CARBON
·
2026
·
IF 12.7
Jiabei Yu,Depeng Zhang,Xinyu Lu,Siqi Wang,Liying Wang,Yuqing Zhang,Sen Zhang,Chao Deng
Dual single-atom catalysts (DACs) provide an efficient clue to conquer the sluggish kinetics of oxygen reactions in Zn-air batteries (ZABs). However, the precise modulation on local microenvironment of DACs sites are still challenging. Herein, we report a defect-driven strategy to manipulate the microenvironment of Fe/Mn dual atomic sites that anchor on a carbon nanofiber (def-FeMn/CNF). Theoretical calculation results reveal that the defects modulate the local microenvironment of dual atom sites, which decreases the energy barrier and enhances the catalytic behaviors. Finite element analysis (FEA) modeling results demonstrate the porous carbon nanofiber is beneficial to mass transports and ensures fast kinetics. Benefitting from both aspects of advantages, the def-FeMn/CNF catalyst displays the superior pH-universal electrocatalytic properties, fast kinetics, and high stability. It exhibits the half-wave potentials of 0.92 V and 0.87 V in alkaline and acidic conditions, which outperform the FeMn-DAC/CNF, N–FeMn/CNF, Fe-SAC/CNF, and Mn-SAC/CNF reference samples. Moreover, the full Zn-air battery (ZABs) with def-FeMn/CNF cathode shows the high power densities of 295 W kg −1 and high stability over long-term (1000 h) cycling. Furthermore, the quasi-solid-state Zn-air batteries achieve a smooth operation over a wide-temperature range and a long-term (800 h) operational stability at curved state. Therefore, the defect-driven approach provides an efficient strategy to manipulate the local microenvironment of DACs for boosted catalytic properties. Moreover, it also gives a new clue to design and fabrication of pH-universal electrocatalysts towards diverse working conditions. Download: Download high-res image (485KB) Download: Download full-size image
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DOI
高影响因子
Nano Energy
·
2021
·
IF 17.881
Rui Qi,Mihai Chu,Wenguang Zhao,Ziwei Chen,Lei Liao,Shisheng Zheng,Xiping Chen,Lei Xie,Tongchao Liu,Yang Ren,Lei Jin,Khalil Amine,Feng Pan,Yinguo Xiao
Sodium-ion batteries (SIBs) with iron- and manganese-based cathode electrodes have exhibited great promise in the grid-scale energy storage systems , on the basis of the satisfactory theoretical capacity, as well as huge abundance, low price and non-toxicity of raw materials. However, the inferior cycle life of cathode materials originating from their poor structural stability remains a formidable challenge towards practical applications. Here, an efficient strategy of improving the structure durability is demonstrated in iron- and manganese-based cathodes by dual heteroatom doping. The as-obtained P2-type Na 0.65 Li 0.08 Cu 0.08 Fe 0.24 Mn 0.6 O 2 cathode delivers superior cyclability (88.2% capacity retention for 500 cycles at 2C), fabulous rate capability (76% capacity retention at 5C compared to 0.1C), and a useable reversible capacity of around 85 mAh g −1 at 0.1C. Through in-depth characterizations, the underlying structure-property relationship is established, revealing that the complete solid-solution reaction during cycling ensures the ultralow volume variation (as small as 0.7%) and excellent electrochemical performance. These results highlight the significance of fabricating a stable host for the design and development of advanced SIBs with long life.
研究领域:
材料科学
·
电化学
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DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2026
·
IF 5.1
Jingbo Wang,Yingzhe Bao,Xiulan Ma,Shan Jiang,Ziyue Zhou,Bo Wang
Norfloxacin (NOR) is widely used in aquaculture; however, its overuse has been shown to cause water pollution. In this research, NOR was chosen as the target pollutant, and agricultural waste, specifically corn cobs, was used to prepare ferromagnetic iron-manganese composite modified biochar (FMBC) for adsorbing NOR from aquaculture wastewater. The adsorption mechanism was explored using various characterization techniques and evaluating the adsorption performance. The results indicate that the optimal modification conditions for FMBC include an iron source concentration of 0.3 M, the iron-manganese ratio is 3:1, with a calcination temperature of 350°C. At pH 6, FMBC achieved an adsorption capacity of 31.17 mg/g for NOR, which is approximately 85.5% and 49.14% higher than that of pristine biochar (BC) and iron-modified biochar (FBC), respectively. The adsorption process obeyed pseudo-second order kinetics and the Langmuir isotherm model. As the temperature increased, the adsorption capacity of FMBC for NOR decreased. The adsorption capacity of FMBC for NOR increased at low concentrations of Cu 2+ (maximum 25 mg/L), but at higher concentrations, it was inhibited. FMBC demonstrated the capacity to maintain NOR removal performance at a rate of greater than 50% following five cycles. The adsorption processes of FMBC for NOR are driven by several factors: pore filling, electrostatic adsorption, hydrogen bonding, surface complexation, π-π interactions, and hydrophobic bonding. In summary,this novel composite material offers promising prospects for mitigating water pollution in aquaculture, making it a cost-effective and sustainable alternative.
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DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2019
·Vol. 26
·期 22
·23162-23172
·
IF 2.914
Yu Jie,Wang Hongjie,Ji Qinghua
In aquatic environment, the existence of antibiotics including sulfadiazine (SDZ) has gain a huge attention. It is suggested that hydrous metal oxides have large potential to remove contaminants in water. The SDZ removal capability by ferric and manganese binary oxides (FMBO) was investigated, and the SDZ removal performance was compared with the ferric hydroxide (HFO) and manganese dioxide (HMO). Our results showed that SDZ removal was highly pH-dependent, but pH has less effect on uptake of SDZ on FMBO than that of the other two adsorbents. The surface acidity constant of FMBO was first calculated to be 6.31 and 8.48, respectively. The uptake process was successfully fitted for according to surface complex formation models (SCFM) and the results of modern surface analytical methods, such as FTIR and XPS, were also consistent with the surface complex uptake mechanism. The uptake of SDZ by FMBO ascribed to specific chemical interaction between the aniline group of SDZ and the hydroxyl groups from FMBO.
研究领域:
环境科学
·
化学
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高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Xin Liu,Liping Yang,Li Chen,Shuxia Li,Peng Li,Yongrong Sun,Ning Kang,Chenglong Wang
It is still challenged to propose a straightforward and in-situ growth method of fabricating perovskite-type metal oxide films with dense and uniform surface coverage. This paper presents a simple strategy to prepare LaBO 3 (where B = Ni, Co, Fe, Mn) films by metal oleate (MO) route, in which metal oleates (La(OA) 3 and (B(OA) x , x = 2 or 3) serve as effective ligands to inhibit the self-aggregation among crystal grains. The as-prepared LaNiO 3 film with uniform and dense surface shows a reduced contact angle (31.5° vs 51.2°) and surface roughness (Ra = 14.2 vs 23.9 nm) compared with film prepared by Sol-gel (SG) method. Finally, the LaNiO 3 film by MO route is successfully employed as hole transport layer (HTL) in perovskite solar cells (PSCs) to obtain a power conversion efficiency (PCE) up to 15.62 %, which is 1.54 times that of PSCs by SG method. This work opens an avenue for fabricating LaBO 3 films with dense and uniform surface coverage by MO route.
研究领域:
材料科学
·
能源科学
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Jianwang Wu,Mei Lin,Ming Liu,Zuliang Chen
Hydrogen peroxide (H 2 O 2 ) is a crucial eco-friendly oxidizer with increasing demand due to its wide range of applications. Activating O 2 with catalysts to generate H 2 O 2 on-site offers a promising alternative to traditional production methods. Here, we design unique crystalline/amorphous heterophase Fe-Mn core–shell chains (ZVI-Mn) for efficient on-site generation of H 2 O 2 and manipulation of subsequent H 2 O 2 activation. The yield of H 2 O 2 on-site produced by ZVI-Mn in water within 5 min was 103.7 mg·L -1 , which was much greater than that of zero-valent iron (ZVI) and amorphous Mn (A-Mn) (0 and 42.5 mg·L -1 ). Raman and density functional theory (DFT) calculations confirmed that *OOH is the key species involved in the on-site generation of H 2 O 2 . Electrochemical tests confirmed the excellent electron-transferring ability, while electron paramagnetic resonance (EPR) revealed oxygen vacancy defects in the catalysts, which proved to be conducive to improving the catalytic activity of ZVI-Mn. Additionally, by regulating the pH of aqueous solution , ZVI-Mn can simultaneously achieve efficient on-site generation of H 2 O 2 and in-situ removal of enrofloxacin from aqueous solution.
研究领域:
环境科学
·
催化化学
·
材料科学
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产品关联
DOI
PubMed
高影响因子
Molecular Catalysis
·
2026
·
IF 4.3
Chao Wang,Ting Fan,Shunfang Lv,Tianfu Zhang,Juan Zhang,Jiangang Chen
A series of hydrophobically modified MnO 2 -coated Fe 3 O 4 (Fe@Mn) catalysts were prepared to investigate the effect of the interaction strength between Fe@Mn and hydrophobically modified SiO 2 (SiO 2 -c) on their physicochemical properties, FTS performance and CO 2 selectivity, including granule mixing of Fe@Mn and SiO 2 -c (Fe@Mn+SiO 2 -c (g)), powder mixing of Fe@Mn and SiO 2 -c (Fe@Mn+SiO 2 -c (p)) and core-shell structure of Fe@Mn@SiO 2 -c. The interaction between Fe@Mn and SiO 2 -c evolves and strengthens with the structural progression from physically mixed to core-shell configurations. Contact angle measurements indicate that Fe@Mn@SiO 2 -c exhibits superior hydrophobicity compared to Fe@Mn+SiO 2 -c (g/p). Fe@Mn+SiO 2 -c (g/p) maintains a CO 2 selectivity comparable to that of Fe@Mn, while exhibiting significantly enhanced stability. Although Fe@Mn@SiO 2 -c shows a relatively lower CO conversion, it achieves the lowest CO 2 selectivity alongside a higher selectivity for light olefins. The study reveals that the altered surface microenvironment of Fe@Mn@SiO 2 -c is the key factor in suppressing the water-gas shift (WGS) reaction activity during FTS, thereby reducing CO 2 selectivity. This work elucidates the underlying mechanism by which the interaction mode between the Fe-based catalyst and the hydrophobic material influences the FTS performance, particularly the CO 2 selectivity.
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高影响因子
JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Kailin Fu,Weijian Chen,Jianmin Liu,Jian Liang
Perovskite oxides are increasingly recognized as cost-effective catalytic materials for facilitating both the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) at the air-electrode electrode of Zn-air batteries (ZABs) and fuel cells. In this study, we have employed a non-hydrolytic sol-gel (NHSG) technique to synthesize La 0.8 Sr 0.2 Co 0.8 X 0.2 O 3-δ (X = Fe, Mn, and Ni) perovskite nanoparticles at a low temperature of 600 °C. Among these perovskite oxides, La 0.8 Sr 0.2 Co 0.8 Fe 0.2 O 3-δ (LSCFO) exhibited the highest specific surface area of 12.68 m 2 g −1 and possessed the greatest number of oxygen vacancies. Specifically, it achieved a higher half-wave potential of 0.657 V for ORR. Meanwhile, it exhibited a lower OER overpotential of 418 mV at a current density of 10 mA cm −2 , along with the smallest ΔE value of 0.991 V. When utilized as an air electrode catalyst for ZABs, LSCFO exhibits a high peak power density of 152.2 mW cm −2 and remarkable long-term cycling stability (100 h at 2 mA cm −2 ), which are close to the performance metrics of commercial Pt/C + RuO 2 catalysts. This study demonstrates the potential to enhance the bifunctional catalytic activity of LaCoO 3 -based perovskite air electrodes for ZABs through a straightforward doping approach within a NHSG process.
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Yu Zhou,Molin Sun,Meilan Cao,Yijin Zeng,Mingru Su,Aichun Dou,Xiaochuan Hou,Yunjian Liu
Layered sodium iron manganese oxide cathodes have attracted great interest owing to their high specific capacity and cost-effective metal resources, while the detrimental phase transitions and surface structural degradation severely limit their commercial applications. In this work, the bulk and surface structure stability of a P 2-Na 0.67 Fe 0.5 Mn 0.5 O 2 cathode can be synergically enhanced by a one-step Li/Nb co-doping strategy. Structural characterizations reveal that Li doping promotes the formation of P 2/O3 biphasic structure and makes the unfavorable P 2-OP4 phase transition convert into a smooth solid-solution reaction. Nb doping enhances the mobility of sodium ions and forms strong Nb-O bonds, thereby enhancing the stability of the TMO 2 layer structure. In particular, the Nb element induces the surface reorganization of an atomic-scale NaNbO 3 coating layer, which could effectively prevent the dissolution of metals and surface side reactions. The synergistic mechanism of enhanced electrochemical performance is proved by multiple characterizations during cycling. As a result, the as-prepared Na 0.67 Li 0.1 Fe 0.5 Mn 0.38 Nb 0.02 O 2 exhibits improved capacity retention of 85.4 % than raw material (45.7 %) after 100 cycles at 0.5C (1C = 174 mA g −1 ) within 2.0–4.0 V. This co-regulating strategy provides a promising approach to designing highly stable sodium-ion battery cathodes. Furthermore, a full cell of Na 0.67 Li 0.1 Fe 0.5 Mn 0.38 Nb 0.02 O 2 with hard carbon displays excellent cycling stability (85.1 % capacity retention after 100 cycles), making its commercial operation possible. This synergistic strategy of biphasic structure and surface reorganization is a critical route to accelerate the application of layer oxide cathodes.
研究领域:
材料科学
·
电化学
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Haiying Li,Shishuai Sun,Wen Cui,Xiaolan Li,Chuanjia Kou,Zhihui Xu,Zhihui Zhang
Reasonably regulating the dimensionality and interface of an electrode material can effectively improve its surface chemical reactivity, charge transfer rate, and ion transport performance, which is crucial to solving several problems with supercapacitors , including low energy density and poor cycle stability. The multidimensional hybrid morphology of Co-Fe carbonate hydroxide (CH) coupled with Co-Mn layered double hydroxide (LDH) is generated directly on the nickel foam substrate by a two-stage process. The prepared multidimensional hybrid materials with pore morphology with the synergistic effect of 1D nanorods , 2D nanosheets , and 3D “porous coral” not only ensure sufficient contact between the electrolyte and electrode material but also enhance the charge transfer and ion diffusion of the electrolyte. The strong coupling effect of Co, Fe, and Mn metals between the heterojunction surface can produce various ionic valence states and high conductivities, resulting in increased redox activity, which thus improves the electrochemical performance. The results of the electrochemical performance test show that when the current density is 10 mA cm −2 , the high area-specific capacitance of 7.33 F cm −2 is two times (3.85 F cm −2 ) that of a Co-Fe CH electrode and five times that of a Co CH electrode. The quasi-solid state asymmetric supercapacitor with a Co-Fe-Mn positive electrode and an active carbon negative electrode displays an energy density of 0.723 mWh cm −2 at a power density of 8.53 mW cm −2 . After 5500 cycles, the apparatus exhibits 101.72 % of the initial capacitance, which can effectively drive small electrical appliances. The results indicate that the supercapacitor exhibits excellent cycle stability and application potential in energy storage.
研究领域:
材料科学
·
电化学
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Ping Zhang,Guohua Zhang,Yukun Liu,Yuxin Fan,Xinyue Shi,Yiming Dai,Shiwen Gong,Jingrong Hou,Jiwei Ma,Yunhui Huang,Renyuan Zhang
Fe/Mn-based layered oxide cathode is regarded as a competitive candidate for sodium-ion batteries (SIBs) because of its high theoretical capacity, earth abundance and low cost. However, its poor cycling stability still remains a major bottleneck. Herein, P 2/O3 biphasic Na 0.67 Fe 0.425 Mn 0.425 Cu 0.15 O 2 layered oxide is successfully synthesized via a sol–gel method. It is observed that Cu substitution can facilitate the conversion of P 2 to O3 phase, and the P 2/O3 composite structure can be obtained with an appropriate amount of Cu. Meanwhile, in-situ XRD reveals that constructing P 2/O3 composite structure can realize the highly reversible phase transition process of P 2/O3– P 2/ P 3–OP4/OP2 and decrease the lattice mismatch during Na + insertion/extraction. Consequently, the biphasic P 2/O3-Na 0.67 Fe 0.425 Mn 0.425 Cu 0.15 O 2 electrode exhibits 87.1 % capacity retention after 100 cycles at 1C, while the single phase P 2-Na 0.67 Fe 0.5 Mn 0.5 O 2 electrode has only 36.4 %. Therefore, the constructing biphasic structure is proved to be an effective strategy for designing high-performance Fe/Mn-based layered oxide cathodes.
研究领域:
材料科学
·
电化学
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DOI
高影响因子
Results in Chemistry
·
2026
·
IF 5.8
Xianping Luo,Sihao Yu,Hepeng Zhou,Yongbing Zhang,Jin-Ru Feng
Porous biochar derived from discarded corn stalks was developed as a regenerable adsorbent for treating Tl-containing wastewater. The Tl adsorption capacity of Fe–Mn–Y doped biochar (FMYBC) was significantly enhanced compared to unmodified biochar. The IPD model accurately described Tl(I) adsorption on FMYBC, indicating that intraparticle diffusion is a key controlling step. Removal efficiency remained largely stable over a broad initial pH range of 3–13. Doping with rare earth elements markedly improved the adsorption performance of Fe Mn modified biochar under acidic conditions. However, the presence of coexisting ions (Na + , Mg 2+ , Ca 2+ ) reduced FMYBC's Tl + adsorption capacity. After two adsorption–desorption cycles, MFYBC retained 86.4% of its initial Tl removal capacity, demonstrating good stability and regeneration potential. Based on XPS and FTIR analyses, the primary Tl(I) removal mechanisms include ion exchange, surface complexation, and oxidation.
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高影响因子
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