Nano-Micro Letters
·
2026
·Vol. 18
·期 1
·257
·
IF 38.5
Zhou Yin,Yin Kun,Zhang Tian,Feng Dongyu,Li Jiapei,Zhu Anquan,Lin Dewu,Xue Pan,Liu Yu,Liu Yongyu,Liu Kai,Liu Kunlun,Luan Chuhao,Yang Huawei,Chen Hou,Yao Yagang,Hong Guo
PtFe catalyst was rationally designed based on frontier molecular orbital theory to investigate orbital-level interactions for enhanced oxygen evolution reaction activity in Li–O 2 batteries.
The d z 2 – d z 2 orbital coupling between Fe and Pt leads to electron donation from Fe to Pt, increasing electron population in the Pt d z 2 orbital.
Excess electrons from the Pt d z 2 orbital occupy antibonding states with LiO 2 , weakening interaction strength and boosting oxygen evolution reaction kinetics.
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高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2016
·
IF 2.628
Na Li,Dan Xu,Di Bao,Jinling Ma,Xinbo Zhang
Rechargeable Na-O 2 batteries have attracted significant attention as energy storage devices owing to their theoretically high energy storage capacity and the natural abundance of sodium. However, practical applications of this type of battery still suffer from low specific capability, poor cycle stability, instable electrolytes, and unstable polymer binders. Herein, we report a facile method of synthesizing binder free and flexible cathodes with Co 3 O 4 nanowire arrays vertically grown onto carbon textiles. When employed as a cathode for Na-O 2 batteries, this cathode exhibits superior performance, including a reduction of charge overpotential, high specific capacity (4687 mAh/g), and cycle stability up to 62 cycles. These enhanced performance can be attributed to the synergistic effect of the porosity and catalytic activity of the Co 3 O 4 nanowire catalyst.
研究领域:
材料科学
·
能源存储技术
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MOLECULES
·
2024
·Vol. 29
·期 10
·2255
·
IF 4.2
Yan Cui,Zequan Zeng,Yaqin Hou,Shuang Ma,Wenzhong Shen,Zhanggen Huang
Noble metals have become a research hotspot for the oxidation of light alkanes due to their low ignition temperature and easy activation of C-H; however, sintering and a high price limit their industrial applications. The preparation of effective and low-noble-metal catalysts still presents profound challenges. Herein, we describe how a Ru@CoMn2O4spinel catalyst was synthesized via Ru in situ doping to promote the activity of propane oxidation. Ru@CoMn2O4exhibited much higher catalytic activity than CoMn2O4, achieving 90% propane conversion at 217 °C. H2-TPR, O2-TPD, and XPS were used to evaluate the catalyst adsorption/lattice oxygen activity and the adsorption and catalytic oxidation capacity of propane. It could be concluded that Ru promoted synergistic interactions between cobalt and manganese, leading to electron transfer from the highly electronegative Ru to Co2+and Mn3+. Compared with CoMn2O4, 0.1% Ru@CoMn2O4, with a higher quantity of lattice oxygen and oxygen mobility, possessed a stronger capability of reducibility, which was the main reason for the significant increase in the activity of Ru@CoMn2O4. In addition, intermediates of the reaction between adsorbed propane and lattice oxygen on the catalyst were monitored by in situ DRIFTS. This work highlights a new strategy for the design of a low-noble-metal catalyst for the efficient oxidation of propane.
研究领域:
催化
·
化学工程
·
材料科学
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高影响因子
LANGMUIR
·
2024
·
IF 3.7
Xinpeng Chen,Aijing Li,Ping Yao,Jiapeng Wang,Tieling Xing,Guoqiang Chen
In this work, sea urchin-like magnetic Fe3O4@CA/BNNS/AgNP composite microspheres were successfully prepared. The photocatalytic performance of composite microspheres for the organic dye rhodamine B (RhB) was systematically investigated under different conditions, and the catalytic degradation rate of RhB was as high as 95% within 60 min; after three cycles of recycling, the degradation rate of RhB was reduced by only 8%. The main active agents in the reaction are e– and •O2–. Fe3O4@CA/BNNS/AgNP microspheres prepared in this study exhibit photocatalytic and electrochemical properties, making them easy to separate. This work is not limited to the development of Fe3O4-based catalysts but also is expected to provide ideas for the research and progress of photocatalytic composite catalysts with electrochemical properties.
研究领域:
材料科学
·
环境科学
·
纳米技术
·
化学工程
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CHINESE JOURNAL OF CATALYSIS
·
2015
·
IF 1.964
Yan Li,Bing Li,Ting Chen,Zhicheng Zhou,Jun Wang,Jun Huang
A vanadium doped graphitic carbon nitride catalyst has been prepared and used for the direct hydroxylation of arenes with O 2 . Substituted arenes with electron-withdrawing groups such as CN, NO 2 , COOH, CF 3 , and COCH 3 were oxygenated to the corresponding phenols in moderate yields. The catalyst also proved applicable for the hydroxylation of aromatic halides (F, Cl, and Br) with O 2 .
研究领域:
化学
·
催化科学
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高影响因子
POLYMER TESTING
·
2024
·
IF 5
Jiajia Zeng,Chongxian He,Xinna Bai,Cijun Shuai,Hao Pan
Photodynamic therapy (PDT) has great potential for tumor therapy because of its non-invasive and high selectivity. However, the therapeutic effect of PDT is critically restricted by hypoxia and glutathione (GSH) overexpression in the tumor microenvironment (TME). In this work, CeO 2 with catalase and peroxidase dual enzyme activities was loaded on Ti 3 C 2 nano-sheet, and the nanosystem was then introduced in poly-L-lactic acid (PLLA) and prepared into bone scaffold using selective laser sintering technology. Specifically, CeO 2 alleviates hypoxia through its catalase enzyme activity, which promotes the continuous photodynamic process. CeO 2 also consumes over-expressed GSH through its redox reaction and amplifies the oxidative stress in TME, thus improving the curative effect of PDT. On the other hand, the photothermal effect of scaffold can not only generate heat to kill tumor cells, but also enhance the activity of nanoenzyme, and the catalase activity enhanced by photothermal effect is fed back to PDT, forming a two-way promotion. The results indicated that the concentration of oxygen in PLLA/Ti 3 C 2 -CeO 2 scaffold group was 9.76 mg/L higher, and the concentration of singlet oxygen ( 1 O 2 ) and hydroxyl radical (·OH) was respectively increased by 60% and 170%, compared with the PLLA/Ti 3 C 2 scaffold. Moreover, the PLLA/Ti 3 C 2 -CeO 2 scaffold showed a higher GSH consumption rate, indicating that it could consume the overexpressed GSH. Therefore, the Ti 3 C 2 nano-sheet loaded with CeO 2 could combine the dual enzyme activities, photodynamic and photothermal effect to enhance the tumor therapy with a tumor growth inhibitory effect of approximately 88.8%. In summary, introducing the Ti 3 C 2 nanosystem loaded with nanozyme into PLLA scaffold is a promising strategy to develop bone scaffold with multimodal anti-tumor function.
研究领域:
生物医学工程
·
肿瘤治疗学
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高影响因子
BIOMACROMOLECULES
·
2025
·
IF 5.4
Huangjingyi Chen,Yue Ma,Tian Huang,Liang Liu,Juan Yu,Ruoxian Jia,Meijuan Chen,Lin Lin,Xin Li,Zhiguo Wang,Yimin Fan
Nanomaterial-based hydrogels derived from natural silk have garnered significant attention in advanced applications. However, preparation of silk fibroin nanofibers by directly disintegrating natural silk fibers remains challenging. We initiated the process by employing various pretreatment methods to loosen the intricate structure of the natural silk fibers. Subsequently, carboxyl groups were introduced to the silk fibroin surface using a sequential TEMPO/Laccase/O2 (TLO) oxidation approach, whereby the fabrication of silk nanofibers (TLO-SNFs) or nanocrystals (TLO-SNCs) was achieved with a high carboxyl content (ranging from 0.795 to 0.935 mmol/g) and nanofiber lengths of up to 1843 ± 659 nm. Furthermore, TLO-SNFs were further incorporated with poly(N-isopropylacrylamide) (PNIPAm) through acetic acid coagulation, whereby a reinforced TLO-SNF@PNIPAm hydrogel was constructed with an interpenetrating network. It exhibited excellent mechanical performance and demonstrated shape-retaining shrinkage–expansion capabilities, significantly extending the release time of curcumin to 2 weeks. This makes TLO-SNF@PNIPAm an ideal carrier for the long-term in vitro release of curcumin, offering potential applications in responsive transdermal patches.
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CHINESE JOURNAL OF CHEMISTRY
·
2016
·Vol. 35
·期 1
·35-40
·
IF 1.872
Xuan Shao,Tao Zhang,Zhaoyin Wen
Conventional binders in the cathode of Li-O 2 batteries are insulated, and integrate with the catalyst and the conducting carbon-support by physical mixing. This limits the transfer of electrons, degrades the cathode structure due to swelling, and finally leads to capacity fading and is deleterious to cycleability. In this study, we realized, for the first time, a one-step fabricated Co 3 O 4 -PPy cathode characterized by an in-situ formed conductive polymer binder. The functional binder, polypyrrole (PPy), was synthesized through electrical method, which acted as both the binder and supporting material in the Li-O 2 battery. Based on the conductive property of PPy, we obtained the Co 3 O 4 -PPy@Ni electrode via the process of CV electro-deposition. This method results in uniform distribution of Co 3 O 4 nanoparticles and can simplify the preparation process of the air cathodes. The Li-O 2 battery with the Co 3 O 4 -PPy@Ni cathode can discharge/charge for over 30 cycles under the limited specific capacity of 1000 mAh/g. The cycleability and impedance spectra of the Li-O 2 battery with the functional binder of PPy are superior to the battery with conventional binders.
研究领域:
材料科学
·
电化学
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高影响因子
RSC Advances
·
2025
·Vol. 15
·期 29
·23819-23826
·
IF 4.6
Yanhong Ding,Zhichao Gao,Rongpeng Lin,Yong Cao,Haoyang Liu,Yulin Zhou,Haifeng Xu,Jiayi Liu,Fangqi Ren,Yirong Zhu
Lithium–oxygen (Li–O2) batteries are considered an important candidate for the next generation of energy storage systems due to their ultra-high theoretical energy density (11 586 mA h g−1), but their slow kinetic reactions, high overpotential and cyclic instability seriously limit their practical applications. In this study, sulfur modified Mo2C (S@Mo2C) cathode materials were prepared by hydrothermal synthesis by sulfur (S) doping to optimize the electronic structure and catalytic activity of Mo2C (Mo2C). Experiments show that S@Mo2C exhibits significantly improved electrochemical performance compared to commercial Mo2C: its specific capacity is up to 3955 mA h g−1 (commercial material only 508 mA h g−1), the charge and discharge overpotential is reduced to 0.26 V (53.6%), and the capacity retention rate remains 77.8% after 250 cycles. X-ray diffraction (XRD), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS) analysis showed that the introduction of sulfur induced the formation of a heterostructure of MoS2/MoS3 in the Mo2C lattice, which enhanced the conductivity and oxygen reduction/precipitation (ORR/OER) activity of the material. In addition, sulfur doping promotes the formation of highly conductive amorphous Li2O2 and effectively inhibits the accumulation of insulating ring Li2O2, thus significantly improving the cycle stability and energy efficiency of the battery. This study provides a new structural regulation strategy for the design of high efficiency lithium oxygen battery catalysts.
研究领域:
能源存储
·
材料科学
·
电化学
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Energy Storage Materials
·
2022
·
IF 20.831
Jingning Lai,Nan Chen,Fengling Zhang,Bohua Li,Yanxin Shang,Liyuan Zhao,Li Li,Feng Wu,Renjie Chen
High energy density lithium-oxygen (Li-O 2 ) batteries require soluble catalysts to accelerate the kinetics of oxygen reduction/evolution reaction (ORR/OER), and require SEI forming additives to protect lithium metal anode from side reaction with solvents, reduced oxygen species and soluble catalysts. In this study, a tri-functional additives 1-methyl, 3-benzyl, 1H imidazolium bromide (IMPBr) is dissolved in the dimethyl sulfoxide (DMSO)-based electrolyte to solve the problems of the slow dynamic process of ORR and OER, and protect the lithium anode by suppressing the dendrite formation in O 2 atmosphere. During discharging, IMP + has a strong binding ability to the intermediate product O 2 − , and Br − is highly associated with Li + , helping drive the solvation mechanism. During charging, Br − mediates the decomposition of battery discharge products and reduces the charge overpotential. Meanwhile, the positively charged IMP + can be attracted to the surface of the anode via electric attraction, in situ forming a stable SEI layer to prevent DMSO, Br 3 – , and Br 2 from attacking the lithium metal and growth of lithium dendrites. The synergy effect of the IMP + and Br – improves the cycle and rate performance of the Li-O 2 battery.
研究领域:
电化学
·
材料科学
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高影响因子
ADVANCED MATERIALS
·
2015
·Vol. 27
·期 44
·7150-7155
·
IF 17.493
Zhu Y,Zhou W,Chen Y,Yu J,Liu M,Shao Z.
Layered LiCo0.8 Fe0.2 O2 demonstrates dramatically enhanced oxygen evolution reaction (OER) activity and durability in an alkaline solution over LiCoO2 and other reported state-of-the-art catalysts, including benchmark IrO2 . This superior performance is attributed to Fe-doping-induced synergistic effects.
研究领域:
电化学
·
材料科学
·
催化
·
能源材料
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高影响因子
ACS Nano
·
2025
·
IF 16
Yingbi Chen,Qingguo Feng,Yu Bai,Meng Wang,Yuchao Wang,Peiyao Yang,Danni Deng,Xinran Zheng,Jiabi Jiang,Haitao Zheng,Guozhao Fang,Yi Zeng,Xiang Xiong,Yongpeng Lei
Electrochemical two-electron oxygen reduction reaction (2e– ORR) to produce hydrogen peroxide (H2O2) is attractive, but poor H2O2 selectivity and activity need to be overcome. Herein, a phosphorus-induced electron pump is demonstrated. The H2O2 selectivity reaches >90% (93.5% at 0.5 V) in the potential range of 0.2∼0.7 V. The Faradaic efficiency achieves 94.2% at 0.6 V. In situ Raman experiment and density functional theory calculation indicate that the O2 adsorption and activation are enhanced. The *OOH intermediates are formed at a more positive potential. Furthermore, the universal mechanism of the electron pump is extended. At last, the potential to degrade antibiotics, Escherichia coli, etc., on site is confirmed. This work displays that the phosphorus-induced electron pump activates O2, which provides an insight into the electrocatalytic 2e– ORR.
研究领域:
电化学
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催化
·
材料科学
·
环境科学
·
化学工程
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高影响因子
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