CATALYSIS COMMUNICATIONS
·
2019
·
IF 3.674
Feng Wang,GuoQin Qi,ChuanQi Zhang,HeCheng Ren,Hua Ma,Yu Guo
A series of Na-doped Pt/Al 2 O 3 catalysts with 0.2 wt% of Pt loading and 0–6 wt% Na loading was prepared to investigate the HCHO complete oxidation at room temperature. Powder XRD, BET and XPS were used to characterize the bulk structure and texture of catalysts, as well as the ratio of hydroxyl oxygen to lattice oxygen. A long-term catalyst stability test (50 h on reaction stream) was conducted under severe conditions of a large space velocity of 180,000 mL/h/g, a high HCHO concentration of 80 ppm and dry conditions (relative humidity of 0%). An appropriate amount of doped-Na (2 wt%) contributed to a remarkable improvement of activity and stability of the Na-doped 0.2 wt% Pt/Al 2 O 3 catalyst.
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DOI
高影响因子
Materials Chemistry Frontiers
·
2017
·Vol. 1
·期 12
·2656-2663
·
IF 0
Chen Wu,Yuehua Wei,Qingwang Lian,Chao Cui,Weifeng Wei,Libao Chen,Chengchao Li
Enhancing the conductivity of electrode materials is critically important for improving the high-rate performance of Na-ion batteries (NIBs). Herein, we report a multifaceted strategy for optimizing the conductivity and electrochemical properties of nickel cobalt selenides via the combination of fine component regulation and C coating. The electrical conductivity of C@Ni0.33Co0.67Se2/C nanofiber (CNF) (Co0.67) hybrids achieved in this study was 0.3733 S mm−1, a conductivity five-fold higher than that of selenides with a Ni/Co ratio of 2 : 1. Coupled with desirable three-dimensional (3D) nanobrush morphology and the 1D conducting path of CNFs, the Co0.67 electrode achieved a superior rate performance of 413.1 mA h g−1, even at 2 A g−1. Furthermore, the Co0.67 electrode exhibited an impressive cycling performance of 499 mA h g−1 after 100 cycles (exhibiting an 89.5% capacity retention of the second cycle). Finally, electrochemical impedance spectroscopy (EIS) and cyclic voltammetry analysis at different sweep rates were conducted to demonstrate the Co0.67 electrode's fast charge/ion transport ability and increased electrode kinetics.
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ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Jiachen Li,Jun Pu,Ziqiang Liu,Jian Wang,Wenlu Wu,Huigang Zhang,Haixia Ma
The energy and power densities of rechargeable batteries urgently need to be increased to meet the ever-increasing demands of consumer electronics and electric vehicles. Alloy anodes are among the most promising candidates for next-generation high-capacity battery materials. However, the high capacities of alloy anodes usually suffer from some serious difficulties related to the volume changes of active materials. Porous supports and nanostructured alloy materials have been explored to address these issues. However, these approaches seemingly increase the active material-based properties and actually decrease the electrode-based capacity because of the oversized pores and heavy mass of mechanical supports. In this study, we developed an ultralight porous nickel to scaffold with high-capacity SnSb alloy anodes. The porous-nickel-supported SnSb alloy demonstrates a high specific capacity and good cyclability for both Li-ion and Na-ion batteries. Its capacity retains 580 mA h g–1 at 2 A g–1 after 100 cycles in Li-ion batteries. For a Na-ion battery, the composite electrode can even deliver a capacity of 275 mA h g–1 at 1 A g–1 after 1000 cycles. This study demonstrates that combining the scaffolding function of ultralight porous nickel and the high capacity of the SnSb alloy can significantly enhance the electrochemical performances of Li/Na-ion batteries.
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DOI
PubMed
高影响因子
Water
·
2024
·Vol. 16
·期 7
·921
·
IF 3
Teng-Zhou Li,Cheng-Zhuang Chen,Shao-Ying Xing,Ling Liu,Ping Li,Zhi-Hua Li
Triphenyltin (TPT) is an organotin pollutant widely found in the aquatic environment. It has endocrine-disrupting and osmotic pressure toxicity. In this study, the physiological and biochemical effects of TPT and various salinities were investigated in different tissues (gut, gill, and brain) of marine medaka. The exposure experiments were conducted for 42 days in different salinities (0, 15, and 30 ppt) without TPT exposure and in different salinity groups with TPT exposure concentrations of 100 ng/L, respectively. The results showed that the Na+-K+-ATPase (NKA) and Ca2+ATPase activity had significant tissue-specific differences, with the highest activity observed in the gills, indicating their major contribution to osmoregulation. Changes in salinity also resulted in significant alterations in the ion concentrations of the gut and gill tissues in the 0-C and 15-C groups. While the changes in Na+and Cl−were relatively stable, the presence of TPT disrupted the regulation of Ca2+and K+. In conclusion, substantial variations were observed in the osmoregulatory capacity of marine medaka tissues. Environmental concentrations of TPT had little effect on osmotic enzyme activity but interfered with the regulation of Ca2+and K+concentrations in the tissues. This study provides valuable insights into the osmotic toxicity of TPT in aquatic environments with different salinities.
研究领域:
环境科学
·
水生毒理学
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海洋生物学
·
生理学
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
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2025
·
IF 2.5
Enyu Zhan,Fengchao Wang,Jun Wang,Yu Sun,Jing Yang,Canyun Zhang,Jinfang Kong,Lan Li,Jin Chen
In recent years, the lead-free halide perovskite has been extensively studied due to the the lead toxicity and poor stability of lead halide perovskite. Cs2AgInCl6 has shown great potential to replace lead halide perovskites in optoelectronic applications. However, this perovskite synthesis method needs to involve high temperature, the synthesis conditions are relatively harsh. In this work, a simple solid-phase grinding method was employed to prepare Na+ and Bi3+ doped perovskite Cs2Ag1-xNaxIn1-yBiyCl6 with systematically characterization of both the structure and optical performance. The experimental results showed that a photoluminescence quantum yield (PLQY) of 13.1% was achieved by breaking the parity-forbidden transition through 4% Bi³⁺ doping. Subsequently, the incorporation of 60% Na⁺ suppressed non-radiative transitions and increased the PLQY to 56.9%. The Cs2Ag0.4Na0.6In0.96Bi0.04Cl6 samples were encapsulated on ultraviolet (UV) LED chips to obtain warm-yellow LED with good performances, which shows that promising applications in the LED field.
研究领域:
材料科学
·
光电子学
·
纳米技术
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固态化学
·
发光二极管（LED）
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DOI
高影响因子
ADVANCED MATERIALS
·
2025
·
IF 26.8
Ruizeng Luo,Yijie Fan,Yilin Qi,Yuan Bai,Meng Xiao,Yujia Lv,Jinrui Liang,Mingcheng Tang,Jiaping Zhang,Zhou Li,Dan Luo
Endogenous electric field (EF) originating from differences in ionic gradients plays a decisive role in the wound healing process. Based on this understanding, a self-manipulating sodium ion gradient-based endogenic electrical stimulation dressing (smig-EESD) is developed to achieve passive, non-invasive, endogenic electrical stimulation of wounds, which avoids the side effects of electrode occupancy, electrochemical reactions, and thermal effects present in traditional exogenous electrical stimulation. smig-EESD reduced the potential at the center of the wound by specifically absorbing Na+ in the exudate, ultimately strengthening the wound endogenous EF. Importantly, smig-EESD converted the active transport dependent on Na + /K + -ATPase into passive diffusion by adsorbing extracellular matrix Na+, and the saved ATP consumption promoted tissue repair process. smig-EESD regulated innate and adaptive immune responses by upregulating the secretion of multiple cytokines, thereby suppressing injury-associated inflammatory responses and reducing scar formation. smig-EESD reveals an endogenic electrical stimulation strategy that is independent of electrodes and circuits, and provides new insights into the future development of electronic medicine.
研究领域:
生物医学工程
·
伤口愈合
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组织工程
·
电疗法
·
免疫学
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DOI
PubMed
高影响因子
FUEL
·
2024
·
IF 6.7
Wenxia Zhang,Hongtao Zhang,Mohamed Abbas,Juan Zhang,Zhijun Huang,Sibudjing Kawi,Jiangang Chen
The advancement of large-scale and environmentally-friendly solid-state synthesis methods is of paramount importance for the production of precipitated catalysts, notably Fe-based catalysts utilized in Fischer-Tropsch synthesis (FTS). In this study, we present an innovative solvent-independent, wastewater-free solid-state approach for the synthesis of highly efficient Fe/ZrO 2 catalysts, elucidating the mechanisms of promotion within this specific methodology. The prepared catalysts underwent rigorous evaluation under industrially-relevant FTS conditions (230–270 °C, 20 bar, and WHSV = 5400 mL/(g cat ⋅h)). A comprehensive suite of characterization techniques was employed to establish the intricate interplay between catalytic activity and structural attributes. We meticulously examined the impact of Na as an alkali promoter and the role of transition metals (Cu and Mn) in enhancing FTS catalytic performance. The catalytic outcomes obtained clearly demonstrate the pivotal role of the synergistic interaction between Mn and Na within the Na-Mn-Fe/ZrO 2 catalyst system in driving the FTS reaction. This synergism significantly enhances FTS performance, yielding an impressive CO conversion rate (89.91 %) while maintaining low selectivity to CH 4 (7.75 %). The incorporation of Mn and Na into the catalyst matrix enhances the dispersion of Fe 2 O 3 , thereby improving the reducibility of Mn/Fe oxides and elevating the electron density on the catalyst surface. These factors facilitate the formation of active Hägg iron carbide (χ-Fe 5 C 2 ), stimulating chain propagation and ultimately leading to the generation of valuable C 5+ hydrocarbon products, which underscores its potential as an optimal candidate for future industrial applications in Fe-based Fischer-Tropsch synthesis.
研究领域:
催化
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化学工程
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环境科学
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材料科学
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Dongya Ma,Shuzhi Yan,Xinru Xue,Miao Niu,Hongliang Li,Deyu Bao,Chao Zhao,Xiujun Li,Peng Wang,Rong Li,Lei Huang,Miao Yu,Sitong Jia,Yanjiao Wang,Xiao Li,Zhen Zhang,Tie Wang
Hydrogen-bonded organic frameworks (HOFs) become promising candidates in the capacitive deionization (CDI) technology due to their prominent redox reaction. Herein, the novel CNTs@HOF-DAT composite with the three-dimensional interwoven-network structure is prepared by the facile solvothermal synthesis and applied to the CDI technology for the first time. The synergistic effect between the special structure of HOF-DAT (multiple hydrogen bonds, abundant heteroatoms and π-π interactions) and the high conductivity of CNTs stimulates more redox active sites for the ion storage and accumulation in the CNTs@HOF-DAT composite. This makes the CNTs@HOF-DAT electrode have a high specific capacitance (152.5 F∙g −1 ) and an improved pseudo-capacitance contribution (49 %). Also, the ion removal capacity (16.33 mg∙g −1 ) of the CNTs@HOF-DAT electrode greatly surpasses that of the single HOF-DAT electrode (3.23 mg∙g −1 ) and CNTs electrode (8.77 mg∙g −1 ). Significantly, the desalination mechanism of the CNTs@HOF-DAT composite electrode is explored in terms of the electrode configurating mode and zero-charge potential of the three prepared electrodes, as well as the redox reaction of the HOF-DAT molecules, which manifests that the CNTs@HOF-DAT electrode is suitable as the cathode of the CDI cell.
研究领域:
材料科学
·
环境工程
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Caiyan Yu,Linying Yang,Shuwei Sun,Di Chen,Yanfeng Yin,Hui Ying Yang,Ying Bai
Due to their high theoretical specific capacities and good structural compatibility, O3-layered oxides are considered as high-performance cathode candidates for sodium-ion batteries. However, serious side reactions and structural degradation during long-term cycling have greatly hindered their practical applications. Herein, O3-type NaNi 0.5 Mn 0.5 O 2 (NNMO) was prepared by partially substituting Ni 2+ with Cu 2+ and inducing CuO surface coating to enhance the structural stability without sacrificing the high capacity. In Particular, Cu 2+ incorporated at a molar ratio of 0.10 greatly improved the electrochemical performance of pristine NNMO. The NaMn 0.5 Ni 0.4 Cu 0.1 O 2 electrode exhibited a capacity retention of 64.5% after 300 cycles at 0.5 C. Microscopic and spectral studies revealed that the CuO coating layer suppressed detrimental side reactions upon cycling. Moreover, the bulk doping of Cu 2+ ultimately enhanced the structural stability by mitigating irreversible phase transitions. Hence, the integration of bulk Cu 2+ doping and CuO surface coating contributed to the increased structural stability and electrochemical performance of NNMO. The doping and coating dual-modification strategy established in this work effectively suppressed the side reactions and structural degradation of NNMO, and this work provides new insight into the effective design of electrode microstructures for use in high-performance batteries.
研究领域:
材料科学
·
能源存储
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DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2020
·
IF 8.247
Chongyang Hao,Lina Chen,Yamin Zhang,Xiaowen Zheng,Linna Dai,Lijie Ci
Cations preintercalation is an effective way to optimize the crystal structure and improve the electrochemical behavior. An Ag + pre-intercalated Ag x MnO 2 material with ultrafine nanowire structure is prepared by a facile hydrothermal method . With optimized crystalline microstructure including expanded interlayer space and introduced multivalence of Mn, the as-prepared material exhibits superior performance as cathode for both Li-ion and Na-ion hybrid supercapacitors (HSCs). High specific capacitance of 424.7 F g −1 in Li 2 SO 4 electrolyte and 450.1 F g −1 in Na 2 SO 4 system are achieved. The assembled HSCs using Ag x MnO 2 and activated carbon (YEC-8A) as electrode materials deliver a wide operation potential window of 0–2.2 V and a high energy density of 204.30 Wh kg −1 at the power density of 167.15 W kg −1 for Li-ion HSCs and 131.08 Wh kg −1 at 107.25 W kg −1 for Na-ion HSCs. Furthermore, the as-fabricated HSCs deliver excellent cyclic stability. The capacitance retention is 79.4% after 20,000 cycles for Li-ion HSC and 84.9% after 10,000 cycles for Na-ion HCS .
研究领域:
材料科学
·
电化学
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DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Xuan-Yu Yang,He-Jie Wang,Hao-Nan Chen,Li-Juan Yue,Fei-Long Gong,Ke-Feng Xie,Shi-Zhong Wei,Yong-Hui Zhang
Electronic modulation of Pt sites is of great significance in catalytic reaction involved chemical engineering process. Alkali metal doping is a promising strategy to modify the d orbit of Pt, which can effectively affect the reaction between material and adsorbates, however, the relationship is still unclear. Here, we have rationally designed Pt-modified Na-doped WO 3 nanorods, and the electronic modulation of Pt can be finely modified by Na doping. The Pt-Na/WO 3 -Ar nanorods exhibit excellent H₂S sensing performance, with high response (R a /R g = 701 @ 1 ppm), low operating temperature (110 °C), and detection limit as low as 2.42 ppb. Experimental and theoretical results indicate that the introducing of Na effectively enhances the interaction between Pt nanoparticles (NPs) and WO 3 . Additionally, Na doping successfully modulate the d-band center of Pt, optimizing the adsorption and desorption processes during sensing. The synergistic effects of these components enable the Pt-Na/WO 3 -Ar sensor to exhibit outstanding H₂S sensing performance. Notably, the fabricated sensors are further used to monitor the hydrogen sulfide (H 2 S) of halitosis biomarkers, which holds significant application potential in environmental protection and medical diagnostics.
研究领域:
材料科学
·
传感器技术
·
纳米材料
·
表面化学
·
环境监测
·
医学诊断
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Xuemin Yin,Hejun Li,Haiqi Wang,Zhiyong Zhang,Ruimei Yuan,Jinhua Lu,Qiang Song,Jian-Gan Wang,Leilei Zhang,Qiangang Fu
Prussian blue (PB) and its analogues (PBA), especially with hollow structures, have attracted growing attention from the researchers of energy storage field. Herein, we have developed a facile self-templating method to synthesize hollow-structured cobalt hexacyanoferrate (CoHCF) with controllable morphologies by using water-soluble precursors as templates. The method is versatile and can be extended to synthesize various PB/PBA hollow structures with tunable composition and morphology. Profiting from the unique hollow structure, the CoHCF hollow prisms manifest exceptional electrochemical performance in the Na2SO4 aqueous electrolyte, including a high specific capacitance (284 F g–1 at 1 A g–1), a high rate capability, and an excellent cycling stability (92% retention after 5000 cycles). A hybrid supercapacitor device assembled with the CoHCF hollow prisms and activated carbon shows a high specific density of 47 W h kg–1 at a specific power of 1000 W kg–1 and stable cycling performance.
研究领域:
材料科学
·
能源存储
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DOI
高影响因子
危险品化学品经营许可证（带存储）