material provides a new research direction for efficient energy storage systems and holds significant importance for the design of future high-performance battery materials.
研究领域:
材料科学
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电化学
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能量存储
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电池技术
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产品关联
DOI
高影响因子
ACS Nano
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2021
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IF 15.881
Shuhao Xiao,Xinyan Li,Wensi Zhang,Yong Xiang,Tingshuai Li,Xiaobin Niu,Jun Song Chen,Qingyu Yan
Metal selenides are considered as a group of promising candidates as the anode material for sodium-ion batteries due to their high theoretical capacity. However, the intrinsically low electrical and ionic conductivities as well as huge volume change during the charge-discharge process give rise to an inferior sodium storage capability, which severely hinders their practical application. Herein, we fabricated In2Se3/CoSe2 hollow nanorods composed of In2Se3/CoIn2/CoSe2 by growing cobalt-based zeolitic imidazolate framework ZIF-67 on the surface of indium-based metal–organic framework MIL-68, followed by in situ gaseous selenization. Because of the CoIn2 alloy phase in between In2Se3 and CoSe2, a heterostructure consisting of two alloy/selenide interfaces has been successfully constructed, offering synergistically enhanced electrical conductivity, Na diffusion process, and structural stability, in comparison to the single CoIn2-free interface with only two metal selenides. As expected, this nanoconstruction delivers a high reversible capacity of 297.5 and 205.5 mAh g–1 at 5 and 10 A g–1 after 2000 cycles, respectively, and a superior rate performance of 371.6 mAh g–1 at even 20 A g–1.
研究领域:
材料科学
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能源存储
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2022
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IF 9.965
Hanhao Liu,Dan Li,Honglang Liu,Xu Wang,Yaoxin Lu,Chao Wang,Li Guo
Cobalt selenide , as a star material in battery industry, has attracted much attention. However, when it is applied solely in sodium ion batteries , it will cause large volume expansion and material agglomeration, which will seriously affect the overall performance of batteries. In this work, we use ice bath impregnation to combine CoSe 2 nanoparticles with porous nitrogen-doped carbon networks (NC) as advanced anodes for ultra-long cycle life sodium ion batteries (SIBs). CoSe 2 nanoparticles are evenly attached to NC with strong interfacial contacts in CoSe 2 @NC. The strong contact of CoSe 2 on the porous carbon network, along with the carbon network's unique network cross-linking structure, results in rapid electron transfer and Na ion diffusion kinetics of CoSe 2 @NC, resulting in superior electrochemical performance . Besides, we have synthesized CoSe 2 @NC with different loading by changing Co 2+ concentration. The results show that CoSe 2 @NC anode thus provides a high reversible capacity of 406 mAh/g. In addition, at high current 5 A/g, it can keep a reversible capacity of 300 mAh/g after 4500 cycles with an average capacity loss of less than 0.01 % per cycle. The excellent anchoring structure enables it to form stable solid electrolyte film (SEI) and reduce the amount of dead sodium in the first charge–discharge process, showing high Initial Coulombic Efficiency (ICE) (89.2 %). Finally, CoSe 2 @NC and Na 3 V 2 (PO 4 ) 3 (NVP) are assembled into a full cell and the results shows an ultra-long cycle stability at 0.1 A/g. This strategy will facilitate the application of transition metal selenides in next-generation energy storage systems.
研究领域:
材料科学
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能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2022
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IF 7.139
Rongyao Wang,Jie Cao,Rui Zhang,Zhengguang Sun,Feng Wang,Huimin Wu
In this paper, M-Se-L (M = Co, Ni, Fe. L = Se At%) were synthesized by solvothermal method . The results from electrochemical testing showed that Co–Se-75% (CoSe 2 ) has the highest catalytic performance among all M-Se-L. Furthermore, Ni 2 P was compounded with CoSe 2 to form a heterogeneous structure Ni 2 P/CoSe 2 /NF. And the temperature and quality of NaH 2 PO 2 during the synthesis process were optimized. It was found that the Ni 2 P/CoSe 2 /NF synthesized at 300 °C with 1.2 g NaH 2 PO 2 had better catalytic performance. Only 1.383 V is required for UOR to reach 100 mA cm −2 . In alkaline urea-water system, the electrolytic voltage of Ni 2 P/CoSe 2 /NF||Ni 2 P/CoSe 2 /NF dual-electrode electrolyzer 1.607 V required to reach 100 mA cm −2 . The present work shows that Ni 2 P/CoSe 2 /NF is an efficient bifunctional electrocatalyst with good prospects for industry applications.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2023
·
IF 7.4
Ying Wang,Xinyu Sun,Yang Liu,Shiqing Zhang,Fang Liu,Ying Li,Yanming Xue,Chengchun Tang,Jun Zhang
The development of highly efficient, long-lasting, and earth-rich electrocatalysts for hydrogen evolution processes (HER) is crucial to the advancement of hydrogen energy. Due to its improved catalytic activity, extraordinary chemical stability, and low cost, pyrite cobalt selenide (CoSe2) has become an incredibly potential replacement for Pt-based HER electrocatalysts . However, because of limited hydrogen adsorption and accompanying restrictions in its electronic structure, its practical application has run into difficulties. Herein, we have introduced aluminum (Al) into CoSe2/CC nanowire arrays on carbon cloth using a simple hydrothermal and selenization method. The synthesized materials serve as highly effective catalysts for HER, with the optimized Al-CoSe2/CC demonstrating a significantly overpotential reduced by nearly 90 mV compared to pure CoSe2/CC (from 243 mV to 153 mV) at a current density at 10 mA cm−2 and a small Tafel slope of 88 mV dec−1. Moreover, these catalysts exhibit exceptional durability, sustaining their performance for 24 h. Based on the experimental results and subsequent density functional theory (DFT) calculations, it has been demonstrated that Al doping can significantly enhance the electronic conductivity, maximize the hydrogen evolution adsorption energy, and improve the charge transfer ability. This work offers a profound insight into the correlation between cation substitution in non-precious metal-based catalysts and the enhancement of intrinsic HER catalytic performance.
研究领域:
材料科学
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电化学
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理论计算
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2019
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IF 4.084
Linghui Zhao,Jingchun Jia,Ying Chang,Meilin Jia,Zhenhai Wen
It is vital to develop a high activity, stability and inexpensive hydrogen evolution reaction (HER) catalyst for electrochemical hydrogen evolution. A high-temperature reaction approach that is Co nanocrystals on carbon support (XC-72R) and selenylation to synthetize CoSe 2 /C nanocrystals is used, and the effect of temperature on CoSe 2 /C nanocrystals is studied. The morphology and catalytic properties of CoSe 2 /C nanocrystals annealed at different temperatures are compared in 0.5 M H 2 SO 4 . The results indicated the coralline-like CoSe 2 /C-650 nanocrystals have a high performance for HER with Tafel slopes of 45.73 mV·dec −1 and onset potential of −196 mV vs. RHE. The stability maintained for at least 40 h and the Faraday Efficiency (FE) of H 2 is nearly 98%. The outstanding HER performance of CoSe 2 /C-650 is due to its characteristic cora-like frame CoSe 2 nanocrystals embedded into supernal conductive XC-72R, which not only offer affluent active reaction sites, but also boost the capacity of charge transportation in HER process.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2020
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IF 4.65
Jinkai Wang,Fang Li,Chuan Chen,Xin Liu,Tianhao Yao,Ting Liu,Lei Zhu,Xin Ji,Hongkang Wang
Surface modification via atomic layer deposition (ALD) of metal oxides ( ex. , TiO 2 ) has been suggested as an effective strategy to enhance the electrochemical performance of high-specific-capacity electrode materials. Herein, we study the lithium storage behavior of TiO 2 coated CoSe 2 nanorods (TiO 2 @CoSe 2 ), in which a thin layer of TiO 2 shell is deposited via a conventional ALD method. The effects of the TiO 2 deposition on the structural and electrochemical characteristics of the CoSe 2 nanorods are systematically investigated. When applied as anodes for LIBs , the TiO 2 @CoSe 2 electrode displays much enhanced lithium storage performance including higher specific capacity, better cycle stability and rate capability, delivering a discharge capacity of 999.2 mA h/g after 300 cycles at 200 mA/g and an exceptional capacity of 723.7 mA h/g after 430 cycles even at high current density of 500 mA/g, which is much higher than that of the bare CoSe 2 electrode (only 145.4 mA h/g after 220 cycles at 200 mA/g).
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）