Advanced Energy Materials
·
2022
·Vol. 12
·期 12
·2102764
·
IF 29.698
Zongqiang Sun,Xiaodong Lin,Wenjie Dou,Yanyan Tan,Ajuan Hu,Qing Hou,Ruming Yuan,Mingsen Zheng,Quanfeng Dong
The large charge overpotential and poor cycling stability triggered by sluggish Li 2 O 2 oxidation kinetics and severe superoxide-related side reactions greatly restrict the development and application of lithium–oxygen batteries. Finding out high-efficiency catalysts that can effectively facilitate a highly reversible formation/decomposition of lithium peroxide is still a crucial challenge in the field of Li–O 2 batteries. Herein, a soluble catalyst of 2,2'-Azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) diammonium salt (ABTS) that can promote highly reversible formation and decomposition of Li 2 O 2 during discharge and charge processes is reported for the first time. During discharge, it can capture and couple two LiO 2 intermediates via its sulfonate and ammonium ions, and induce the intramolecular disproportionation reaction to produce Li 2 O 2 through ionic microenvironment, which not only prompts the solution-phase growth of Li 2 O 2 , but also restricts the reactivity of LiO 2 intermediate, thus significantly alleviating the electrode surface passivation issue and suppressing the superoxide-related side reactions. During charge, it can quickly transport electrons between the electrode and Li 2 O 2 by serving as a new kind of redox mediator (RM), thus greatly facilitating the Li 2 O 2 oxidation kinetics. As a result, the Li–O 2 batteries that incorporate ABTS exhibit outstanding electrochemical performance, low charge overpotential, high discharge capacity, and high cycling stability.
研究领域:
能源化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2022
·
IF 24.319
Zhaomin Chen,Zhenyu Wu,Jia Xu,Rui Zhao,Xiaoxia Han,Jiwei Jiang,Mingwang Shao,Bin Dong,Zhenhui Kang
Photochemical devices show great potential in applications ranging from electrical energy storage to future smart grids. Here, we report a metal-free composite film cell based on carbon dots (CDots) and polyaniline (PANI), which could achieve 24/7 discharge and photo-charging in seawater. CDots/PANI film cell has an open-circuit-voltage (OCV) of 0.95 V, a maximum power density of 380 mW m 2 , and the ability to discharge continuously for 40 h under solar irradiation of AM 1.5 G. It couples the reduction reaction of PANI, and the CDot-catalyzed oxygen reduction reactions (ORR) during discharge. While the light-induced CDot-catalyzed oxygen evolution reaction (OER) and the reduction reaction of PANI during charging. In particular, in-situ TPV tests were used to verify the effect of the light-induced OER and the kinetic properties of the catalyst on the charge transfer at the interface. We believe this research may provide new ideas for sustainable energy conversion and storage.
研究领域:
材料科学
·
能源转换与存储
·
光化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2022
·Vol. 28
·期 68
·e202202004
·
IF 5.02
Conghui Zhao,Liwei Sun,Yang Xu,Beibei Dong,Yuhong Luo,Jingde Li,Jianxin Chen,Zisheng Zhang
Graphical Iodine-doped Bi 2 GdO 4 Cl with a significantly promoted visible-light-responsive O 2 -evolving performance of 154.8 μmol ⋅ h −1 and an apparent quantum efficiency of ∼1.1 % at 420 nm is reported. The incorporation of I − ions causes the extended light absorption and promoted charge separation. Visible-light-responsive bismuth-based oxyhalide has recently attracted extensive attention, however, the promotion of its charge separation is still challenging. Herein, we introduce iodine into Bi 2 GdO 4 Cl to synthetize I-doped Bi 2 GdO 4 Cl (denoted as yI−Bi 2 GdO 4 Cl, 0≤y≤2). The incorporation of I − ions is found to enhance light absorption and to accelerate charge separation by combining various characterizations such as density functional theory calculation, photoelectrochemical test, electrochemical impedance spectroscopy, photoluminescence spectrum, and open-circuit voltage decay. The O 2 -evolving performances of 1I−Bi 2 GdO 4 Cl with optimized dopant concentration of I − ion and IrO 2 loaded 1I−Bi 2 GdO 4 Cl are tremendously enhanced by ca. 4 and 45 times compared to pristine Bi 2 GdO 4 Cl. Notably, The O 2 evolution rate reaches as high as 154.8 μmol ⋅ h −1 with an apparent quantum efficiency of ∼1.1 % at 420 nm. The synthetic iodine-doped photocatalyst remains stable after long-term photoreaction, demonstrating its potential in the field of photocatalysis.
研究领域:
材料科学
·
光催化
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2022
·
IF 24.319
Weijie Yang,Kailong Sun,Jun Wan,Yang-Ai Ma,Jiaqing Liu,Bicheng Zhu,Lin Liu,Feng Fu
The insufficient generation of oxidative active species severely limits the activity of photocatalytic aerobic oxidation for organic pollutants degradation in wastewater. Herein, transition metal phosphides (TMPs) cocatalysts, including Ni 2 P, Co 2 P, and NiCoP, were loaded on Bi 4 O 5 Br 2 nanosheets by a simple liquid assembly method. Among which, 15% NiCoP/Bi 4 O 5 Br 2 heterojunction exhibits the optimal photocatalytic activity for degrading phenolic pollutants owing to the high concentration of h + and •O 2 − active species, and it displays excellent tolerance for the inorganic ions, pH value, water matrix, and outdoor sunlight. The S-scheme charge transfer mechanism was revealed for NiCoP/Bi 4 O 5 Br 2 heterojunction, which significantly improves the separation efficiency of photogenerated charge carriers and facilitates the accumulation of active h + . Furthermore, NiCoP with high reduction potential and outstanding O 2 activation ability is served as the active site for producing •O 2 − . This work can inspire the further design of bifunctional photocatalysts for efficient photocatalytic aerobic oxidation applications.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Sustainability
·
2023
·
IF 7.8
A. Shan,Y. Lu,L. Cheng,Z. Hou,D. Xili,Y. Li,J. Liu,H. Ma,J. Yang
Due to the high electronegativity , dissolved O 2 molecules can form strong chemisorption on oxygen-deficient nano-TiO 2 , which can alter the photocatalytic degradation process . Regarding this point, there is a lack of sufficient investigation so far, although there have been many reports on oxygen-deficient nano-TiO 2 . Here, we make the dissolved O 2 adsorbed on the oxygen-deficient nano-TiO 2 by simply stirring for a long time. The characterization and theoretical calculation results show that the chemisorption of O 2 significantly enhances the surface hydrogen bonding and results in a substantial increase in the co-adsorbed H 2 O molecules and –OH groups. The co-chemisorbed oxygen species promote the separation of electron-hole pairs, meanwhile accelerate the migration and accumulation of holes to the surface, which effectively enhances the direct oxidation of photogenerated holes. The findings of this work suggest that for long continuous reactions, the role of chemisorbed dissolved O 2 molecules on the photocatalytic degradation activity of oxygen-deficient nano-TiO 2 has to be considered.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Shuzhen Yu,Yongchun Hou,Qijie Jin,Liangliang Zhu,Su Chen
As global warming and greenhouse gas emissions intensify, the scientific community is continuingly seeking effective solutions. One promising strategy known as artificial photosynthesis is proposed utilizing H 2 O as a reducing agent to transfer CO 2 into fuel. However, low O 2 production and conversion efficiency have hindered this approach in matching with natural photosynthesis. In this work, we propose a novel biomimetic photocatalyst design approach to improve the catalytic efficiency by slow photon mechanism. Our design is mainly inspired by two factors: 1) Chlorophyll, an abundant natural photosynthetic pigment, can efficiently and selectively reduce carbon dioxide and plays a key role in photosynthesis; 2) The iridoplast with a biological photonic crystal structure can significantly improve the efficiency of photosynthesis. Specifically, we couple photonic crystals and photocatalyst of sodium copper chlorophyllin (ChlCu), and binder of PVA through microfluidic blowing-spinning (MBS) to spray a composite photocatalytic film that can convert carbon dioxide and water into carbon monoxide and oxygen. By optimizing the content of ChlCu and the slow photon effect related to the bandgap position, the final CLPPs 300 -0.52% has two slow photon edges overlapping with the catalyst absorption spectrum, thus generating the maximum photon capture capability and achieving a high oxygen catalytic yield of up to 7.8 mmol g -1 h −1 . The spraying property of this material enable it to be coated on the external surfaces of other materials. This opens new possibilities of photocatalytic fabric preparation for CO 2 converting, providing new ideas of greenhouse gas capture and utilization to solve environmental problems.
研究领域:
环境科学
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材料科学
·
光合作用研究
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Weixue Yang,Jiaqi Zhao,Zhen Li,Jiayu Xin,Fei Li,Yu Wang
Introducing light energy into the charging/discharging process is an effective strategy to reduce the overpotential of Li−O 2 battery, which leads that the battery has higher energy conversion efficiency and better battery performance. However, the development has been hampered by the lack of suitable photocatalysts and cathode structure to accommodate the insoluble Li 2 O 2 . In order to overcome the aforementioned difficulties, a bifunctional photocatalyst α-Fe 2 O 3 /SnO 2 (FS) heterojunction was designed as the cathode to improve the charging/discharging overpotentials simultaneously. The photogenerated electrons and holes from FS participated in the oxygen reduction reaction (ORR) and oxygen revolution reaction (OER) under illumination, giving rise to an ultra-low charging/discharging overpotential of 0.01 V (energy efficiency up to 99.7%), which improved the electrochemical reaction kinetics of the Li−O 2 battery strikingly. In addition, the FS cathode exhibited excellent cycle stability under light (the battery energy efficiency can still maintain 80% after 252 cycles). The bifunctional catalyst designed in this paper has profoundly proved that the band engineering strategy can effectively utilize solar energy and provide important insights for understanding the mechanism of photo-assisted Li−O 2 battery.
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
TRANSACTIONS OF TIANJIN UNIVERSITY
·
2025
·Vol. 31
·期 3
·278-291
·
IF 8.5
Chi Shuxiu,Wang Chenhui,Liao Jie,Sun Peng,Fei Yaohan,Han You,Zhang Jinli,Wu Jiangjiexing,Li Wei
Aiming at inhibiting the irreversible P2–O2 phase transition of conventional P2-type cathode materials at high voltage and enhancing the cycling stability of sodium-ion batteries, in this article, based on a strategy of adjusting the Na + ion occupancy within the crystal structure, Na 0.67 Ni 0.33 Mn 0.67– x Fe x O 2 (NM– x Fe, x = 0.10, 0.15, 0.20) cathode materials were synthesized by high shear mixer (HSM)-assisted co-precipitation method and evaluated the electrochemical performance at high voltage (4.35 V). The optimal sample NM–0.15Fe exhibits an initial discharge capacity of 130.8 mAh/g (0.1 C), with exceptional retention of 95.9% after 100 cycles (1 C). XRD analysis reveals that Fe intercalation promotes the more amount of Nae-similar occupation; the Nae/Naf ratio equals 1.93 for NM–0.15Fe versus 1.62 for NM, which enhances Na + diffusion kinetics, as confirmed by GITT tests. Through characterizations of in situ XRD, XPS, HRTEM, CV, etc., it is illustrated that the Fe 3+ intercalation can effectively disrupt the Na + /vacancy ordering and inhibit the harmful P2–O2 phase transition, and then improve the cycling stability of the cathode. DFT calculations disclose that intercalated Fe can reduce the electron densities of adjacent transition metallic elements, generating more repulsive forces impacted on sodium and consequently appearance of more Nae sites, leading to a lower Na + diffusion energy barrier. Such strategy of modulating Na occupation sites in crystal structure is conducive to the development of low-cost and high-performance layered cathode materials for sodium-ion batteries.
研究领域:
电化学储能
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材料科学
·
固态化学
·
能源材料
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电池技术
·
过渡金属氧化物
✓ 已验证
产品关联
DOI
高影响因子
Communications Chemistry
·
2025
·Vol. 8
·期 1
·389
·
IF 6.2
Han Lei,Tan Jingying,Zhang Yucui
Given the promising prospect of nanozymes in colorimetric test strips, it is essential to eliminate the interferences of their multi-activities and various colors on the test strip. Here, white Mn-based metal-organic frameworks (Mn-MOFs) with ultrathin 2D morphology (3 nm thick) were successfully synthesized by a simple ultrasonic approach. The origin of the white optical property in Mn-MOFs was systematically investigated, revealing that it stems from specific metal-ligand coordination polymerization rather than morphological features or defect states. Mn-MOF nanozymes possessed exclusive peroxidase-mimicking activity rather than oxidase-like activity, effectively resisting O 2 interference during colorimetric assay. Moreover, Mn-MOF nanozymes displayed unique substrate selectivity without additional modification. Unlike other colored nanozymes, the whiteness of Mn-MOF nanozymes enhanced the paper’s whiteness, boosting contrast for colorimetric detection on test strip. This study pioneers a systematic investigation into the origin of whiteness in MOF nanozymes. The coordination-defined properties enable interference-free optical design and O 2 -resistant on-site detection.
研究领域:
材料科学
·
纳米技术
·
分析化学
·
生物传感器
·
酶模拟
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2025
·Vol. 60
·期 48
·25148-25163
·
IF 3.9
Zhang Zhenyan,Chai Huan,Yu Zhengqian,Li Jinsheng,Li Pengfei,Wu Lei,Li Zhanshuai,Qi Xiwei
TiO 2 -based materials are widely used in high-temperature capacitors and aerospace electronics but face challenges such as high dielectric loss and limited thermal stability in conventional single-component systems. To address these issues, we propose a novel strategy integrating high-entropy doping design and oxygen vacancy engineering. In 2 O 3 -doped (GeMnTiSnMo)O 2 high-entropy ceramics (GMTSMO- x In, x = 0.1–1) were synthesized via solid-state reaction. Experimental results reveal that In 3+ doping generates high-density oxygen vacancies (V o ·· ) through charge compensation, forming [Ti 3+ - V o ·· -Ti 3+ ] and [Mn 3+ - V o ·· -Mn 3+ ] defect-dipole clusters. These clusters enhance electron localization and suppress carrier migration, reducing dielectric loss by threefold. Simultaneously, oxygen vacancy enrichment strengthens interfacial polarization, increasing the dielectric constant by fourfold. The optimal GMTSMO-0.5In exhibits a relative permittivity ( ε r ) of 4.0 × 10 6 and a low loss tangent of 15 at 650 ℃/100 Hz, outperforming traditional TiO 2 -based materials and existing high-entropy oxides. All compositions demonstrate excellent temperature stability (25–400 ℃) and frequency-independent behavior above 10 4 Hz. This work provides a high-entropy-driven approach for dynamic defect engineering, paving the way for advanced dielectric materials in extreme-condition energy storage systems.
研究领域:
材料科学
·
陶瓷与介电材料
·
电子材料
·
储能技术
·
缺陷化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMISTRY OF MATERIALS
·
2025
·
IF 7
Jiale Han,Guofan Wang,Xu Hu,Jinlin Li,Zhaojun Xie,Zhen Zhou
Rechargeable lithium oxygen (Li–O2) batteries are regarded as promising candidates for future energy storage systems due to their exceptionally high theoretical energy density. However, their practical implementation faces major obstacles, including high charge and discharge overpotentials and a semiopen battery structure that is highly sensitive to humidity. These factors lead to reduced efficiency and poor stability in moist air, significantly limiting real-world application. To address these challenges, a composite photoelectrode was developed by directly growing tungsten trioxide (WO3) nanoribbons on carbon paper (CP), followed by the uniform deposition of platinum nanoparticles using atomic layer deposition. Compared to WO3 photoelectrode, the resulting Pt–WO3 photoelectrode enables stable operation of photoassisted Li–O2 batteries under humid oxygen atmosphere. The batteries sustain stable operation for over 100 cycles without failure at current densities of 0.05 and 0.2 mA cm–2. Advanced characterization and theoretical calculations confirm the formation of an ohmic contact between platinum and tungsten trioxide, which promotes the separation of photogenerated electrons and holes, improves charge transfer, and facilitates the reversible formation and decomposition of lithium hydroxide (LiOH). This strategy effectively overcomes critical barriers faced by conventional Li–O2 batteries in real-world environments and provides a promising direction for the design of environmentally tolerant and photoelectrochemically efficient energy storage systems.
研究领域:
能源材料
·
电化学
·
纳米材料
·
光电化学系统
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2021
·
IF 10.588
Zhiwei Yang,Yiwen Luo,Jiapeng Yue,Xinyu Wang,Hao Xu,Qian Ye,Yujian Zhang,Xinyi Xing,Qingguo Wang,Jing Zhang
This study proposes a method to activate O 2 by accelerating the corrosion process for zero-valent zinc (ZVZ) with the assistance of Cu(II), promoting the consecutive production of reactive oxygen species . The mechanisms for reactive oxygen species generation are clarified with metronidazole (MTZ) as the targeted pollutant. The outcome suggests the association of Cu(Ⅱ) and ZVZ presents an apparent cooperative activity, an enhancement of 85% in MTZ removal is attained for the ZVZ/Cu(Ⅱ) system after 10 min compared to that for ZVZ. Analysis of the mechanisms involved indicates that this improvement is due to the addition of Cu(Ⅱ), which can accelerate the corrosion of ZVZ. In addition, quenching experiments and electron paramagnetic resonance (EPR) technology show that superoxide radicals (·O 2 − ) result in rapid MTZ degradation. The primary component that is liable for O 2 activation and a certain amount of H 2 O 2 generation is verified to be ZVZ. Moreover, Cu(I) is detected in the ZVZ/Cu(Ⅱ) system, which arises from a direct reduction pathway driven by ZVZ and an indirect reduction pathway driven by active hydrogen atoms .
研究领域:
环境科学
·
化学工程
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）