JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Changming Zhang,Zhihao Liu,Yongjin Zou,Fen Xu,Lixian Sun,Zhicong Hu,Sensen Yu,Cuili Xiang
Spinel-type materials are attracting great attention as potential electrocatalysts for the hydrogen- and oxygen-evolution reactions. However, their inherent catalytic activities are not on par with those of precious-metal catalysts, and their poor stabilities continue to constrain their rapid development. In this study, we fabricated Zr-CuCo 2 S 4 nanowires and Co(OH) 2 nanosheet–nanowires using electrochemical methods, resulting in lattice defects, sulfur vacancies, and more exposed active sites that catalyze the hydrogen- and oxygen-evolution reactions. DFT calculations revealed that sulfur vacancies enhance intrinsic activity, while Zr doping reduces the energy barrier for H*–OH* adsorption, promotes the formation of additional sulfur vacancies, and modulates active-site Cu/Co valence states, which greatly enhances water-dissociation and H*-adsorption kinetics. Consequently, Zr-CuCo 2 S 4 /Co(OH) 2 requires low overpotentials of 88 and 208 mV, respectively, to support highly stable alkaline hydrogen- and oxygen-evolution reactions at 10 mA cm −2 . This study provides a rational strategy for designing low-cost spinels for green and clean energy.
研究领域:
材料科学
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电化学
·
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
Na Wu,Xiaoqiang Du
One of the most attractive means for mitigation of environmental pollution is to produce hydrogen by electrocatalytic urea splitting. In the paper, the heterogeneous interfacial rich N–CuCo 2 S 4 @Ni 3 S 2 material was in situ synthesized on nickel foam through a typical hydrothermal and sulfuration process. This N–CuCo 2 S 4 @Ni 3 S 2 electrode displays excellent urea oxidation performance (potential of 1.38 V@50 mA cm −2 ), which is one of the best reactivity reported so far. Experimental results show that the superior catalytic activity is attributed to the rapid charge transfer, more reaction center exposed and superior electrical conductivity . Density functional theory shows that this Ni 3 S 2 material accelerates the reaction rate in the catalytic process, the introduction of this N–CuCo 2 S 4 material improves the conductivity of the material, and the synergistic catalysis of the N–CuCo 2 S 4 and Ni 3 S 2 makes this N–CuCo 2 S 4 @Ni 3 S 2 material exhibit superior urea oxidation activity. Notably, long-term tests have shown a decrease in catalytic activity, which suggests that the surface of the sulfide is in situ generated to oxides or hydroxides, which are truly active species. This work provides a new idea for the development of efficient and stable urea oxidation catalysts for sulfides.
研究领域:
材料科学
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环境科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Jiangwei Shang,Shuwen Fan,Shihu Cao,Xinrui Gan,Jing Nie,Tianning Zhang,Xiangchen Li,Dan Feng,Xiuwen Cheng
In this study, a CuCo 2 S 4 microporous composite membrane (CCSM) was successfully prepared by loading CuCo 2 S 4 nanoparticles on a membrane substrate, and then used to activate PMS to degrade carbamazepine (CBZ). Meanwhile, the physicochemical properties of the nanomaterial and the effects of various reaction parameters, such as, catalyst film loads, PMS dosage, initial pH value, and co-existing substances on the catalytic degradation performance were investigated. The results showed that CCSM/PMS exhibited admirable catalytic performance, and 90.3% CBZ could be degraded within 3 min under the optimum conditions ([CuCo 2 S 4 ] = 0.05 g L −1 , [PMS]=0.30 g L −1 , [CBZ] 0 =10 g L −1 and Initial pH = 6.95). Furthermore, the CCSM/PMS system could efficiently degrade various antibiotics (sulfamethoxazole, metronidazole, hydrochloride and ciprofloxacin). In addition, the reusable ability of CCSM without significant efficiency loss after 10 cycles. The quenching experiments and electron paramagnetic resonance (EPR) characterization showed that the main active species were SO 4 • - , •OH, O 2 • - and 1 O 2, and SO 4 • - played a dominant role in this system. Finally, based on the data analysis, the study proposed the possible degradation mechanism and four degradation routes of CBZ.
研究领域:
环境科学
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催化材料
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水处理技术
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yuchen Han,Yue Han,Yuye Yan,Yingxia Zong,Ruiyang Zhao,Jishu Han,Lei Wang
Hydrogen is a secondary fuel with various characteristics that include high safety, environmental protection, high energy and cleanliness. In recent years, the use of solar energy to produce hydrogen has received extensive attention. In this paper, NiTiO 3 nanoparticles were used to modify CuCo 2 S 4 to construct hollow NiTiO 3 /CuCo 2 S 4 double-shell photocatalyst. Under the light irradiation, the optimal hydrogen evolution rate of the synthesized NiTiO 3 /CuCo 2 S 4 photocatalyst was 6.24 mmol g −1 h −1 . The experimental results indicated that the NiTiO 3 /CuCo 2 S 4 composite, featuring a hollow double-shell structure, significantly augmented the capacity for visible light absorption and further suppressed the recombination of photogenerated electrons and holes. Additionally, the formation of a Z-scheme heterojunction within the photocatalyst effectively enhanced the redox capability. The research introduced a promising Z-scheme heterojunction photocatalyst, offered innovative insights into the field of photocatalytic hydrogen evolution, thereby contributing to the conversion of solar energy into chemical fuels.
研究领域:
材料科学
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能源化学
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光催化
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2025
·
IF 4.9
Chong Sun,Qi Liu,Wenquan Jiang,Hengrui Qiu,Yongqiang Zhang,Wenxiu He
CuCo 2 S 4 sulfide is directly synthesized on nickel foam (NF) by a two-step solvothermal method. The material forms a nanoparticle array structure on conductive substrate NF. The effects of different morphologies on the electrochemical properties of the conductive and non-conductive CuCo 2 S 4 substrates and the internal mechanism of different components were studied. Various microstructures show that CuCo 2 S 4 /NF provides a large open space and a high specific surface area due to the unique nanostructure, as well as the rich porosity of NF and the support of the overall structure, which provides a rich active site for Faraday reaction, ensures the rapid transfer of ions, and provides a larger specific capacitance for bimetal synergy. The CuCo 2 S 4 /NF electrode material has A particular capacitance as high as 1013.76 F g −1 at 1 A g −1 . In addition, based on the asymmetric supercapacitor composed of CuCo 2 S 4 /NF as the positive electrode and activated carbon as the negative electrode, it has a high energy density of 44 Wh kg −1 at a power density of 800.0 W kg −1 , and the stability is 88.3 % after 10,000 cycles of 8 A g −1 .
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
MOLECULES
·
2022
·Vol. 27
·期 23
·8134
·
IF 4.927
Ran Lu,Wei Wang,Bo Dong,Chao Xu,Bo Li,Yong Sun,Junchao Liu,Biao Hong
Cardiovascular disease caused by atherosclerosis (AS) seriously affects human health. Photothermal therapy (PTT) brings hope to the diagnosis and treatment of AS, with the development of nanotechnology. To improve treatment efficiency, self-assembled CuCo2S4nanocrystals (NCs) were developed as a drug-delivery nanocarrier, triggered by near-infrared (NIR) light for efficient chemophotothermal therapy of arterial inflammation. The as-prepared self-assembled CuCo2S4NCs exhibited excellent biocompatibility and a very high chloroquine (CL)-loading content. In addition, the self-assembled CuCo2S4NCs/CL nanocomposites showed good photothermal performance, due to strong absorption in the NIR region, and the release of CL from the NCs/CL nanocomposites was driven by NIR light. When illuminated by NIR light, both PTT from the NCs and chemotherapy from the CL were simultaneously triggered, resulting in killing macrophages with a synergistic effect. Moreover, chemo-photothermal therapy with CuCo2S4NCs/CL nanocomposites showed an effective therapeutic effect for arterial inflammation, in vivo. Our work demonstrated that chemo-photothermal therapy could be a promising strategy for the treatment of arterial inflammation against atherosclerosis.Keywords:self-assembled CuCo2S4nanocrystals;chloroquine;arterial inflammation;photothermal therapy;chemotherapy
研究领域:
纳米技术
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生物医学工程
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心血管疾病
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
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2022
·
IF 3.656
Li-hu Qian,Wei-wei Dong,Min-da Xu,Yan-Bo Cao,Xuan Wu,Xiao-jie Song,Yi Ding,Xi Wang
Developing hybrid metal sulfide electrocatalyst with excellent hydrogen evolution reaction (HER) catalytic performance and stability is vital to its commercial applications. Herein, hybrid CuCo 2 S 4 @ MoS 2 catalysts were designed with CuCo 2 S 4 synthesized by using ZIF-67 as a template and externally decorated with MoS 2 . The hybrid catalysts (denoted as C@M-0.5, C@M − 1, C@M − 2) show improved catalytic activity than those of MoS 2 and CuCo 2 S 4 due to large surface area and the interface between nanoflower-like MoS 2 and three-dimensional interconnected lamellar stacked CuCo 2 S 4 , which boost charge transport capability and improve the HER kinetic process. The influences of different ratio of CuCo 2 S 4 to MoS 2 on the electrocatalytic activity are investigated in detail. Specifically, C@M − 1 exhibit the best HER performance with an overpotential of 143 mV@ 10 mA/cm 2 , a Tafel slope of 45.2 mV/dec and satisfactory long-time stability. This work rationally designs hybrid CuCo 2 S 4 @MoS 2 catalyst to preserve the merits of using the ZIF-67 as a template and make use of the synergistic coupling effects between CuCo 2 S 4 and MoS 2 , which can be extended to synthesize other catalysts in different energy conversion fields.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Ze Yang,Yuanyu Chen,Qianghui Tian,Haixia Zhang,Ying Hou,Junjie Guo
The design and synthesis of hollow porous heterostructures from multiple components is expected to impart excellent properties to the electrochemically active materials owing to their high internal voids, high surface area, and high pore volume , which are beneficial for electrolyte infiltration. However, the development of optimized electrode materials for hollow porous heterostructure storage fell behind expectations. To address these challenges, we prepared a CuCo 2 S 4 @MnO 2 composite on a foam nickel substrate to create a hollow porous heterostructure. The optimized composite possesses high areal capacitance of 14.9 F cm −2 (or a specific capacitance of 1643 F g −1 ) at 3 mA cm −2 , and 83.4% capacitance retention after 30,000 cycles in a three-electrode configuration. The NF@CuCo 2 S 4 @MnO 2 //AC asymmetric supercapacitor can achieve high energy density (1.2 mWh cm −2 ) and power density (2.4 mW cm −2 ) due to the wide cell voltage in aqueous electrolyte and high particular capacitances from both CuCo 2 S 4 and MnO 2 improved by the hollow porous heterostructure. Furthermore, the NF@CuCo 2 S 4 @MnO 2 //AC ASC can light up an LED display screen. Overall, this work demonstrates the great potential and broad prospects for application in energy storage of hollow porous heterostructures.
研究领域:
材料科学
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电化学能源存储
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2018
·Vol. 29
·期 10
·8636-8648
·
IF 2.324
Yuan Xiaofang,Tang Bin,Sui Yanwei,Huang Saifang,Qi Jiqiu,Pu Yuguang,Wei Fuxiang,He Yezeng,Meng Qingkun,Cao Peng
In this study, CuCo 2 S 4 directly grown on carbon fiber papers (CFP) were prepared by a low-cost hydrothermal method. We also studied the influence of two different sulfur sources on the morphology and performance of CuCo 2 S 4 . Compared to TAA as sulfur source, the performance and morphology of CuCo 2 S 4 by Na 2 S·9H 2 O are better. The CuCo 2 S 4 –Na 2 S nanotubes possess irregular diameters from 100 to 200 nm. An electrode made of the synthesized CuCo 2 S 4 –Na 2 S nanotubes/CFP composite exhibits a maximum specific capacitance of 456 F g −1 at 1 A g −1 and 83% of capacitance retention after 5000 cycles at 5 A g −1 . The synthesized CuCo 2 S 4 –Na 2 S/CFP is used to construct an all-solid-state asymmetric supercapacitor (ASC) as the positive electrode, while and the negative electrode is made of a Fe 2 O 3 /reduced graphene oxide (rGO) composite on Ni foam. This asymmetric device has delivered an energy density of 50 W h kg −1 and a power density of 700 W kg −1 at an operating voltage of 1.5 V. It retains a long cycling life—78.2% capacity retention ratio after 5000 cycles. This work demonstrates the feasibility of the CuCo 2 S 4 –Na 2 S nanotubes in the applications of high-performance supercapacitors.
研究领域:
材料科学
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能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Zewei Hao,Pengkun Wei,Yang Yang,Jingyu Sun,Yunhua Song,Donggang Guo,Lu Liu
Eminent OER electrocatalysts occupies a vital position for hydrogen produced from water splitting. Up to now, sulfides with spinel structure have been considered as the most promising electrocatalysts to replace noble metal catalysts, but generally their catalytic activities are still unsatisfactory. Based on above situation, we used one-step solvothermal method to synthesis two CuCo 2 S 4 nanosheets by introducing two different surfactants. Two CuCo 2 S 4 nanosheets both show outstanding catalytic properties for OER. Specifically, CuCo 2 S 4 CNS exhibits the best OER performance with a low overpotential of 269 mV at a current density of 10 mA cm −2 and a small Tafel slope of about 41 mV dec −1 in 1.0 M KOH. The CV scanning and chronoamperometry tests also show its excellent stability. XPS analysis reveals the introduction of Cu ions into Co 3 S 4 lattice improve the relative concentration of Co 3+ on CuCo 2 S 4 nanosheets surface, which makes the catalytic performance get extensively improvement.
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
Nanoscale
·
2023
·Vol. 15
·期 39
·16199-16208
·
IF 6.7
Bianli Zhang,Xingyue Qian,Hui Xu,Lin Jiang,Jiawei Xia,Haiqun Chen,Guangyu He
The coordination of the electronic structure and charge transfer through heteroatomic doping and sulfur vacancies is one of the most vital strategies for enhancing the electrocatalytic performance of the oxygen and hydrogen evolution reactions (OER, HER) through water splitting. Se-doped CuCo2S4 nanosheets (CuCo2S3.68Se0.32) with abundant sulfur vacancies were synthesized via a simple hydrothermal method to achieve remarkably efficient electrocatalytic water splitting. Importantly, incorporating Se in three-dimensional nanosheet structures effectively fine-tunes the electronic structure, ensuring ample accessibility of active sites for swift charge carrier transfer and improved reaction kinetics. The optimized CuCo2S3.68Se0.32 offers substantially high electrocatalytic activity with overpotentials of 65 and 230 mV at the current density of 10 mA cm−2 for HER and OER, respectively, which is comparable to commercial catalysts. Combining Se-doping and rich sulfur vacancies facilitates fast charge transport, thus significantly boosting the electrocatalytic activity. Furthermore, utilizing CuCo2S3.68Se0.32 as both the cathode and anode, a two-electrode electrolyser exhibits remarkable performance. It achieves a low voltage of 1.52 V at 10 mA cm−2 and demonstrates exceptional durability over time. This study investigates the significance of doping and vacancies in enhancing electrocatalytic activity for water splitting.
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
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2020
·
IF 4.939
Hongwei Li,Ting-Ting Li,Jinjie Qian,Yan Mei,Yue-Qing Zheng
Ammonia synthesis based on electrocatalytic nitrogen reduction reaction (NRR) by using renewable sources of energy under ambient conditions has attracted wide research attentions. Herein, we report that the noble-metal-free CuCo 2 S 4 /multiwalled carbon nanotube nanocomposite , which is synthesized via a facile one-step hydrothermal and sulfuration approach, can work as the high active and durable catalyst for electrocatalytic NRR. This nanocomposite achieves a high NH 3 yield of 137.5 μg h −1 mg cat −1 and a high Faradaic efficiency of 8.7% at −0.5 V vs reversible hydrogen electrode (RHE) in 0.1 M Na 2 SO 4 solution, which outperforms CuCo 2 S 4 counterpart and most reported NRR catalysts. These results reveal that the MWCNT in nanocomposite not only suppresses the aggregation of CuCo 2 S 4 nanoparticles and maximizes the exposure of active sites, but also contributes to the synergistic effect between CuCo 2 S 4 nanoparticles and MWCNT, and facilitates the interfacial reaction kinetics.
研究领域:
材料科学
·
化学工程
·
环境科学
✓ 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）