CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Weisen Huang,Shiyuan Dang,Wenqian Qu,Ruofan Gu,Guangyan Tian
Transition metal silicates (TMSs) have demonstrated significant potential in the realm of electrochemical energy storage. Despite this promise, the practical utilization of TMSs has not met anticipated benchmarks. A viable approach to enhance the electrochemical performance of composite electrode materials is through the integration of diverse Faradic components. Herein, a coral-like cobalt–nickel sulfide/cobalt–nickel silicate composite (CHOAMCN-S) with core–shell structure was designed by in-situ cladding of cobalt nickel sulfide on the outside of the cobalt nickel silicate material. The synergistic interaction between these two components significantly enhanced the overall charge storage capacity of the CHOAMCN-S composite by facilitating efficient charge redistribution. As expected, CHOAMCN-S displayed considerable specific capacity of 2390 F·g −1 at 0.5 A·g −1 and excellent cycling stability of 93 % after 20,000 cycles at 20 A·g −1 . Further, the hybrid supercapacitor (HSC) assembled with CHOAMCN-S and activated carbon (AC) achieved 64.7 Wh·kg −1 at 403 W·kg −1 . Simultaneously, the hybrid supercapacitor (HSC) demonstrated remarkable performance metrics, as evidenced by its ability to effectively power light bulbs and diodes. This exceptional performance underscores the promising potential for achieving high energy density through the synergistic integration of diverse Faradic components.
研究领域:
材料科学
·
电化学能源存储
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2025
·
IF 5.4
Sohail Mumtaz,Muhammad Imran,Amir Muhammad Afzal
In this study, we develop photoresponsive heterogeneous Cobalt-nickel-based MOFs (CoNi-MOFs), cobalt dioxide (CoO 2 ), and tungsten diselenide (WSe 2 ) hybrid device to improve the performance of photo-assisted supercapacitors. We measure the electrochemical characteristics of photo-assisted hybrid electrodes under both dark and light conditions using cyclic voltammetry and galvanostatic charge–discharge. In dark, a high specific capacity (Qs) is estimated at 970 C/g, increased to 1230 C/g under the light in three-electrode assemblies. An FTO/CoNi-MOF@CoO 2 @WSe 2 /Electrolytes//PANI@AC/GS photo hybrid supercapacitors device is designed and measured in both conditions. The hybrid device showed Qs of 325 C/g in light conditions with energy and power densities of 72 Wh/kg and 827 W/kg, respectively. Even after undergoing 6000 cycles, it exhibited a capacity retention (CR) rate of 91 % and columbic efficiency of 93 %, indicating its exceptional durability as an energy storage device. Besides, the composite devices detect zearalenone in agricultural food samples. The optimal signal for Zearalenone in phosphate buffer solution was observed at pH 7.0, yielding the highest detected response. The sensor demonstrated a broad linear dynamic range of 1–300 μM and an impressively low detection limit of 0.5 nM for Zearalenone concentration. The CoNi-MOF@CoO 2 @WSe 2 nanocomposite has a remarkable sensitivity value of 110.72 mA/cm −2 /mM −1 and response against zearalenone in light. The findings also suggest that the capacitance of the CoNi-MOF@CoO 2 @WSe 2 electrode may increase at an optimal temperature. This likely occurs due to enhanced ion diffusion and charge transfer kinetics, which can improve the energy storage device’s efficiency and aid in identifying the cancerous part of the body.
研究领域:
材料科学
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分析化学
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能源存储
·
食品安全检测
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Jiaming Wang,Guilong Liu,Huixian Zhong,Pengfei Song,Kang An,Ziyang Zhang,Ang Cao,Yuan Liu
In this work, Co δ+ -Co 2 C decorated-Co-Ni alloy nanoparticles (NPs) loaded on Mg-Al-O complex oxides were fabricated via an in-situ reduction and topochemical carbonization strategy by using hydrotalcite as the precursor. The Co δ+ -Co 2 C decorated-Co-Ni alloys were obtained via the following process: (I) after reduction, Co-Ni alloy was obtained and Co could donate electrons to Ni in the Co-Ni alloy NPs; (II) in syngas atmosphere, some of cobalt atoms on the surface of Co-Ni NPs reacted with CO and were converted to Co 2 C. Resultantly, in the reaction process, Co-Ni alloy NPs were transformed into Ni-Co alloy@Co-Co 2 C, a core-shell structure with Ni-Co alloy core and Co-Co 2 C shell. When used as the catalysts for direct ethanol synthesis (DES) from syngas, the bimetallic Co-Ni alloy@Co-Co 2 C catalyst performed excellent selectivity to ethanol, owing to the regulation of dissociatively and associatively adsorbed CO by Co δ+ -Co 2 C active sites formed on the surface of Co-Ni alloy NPs. Moreover, the mutual dilution between Co and Ni in the Co-Ni alloy NPs inhibited the generation of heavy hydrocarbons, further improving the selectivity to alcohols. The total alcohol selectivity of 43.0% and ethanol occupied 45.2 wt% could be reached over the optimal catalyst.
研究领域:
材料科学
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催化化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2025
·
IF 4.1
Yu Fu,Lijie Qi,Wanli Kang,Saule B. Aidarova,Hongbin Yang,Shujun Liu
The construction of electrocatalytic cathodic nitrate reduction and anodic polyacrylamide (HPAM) oxidation reactions is a promising new electrocatalytic reaction system, which promises simultaneous ammonia synthesis and HPAM degradation. Here, we synthesised an N-doped C nanotube-encapsulated CoNi nano-alloy and used it for electrocatalytic NO 3 − reduction and HPAM oxidation reactions. Therein, CoNi-0.5 could achieve the maximum ammonia yield and Faraday efficiency of 5516.73 ± 66.07 μg h −1 mg cat −1 and 94.71 ± 1.21 %, respectively. Meanwhile, the maximum degradation rate of HPAM was 73.02 ± 1.16 % at 2 h. By In-situ ATR-SEIRAS, in-situ DEMS demonstrated that *NOH is an important reaction intermediate in the ammonia synthesis process, and the bimetallic CoNi alloy can effectively reduce the reaction energy barrier for NO 3 − reduction. This work presents a new strategy for constructing a coupled system for electrocatalytic NO 3 − reduction.
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
ACS Applied Nano Materials
·
2023
·
IF 5.9
Hongjing Wang,Beibei Wang,Hongjie Yu,Kai Deng,You Xu,Xiaonian Li,Ziqiang Wang,Liang Wang
Electrocatalytic water splitting is an important approach for sustainable and green production of hydrogen but is greatly hampered by the sluggish oxygen evolution reaction (OER). Therefore, developing a favorable alternative reaction to replace OER for both energy-efficient coproduction of hydrogen and value-added chemicals is highly desirable. Herein, a thermodynamically favorable sulfion oxidation reaction (SOR) electrocatalyzed by CoNi2S4 nanoflowers (CoNi2S4 NFs) is reported to couple with the hydrogen evolution reaction (HER) for energy-efficient hydrogen production and sulfur recovery. In this coupled system, only a low cell voltage of 0.3 V is required to produce hydrogen at 10 mA cm–2, much lower than that of water splitting (1.76 V). Meanwhile, S2– ions are selectively electrooxidized to sulfur with a high yield of 220.5 g h–1 m–2, realizing electrochemical upcycling of sulfur-containing pollutants. This strategy provides an attractive route for both energy-effective hydrogen generation and sulfur recycling.
研究领域:
能源化学
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环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2020
·
IF 6.215
Xiaoyan Wang,Ying Xie,Wei Zhou,Xiuwen Wang,Zhicheng Cai,Zipeng Xing,Mingxia Li,Kai Pan
The hierarchical electrocatalysts with the superaerophobic property are in favor of removal of gas bubbles and supply of numerous active sites to improve the electrochemical catalytic activity for water splitting. In this work, the self-supported Zn-doped CoNiP (Zn–CoNiP/NF) hierarchical structure that consisted of nanothorns and radial microspheres were prepared with via a facile precursor phosphorization method. Zn-doping could tailor the initial electronic state of CoNiP to improve the hydrogen or oxygen atom binding, which effectively promoted the catalytic kinetics of water splitting. The hierarchical structure not only offered more catalytic active sites for water splitting, but also facilitated gas releasing due to the superaerophobic interface. The hierarchical Zn–CoNiP structure showed a high hydrogen evolution reaction (HER) efficiency in electrolytes with pH 0–14, which yielded low overpotentials of 73 mV in acidic solution and 34 mV in alkaline media at current density of 10 mA cm −2 . Furthermore, it also had evidenced by an overpotential of 310 mV for oxygen evolution reaction (OER) at the current density of 50 mA cm −2 . Note that the required cell initial voltage was 1.51 V for overall water splitting. These results were comparable or even better than many non-noble catalysts.
研究领域:
材料科学
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电化学
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催化反应
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Jian Tang,Geng Gao,Jun Fang,Yusong Yang,Junxian Hu,Bin Yang,Yaochun Yao
Optimizing hydrogen adsorption and enhancing water absorption are essential for the design of effective hydrogen evolution reaction (HER) electrocatalysts. Herein, a well-defined core–shell-structured P-CoNiMoO@Co 2 P-Ni 2 P catalyst was synthesized on nickel foam via high-temperature phosphidation of heterostructured precursor CoMoO 4 ·xH 2 O/NiMoO 4 ·xH 2 O with hydrogen (H 2 ) assistance. This catalyst exhibits good HER performance, requiring only 24 mV of overpotential to achieve a current density of 10 mA cm −2 , and long-term stability, maintaining a current density of 100 mA cm −2 for over 100 h. Density functional theory calculations indicate that the molybdenum site is highly favorable for water adsorption in phosphorus-doped cobalt nickel molybdate (P-CoNiMoO), while the trigonal Ni 3 site is optimal for hydrogen adsorption. These findings indicate that the cooperative interactions and functional division between the core and shell substantially enhance HER performance. In addition, P-CoNiMoO@Co 2 P-Ni 2 P demonstrates high oxygen evolution reaction performance, achieving a current density of 10 mA cm −2 at an overpotential of 243 mV. When functioning as a bifunctional electrocatalyst, it requires only 1.49 V to drive overall water splitting at a current density of 10 mA cm −2 , with a durability of over 200 h at current densities of 100 and 300 mA cm −2 . This study provides significant insights into the development of HER catalysts with potential applications in other fields.
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
International Journal of Minerals Metallurgy and Materials
·
2025
·Vol. 32
·期 3
·668-677
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IF 7.2
Huo Yuying,Wang Zhengyan,Zhang Yanlan,Wang Yongzhen
High-entropy design is attracting growing interest as it offers unique structures and unprecedented application potential for materials. In this article, a novel high-entropy ferrite (CoNi) x /2 (CuZnAl) (1− x )/3 Fe 2 O 4 ( x = 0.25, 0.34, 0.40, 0.50) with a single spinel phase of space group \(Fd\bar{3}m\) was successfully developed by the solid-state reaction method. By tuning the Co–Ni content, the magnetic properties of the material, especially the coercivity, changed regularly, and the microwave absorption properties were improved. In particular, the effective absorption bandwidth of the material increased from 4.8 to 7.2 GHz, and the matched thickness decreased from 3.9 to 2.3 mm, while the minimum reflection loss remained below −20 dB. This study provides a practical method for modifying the properties of ferrites used to absorb electromagnetic waves.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Tingwei Liu,Congcong Xu,Yang Guo,Pei-Zhou Li,Shiling Yuan,Meng Lin
The electrolytic water of oxygen evolution reaction is a four-electron transport process, which results in a slow kinetic process coupled with a high oxygen evolution reaction application potential; therefore, the catalysts have become an urgent bottleneck in the research of hydrolysis reactions. Research on the oxygen evolution reaction is booming with various materials such as noble metals and transition metals. Because of their intrinsically excellent charge transport properties and cost-effective features, transition metal sulfides have attracted much investigation. Herein, we combined the synergistic catalysis of transition metals with the modification of trace noble metal atoms to design and synthesize gold-doped cobalt–nickel sulfide nanosheets (Au-CoNiSx NSs) for oxygen evolution reaction. The cobalt–nickel ratio of electrodeposition and the doping of Au on the millimolar scale were studied. The doping of Au atoms promoted the deposition of sulfur elements and led to the formation of more compact nanostructures, thereby improving the OER performance. The optimal electrochemical performance was obtained with Co/Ni = 3:1 and Au addition of 0.5 mmol/L, with an overpotential of 305.9 mV (vs RHE) at a current density of 10 mA/cm2 and a Tafel slope of 60.98 mV/dec. In the chronopotentiometry measurement, there was no significant difference in electrochemical performance within 12 h, indicating that the nanomaterial has good catalytic stability.
研究领域:
材料科学
·
电化学
·
催化
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Riguang Cheng,Zhaoyu Liu,Pantrangi Manasa,Zhongxian Zhao,Hongge Pan,Fen Xu,Lixian Sun,Federico Rosei
The inherent thermodynamic stability and slow kinetics of LiAlH₄ pose significant challenges for its practical application in hydrogen storage. This study addresses these limitations by introducing nanoflower-structured layered double oxides (Co₃O₄@CoNi-LDO) as a performance-enhancing catalyst. The Co₃O₄@CoNi-LDO was synthesized through a hydrothermal process followed by calcination and subsequently incorporated into LiAlH₄ via mechanical ball milling. Experimental results demonstrate that the addition of 7 wt% Co₃O₄@CoNi-LDO substantially improves the hydrogen desorption properties of LiAlH₄. The hydrogen release temperatures for the two-step desorption process are reduced to 85.1 °C and 177.0 °C, respectively, with a total hydrogen release of approximately 6.87 wt% below 300 °C. Moreover, the activation energy of the two desorption steps is lowered by 20.0% and 46.3% compared to pristine LiAlH₄. The modified material also exhibits superior rehydrogenation performance, absorbing approximately 0.64 wt% hydrogen within 5 h-markedly better than pristine LiAlH₄. Mechanistic studies reveal that the in-situ formation of catalytically active species, such as Al₁₃Co₄ and Al₀.₉Ni₄.₂₂, anchored on the LiAlH₄ matrix, plays a pivotal role in facilitating hydrogen transfer. These catalytic sites effectively reduce the energy barriers for hydrogen desorption, enhancing the kinetics of the process. This work highlights the potential of Co₃O₄@CoNi-LDO nanoflowers as a highly effective catalyst for improving the hydrogen storage capabilities of LiAlH₄, paving the way for its application in advanced energy storage systems.
研究领域:
材料科学
·
能源存储
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Lei Yuan,Na Xin,Yu Liu,Weidong Shi
Research on environmentally friendly energy storage devices is an important strategy to solve the energy crisis and environmental pollution. Herein, a novel self-supporting electrode based on multi-dimensional Co 3 O 4 /NiCo 2 O 4 hierarchical flakes coating on graphene/carbon sphere (rGO/CS) conductive substrate is reasonably designed. Firstly, a simple hydrothermal method is used to synthesize NiCo 2 O 4 with both flake and nanoneedle morphology on the rGO/CS substrate. Subsequently, Co 3 O 4 /NiCo 2 O 4 @rGO/CS is obtained by in-situ growth of metal organic frameworks polyhedrons on the surface of NiCo 2 O 4 flakes followed by calcination. In the unique structure, benefitting from the synergy between the substrate and multi-element transition metal oxides, the integrated film shows good conductivity, high specific surface area and abundant active sites. Thus, the binder-free electrode exhibits an ultra-high specific capacitance of 3876.6 F g −1 (538.4 mA h g −1 ) at 1 A g −1 . A hybrid supercapacitor is assembled with activated carbon as the negative electrode and Co 3 O 4 /NiCo 2 O 4 @rGO/CS as the positive electrode, the device shows a highest energy density of 56.5 Wh kg −1 at a power density of 800 W kg −1 . After 6000 charge–discharge cycles, 92.5% of the initial capacitance can be still maintained, indicating its good application prospects in energy storage materials.
研究领域:
材料科学
·
能源存储
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2019
·
IF 4.084
Qing Li,Wenjun Yan,Ye Liu,Haiyan Du,Zhongde Wang,Xiaogang Hao,Guoqing Guan
Transition-metal chalcogenides as the promising alternatives to noble-metal-based electrocatalysts for hydrogen evolution reaction (HER) with high activity and durability in water splitting have attracted extensive attention in recent years. Herein, Co z Ni y S x @PPy composites with three-dimensional (3D) cauliflower-like were firstly prepared on carbon fiber paper (CFP) via a simple and efficient electrochemical reduction of elemental sulfur in the precursor of S@PPy composite coated on CFP to react with Co and Ni ions in the electrolyte. The optimum electrode, i.e., Co z Ni y S x @PPy/CFP-6 (A-6) prepared by using an electrolyte with a Co/Ni molar ratio of 0/6, showed excellent catalytic activity (with an overpotential of 185 mV@10 mA cm −2 and a small Tafel slope of 78.13 mV dec −1 ) as well as long-term stability (at least 100 h) in 1 M KOH solutions. This work provides a novel way to fabricate effective and non-noble-metal electrodes for HER in water splitting.
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）