DALTON TRANSACTIONS
·
2024
·Vol. 53
·期 6
·2526-2533
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IF 3.5
Jia-Min Lyu,Shen Yu,Zhan Liu,He-You Du,Ming-Hui Sun,Chun-Mu Guo,Yi-Long Wang,Yu Li,Li-Hua Chen,Bao-Lian Su
Excessive emission of CO2 into the atmosphere has severely impacted the global ecological environment. Converting CO2 into valuable chemicals and fuels is of great significance for sustainable development. However, low activity and undesirable selectivity often result from the inherent inertness of CO2. Herein, K- or/and Zn-modified Fe-based catalysts were prepared by an incipient-wetness impregnation method for CO2 hydrogenation via a cascade reaction. The results indicate that K species exist as K2O while Zn species exist as ZnFe2O4. In the CO2 hydrogenation pathway, K2O facilitates the adsorption of CO2 and restrains the adsorption of H2, accelerating the transformation of CO2 into C2–C4 olefins rather than paraffins while Zn species promote the dispersion of Fe species, leading to improved activity. Synergistically, a K- and Zn-modified Fe-based catalyst (2Zn–10K–Fe/Al) shows excellent catalytic CO2 hydrogenation activity, achieving a CO2 conversion of 77% which is 1.8 times that (42%) of the unmodified Fe-based catalyst (Fe/Al). Our catalyst also shows a significantly promoted selectivity to C2–C4 olefins of 17% in comparison with the Fe/Al catalyst (0%). It is envisioned that such a binary effect of elements might contribute to the low-cost and industrial production of Fe-based catalysts for selective CO2 conversion.
研究领域:
催化化学
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环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Shiying Wei,Jianfeng Huang,Yiting Wang,Qingqing Huang,Shuzhuo Bai,Koji Kajiyoshi,Yijun Liu,Zhenjiang Li,Liyun Cao,Jiayin Li
Tin sulfide (SnS) exhibits the potential to be used as a superior-performance electrode material for potassium ion batteries. However, serious volume expansion and poor ion transport capacity hinder the applications of SnS. In order to solve the above problems, this work designed a structure that parallel WS 2 sheets were embedded in SnS sheets (SnS/WS 2 @C). SnS/WS 2 @C displayed excellent kinetic properties and stability when applied to anode materials for potassium ion batteries, as well as a high reversible capacity. SnS/WS 2 @C maintains a superior specific capacity of 619 mAh g −1 after 100 cycles at 0.2 A g −1 and 210 mAh g −1 at 10 A g −1 . Such excellent performance is attributed to the fact that parallelly oriented WS 2 sheets provide fast channels for the transportation of potassium ions, which significantly improves the kinetic performance of the electrode, and can play an anchoring role for products in the process of charging and discharging by virtue of its excellent stability to effectively prevent structural fragmentation. This work provides new ideas for improving ion diffusion and enhancing the structural stability of transition metal layered compounds while maintaining the capacity advantage.
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 CHEMICAL AND ENGINEERING DATA
·
2019
·
IF 2.298
Yong-Sheng Xu,Xin Liu,Kang-Kang Pei,Rui-Xiong Zhao,Guo-Liang Zhang,Qing Xia,Feng-Bao Zhang
The solubilities of naphthalene in decalin, octane, dodecane, dichloromethane, trichloromethane, carbon tetrachloride, 1,2-dichloroethane, o-dichlorobenzene, 1-octanol, 2-octanone, 4-methyl-2-pentanone, and benzene were measured by a dynamic method over the temperature range of 279 to 330 K at atmospheric pressure. By comparison, the experimental results indicated that the molality solubility in dichloromethane reached maximum at certain temperature. Then, the Apelblat equation, the λh equation, the Wilson equation, and the nonrandom two liquid (NRTL) equation were used to correlate the experimental data. The NRTL equation was regarded as the effective model for all the solvents. Finally, the mixing properties were also calculated based on the NRTL equation. All these data were particularly instructive for the process of recycling naphthalene.
研究领域:
物理化学
·
化工过程
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2024
·Vol. 12
·期 32
·21085-21094
·
IF 10.7
Yafei Liu,Hao Sun,Ruifeng Wu,Aimin Chang,Bo Zhang
High ceiling temperature and the corresponding thermal stability are crucial to thermo-sensitive materials under extreme conditions. However, these features are often difficult to achieve simultaneously in conventional thermo-sensitive ceramics, thus becoming a key bottleneck restricting the development of thermo-sensitive ceramics in next-generation advanced high-temperature sensors. Here, for the first time, a (Ho0.2Er0.2Tm0.2Yb0.2Lu0.2)3NbO7 high-entropy ceramic is reported which possesses exceptional thermosensitive capability and high thermal stability. With the structure construction involving constraining a NbO6 octahedron by tailoring the lattice distortion and solving the stability degeneration caused by the tilt of the NbO6 octahedron and dipolar interactions of the off-centered Nb cations, the materials with highly dense lattice distortion dominated by symmetric tensile–compressive strains exhibit thermo-sensitive characteristics from 623 K to 1873 K. More importantly, the materials demonstrate exceptional thermal stability, with an aging coefficient of less than 1% after aging at 1873 K for 400 h. They also show an ultrahigh measurement accuracy (R2 as high as 999.92‰ and RSS as low as 0.071) maintaining excellent sensitivity at temperatures up to 1873 K. This work provides an effective way to design high-temperature thermosensitive ceramics with high ceiling temperature and high thermal stability to meet the demanding requirements of advanced high-temperature measurement applications.
研究领域:
材料科学
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传感器技术
✓ 已验证
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2020
·Vol. 7
·期 5
·1182-1189
·
IF 5.958
Xianglong Huang,Jianhua Deng,Yuruo Qi,Dingyu Liu,Yuanke Wu,Wei Gao,Wei Zhong,Fang Zhang,Shujuan Bao,Maowen Xu
A rechargeable K–Se battery is emerging as an energy storage system because of its much higher specific capacity than that of the traditional alkali metal-ion batteries, but is facing some critical issues and challenges. Exploiting stable and efficient Se-based cathode materials is one of the key points for addressing the intrinsic drawbacks of this new system. Herein, we developed an effective electrode (nitrogen-doped porous carbon sponge) to serve as an advanced electrode for K–Se batteries. The novel electrode presents good multifunctional characteristics, such as efficient confinement of selenium, valid accommodation of volumetric change, stable conductive framework and promotion of fast electron/ion transportation. Accordingly, desirable electrochemical performances are achieved when the as-obtained Se/carbon composite is used as the cathode of K–Se batteries. This work, via smart and efficient electrode design, unfolds a new idea to accelerate the development of advanced K–Se batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yu Duan,Jia-xuan He,Zi-han Ma,Shu-wen Chen,Ying-ying Huang,Shuo Bao,Jin-lin Lu
Sodium-ion batteries (SIBs) are gaining traction for large-scale energy storage due to sodium's abundance and cost efficiency, yet the structural instability and slow ion transport of P2-type cathodes remain critical challenges. This study employs a high-temperature solid-state approach to develop K/Cu co-doped cathodes, demonstrating that co-doping preserves the P2 phase while optimizing lattice parameters to expand interlayer spacing. The reduction in Mn 3+ content suppresses the Jahn-Teller effect and mitigates P2-O2 phase transitions, enhancing structural reversibility. The optimal K 0.05 Na 0.7 Ni 0.23 Mn 0.67 Cu 0.1 O 2 exhibits a high initial discharge capacity of 123.8 mAh·g −1 at 20 mA·g −1 and maintains 96.80 % capacity after 200 cycles at 200 mA·g −1 , outperforming single K-doped samples (89.83 % retention). Kinetic analyses reveal a sodium-ion diffusion coefficient of 1.06 × 10 −10 cm 2 ·s −1 , attributed to enlarged interlayers and reduced charge transfer resistance. In-situ XRD confirms minimal (002) peak shift (0.42°) during cycling, validating structural stability from K + -pinned interlayers. DFT calculations indicate that Cu doping induces spin-polarized half-metallic behavior, enhancing electron conductivity by increasing density of states near the Fermi level. This work presents a “dual-functional co-doping” strategy in which K + stabilizes interlayers and Cu 2+ optimizes the electronic structure, thereby simultaneously suppressing phase transitions and enhancing ion/electron transport. The proposed approach provides a scalable route for developing high-performance SIBs cathodes, which is crucial for advancing affordable and durable energy storage solutions.
研究领域:
材料科学
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电化学
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能源存储
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固态化学
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计算材料学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL THERMODYNAMICS
·
2015
·
IF 2.679
Hui-Hui Zhang,Na Kong,Jie Wang,Zhi-Hong Liu
Two pure microporous copper borates (NaCuB 7 O 12 · H 2 O and KCuB 7 O 12 · H 2 O) have been synthesised and characterized by XRD, FT-IR, TG techniques and chemical analysis. The molar enthalpies of solution of NaCuB 7 O 12 · H 2 O (s) and KCuB 7 O 12 · H 2 O (s) in 1 mol · dm −3 HCl (aq) were determined to be – (24.12 ± 0.12) kJ · mol −1 and – (35.07 ± 0.08) kJ · mol −1 , respectively. The molar enthalpies of solution of 0.72 mg of NaCl (s) and 0.91 mg of KCl in the mixture solvent of 2.00 cm 3 of 1 mol · dm −3 HCl (aq) which contains 5.3 mg of H 3 BO 3 were measured, respectively. The molar enthalpies of solution of 2.09 mg of CuCl 2 · 2H 2 O (s) in the mixture solvent of 2.00 cm 3 of 1 mol · dm −3 HCl (aq) which contains 5.3 mg of H 3 BO 3 and 0.72 mg of NaCl/0.91 mg of KCl were also measured, respectively. With the incorporation of the previously determined enthalpy of solution of H 3 BO 3 (s) in 1 mol · dm −3 HCl (aq), together with the standard molar enthalpies of formation for CuCl 2 · 2H 2 O (s), NaCl (s)/KCl (s), H 3 BO 3 (s), HCl (aq) and H 2 O (l), the standard molar enthalpies of formation of – (5373.3 ± 5.6) kJ · mol −1 for NaCuB 7 O 12 · H 2 O (s) and – (5375.0 ± 5.6) kJ · mol −1 for KCuB 7 O 12 · H 2 O (s) at T = 298.15 K were obtained on the basis of the appropriate thermochemical cycles. It is obvious that KCuB 7 O 12 · H 2 O (s) is more thermal stable than that of NaCuB 7 O 12 · H 2 O (s).
研究领域:
化学热力学
·
材料科学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2020
·
IF 5.162
Xiaoxiao Sun,Chuqiao Pan,Zhuoyang Ying,Dongyan Yu,Xitai Duan,Fangfang Huang,Junhong Ling,Xiao-kun Ouyang
We aimed to develop a stable nanosystem with k -carrageenan (Kc), an anionic polysaccharide , combined with tween 80 to stabilize zein nanoparticles. The experimental results showed that the particle size, zeta-potential, and stability of the system depend on the Kc amount when the zein amount was unchanged. We found that the nanosystem with 5.0 and 10.0 mg Kc had a smaller particle size (250.1 ± 0.9 and 287.6 ± 1.4 nm, respectively), low polydispersity index (PDI, ≤ 0.20), and high stability when the external conditions changed. No obvious flocculation or deposition was observed at pH of 3–9, salt ion concentrations of 0–500 mmol/L, temperature of 30 °C and 50 °C–90 °C, and storage at 4 °C for 30 days. When the Kc-ZNP system was loaded with curcumin (Cur), there was a good encapsulation effect (5.0 mg Kc with 1.00 mg Cur (EE (%) = 34.69% ± 2.02%, size = 380.23 ± 5.80 nm, PDI = 0.252 ± 0.018) and 10.0 mg Kc with 2.00 mg Cur (EE (%) = 20.13% ± 1.05%, size = 431.27 ± 0.78 nm, PDI = 0.269 ± 0.020), ensuring that the particle size was not too large. Therefore, Kc–ZNPs could be a potential delivery system for fat-soluble drugs.
研究领域:
食品科学
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药物递送系统
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生物材料
✓ 已验证
DOI
高影响因子
Nature Communications
·
2021
·Vol. 12
·期 1
·1-9
·
IF 14.919
Gao Xiaoyi,Cheng Zhenxiang,Chen Zibin,Liu Yao,Meng Xiangyu,Zhang Xu,Wang Jianli,Guo Qinghu,Li Bei,Sun Huajun,Gu Qinfen,Hao Hua,Shen Qiang,Wu Jinsong,Liao Xiaozhou,Ringer Simon P.,Liu Hanxing,Zhang Lianmeng,Chen Wen,Li Fei,Zhang Shujun
(K,Na)NbO 3 based ceramics are considered to be one of the most promising lead-free ferroelectrics replacing Pb(Zr,Ti)O 3 . Despite extensive studies over the last two decades, the mechanism for the enhanced piezoelectricity in multi-elements doped (K,Na)NbO 3 ceramics has not been fully understood. Here, we combine temperature-dependent synchrotron x-ray diffraction and property measurements, atomic-scale scanning transmission electron microscopy, and first-principle and phase-field calculations to establish the dopant–structure–property relationship for multi-elements doped (K,Na)NbO 3 ceramics. Our results indicate that the dopants induced tetragonal phase and the accompanying high-density nanoscale heterostructures with low-angle polar vectors are responsible for the high dielectric and piezoelectric properties. This work explains the mechanism of the high piezoelectricity recently achieved in (K,Na)NbO 3 ceramics and provides guidance for the design of high-performance ferroelectric ceramics, which is expected to benefit numerous functional materials.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Haiping Wang,Xingyu Wang,Xinmiao Liu,Shuwei Zhang,Shutong Meng,Wenjie Yan,Xin Zhang,Zhansheng Lu,Zenghui Qiu,Haijun Xu,Jiaqi He
Aqueous zinc-ion hybrid supercapacitors (ZHSCs) exhibit great potential for energy storage and conversion devices, owing to their inherent safety and cost-effectiveness. Nevertheless, the structure of traditional porous carbon cathodes hinders the zinc-ion diffusion kinetics, rendering the energy densities of conventional ZHSCs uncompetitive and severely impeding their practical applications. 2D transition metal carbides/nitrides, known as MXenes, exhibit excellent conductivity and abundant surface functional groups, qualifying them as ideal candidates for constructing high-capacity cathodes in high-performance ZHSCs. This study presents the fabrication of a ZHSC utilizing 3D porous K + -intercalated Ti 3 C 2 T X -reduced graphene oxide (K + -Ti 3 C 2 T X -RGO) hydrogel as cathode, paired with a zinc foil as anode. Upon treatment with KOH solution, Ti 3 C 2 T X undergoes K + ion intercalation into its nanosheets, resulting in partial elimination of terminal -F groups and expansion of the MXene interlayer spacing. Subsequently, large-scale graphene oxide (GO) was employed as a conductive binder to interconnect the intercalated multilayer Ti 3 C 2 T X , and a reducing agent was incorporated to facilitate self-assembly into a hydrogel. This approach augmented the accessibility of ions and facilitated their transport within the resultant structure. The ZHSC, fabricated with this composite cathode, synergistically integrates the supercapacitor’s high-power density and the battery’s high energy density. The results indicate that the ZHSC exhibited excellent electrochemical performance, featuring a high specific capacitance of 253.86 F g −1 at 1 A g −1 and an impressive energy density of 141.03 Wh kg −1 at 999.99 W kg −1 . Notably, after 5000 charge-discharge cycles at 10 A g −1 , the ZHSC maintained a capacitance retention rate above 87.96 %, highlighting its exceptional cycling stability.
研究领域:
材料科学
·
电化学能源
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2024
·
IF 2
Honglin Xu,Yongsheng Deng,Xinyu Wang,Ruilin Wang
The stable phase equilibrium of the ternary system NaVO3–KVO3–H2O at 298.15 K was investigated using the isothermal solution equilibrium method and the Schreinemaker wet residue method. The equilibrium liquid phase solubility data and physical property data [density (ρ), refractive index (nD), pH] were determined, and X-ray diffraction was utilized to verify the material composition of the equilibrium solid phase. Phase diagrams and physical property–composition diagrams were constructed based on the equilibrium solubility data and physical property data. The results show that the ternary system has a complex salt generation process with two invariant points, three univariate curves, and three crystalline phase regions corresponding to NaVO3·2H2O, KVO3, and Na2mKn(VO3)2m+n, respectively. The solid phase precipitated from a saturated NaVO3 solution at 298.15 K is NaVO3·2H2O, as confirmed by a comparison of experimental results and the literature. The chemical composition of the complex salt generated from the NaVO3–KVO3–H2O ternary system follows the general formula of the Na2mKn(VO3)2m+n complex salt proposed by Druzynski’s group, thereby validating the reliability of the present experiment. This study provides new experimental data for the preparation and separation of metavanadate.
研究领域:
化学热力学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2026
·
IF 19.7
Min Bi,Zhenjie Lu,Pengcheng Yao,Jingwen Sun,Zhen Hou,Pan Xiong,Xin Wang,Junwu Zhu,Yongsheng Fu
Cu single atoms regulate crystalline-amorphous RuO x interfaces • K⁺ enrichment reconstructs interfacial water structure • Accelerated Volmer step via improved proton availability • High HER activity with low overpotential and small Tafel slope • Long-term stability demonstrated in practical AEM electrolyzer The sluggish water dissociation kinetics in alkaline media remains a major bottleneck for efficient hydrogen evolution reaction (HER). Beyond intrinsic active sites, the interfacial microenvironment, particularly local charge distribution and water structure, plays a decisive role in governing reaction pathways. Herein, we report a two-dimensional Cu-modified RuO x catalyst containing carbonaceous components (denoted as Cu-RuO x /C), featuring crystalline-amorphous heterointerfaces that create charge-enriched interfacial regions for regulating the interfacial water network. Cu incorporation generates a charge-enriched surface that promotes the accumulation of K + near the catalyst interface, thereby reconstructing the interfacial hydrogen-bond network. This regulation shortens the K + -surface distance and weakens hydrogen-bond connectivity within interfacial water, leading to a decreased fraction of tetracoordinate hydrogen-bonded water and an increased proportion of free water. Such an optimized interfacial water structure ensures sufficient proton supply during the HER process. As a result, Cu-RuO x /C delivers an ultralow overpotential of 13 mV at 10 mA cm −2 in 1 M KOH and sustains 800 h of operation at 1000 mA cm −2 in an anion exchange membrane water electrolyzer. This work demonstrates highly dispersed Cu modulation as an effective strategy for engineering catalytic microenvironments to enhance alkaline HER. Download: Download high-res image (151KB) Download: Download full-size image Charge-enriched Cu-RuO x heterointerfaces induce K + -driven water reconstruction, accelerating water dissociation and HER kinetics while delivering ultralow overpotential and outstanding durability.
✓ 已验证
DOI
高影响因子
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