Journal of Energy Chemistry
·
2018
·
IF 3.886
Yanghui Deng,Cui Ye,Guo Chen,Baixiang Tao,Hongqun Luo,Nianbing Li
Hydrogen evolution reaction (HER) is a prospective method to generate pure hydrogen. The development of superior electrocatalysts based on earth-abundant materials, plays a critical role in the future. CoSe 2 , one of the earth-abundant electrocatalysts, has been proved to be a promising catalyst for hydrogen generation . In our work, flower-like CoSe 2 nanorods with high quality are successfully synthesized through a facile ethylenediaminetetraacetic acid ligand (EDTA)-assisted hydrothermal process. The flower-like CoSe 2 nanorods show the brilliant electrochemical HER performance with 100 mA cm −2 at overpotential of 273 mV, a small Tafel slope of 35 mV dec −1 and strong durability in acid solution. The sparkly HER catalytic activity of CoSe 2 can be ascribed to its particular structure with large surface area and abundant active sites. Therefore, this work offers an outstanding candidate for improving hydrogen production capabilities by water electrolysis .
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
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Shuaihu Ma,Lin Zhu,Kang Liu,Cao Liu,Zhilou Liu,Jixiang Xu,Jishu Han,Hui Liu,Lei Wang,Shu Yang
Metal selenides have been demonstrated as promising Hg 0 adsorbents, while their poor high temperature activity impedes their application feasibility in non-ferrous smelting flue gas. Herein, highly well-dispersed CoSe 2 nanoparticles were immobilized on the inner of carbon layer via an in-situ carbon coating strategy, consequently demonstrating improved Hg 0 removal performance. Compared to CoSe 2 , CoSe 2 /NC exhibited remarkably higher mercury removal activity, which may be attributed to more active sites (Co 3+ , Se 2 2- ) exposed between carbon interfaces and CoSe 2 . More significantly, CoSe 2 /NC with a moderate carbonization temperature of 500℃ could maintain its stable Hg 0 removal activity at a wide operating temperature range (60–240 °C). The saturation adsorption capacity of CoSe 2 /NC-500 could achieve 510.48 mg·g −1 at 180 °C. The outstanding adsorption activity at elevated temperature is mainly attributed to the thermostability of active Se species immobilized in the carbon layer by both space constraint and chemical interaction, leading to the enhanced mercury diffusion migration energy barrier from 0.41 to 0.79 eV on CoSe 2 . The present study aims to take an important step toward the rational design of selenium-based adsorbents for mercury removal from nonferrous smelting flue gas through the excellent protective properties of carbon coating.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2019
·Vol. 48
·期 12
·4015-4025
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IF 4.052
Haiyu Wang,Zhiliang Jin,Xuqiang Hao
The development of a highly active and stable non-noble-metal hydrogen-producing catalyst for renewable energy reserves and conversion remains a serious challenge. In this work, we described a novel binary solution (DETA/H2O) reaction for preparing a composite catalyst composed of CdS nanoparticles grown on CoSe2 nanobelts. The composite catalyst (CoSe2/CdSDETA) exhibits excellent catalytic activity for a hydrogen evolution reaction in an EY sensitized 15% (v/v) TEOA aqueous solution under visible light irradiation (λ ≥ 420 nm). Moreover, the catalytic activity of the P-doped sample (CoSe2/CdSDETA|P) was further improved. The excellent performance is ascribed to the synergy among DETA and atomic-level P-doping. Some essential characterization methods such as XRD, SEM, TEM, UV-vis diffuse spectroscopy, XPS, photoelectrochemistry, PL, etc. were carried out to support the related results and a possible reaction mechanism was put forward.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Sustainable Energy & Fuels
·
2022
·Vol. 6
·期 23
·5392-5399
·
IF 6.813
Muhammad Rauf,Ling Yang,Jingwen Wang,Hongwei Mi,Qianling Zhang,Peixin Zhang,Xiangzhong Ren,Yongliang Li
Electrodeposition is a facile and scalable strategy to prepare free-standing oxygen evolution reaction (OER) electrodes with promising electrocatalytic activity, high active site utilization, and fast mass transportation. In this study, hierarchical CoSe2–NiSe2 heterostructured nanosheets were electrodeposited on three-dimensional Ni foam (NF) via deliberate interface engineering using a two-step potentiostatic route. Morphological analysis confirms that CoSe2–NiSe2 has a hierarchical nanosheet-like morphology, and the surface is composed of NiSe2 (210) and CoSe2 (210) planes. The heterostructure CoSe2–NiSe2/NF electrocatalyst has a remarkably improved OER performance with a low overpotential of 160 mV at 10 mA cm−2 in alkaline media compared to the monometallic Co-based electrocatalyst CoSe2/NF (290 mV@10 mA cm−2) and Ni-based electrocatalyst NiSe2/NF (310 mV@10 mA cm−2). Thus, the strong interface interaction between CoSe2 and NiSe2 in heterostructured CoSe2–NiSe2/NF is essential for high OER performance. Furthermore, the heterostructured electrocatalyst exhibits high stability during 2000 potential cycles and a 5 h chronoamperometric test. The excellent OER performance is attributed to the high electrochemical active area and synergistic effect of the bimetallic selenide-heterojunction. This work offers a facile and scalable strategy for exploiting synergistic electrocatalysis based on heterostructured electrocatalysts, as well as novel instances for the utilization of efficient, low-cost, and non-toxic electrocatalysts in the water-splitting 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
CARBON
·
2023
·
IF 10.9
Chunlei Dong,Dengchen Li,Huiya Wang,Bo Cai,Yue Xin,Hualong Peng,Yong Zhao,Nü Wang,Zhimin Cui,Guangsheng Wang
Rational design the composition and structure is an effectual measure to develop the high-performance electromagnetic (EM) wave absorbing materials. In this work, core-shell structured CoSe 2 @polythiophene (CoSe 2 @PTh) composites are synthesized via a simple hydrothermal followed by in-situ polymerization process. Benefiting from the conductive network increased by conductive polymer incorporation, interfacial effects caused by core-shell structure and multi-component optimizing the impedance matching, the EM absorption performance of samples is significantly improved. The minimum reflection loss (RL min ) value of −49.60 dB and the effective absorption bandwidth (EAB) of 4.20 GHz are obtained for CoSe 2 . After cladding, the CoSe 2 @PTh possesses RL min of −55.40 dB and broadened EAB of 5.8 GHz at 10 wt% filling amount. This work broadens the application of transition metal selenide in EM absorption, such as MnSe 2 and NiSe 2 , and provides an eco-friendly and convenient way to construct core-shell structure and multi-component for lightweight broadband EM absorbing materials.
研究领域:
材料科学
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电磁学
✓ 已验证
产品关联
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2022
·Vol. 9
·期 8
·1743-1751
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IF 7.779
Hao Wang,Yuruo Qi,Fangyuan Xiao,Pan Liu,Yi Li,Shu-juan Bao,Maowen Xu
The construction of highly conductive structures with excellent adsorption–catalytic properties to accelerate electron transfer and suppress polysulfide shuttle is considered as an effective strategy to achieve well-performing sodium–sulfur batteries. Herein, a self-supported tessellated N-doped carbon/CoSe2 (NCCS) is developed as a sulfur host for sodium–sulfur batteries by a simple deposition–selenization of lyophilized bacterial cellulose (BC), where NC acts as a conductive network to ensure the rapid initiation of efficient catalytic reactions at the tessellated CoSe2 interface and maintain good structural stability. The CoSe2 nanoparticles provide strong ability in anchoring, trapping and catalyzing polysulfides. As a result, the prepared tessellated NCCS@S cathode demonstrates a high initial discharge specific capacity of 871.3 mA h g−1 at a current rate of 0.1C and good electrochemical stability for up to 500 cycles at 1C.
研究领域:
材料科学
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电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2023
·
IF 9.9
Xinyu Zheng,Ying Peng,Shengjie Xu,Longhui Huang,Yu Liu,Di Li,Jianjun Zhu,Deli Jiang
Designing effective, robust, and low-cost catalysts for oxygen evolution reaction (OER) is an urgent requirement yet challenging task in water electrolysis. In this study, a NiCoP-nanocubes-decorated CoSe 2 nanowires arrays three-dimensional/two-dimensional (3D/2D) electrocatalyst (NiCoP-CoSe 2 -2) was developed for catalyzing OER via a combined selenylation, co-precipitation, and phosphorization method. The as-obtained NiCoP-CoSe 2 -2 3D/2D electrocatalyst exhibits a low overpotential of 202 mV at 10 mA cm −2 with a small Tafel slope of 55.6 mV dec −1 , which is superior to most of reported CoSe 2 and NiCoP-based heterogeneous electrocatalysts. Experimental analyses and density functional theory (DFT) calculations proof that the interfacial coupling and synergy between CoSe 2 nanowires and NiCoP nanocubes are not only beneficial to strengthen the charge transfer ability and accelerate reaction kinetics, but also facilitate the optimization of interfacial electronic structure, thereby enhancing the OER property of NiCoP-CoSe 2 -2. This study offers insights for the investigation and construction of transition metal phosphide/selenide heterogeneous electrocatalyst toward OER in alkaline media and broadens the prospect of industrial applications in energy storage and conversion fields.
研究领域:
材料科学
·
电化学
·
能源存储与转换
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2024
·Vol. 35
·期 10
·1-10
·
IF 2.8
Niu Shengtao,Xu Zhiqiang,Kang Xiaoya,Zhao Lei,Zou Rong,Liu Wenwu,Ran Fen
The problematic polysulfide shuttle effect, slow redox kinetics of lithium polysulfides conversion, and low conductivity impede the prospects of lithium-sulfur battery applications. To address these issues, a unique rod-like CoSe 2 nanoparticle decorated flake MXene (MXene@CoSe 2 ) emerges as a promising host material for the design of advanced batteries. Here, we use a hydrothermal synthesis strategy to grow CoSe 2 nanorods in situ on the surface of flake MXene. By comparing the electrochemical properties of MXene@CoSe 2 electrodes with Mxene@Co electrodes, it is determined that the MXene@CoSe 2 electrode could adsorb lithium polysulfides more efficiently while accelerating the redox kinetics of lithium polysulfides to suppress the shuttle effect. As a result, the initial specific capacity at Mxene@CoSe 2 cathode could reach 1, 050.6 mAh g −1 at 0.1 C, which reaches 560.8 mAh g −1 after 100 cycles and remains at 492.9 mAh g −1 after 1, 000 cycles at 1 C, with a low average decay rate of 0.302% per cycle.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2021
·
IF 5.816
Caichi Liu,Yongchuan Hu,Fang Liu,Hui Liu,Xuewen Xu,Yanming Xue,Jun Zhang,Ying Li,Chengchun Tang
The development of highly active, durable and earth-abundant electrocatalysts toward hydrogen evolution reaction (HER) is of great significance for promoting hydrogen energy . As one of the most potential substitutes for Pt-based materials, pyrite cobalt selenide (CoSe 2 ) still has shortcomings in terms of HER performance possibly due to its unfavorable hydrogen adsorption characteristics. Metal cation doping has been considered as one of the most available methods to modulate the electronic structure of electrocatalysts. Herein, non-transition metal tin (Sn) doped CoSe 2 nanowire arrays grown on carbon cloth have been constructed and fabricated via a simple gas-phase selenization treatment of hydroxide precursor. The successful doping of Sn element into CoSe 2 nanowires was confirmed by many experimental results. The as-prepared catalyst shows an obviously enhanced HER performance in alkaline media . Compared with pristine CoSe 2 , the overpotential of Sn doped catalyst with optimal doping content decreases from 189 mV to 117 mV at 10 mA cm −2 and the Tafel slope declines from 94 mV dec −1 to 86 mV dec −1 , as well as shows long-term durability for 100 h. Experimental results and further density functional theory (DFT) calculations show that Sn doping can improve the ability of charge transfer and increase the electrochemical surface area, as well as optimize the hydrogen adsorption energy , all of which are instrumental in HER performance improvement. This work not only provides atomic-level insight into regulating the electronic structure of transition metal selenides by main group metal doping, but also broadens the avenue of developing high-efficiency and stable non-precious metal catalysts .
研究领域:
材料科学
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电催化
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Zongli Liu,Tian Wang,Pu Chang,Lixiu Guan,Xiaohu Wang,Chao Xu,Yingxuan Cao,Junguang Tao
Although electrocatalytic water splitting is a very promising and sustainable method for generating hydrogen as a clean energy source, the design and synthesis of stable and efficient noble metal-free catalysts faces some serious challenges. In this work, an electrocatalyst with heterostructure of MoS 2 and orthogonal phase of CoSe 2 (MoS 2 @o-CoSe 2 ) is derived from Co-based metal organic framework (Co-MOF). The complex shows excellent hydrogen evolution reaction (HER) activity and long-term stability in alkaline medium attributed to its porous structure , ultrathin nanosheet morphology, synergistic effect of each component owing to the tightly bonded interface and optimal electronic structure after phase transition. MoS 2 @o-CoSe 2 exhibits low overpotential of 34 mV at a current density of 10 mA cm −2 and a Tafel slope of 41 mV dec −1 . These results are superior to most recently reported Mo-based and Co-based electrocatalysts. Importantly, the performance of MoS 2 @o-CoSe 2 at high current densities is even better than that of commercial Pt/C electrode. Our results emphasize the importance of phase engineering and show that the combination of MOF with transition metal disulfides is an effective way to develop highly active and sustainable efficient electrocatalysts for water hydrolysis.
研究领域:
材料科学
·
能源化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Jingyi Wang,Shatila Sarwar,Jun Song,Lijun Du,Tianbao Li,Yaodong Zhang,Baobi Li,Qingping Guo,Jujie Luo,Xinyu Zhang
The work reports the fabrication of CoSe 2 @NiSe 2 nanoflowers on nickel foam substrates via one-step microwave method, in which the Ni foam serves as a skeleton and a nickel source. The as-prepared CoSe 2 @NiSe 2 nanoflowers display high capacitance value of 1434 F g −1 at the current density of 1 A g −1 and excellent cycling performance of 87.5% retention after 20,000 cycles at 10 A g −1 . In addition, the supercapacitor device using CoSe 2 @NiSe 2 nanoflowers as the positive electrode and activated carbon (AC) as the negative electrode not only can exhibit wide voltage window of 1.6 V, but also deliver a maximum high energy density of 20.4 Wh Kg −1 at power density of 798 W Kg −1 and 86.6% of capacity retention after 20,000 cycles.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
DOI
高影响因子
IONICS
·
2024
·Vol. 30
·期 6
·3279-3296
·
IF 2.4
An Ruifeng,Wang Bolun,Niu Hongkun,Liu Zhiwei,Gao Bingliang
CoSe 2 exhibits a high theoretical sodium storage capacity as an anode material for sodium-ion batteries (SIBs). However, it faces several challenges during electrochemical cycling, including the shuttle effect of sodium polyselenide, volume expansion, and poor electrical conductivity. To address these issues, this study proposes a novel approach to synthesize CoSe 2 @NC/CNTs materials using cross-linked PMMA spheres as templates. The resulting structure demonstrates a hollow core-shell configuration comprising nitrogen-doped carbon nanotubes (N-CNTs) and dispersed CoSe 2 nanoparticles. This is confirmed through characterization techniques such as XRD, Raman spectroscopy, SEM imaging, and TEM analysis, which verify the successful preparation. Moreover, XPS and TG analyses reveal the presence of strong interfacial interactions within the structure. These unique structural features enable CoSe 2 @NC/CNTs to exhibit exceptional sodium storage performance: remarkable stability (after 5000 cycles at 20 A·g −1 , the specific capacity only slightly decreases from 320 to 280 mAh·g −1 with a minimal degradation rate of 0.8% per cycle) and practicality (the specific capacity of the full battery NTO||CoSe 2 @NC/CNTs assembled with sodium nickel-iron-manganate oxide (NTO-NaNi 1/3 Fe 1/3 Mn 1/3 O 2 ) remains at 323 mAh·g −1 after 120 cycles at a high current intensity of 5 A·g −1 ). Additionally, we elucidate the intrinsic reason behind the strong stability of CoSe 2 @NC/CNTs through SEM and EDS analysis after cycling while also providing ex situ characterization to explain their sodium storage.
研究领域:
材料科学
·
电化学
✓ 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）