FUEL
·
2024
·
IF 6.7
Zhongxian Li,Xingzhao Wang,Yuewen Xu,Xiaoran Li,Jianchao Zhang,Yang Liu,Jiabing Luo,Yan Zhou
Slow mass transport and charge transfer restrict the electrocatalytic oxygen evolution reaction (OER) activity of FeP. Herein, we synthesized Fe-based bimetallic Prussian blue analogues (CoFe, NiFe, and CuFe-PBAs), and further prepared nitrogen-doped carbon anchored FeP-based heterostructures namely CoP-FeP/NC, Ni 2 P-FeP/NC, and Cu 3 P-FeP/NC using template-assisted and phosphating annealing strategies. It is worth noting that CoP-FeP/NC shows a hollow nanocubic structure, shortening the ion transport pathway and facilitating surface atom exposure, thus improving reaction kinetics. Meanwhile, the similar atomic radius of Co and Fe promotes the formation of stable CoP-FeP heterointerfaces with the same crystal system components and low lattice mismatch, inducing the electron transfer from Co to Fe and generating more low-valent Fe cations, thereby enhancing activity. Besides, Co and Fe sites underwent surface reconstruction into CoOOH and FeOOH active species, therefore achieving efficient synergistic electrocatalytic OER. As a result, CoP-FeP/NC exhibits superior OER activity (254 mV@10 mA cm −2 ) than Ni 2 P-FeP/NC and Cu 3 P-FeP/NC in 1.0 M KOH solution, even exceeds commercial RuO 2 (266 mV@10 mA cm −2 ), and presents no obvious performance decay (11.26 %) after continuous electrolysis at 100 mA cm −2 for 100 h, showing practical application prospects. Our work provides a general approach for preparing efficient and stable FeP-based heterostructures as OER electrocatalysts.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Nano
·
2024
·
IF 15.8
Minglei Lu,Zhuoyu Zheng,Weiwei Lu,Haiping Zhu,Junwei Liao,Yuxin Ge,Xueer Huang,Qian Zhang,Jiajin Li,Yiyuan Zhou,Xiaoping Wu,Baozhu Chen,Chunxiao Yang,Xitang Qian,Minhua Shao,Tiejun Wang
Aqueous-phase reforming of methanol represents a promising avenue for hydrogen (H2) production. However, developing highly efficient and low-cost nonprecious catalysts remains challenging. Here, we report the synthesis of Cu-based catalysts with Cu, Cu2O, and CuN3 nanoparticles anchored on the nitrogen-doped carbon, forming Cu0/Cu+/Cu-N3 active sites. This catalyst achieves a H2 production rate of 140.1 μmol/gcat/s at 210 °C, which is several times to 2 orders of magnitude higher than that of Cu-, Ni-, even Pt-based catalysts, demonstrating excellent long-term stability over 350 h at 210 °C. A mechanism investigation reveals that the Cu-N3 site facilitates water dissociation into *OH and improves *CO and *OH conversion, leading to enhanced CO conversion and H2 production kinetics.
研究领域:
催化化学
·
能源材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2026
·
IF 5.1
Xin Zhang,Zhi-Rong Fu,Jing-Yuan Hao,Yu Han,Hai-Long Liao,Bao-Ju Wang,Yong Luo
The catalytic hydrogenation of nitroaromatic sulfonic acids (NSAs) to synthesize aminoaromatic sulfonic acids (ASAs) is an environmentally promising alternative. However, the deactivation of current catalysts hinders its practical application. In this work, we proposed a strategy of trace sulfur modification to enhance the sulfur-tolerance of the Co@NC catalyst. Characterization revealed that Co@NC-S synthesized with cobalt sulfate has the largest particle size and specific surface area. Using sodium m -nitrobenzenesulfonate (SNS) hydrogenation as a probe reaction, the Co@NC-S catalyst demonstrated superior performance, achieving 99.52% conversion and 98.02% selectivity (100 °C, 3 MPa). Density functional theory (DFT) calculations elucidated that the remarkable sulfur-tolerance of the Co@NC-S catalyst originated from the interaction between the trace sulfur species and the cobalt nanoparticles, thereby weakening the bonding strength of Co with various sulfur-containing compounds. The Co@NC-S catalyst also exhibited excellent stability, magnetic recyclability, and versatility in hydrogenating diverse NSAs, underscoring its significant industrial potential.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Yiqing Lu,Chunhai Jiang,Yu Bai,Junwei Wan,Yutao Xing,Zhimin Zou
The scalable application of SiO anode in lithium ion batteries is still limited by its low initial Coulombic efficiency and inferior cycle stability. Compositing SiO with other substances that own high structural stability , fast Li ion diffusion rate and good Li ion storage capacity has been proven of effectiveness to tackle the aforementioned problems. Herein, manganese niobate (MnNb 2 O 6 ) that possesses 3-dimensional Li ion diffusion channels is used to modify SiO anode in conjunction with N-doped carbon coating to improve the Li-ion storage performance. Ex situ XRD measurements reveal that the orthorhombic MnNb 2 O 6 is converted to amorphous Li x MnNb 2 O 6 during lithiation and reversed back to MnNb 2 O 6 in the following delithiation process. The crystal structure of MnNb 2 O 6 is well preserved after a long-term cycle test, suggesting its high structural stability. With such stable structure and ultrafast Li ion diffusion kinetics , the optimized SiO@MnNb 2 O 6 @NC composite anode exhibits obviously improved rate performance and cycle stability as compared to SiO@NC. A reversible capacity of 835 mAh g −1 is maintained at a relatively high current density of 3.0 A g −1 , and a discharge capacity of 799 mAh g −1 is preserved after 200 cycles at 1.0 A g −1 . This work provides a facile and promising strategy to modify SiO-based anode with Columbite-type Nb-based metal oxides towards better Li-ion storage properties.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2025
·
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
·
电化学
·
能量存储
·
电池技术
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Liling Wang,Yanbin Wang
Hg 2+ ions, as one of the prevalent toxic heavy metals, are ubiquitously distributed in food and environmental systems. Consequently, there is an urgent demand to develop a convenient and reliable detection platform. In this study, heteroatom-doped PdCo@NC nanozymes were synthesized by pyrolyzing bimetallic metal-organic frameworks (MOFs) in argon, combining MOF-derived porous carbon with C/N co-doping. The resultant PdCo@NC-500 material exhibits a flower-like morphology with defects and uniform elemental distribution, demonstrating unique intrinsic peroxidase-like activity. This enables the oxidation of TMB in the absence of H₂O₂, with catalytic performance surpassing that of single-metal systems. Key reaction intermediates (•OH, 1 O₂) were verified through quenching experiments. Kinetic analysis revealed that this material possesses high catalytic efficiency ( K m = 0.101 mM, V max = 238.9 × 10 −3 M/s). Notably, following the distinctive REDOX reaction between H₂O₂ and Hg 2+ , the peroxidase-like activity of PdCo@NC-500 is significantly inhibited, enabling selective alteration of the reaction pathway and changing the product color from blue to yellow. This unique response characteristic provides a foundation for designing colorimetric sensors, achieving dual-wavelength colorimetric detection of Hg 2+ . Experimental results indicate that the linear range of this method is 50–1000 μM (λ = 450 nm) and 0.5–100 μM (λ = 652 nm), with a detection limit of 0.02 μM. This method has been successfully applied to highly sensitive detection of Hg 2+ in real water samples and rice, with recovery rates ranging from 94.87 % to 109.1 %.
✓ 已验证
产品关联
DOI
高影响因子
ChemistrySelect
·
2025
·Vol. 10
·期 34
·e01982
·
IF 2
Ying Wu,Xiaolan Song,Jun Zhang,Yi Wang,Chongwei An
To prepare silica-based composite energetic materials with regular shape, good dispersion, and uniform particle size and thus improve their combustion performance and safety and better apply them in solid propellants, in this study, nSi (nanosilica powder)/NC/CL-20 composite microspheres were prepared by fluid-focused microchanneling with nitrocellulose (NC) as a binder and nSi nanopowder and CL-20 as raw materials via droplet microfluidics. Orthogonal experiments were conducted to determine the optimal process parameters for preparation, ultimately resulting in the successful synthesis of composite microspheres with uniform particle size and good sphericity. Additionally, this study characterized the thermal decomposition properties and combustion performance of three types of composite microspheres (nSi/NC/CL-20, µSi (micron-sized silicon powder)/NC/CL-20, and NC/CL-20). The results showed that the activation energy of nSi/NC/CL-20 reached 530.95 kJ/mol, higher than that of µSi/CL-20/NC (211.19 kJ/mol) and CL-20/NC (210.50 kJ/mol); its 5-second burst point temperature was the highest, reaching 590.33 °C. In terms of combustion performance, nSi/NC/CL-20 exhibited significantly superior maximum pressure (1.22 MPa) and pressure rise rate (1.6 MPa/s) compared to the other two samples. These results clearly demonstrate that the addition of nanosilica powder can effectively improve the thermal stability and combustion performance of composite microspheres. Graphical In this study, droplet microfluidic technology is used to prepare nSi/NC/CL-20 composite microspheres with regular shape, good dispersibility and uniform particle size. Studies show that the addition of nano-silicon powder (nSi) can significantly improve the thermal stability and combustion performance of these composite microspheres, enabling them to be more effectively applied in the field of solid propellants.
研究领域:
材料科学
·
推进剂化学
·
微纳加工
·
燃烧学
·
热分析
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
·
2019
·Vol. 137
·期 5
·1615-1620
·
IF 2.471
Yang Hongtao,Liu Yunfei,Huang Haitao,Zhao Yu,Song Kuanguang,Wang Haiyang,Xie Wuxi,Cheng Yi,Fan Xuezhong
In this study, an advanced electrospray process was successfully used to fabricate aluminum nanopowders (Al)/iron oxide nanopowders (Fe 2 O 3 )/hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX)/nitrocellulose (NC) composite materials containing different RDX contents. Differential scanning calorimetric analysis indicates that the decomposition temperature of the RDX in the composition prepared by electrospray has a decrease of about 20 °C compared with the raw RDX. Combustion performances in air show that the RDX decreases combustion performance of nanothermites, and the combustion intensity decreases as the RDX content increases. Furthermore, the combustion cell test indicates that the maximum pressure peak has been greatly improved for the Al/Fe 2 O 3 /RDX/NC composites. The amount of released gas can be adjusted by the RDX content in Al/Fe 2 O 3 /RDX/NC composite.
研究领域:
材料科学
·
燃烧与爆炸
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Jianhui Feng,Hu Zhou,Danyang Chen,Ting Bian,Aihua Yuan
The electrocatalysts with high activity and low cost are essential for hydrogen evolution reaction (HER). Herein, we report an approach to prepare hierarchical core-shell structures Zn x Co 1-x /NC@MoS 2 . The Zn/Co ratio affects the particle sizes of Zn x Co 1-x /NC polyhedra and the distribution of Co nanoparticles , resulting in the change of the amount of exposed active sites and further afforded tunable HER activities. Notably, the hybrids exhibit significantly superior catalytic activities to pristine MoS 2 . The optimal catalyst displays an extraordinary HER performance in acid media with a low overpotential of 130 mV at 10 mA cm −2 and high durability. The remarkable HER properties mainly originate from the fantastic structural characteristics such as abundant exposure of MoS 2 edge-sites, uniform distribution of Co-N x species, as well as the porousness and high conductivity of supports. This research provides a promising strategy to develop inexpensive and highly-efficient HER electrocatalysts derived from metal-organic frameworks and MoS 2 .
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 Central South University
·
2021
·Vol. 28
·期 5
·1279-1290
·
IF 1.716
Zhang Guang-ji,Tang Fei-ying,Wang Li-qiang,Yang Wen-jie,Liu You-nian
Transition metal sulfides (TMSs)-based materials have been extensively investigated as effective non-noble catalysts for various applications. However, the exploration of TMSs-based catalysts for hydrogenation of nitro compounds is limited. Herein, CoS x /NC catalysts were prepared by solvothermal sulfurization of ZIF-67, followed by high-temperature annealing (300–600 °C) under NH 3 atmosphere. It was found that the structures and compositions of the as-prepared CoS x /NC can be readily tuned by varying the annealing temperature. Particularly, CoS x /NC-500, which possesses higher degree of S defects and larger specific surface areas, can achieve high conversion, selectivity and stability for catalytic reduction of nitro compounds into amines under mild reaction conditions.
研究领域:
化学工程
·
催化材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2023
·
IF 4.5
Guiling Ren,Jindou Hu,Kun Wang,Anjie Liu,Zhenjiang Lu,Jing Xie,Aize Hao,Yali Cao
WC-based materials are considered as a promising alternative electrocatalyst to Pt because of its similar electronic structure to Pt at Fermi level, low cost and good corrosion resistance. However, the shortcomings of easy agglomeration of WC at high temperature and its own strong W H bond leaded to its low catalytic performance. Herein, the hybrid catalyst of WC-WP/NC was prepared by a simple melting salt-assisted simultaneous phosphorylation and carbonization strategy. Excitingly, the hydrogen evolution overpotential of WC-WP/NC is much lower than that of WC/NC and WP/NC in acidic and alkaline conditions, and the stability of WC-WP/NC is significantly better than 20% Pt/C. The excellent performance is mainly attributed to the synergistically coupling of WC and WP hybrids, the rapid transfer of interface charges has changed the electronic structure of the catalyst. Furthermore, the nitrogen doped two-dimensional porous carbon nano sheets can not only increase the conductivity of the catalyst and prevent the agglomeration of nano particles, but also effectively promote the contact between electrolyte and catalyst, accelerating the HER (Hydrogen Evolution Reaction) kinetic reaction. This work provides an effective strategy for constructing a good dispersive multi-interface hybrid catalyst.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
RARE METALS
·
2023
·
IF 8.8
Zhang Chen-Chen,Wei Sheng,Sun Li-Xian,Ouyang Yi-Fang,Xu Fen,Chu Hai-Liang,Pan Hong-Ge,Chen Li-Xin,Xiao Xue-Zhang
Electrocatalytic water splitting coupled with sustainable energies is identified as an environmentally friendly and renewable strategy to generate high-quality hydrogen for the fuel cells. However, the main challenge is to develop high performance, low cost and chemically stable electrocatalysts to decline the energy barriers and enhance the sluggish kinetics of hydrogen evolution reaction (HER). Herein, a three-dimensional hierarchically ordered macroporous Ru-CoP@NC electrocatalyst (3DOM Ru-CoP@NC) derived from ordered macro-microporous metal–organic frameworks has been prepared using the precursor@template and double-solvent methods. The prepared 3DOM Ru-CoP@NC catalyst exhibits an overpotential of 15 mV ( j = 10 mA·cm −2 ) and a reaction Tafel slope of 38 mV·dec −1 in alkaline electrolyte, which are superior to commercial Pt@C catalyst. Additionally, the overpotential and reaction Tafel slope of this catalyst in acidic media are 45 mV and 50 mV·dec −1 , respectively. The outstanding HER activities of 3DOM Ru-CoP@NC catalysts are ascribed to the 3D highly interconnected-reticular nanospaces that can increase effective reaction active sites. The N doped carbon framework improves the electronic properties and conductivity. Moreover, the strong interaction of Ru and CoP nanoparticles also boosts the HER process. These results indicate that 3DOM Ru-CoP@NC catalysts with high catalytic activities have a broad application prospect in the future. Graphic abstract
✓ 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）