Frontiers of Materials Science
·
2023
·Vol. 17
·期 2
·1-11
·
IF 2.7
Xiao He,Xue Shoufeng,Fu Zimei,Zhao Man,Zhang Li,Zhang Junming,Wu Haishun,Jia Jianfeng,Yang Nianjun
Developing high-activity and low-cost catalysts is the key to eliminate the limitation of sluggish anodic oxygen evolution reaction (OER) during electrocatalytic overall water splitting. Herein, Ni–Fe/black phosphorous (BP) composites are synthesized using a simple three-electrode system, where exfoliation of bulky BP and synthesis of NiFe composites are simultaneously achieved. Under light illumination, the optimized Ni–Fe/BP composite exhibits excellent photoelectrocatalytic OER performance (e.g., the overpotential is 58 mV lower than a commercial RuO 2 electrocatalyst at a current density of 10 mA·cm −2 ). The electron transfer on this composite is proved to follow a Ni–BP–Fe pathway. The electronic structure of this Ni–Fe/BP composite is effectively regulated, leading to optimized adsorption strength of the intermediate OH* and improved intrinsic activity for the OER. Together with active sites on the support, this Ni–Fe/BP composite possesses abundant electrochemical active sites and a bug surface area for the OER. The introduction of light further accelerates the electrocatalytic OER. This work provides a novel and facile method to synthesize high-performance metal/BP composites as well as the approaches to reveal their OER mechanisms.
研究领域:
电化学
·
催化
·
材料科学
·
纳米技术
·
能量转换
✓ 已验证
DOI
高影响因子
ACS Nano
·
2025
·
IF 16
Hualong Wu,Jiahao Dong,Jiantao Li,Guiyang Gao,Liang Lin,Ailin Liu,Hongfei Zheng,Guanyi Wang,Junxiang Liu,Laisen Wang,Jie Lin,Khalil Amine,Dong-Liang Peng,Qingshui Xie,Jun Lu
Low initial Coulombic efficiency and severe capacity/voltage fading during cycling caused by serious irreversible oxygen release, especially in the initial cycle, and resultantly induced unstable electrode/electrolyte interfacial chemistry, largely prohibit the commercial application of high-capacity Li-rich layered oxide cathodes (LLOs). In this work, a dual reductive gas interface cotreatment strategy is applied to regulate the lattice oxygen redox activity and reversibility with a multiple defective structure design including Li/O/TM (TM = transition metal) vacancies and the intrinsic TM doping as well as a full-surface protective layer, which can suppress the irreversible TM migration and then undesirable phase transformation, resisting the corrosion of electrolyte during cycling effectively. Importantly, the introduced reversible SO32–/SO42– redox couple that provides extra capacity compensation could alleviate the distortion of oxygen-central octahedral structure and structural collapse caused by immoderate oxygen oxidation. Thus, the lattice oxygen redox chemistry is optimized, with negligible oxygen loss during the initial cycle. And the designed AS-LLO cathode with greatly enhanced structure stability shows high-capacity retentions of 99.2% at 0.3C after 100 cycles and 82.4% even after 1000 cycles at 5C. This work provides a guideline for manipulating the oxygen redox chemistry to achieve long-lifespan Li-rich layered oxide cathodes for high-energy-density lithium batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Wenjing Zhao,Peng Wang,Fan Zhang,Yinshen Liu,Xuan Jin,Shijun Yuan,Qi Fan,Xing Guo,Qingyu Xu
Cation-disordered rock-salt cathodes have attracted extensive attention due to their high capacity and energy density . However, the excessive redox reaction of O 2- causes a severe impairment of Ni capacity and the release of O 2 , leading to the poor cycle stability and voltage decay for Li-Ni-Nb-O cathodes. In our work, the oxyfluoride compounds Li 1.23 Ni 0.3 Nb x Fe y O 2- z F z with various doping concentrations of Fe and F are successfully synthesized by solid state reaction using high-energy ball milling. Apart from observing the plateau at around 4 V with the redox reaction of Ni, a new plateau at approximately 2.6 V is observed due to the redox reaction of Fe. The doping of Fe on Nb increases the discharge capability and the co-doping of F on O further improves cycle stability. With the optimized doping amount of Fe ( y = 0.16) and F ( z = 0.15), Li 1.23 Ni 0.3 Nb 0.30 Fe 0.16 O 0.85 F 0.15 can deliver a discharge capacity of 347.1 mAh/g at a current density of 20 mA/g after the activation process in subsequent cycles. After 20 cycles at 20 mA/g, the capacity retention is 181.6 mAh/g, and after 100 cycles at 50 mA/g, the discharge capacity remains 102.2 mAh/g.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
Molecular Catalysis
·
2024
·
IF 3.9
Ke-Xin Li,Yongfang Jin,Weimin Huang,Decun Luo,Tao Zhang,Xiaolong Han,Yuanhao Wang,Ralph T. Yang,Zhun Hu
CeO 2 with varied doping transition metal was investigated to understand the oxygen storage capacity and oxygen release property of CeO 2 -based catalysts for toluene combustion. The order of catalytic activity was as follows: CuCeO x ≈ CoCeO x > MnCeO x > FeCeO x > NiCeO x > ZrCeO x > CeO 2 . Kinetic studies showed that the reaction on CuCeO x proceed via an MvK mechanism and the oxygen of catalyst was crucial factor for the toluene combustion. H 2 -TPR and XPS showed the addition of transition metal to CeO 2 could modify the surface lattice oxygen. Moreover, the oxygen storage capacity and oxygen release properties showed the transition metal additive not only change the amount of oxygen, but also affect the oxygen mobility. A linear relationship was observed between the catalytic activity and oxygen storage capacity. Diffuse reflectance infrared fourier transform spectroscopy showed the toluene first adsorbed on the surface of catalyst, and then reacted with oxygen of catalyst to form benzyl, benzoate and benzyl carbonate species. All these results provided a new strategy to develop high performance catalyst.
研究领域:
催化化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Weibin Guo,Yunfan Wu,Shihao Wang,Yuanyuan Liu,Guiyang Gao,Liang Lin,Mengjian Fan,Xutao Zhu,Li Xia,Qing Luo,Laisen Wang,Ji Shi,Jie Lin,Qingshui Xie,Dong-Liang Peng
The instability of the anionic redox reaction and the resulting irreversible oxygen release are the core causes of the deterioration of the cycling stability of Li-rich cathode materials (LRM). The effective method is to establish a surface coating on the LRM, which is equivalent to converting surface oxygen on the LRM into bulk oxygen. However, developing a coating that can form a solid binding with the surface oxygen of the LRM remains challenging. To solve the above challenge, a uniform surface boron cobalt complexes (BCCs) coating was constructed on cobalt-free LRM. The constructed BCCs coating can significantly mitigate the interface side reaction, Mn dissolution, and irreversible gas release, and enhance structural stability. The cycling stability shows that the modified LRM cathode exhibits superior capacity retention (92.7 %) compared to that of the pristine LRM cathode (78.1 %) after 300 cycles at 1 C. This modification strategy heralds a useful paradigm for optimizing the cycling stability of LRM to promote their commercial application.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Xiaojian Fan,Qianwan Qin,Dongming Liu,Aichun Dou,Mingru Su,Yunjian Liu,Jun Pan
In this reported study, Li 3 NbO 4 -based, Li-excess cathode materials xLi 3 NbO 4 •(1-x)LiMnO 2 (0.2 ≤ x ≤ 0.5) were synthesized using a solid state reaction method. XRD results showed that the fabricated powders with x = 0.3–0.5 could be indexed to a typical rock-salt structure (Fm-3m space group). Rietveld refinements showed that the lattice parameters increased with the increase in Nb 5+ content. SEM and TEM images of the product showed that the elements Nb, Mn and O were evenly distributed in the samples, which further confirmed the cubic rock-salt structure of the product. Electrochemical tests of the samples showed that the sample with x = 0.4 exhibited the best electrochemical performance (232 mAh/g in the first cycle and more than 175 mAh/g in 50 cycles, as well as relatively high discharge capacity at high discharge current density). The redox mechanism analysis of the experimental results indicated that there were two stages in charge process: one was the Mn 3+/4+ oxidation reaction below 4.3 V, and the other was related to the oxidation of O 2− to O − or the release of O 2 , which improved the reversible capacity of the material. The structural evolution analysis of the samples showed that a spinel phase structure was present during the cycling process and the shift in the XRD peaks indicated that the sample with x = 0.4 exhibited the best structural stability. The electrochemical impedance spectroscopy analysis showed that the sample with x = 0.4 had the smallest R ct . The results for the kinetics of lithium ion diffusion indicated that the sample with x = 0.4 had largest D Li +, which was consistent with the best electrochemical performance for this material, especially the rate capability.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
DALTON TRANSACTIONS
·
2016
·Vol. 45
·期 9
·3814-3819
·
IF 4.177
L. L. Zhang,Y. Gao,Z. Liu,X. Ding,Z. Yu,L. C. Sun
A trinuclear ruthenium complex, 3, was designed and synthesized with the ligand 2,2′-bipyridine-6,6′-dicarboxylic acid (bda) and we found that this complex could function as a highly efficient molecular catalyst for water oxidation in homogeneous systems. This trinuclear molecular water oxidation catalyst, 3, displayed much higher efficiencies in terms of turnover numbers and initial oxygen evolution rate than its counterparts, a binuclear catalyst, 2, and a mononuclear catalyst, 1, in both chemically driven and photochemically driven water oxidation based on either the whole catalytic molecules or just the active Ru centers. The reasons for the superior performance of catalyst 3 were discussed and we believe that multiple Ru centers in a single molecule are indeed beneficial for increasing the probability of the formation of O–O bonds through an intramolecular radical coupling pathway.
研究领域:
化学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2014
·
IF 4.058
Ting Zhang,Yaobin Ding,Heqing Tang
An efficient singlet oxygen generation system was first developed by using Bi(V)/Bi(III) composites for degrading organic pollutants . The composites were prepared by hydrolyzing NaBiO 3 in HCl solutions. As monitored by various techniques, it was found that the morphology and composition of the composites were able to be tuned by changing the molar ratio of HCl to NaBiO 3 in the preparation process, which was optimized at 2.0. Due to the efficient generation of singlet oxygen, the use of the composite (0.75 g L −1 ) resulted in almost complete degradation of bisphenol A (0.2 mmol L −1 ) in 20 min, with a pseudo-first-order kinetic constant of 0.14 min −1 . The dominant reactive species in the degradation system were confirmed to be singlet oxygen, which was generated from the release of the lattice oxygen in the composite. The good performances of the concerned singlet oxygen generation system are general for degrading different organic pollutants.
研究领域:
环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Peiying Ma,Zhou Wang,Yibei Jiang,Zongwang Huang,Lu Xia,Jinlong Jiang,Fulai Yuan,Hui Xia,Yi Zhang
Loading hydrogels with ozone for antibacterial activity is an important research topic for expanding clinical applications. In particular, hydrogel network constructs and storage and controlled release of massive ozone amounts are research emphases. In this paper, a nanoclay crosslinked nanocomposite hydrogel with a bionic three-dimensional porous network structure formed by two-dimensional lamellar montmorillonite was incorporated into polyacrylamide through a crosslinking reaction, which provided enhanced mechanical properties and abundant ozone adsorption sites. The clay-based nanocomposite hydrogel had the enlarged pore structure (11.7 µm) and a stable Young's modulus (75.82 GPa), which also provided a guarantee for the highly ozone adsorption capacity. The nanocomposite exhibited timely bactericidal and long-term antibacterial effects on Staphylococcus aureus , which provides ideas for the development and application of inexpensive clay minerals in the biomedical antibacterial field.
研究领域:
材料科学
·
生物医学工程
·
微生物学
✓ 已验证
产品关联
DOI
高影响因子
BIOMACROMOLECULES
·
2025
·
IF 5.4
Min Ru,Renyan Huang,Lu Wang,Zuwei Luo,Ying Huang,Renchuan You,Ruoxuan Peng,Shuqin Yan,Qiang Zhang,Shengjie Ling,Weilin Xu
In response to the difficulties posed by anaerobic bacterial infections in wound healing, particularly in light of the increasing prevalence of antibiotic-resistant strains and the complex nature of wound environments, this study introduces a meticulously planned oxygen-generating tissue engineering scaffold to address these obstacles. This scaffold is realized from silk fibroin (SF), poly(vinyl alcohol) (PVA), and calcium peroxide (CPO) by ice crystal-induced self-assembly combined with the ice template method, aiming at a synergistic balance of hydrophilicity, structural stability, mechanocompatibility with biological tissues, controllable oxygen-releasing behavior, and antianaerobic bacterial properties. In particular, the oxygen-generating scaffold containing 2.5% CPO exhibits excellent antianaerobic properties by destroying C. perfringens through a mechanism that disrupts bacterial cell membranes and DNA, as well as promotes the generation of reactive oxygen species. Meanwhile, significant cytotoxic or hemolytic effects were avoided. Subsequent results demonstrated that the oxygen-generating scaffold accelerated the healing process of C. perfringens-infected wounds with results similar to those of amoxicillin. These results emphasize the promise of this new platform in clinical practice for the treatment of anaerobic bacterial infections and establishing a basis for advanced therapeutic strategies.
研究领域:
生物材料
·
组织工程
·
感染生物学
·
伤口修复
·
抗菌治疗
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Energy Chemistry
·
2024
·
IF 14
Bin He,Yujie Dai,Shuai Jiang,Dawei Chen,Xilong Wang,Jie Song,Dan Xiao,Qian Zhao,Yan Meng,Wei Feng
Oxygen release and electrolyte decomposition under high voltage endlessly exacerbate interfacial ramifications and structural degradation of high energy-density Li-rich layered oxide (LLO), leading to voltage and capacity fading. Herein, the dual-strategy of Cr x B complex coating and local gradient doping is simultaneously achieved on LLO surface by a one-step wet chemical reaction at room temperature. Density functional theory (DFT) calculations prove that stable B–O and Cr–O bonds through the local gradient doping can significantly reduce the high-energy O 2 p states of interfacial lattice O, which is also effective for the near-surface lattice O, thus greatly stabilizing the LLO surface. Besides, differential electrochemical mass spectrometry (DEMS) indicates that the Cr x B complex coating can adequately inhibit oxygen release and prevents the migration or dissolution of transition metal ions, including allowing speedy Li + migration. The voltage and capacity fading of the modified cathode (LLO-CrB) are adequately suppressed, which are benefited from the uniformly dense cathode electrolyte interface (CEI) composed of balanced organic/inorganic composition. Therefore, the specific capacity of LLO-CrB after 200 cycles at 1C is 209.3 mA h g −1 (with a retention rate of 95.1%). This dual-strategy through a one-step wet chemical reaction is expected to be applied in the design and development of other anionic redox cathode materials.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Jian Fan,Chunyan Cao,Lan Shang,Liangjie Yuan
High-nickel layered oxide LiNi 0.9 Co 0.1 O 2 is a promising cathode material for lithium-ion batteries due to its high specific capacity and low cost. However, the internal stress generated during deep delithiation can cause microcracks, giving rise to rapid capacity decay and deteriorated thermal stability. In this work, Mg and Al ions are incorporated into the bulk phase of LiNi 0.9 Co 0.1 O 2 via high-temperature solid-state reaction. We demonstrate that Al 3+ doping enhances charge transfer between transition metal (TM) and oxygen layers, strengthening TM-O bonds and stabilizing the structure, thereby alleviating structural distortions under deep delithiation. More impressively, Mg 2+ doping significantly improves structural stability through a pillaring effect, effectively suppressing irreversible phase transitions during charge-discharge cycling. Consequently, Mg-Al co-doping optimizes the overall structural integrity of the high-nickel cathode, enhances its stability, and inhibits lattice oxygen release during long-term cycling. The Mg-Al co-doped LiNi 0.9 Co 0.1 O 2 delivers a remarkable capacity of 177.3 mAh g −1 after 100 cycles with capacity retention of 93.5 %, demonstrating outstanding cyclability. This Mg-Al co-doping strategy provides a simple and practical approach to enhance the electrochemical performance of high-nickel layered cathode materials.
研究领域:
材料科学
·
电化学
·
锂离子电池
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）