Nanomaterials
·
2023
·Vol. 13
·期 19
·2621
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IF 5.3
Yulong Tang,Jiangning Li,Zhiyi Lu,Yunan Wang,Kai Tao,Yichao Lin
Water electrolysis is a compelling method for the production of environmentally friendly hydrogen, minimizing carbon emissions. The electrolysis of water heavily relies on an effective and steady oxygen evolution reaction (OER) taking place at the anode. Herein, we introduce a highly promising catalyst for OER called CoSe2@NiFeOOH arrays, which are supported on nickel foam. This catalyst, referred to as CoSe2@NiFeOOH/NF, is fabricated through a two-step process involving the selenidation of a Co-based porous metal organic framework and subsequent electrochemical deposition on nickel foam. The CoSe2@NiFeOOH/NF catalyst demonstrates outstanding activity for the OER in an alkaline electrolyte. It exhibits a low overpotential (η) of 254 mV at 100 mA cm−2, a small Tafel slope of 73 mV dec−1, and excellent high stability. The good performance of CoSe2@NiFeOOH/NF can be attributed to the combination of the high conductivity of the inner layer and the synergistic effect between CoSe2and NiFeOOH. This study offers an effective method for the fabrication of highly efficient catalysts for an OER.Keywords:oxygen evolution reaction;NiFeOOH;water electrolysis;selenidation;CoSe2
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
DALTON TRANSACTIONS
·
2021
·Vol. 50
·期 19
·6650-6658
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IF 4.39
Xiaoqiang Du,Jiaxin Li,Kaicheng Tong,Xiaoshuang Zhang
Exploiting environmentally friendly and robust electrocatalysts for overall water splitting is of utmost importance in order to alleviate the excessive global energy consumption and climate change. Herein, a simple phosphoselenization method was used to prepare Co2P and CoSe2 coupled nanosheet and nanoneedle composite materials on nickel foam (Co2P/CoSe2/NF). Density functional theory calculations showed that Co2P had a higher water adsorption energy compared with CoSe2, indicating that H2O molecules are strongly adsorbed on the active sites of Co2P, which speeds up the kinetic process of water splitting. The Co2P/CoSe2-300 material displayed superior electrocatalytic activity for both the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) in an alkaline medium. It's worth noting that the Co2P/CoSe2-300 composite material nanoarrays merely needed an ultralow overpotential of 280 mV to drive a current intensity of 100 mA cm−2 for OER. In addition, when a two-electrode system was constructed for overall water splitting, the current intensity of 20 mA cm−2 could be reached while requiring an ultrasmall cell voltage of 1.52 V, which is one of the best catalytic activities reported up to now. Experimental and density functional theory calculations showed that the superior electrocatalytic performance of Co2P/CoSe2-300 could be attributed to its higher electron-transfer rate, higher water adsorption energy, and the synergistic effect of Co2P and CoSe2. Our work provides a novel approach for the one-step construction of composite materials as environmentally friendly and inexpensive water splitting catalysts.
研究领域:
材料科学
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能源化学
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计算化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Catalysts
·
2019
·Vol. 9
·期 7
·616
·
IF 3.444
Ruizhou Gan,Xiaohua Ma,Guorong Wang,Zhiliang Jin
CoSe2,as a kind of co-catalyst, would replace noble metals element to dope pure CdS. The CoSe2/CdS photocatalyst could be synthesized by simple physical mixing. With the introduction of CoSe2, especially 30% CoSe2/CdS, hydrogen production would be about 500 μmol within 5 h, five times that of pure CdS under the same conditions. The CoSe2/CdS photocatalyst could bear four cycles of hydrogen evolution and sustain the hydrogen production, with a minor decrease. In other words, the electron transition velocity would surge along with the introduction of CoSe2particles. The CoSe2could be deemed as the predator and exit of electrons to inspire the detachment of the hole-electron pairs and relieve the recombination of the hole-electron pairs.Keywords:CoSe2clusters;CdS nanorod;hydrogen evolution;photocatalysis
研究领域:
材料科学
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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
·
2024
·
IF 8.1
Shuaiqiang Liu,Yu Li,Yan Yue,Xingxing Jiang,Chuanmin Ding,Junwen Wang,Donghong Duan,Qinbo Yuan,Xiaogang Hao,Shibin Liu
Oxygen evolution reaction (OER) is an important half-reaction of many actual processes, which has the slow kinetics of four-electron process. Interface engineering as an effective method can accelerate the slow kinetics of oxygen evolution reaction. In this paper, CoSe 2 –MoSe 2 porous nanosheet arrays with heterostructures were synthesized on carbon cloth by ion exchange and vapor phase selenization using Co-MOF as template. Due to the porous two-dimensional structure, the electron diffusion path is shortened and the self-supporting electrode has excellent conductivity. When catalyzing OER in 1 M KOH solution, the CoSe 2 –MoSe 2 delivers an overpotential of 278 mV at 10 mA cmm 2 , and Tafel slope of 61.2 mV dec −1 , making catalytic activity a better result than commercial RuO 2 . In addition, the decay of the catalytic activity is negligible after 24 h of continuous electrolysis. This work provides a method for the design of porous bimetallic selenide self-supporting oxygen evolution electrocatalysts.
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 Materials Chemistry A
·
2025
·
IF 9.5
Fayun Wei,Fanghua Liang,Yanrui Zhao,Zhuyu Ji,Ruiqing Li,Hui Liu,youchao Kong,Honggang He,Weichun Huang,Chunyan Cao,Wei Zhang,Bin Fei,Mingzheng Ge,Tingting Yan
High-capacity conversion-type anodes with high volume expansion and low conductivity face limitations in meeting the high energy density demands of lithium-ion batteries. Herein, MOF-derived CoSe2/ZnSe bimetallic selenide nanoparticles are confined in layered Ti3C2Tx MXene (CoSe2/ZnSe@MX) as electrodes for high-performance lithium-ion batteries by in-situ self-assembly and selenization strategy. The interconnected conductive MXene networks not only can provide highways for charge transfer, but also can effectively accommodate the large volume expansion, improving the structural stability. Meanwhile, the bimetallic CoSe2/ZnSe nanoparticles with heterostructures and Se vacancies offer abundant redox reaction sites, promote Li-ions diffusion, and enhance Li-ions adsorption. Thus, the CoSe2/ZnSe@MX electrodes exhibit a remarkable capacity of 830.8 mAh g-1 at 0.1 A g-1, high-rate capability of 290.8 mAh g-1 at 5 A g-1, and superior cycling stability with 63.1% capacity retention after 2000 cycles. Furthermore, the full cell was demonstrated practical applicability with a high capacity of 156 mAh g-1 at 0.1 C. This facile technique is promising to construct high-performance energy storage devices.
研究领域:
材料科学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2022
·
IF 9.965
Lijuan Yang,Yujie Zhao,Lijun Zhu,Daohong Xia
Superionic conductors regulated transition metal chalcogenides are the newly emerged electrocatalyst in water electrolysis into clean hydrogen and oxygen. However, there is still much room for the development of structural design, electronic modulation and heterogeneous interface construction to improve the overall water splitting performance in pH-universal solutions, especially in alkaline and neutral mediums. Herein, using β-cyclodextrin (β-CD) and citric acid (CA) organics with abundant hydroxyl (–OH) and carboxyl (–COOH), a special Ag 2 Se nanoparticles-decorated CoSe 2 flower-like nanosheets loaded on porous and conductive nickel foam substrate (Ag 2 Se-CoSe 2 /NF) was successfully constructed by a new method of monometallic cation release of coordinated cobalt. The Ag 2 Se phase exerts the nature characteristics of superionic conductors to modulate the morphological and electronic structures of CoSe 2 as well as improve its conductivity. The generated rich active interfaces and abundant Se vacancy defects facilitate numerous active sites exposure to accelerate the hydrogen ion transport and charge transfer. Compared to the single-phase Ag 2 Se/NF-8 and CoSe 2 /NF, the prepared Ag 2 Se-CoSe 2 /NF-8 with a two-phase synergistic effect achieves an outstanding pH-universal electrocatalytic hydrogen production performance by water electrolysis, as evidenced by a lower overpotential (60 mV, 212 mV and 85 mV vs RHE at 10 mA cm −2 for pH = 0.36, 7.00 and 13.70, respectively). Only a voltage of 1.55 V at 10 mA cm −2 is required to implement the overall water splitting in an alkaline electrolyzer. This work provides significant guidance for the future designation and practical development of transition metal chalcogenides with superionic conductors applied in the electrocatalytic field.
研究领域:
材料科学
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电催化
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能源转换
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2020
·Vol. 9
·期 1
·228-237
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IF 7.059
Shuxia Liu,Shatila Sarwar,Jingyi Wang,Huaiping Zhang,Tianbao Li,Jujie Luo,Xinyu Zhang
Porous CoSe2 nanosheets prepared via a one-step microwave method can be considered an excellent electrode material and the associated electrochemical properties were evaluated. The porous CoSe2 nanosheets revealed admirable electrochemical properties in terms of high specific capacitance (333 F g−1 when the current density is 1 A g−1) and excellent enduring stability (100.97% of the initial specific capacity over 25 000 cycles at 5 A g−1). An asymmetric supercapacitor (CoSe2-anode, AC-cathode) was assembled, offering good properties accompanied by an energy density of 18.9 W h kg−1 when the power density reached 387 W kg−1. These impressive results are obtained largely on account of the porous structure of CoSe2, which provides a path for ion transport, and the introduction of Se into CoSe2, which offers high electrical conductivity, further enhancing the electrochemical performance.
研究领域:
材料科学
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电化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Jiangshan Gao,Yide Hao,Shuyan Lin,Ziming Zhang,Huifang Li,Yan He
The microstructure of carbon nanotubes (CNTs) plays a pivotal role in determining their performance as electrode materials. Herein, CNTs encapsulating NiSe 2 /CoSe 2 nanoparticles (CNT@NiCo-Se) are derived from Ni-Co Prussian blue analogue (Ni-Co PBA), and the CNTs possess smaller diameter and larger interlayer spacing due to the “etching and isolation technique” that is adopted to prevent the accumulation of Ni/Co in Ni-Co PBA during the calcination process. CNT@NiCo-Se exhibits a specific capacity of 105.1 mAh g −1 at a current density of 1 A g −1 , which is 375 % higher than that obtained without isolation strategy, which resulted in the microstructure advantages of smaller diameter and larger interlayer spacing. The actual reason is that smaller diameter and larger interlayer spacing correspond to higher charge transfer density and increased the –OH binding energy (OHBE) according to density functional theory (DFT) calculation results. In addition, the assembled asymmetric supercapacitor (ASC) device exhibits a high energy density of 46.3 Wh kg −1 at 801 W kg −1 and a high power density of 8000 W kg −1 at an energy density of 12.0 Wh kg −1 , and the initial specific capacitance of 80.4 % can be maintained after 10,000 cycles at 10 A g −1 . More importantly, this work provides a novel strategy for microstructure adjustment of CNTs in the field of energy storage and conversion.
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
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Ao Zhou,Wenwen Cai,Weijian Guo,Jizhen Ma,Yueqing Wang,Jintao Zhang
Designing highly effective, low-cost bifunctional electrocatalysts without noble metals for overall water splitting remains a significant challenge. In this work, interfacial coupling of Ce-doped CoSe 2 nanoneedle arrays with MXene (Ce-CoSe 2 /MXene) is developed via the facile hydrothermal and selenization methods. The extensive specific surface area and favorable hydrophilicity of Ti 3 AlC 2 , combined with the optimized electronic structure and abundant active sites from Ce-doping and selenization, contribute to the exceptional bifunctional electrocatalytic performance of the Ce-CoSe 2 /MXene electrode. Specifically, this heterostructure achieves a low hydrogen evolution reaction (HER) overpotential of 34 mV at 10 mA cm −2 , an oxygen evolution reaction (OER) overpotential of 279 mV at 100 mA cm −2 , and an overall water splitting (OWS) potential as low as 1.45 V at 10 mA cm −2 . In-situ Raman spectroscopy reveals that surface reconstruction would improve catalytic activity and stability. Theoretical calculations indicate that the Ce-CoSe 2 /MXene can improve the adsorption of intermediates and facilitate HER/OER process by lowering the kinetic barrier, thereby enhancing electrocatalytic activity. This research marks a substantial advancement in the development of low-cost, efficient electrocatalysts for overall water splitting.
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 COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Shaowu Yuan,Yihui Wu,Le Huang,Zejie Zhang,Wenjing Chen,Yuxin Wang
Coupling the hydrogen evolution reaction (HER) with the urea oxidation reaction (UOR) represents a highly promising energy-saving strategy for hydrogen production. However, the development of cost-effective and high-performance bifunctional electrocatalysts remains a challenge. In this study, a Ni 0.85 Se/CoSe 2 heterojunction was constructed via electrodeposition, leveraging interfacial synergy to significantly enhance catalytic performance. Experimental results demonstrated that the heterojunction interface between N i0.85 Se and CoSe 2 greatly improved charge transfer efficiency, optimized the adsorption free energy of H* during HER, and accelerated water dissociation. In situ characterizations and theoretical calculations further revealed that the formation of CoSe 2 facilitated the reconstruction of Ni 0.85 Se, generating more active sites, lowering the kinetic barriers of UOR, and optimizing the adsorption of reaction intermediates on Ni sites. The Ni 0.85 Se/CoSe 2 catalyst exhibited HER and UOR overpotentials of 102 mV and 1.292 V at 10 mA·cm −2 , respectively, with a urea-assisted electrolytic hydrogen production voltage of only 1.348 V at 10 mA·cm −2 . This study provides an innovative strategy for designing high-efficiency bifunctional electrocatalysts.
研究领域:
材料科学
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能源化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MATERIALS RESEARCH BULLETIN
·
2019
·
IF 3.355
Long-Cheng Zhang,Min-Qiang Wang,Hao Chen,Heng Liu,Ying Wang,Long-Zhen Zhang,Guo-Rong Hou,Shu-Juan Bao
Large-scale electrochemical water splitting is hindered by the sluggish oxygen evolution reaction (OER) kinetics. In this work, we report a vertically standing Fe 3 O 4 -FeSe/CoSe 2 hierarchical structure material grown on carbon cloth as a highly active OER electrocatalyst . Benefiting from the rock-like Fe 3 O 4 particles on the carbon cloth, the CoSe 2 nano-arrays are more firmly affixed onto the carbon cloth. In addition, small amount of FeSe particles adsorbed on the CoSe 2 arrays offer a synergistic advantage, in which CoSe 2 achieved a small 279 mV overpotential at a current density of 10 mA cm −2 and a low Tafel slope of 68.78 mV dec −1 . By comparing the performance of Fe 3 O 4 -FeSe/CoSe 2 with pure CoSe 2 and Fe 3 O 4 -FeSe, it demonstrates to be the most efficient OER catalyst. Significantly, the hierarchical structural strategy of fixed Fe 3 O 4 growth on carbon cloth arrays introduces a new concept to explore the design of high efficiency OER electrocatalysts.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2017
·Vol. 5
·期 9
·4513-4526
·
IF 8.867
Hongmei Li,Xing Qian,Changli Zhu,Xiancai Jiang,Li Shao,Linxi Hou
Tubular-structured nanomaterials with tailorable crystal structures and shell architectures whose properties can be tuned without changing their chemical compositions are attractive in electrochemical energy conversion and storage fields. Herein, we report the fabrication of tubular-structured orthorhombic CoSe2 (o-CoSe2) and cubic CoSe2 (c-CoSe2) by calcining monoclinic Co3Se4 nanotubes (Co3Se4 NTs) prepared by a facile precursor transformation method. Benefiting from advantageous structural features, including functional shells and well-defined interior voids, the tubular-structured o-CoSe2 showed a high power conversion efficiency of 9.34% as a counter electrode catalyst for dye-sensitized solar cells (DSSCs), superior to that of a Pt counter electrode (8.15%), under AM 1.5 G irradiation. In addition, the o-CoSe2 nanotubes also demonstrated excellent electrocatalytic activity in terms of low onset overpotential (∼54 mV) and small Tafel slope (∼65.9 mV per decade) as a hydrogen evolution reaction (HER) catalyst in alkaline medium. Hence, this work provides a promising strategy to selectively design and synthesize highly active electrocatalysts for energy conversion.
研究领域:
材料科学
·
电化学
·
能源转换与存储
✓ 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）