APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Jing Li,Mingkun Wu,Rui Tu,Jiacheng Li,Keliang Wang,Ju Guo,Yi Xie
The limited narrow spectral absorption and rapid recombination of photogenerated carriers in photocatalytic materials result in inefficient molecular oxygen activation and insufficient generation of reactive oxygen species (ROS), severely restricting the degradation efficiency of organic pollutants. Herein, a composite catalyst with broad visible-light responsiveness was fabricated via a facile solvothermal and room-temperature stirring strategy, where sheet-like Bi 4 O 5 Br 2 was encapsulated with W 18 O 49 nanowires. The as-prepared catalyst exhibited high concentrations of h + and O 2 − active species, achieving a 92 % degradation rate of ciprofloxacin (20 mg/L) within 60 min, alongside exceptional environmental tolerance and stability. Experimental and computational investigations confirmed the S-scheme charge transfer mechanism, which enhances carrier separation while preserving electrons and holes with strong redox capabilities. The localized surface plasmon resonance (LSPR) effect of W 18 O 49 synergistically promoted hot electrons and photogenerated electrons to activate O 2 , generating abundant O 2 − . This work proposes a novel design paradigm for efficient and stable visible-light photocatalysts, advancing solutions to emerging antibiotic pollutants in aquatic systems.
研究领域:
环境科学
·
材料科学
·
光催化
·
纳米技术
·
化学工程
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产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2021
·
IF 19.503
Qian Zhang,Yuanyu Shi,Xianjin Shi,Tingting Huang,Shuncheng Lee,Yu Huang,Jun-ji Cao
Photo-oxidative NO x removal often encountered with sluggish charge carrier separation kinetics and poor selectivity. Herein, Pd/ferroelectric Bi 4 Ti 3 O 12 nanoflakes (Pd/BTO NF) were constructed to investigate the photo-excited charge separation, O 2 activation and the generated reactive oxygen species (ROS) in dictating NO removal. Results showed that the depolarization field of ferroelectric BTO NF significantly promoted bulk charge separation, leading to boosted NO removal reaction kinetics (10 times higher) for Pd/BTO NF comparing with Pd/TiO 2 . Revealed by electronic paramagnetic resonance and radical scavenging tests, it is observed that the primary O 2 activation species differed among Pd, Ag and Pt supported BTO NF photocatalysts, which resulted in different selectivity. The underlying mechanism of NO photo-oxidative conversion pathway was studied by in situ diffuse reflectance infrared Fourier transform spectroscopy. This work illustrate that metal/ferroelectric interfaces can be tuned to obtain differing O 2 activation species, and notable selectivity changes in photocatalysis mediated environmental remediation reactions.
研究领域:
环境科学
·
材料科学
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DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2025
·
IF 21.1
Zichen Song,Xinxin Zhang,Jianqiu Zhu,Xiaolei Wang,Wenqian Wang,Xiangbo Ma,Jiantao Fu,Jian-Qiang Wang,Guiling Wang,Zhiyu Ren,Honggang Fu
While copper complexes intrinsically provide Cu sites for electrocatalytic CO 2 reduction (ECR), their efficacy toward multicarbon products (C 2+ ) remains fundamentally limited by the operational instability of reactive Cu valence states and the inability to synchronously optimize *CO intermediate generation and C-C coupling within symmetric coordination environments. Herein, we judiciously design a single-crystal N, O co-coordinated copper complex (Cu(ICA) 2 ) featuring asymmetric N 2 -Cu-O 2 centers that precisely modulate the electronic structure and local adsorption environment. The Cu-N bonds stabilize partially reduced Cu δ⁺ sites while weakening Cu-O interactions, thus balancing structural integrity with catalytic reactivity. This asymmetric dual-site coordination concurrently hosts distinct *CO intermediates (atop-adsorbed *CO at Cu sites and bridge-adsorbed *CO at Cu-N sites), enabling cooperative C-C coupling into C 2 products. The catalyst achieves a record 69.2 % Faradaic efficiency for C 2 products at 400 mA cm −2 and 57.4 % for C 2 H 4 at 500 mA cm −2 in 1.0 M KOH, rivaling the state-of-the-art Cu-based complexes. In situ characterization and DFT calculations mechanistically corroborate that bridge-adsorbed *CO at Cu-N sites drives energetically favorable hydrogenation and C-C coupling pathways. This work establishes a coordination-asymmetry design principle for constructing robust molecular catalysts capable of efficient CO 2 -to-C 2+ conversion.
研究领域:
电化学
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催化化学
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分子设计
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能源材料
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环境化学
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物理化学
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产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2025
·
IF 21.1
Zhen Wang,Lei Ying,Weibin Xu,Beien Zhu,Chuande Huang,Pengfei Wu,Qingqing Gu,Bing Yang,Jian Lin,Yi Gao,Xiaodong Wang,Tao Zhang
Tuning metal size from nanoscale to uniform single atoms holds the potential to promote the oxygenates selectivity for direct methane conversion, but suffers from low kinetics when utilizing O 2 as oxidant. Herein, we report a Au nano -Fe 1 -ZSM-5 catalyst for enhanced acetic acid production from CH 4 , CO, and O 2 in aqueous solution. The Au nano nanoparticles enable upgrading of O 2 into active hydroxyl radicals (•OH) via net reaction between O 2 , H 2 O and CO. The Fe 1 single atoms within 5-nm range from Au nano could be converted into active Fe 1 IV -O by •OH oxidation, which catalyzes rapid H-abstraction from CH 4 and subsequent C-C coupling with CO for acetic acid production. Such closely adjacent but separate active centers, i.e., Au nano and Fe 1 for decoupled O 2 and CH 4 activation, respectively, enable a high reactivity of 982 mmol/g metal /h for methane conversion with O 2 oxidant while retaining a high acetic acid selectivity of 81 % at 150 °C.
研究领域:
催化化学
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能源化学
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环境科学
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产品关联
DOI
高影响因子
ADVANCED MATERIALS
·
2025
·
IF 26.8
Ting Wang,Zhenyu Xing,Mao Wang,Chao He,Tian Ma,Yi Wang,Xiaolin Wang,Hao Wu,Shuang Li,Chong Cheng,Changsheng Zhao
Producing high-purity oxygen (O 2 ) has a wide range of applications across diverse sectors, such as medicine, tunnel construction, the chemical industry, and fermentation. However, current O 2 production methods are burdened by complexity, heavy equipment, high energy consumption, and limited adaptability to harsh environments. Here, to address this grand challenge, the de novo design of Ru-doped metal hydroxide is proposed to serve as bioinspired O 2 -evolution catalysts with proton-coupled electron transfer (PCET) pathway for low-energy, environmentally friendly, cost-effective, and portable O 2 generation. The comprehensive studies confirm that the lattice H species in Ru-Co(OH) x -based O 2 -evolution catalyst can trigger a PCET pathway to optimize Ru-oxygen intermediates interactions, thus ultimately reducing reaction energy barriers and improving the activities and durabilities. Consequently, the prepared Ru-Co(OH) x -loaded membrane catalysts exhibit rapid and long-term stable O 2 production capabilities. Furthermore, the proposed material design strategy of lattice H-species shows remarkable universality and adaptability to broad Ru-doped metal hydroxides. This efficient, portable, and cost-effective O 2 generation technique is suggested to ensure an uninterrupted O 2 supply during emergencies and in regions with limited O 2 availability or air pollution, thus offering significant societal benefits in broad applications.
研究领域:
材料科学
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催化化学
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环境科学
·
生物医学工程
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产品关联
DOI
PubMed
高影响因子
Inorganics
·
2025
·Vol. 13
·期 8
·261
·
IF 3
Zebin Song,Hao Zhou,Yin Zhang,Haining Ji,Liping Wang,Xiaobin Niu,Jian Gao
The O3-type layered oxide materials have the advantage of high specific capacity, which makes them more competitive in the practical application of cathode materials for sodium-ion batteries (SIBs). However, the existing reported O3-type layered oxide materials still have a complex irreversible phase transition phenomenon, and the cycle life of batteries needs, with these materials, to be further improved to meet the requirements. Herein, we performed structural characterization and electrochemical performance tests on O3-NaNi0.6−xFe0.25Mn0.15MgxO2(x = 0, 0.025, 0.05, and 0.075, denoted as NFM, NFM-2.5Mg, NFM-5.0Mg, and NFM-7.5Mg). The optimized NFM-2.5Mg has the largest sodium layer spacing, which can effectively enhance the transmission rate of sodium ions. Therefore, the reversible specific capacity can reach approximately 148.1 mAh g−1at 0.2C, and it can even achieve a capacity retention of 85.4% after 100 cycles at 1C, demonstrating excellent cycle stability. Moreover, at a low temperature of 0 °C, it also can keep capacity retention of 86.6% after 150 cycles at 1C. This study provides a view on the cycling performance improvement of sodium-ion layered oxide cathodes with a high theoretical specific capacity.
研究领域:
材料科学
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电化学
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储能技术
·
无机化学
✓ 已验证
产品关联
DOI
高影响因子
Nano Energy
·
2021
·
IF 17.881
Dewang Li,Xiuyao Lang,Yong Guo,Yiqiao Wang,Yanyin Wang,Hucheng Shi,Shichao Wu,Weichao Wang,Quan-Hong Yang
Li-O 2 batteries are one of the most promising next generation batteries due to their high energy density . However, they suffer from high charge overpotentials and severe side reactions. Here we report a bifunctional CeVO 4 catalyst that not only lowers the charge potential by a photo-assisted mechanism, more importantly, promotes the efficient conversion of highly reactive oxidative intermediates to Li 2 O 2 , thus avoiding the oxidative decomposition of the electrolyte/cathode during discharge. Benefiting from its efficient electrocatalysis and the improved charging ability, 1.6x higher discharge capacity up to 6.14 mAh cm -2 , low charge potential of 3.48 V and stable cycling performance are simultaneously achieved. Theoretical calculation and in-situ Raman spectra confirm the superior adsorptive and conversion ability of superoxide species by electrochemical reduction and chemical disproportionation reactions on the CeVO 4 catalyst. These results indicate an effective strategy to break through the reported limitations of photo-assisted cathodes that are of a low electrocatalysis ability and limited discharge capacity. The significance of retaining a high energy density in photo-assisted Li-O 2 batteries is highlighted.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2020
·
IF 7.632
Xiujing Lin,Tingting Zhang,Chengcheng Chu,Zhuang Li,Ruiqing Liu,Pan Li,Yi Li,Zhendong Huang,Yanwen Ma
Lithium–oxygen (Li–O2) batteries, profiting by their super high theoretical energy density and oxygen-breathing electrodes, have attracted extensive concern. The synthesis of the electrode materials with high conductivity and promising cycling durability will be a critical aspect for Li–O2 batteries. In this article, a hybrid composite of CoS2 nanocages derived from ZIF-67 and interconnected by carbon nanotubes (CoS2/CNTs) is prepared and used in the air electrode fabrication for Li–O2 batteries. A reversible capacity of 2398.9 mAh g–1 is obtained, equivalent to 90% of the discharge capacity. When restricting the cycling capacity to 500 mAh g–1, the battery exhibits cycling stability for 52 cycles, with the cutoff potential keeping above 2.0 V. The key point of this material is the formation of porous CoS2 nanocages and insertion of the nanocages with CNTs, forming interconnected electrically conducting networks. The incorporation of CNTs serves as channels for fast electron transfer, which overcomes the poor conductivity of CoS2. Furthermore, the porous CoS2 nanocages could provide affluent active sites for an oxygen reduction reaction (ORR) and oxygen evolution reaction (OER), which also facilitates the diffusion of O2 and the infiltration of electrolytes. The combination of highly conductive CNTs and CoS2 with efficient catalytic activity renders improvement in the battery performance.
研究领域:
材料科学
·
储能
·
电化学
·
纳米材料
·
电池技术
✓ 已验证
DOI
高影响因子
ACTA PHYSICO-CHIMICA SINICA
·
2014
·Vol. 30
·期 9
·1667-1673
·
IF 0.886
XUE Qing-Rui,LI Jian-Ling,XU Guo-Feng,HOU Peng-Fei,YAN Gang,DAI Yu,WANG Xin-Dong,GAO Fei
A lithium-rich solid-solution layered cathode material, Li[Li0.2Mn0.54Ni0.13Co0.13]O2, was synthesized using a fast co-precipitation method, and surface modified withAg/C via chemical deposition. The electrochemical properties,
structures, and morphologies of the prepared samples were investigated using X-ray powder diffraction (XRD), field-emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), galvanostatic charge-discharge cycling, cyclic voltammetry (CV), electrochemical impedance
spectra (EIS), and energy dispersive X-ray spectroscopy (EDS). The XRD results showed that the pristine and Ag/Ccoated cathode materials both have hexagonal α-NaFeO2 layered structures with the R3m
space group. Microscopic morphological observations and EDS elemental mapping showed that a uniform Ag/C coating layer of thickness 25 nm was deposited on the surfaces of Li[Li0.2Mn0.54Ni0.13Co0.13]O2 particles. The Ag/C-coated Li[Li0.2Mn0.54Ni0.13Co0.13]O2
material gave an excellent electrochemical performance. The initial discharge capacity (0.05C) of the Ag/C- coated sample was 272.4 mAh ·g-1, with an initial coulombic efficiency of 77.4%, corresponding to 242.6 mAh·g-1 for the pristine sample, with an initial
coulombic efficiency of 67.6%, in the potential range 2.0-4.8 V (vs Li/Li+). After 30 cycles (0.2C), the Ag/C-coated Li[Li0.2Mn0.54Ni0.13Co0.13]O2 retained a capacity of 222.6 mAh·g-1, which was 14.45%
higher than that of Li[Li0.2Mn0.54Ni0.13Co0.13]O2. We also found that the Ag/C coating improved the rate capability of the solid-solution material Li[Li0.2Mn0.54Ni0.13Co0.13]O2. The
capacity retention (1C) of the Ag/C-coated sample was 81.3%, compared with the capacity at 0.05C. CV and EIS results showed that the Ag/C coating layer suppressed the oxygen release in the initial charge progress and lowered the surface film resistance and electrochemical reaction resistance
of the pristine sample.
研究领域:
材料科学
·
电化学
·
储能
·
锂离子电池
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2015
·
IF 4.504
Chaolumen Wu,Haibin Wang,Chenbo Liao,Jun Yang,Lei Li
A hybrid air-electrode composed of a mixture of fluorinated carbon (CF x ) and Ketjen black (KB) active carbon composite materials was prepared to improve performance of Li-O 2 battery . In the hybrid air-electrodes, four kinds of CF x materials including fluorinated graphite, fluorinated carbon fiber, fluorinated coke and fluorinated black carbon were utilized as lithium insertion materials. The physical properties and morphologies of the KB and CF x carbon materials were characterized by Brunauer-Emmett-Teller (BET), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and Scanning electron microscopy (SEM) measurements. Compared with the conventional KB air-electrode, all the CF x /KB hybrid air-electrodes in Li-O 2 batteries showed higher specific discharge capacity, especially at high current density . Among these CF x /KB hybrid air-electrodes, the fluorinated graphite based electrode showed the best electrochemical performance in Li-O 2 battery due to its highest discharge capacity of the fluorinated graphite material in the Li/CF x primary battery, highest specific surface area, and highest total pore volume . The electrochemical performance of Li-O 2 and Li-air batteries using the hybrid air-electrodes with the different fluorinated graphite: KB weight ratio, including specific charge and discharge capacity, cycling stability and rate capability were systematically investigated. At a current density of 0.5 mA cm −2 , the fluorinated graphite based air-electrode delivered a high specific discharge capacity of 1138 mAh g −1 in Li-O 2 batteries, which was more than four times than that of the conventional KB air-electrode (265 mAh g −1 ) under same testing conditions. The battery assembled with the fluorinated graphite based air-electrode exhibited better cycling stability than that of the battery assembled with the conventional KB air-electrode.
研究领域:
电化学
·
能源材料
·
纳米材料
·
电池技术
·
材料科学
✓ 已验证
DOI
高影响因子
ADVANCED MATERIALS
·
2012
·Vol. 24
·期 38
·5205-5211
·
IF 13.877
Fang Yang,Sunling Hu,Yu Zhang,Xiaowei Cai,Yan Huang,Feng Wang,Song Wen,Gaojun Teng,Ning Gu
Graphical It is found that Prussian Blue nanoparticles (PBNPs) possess a catalase-like activity to catalyse the breakdown of H 2 O 2 into oxygen (O 2 ) molecules under the neutral conditions (pH = 7.4). Based on this finding, we have developed a new strategy in which PBNPs can be excellent ultrasound (US) and magnetic-resonance (MR) dual modality imaging contrast agents for H 2 O 2 diagnostics in vitro and in vivo.
✓ 已验证
DOI
高影响因子
FUEL PROCESSING TECHNOLOGY
·
2017
·
IF 3.752
Ting Lu,Yucui Hou,Weize Wu,Muge Niu,Yupeng Wang
Direct conversion of raw biomass to fine chemicals is of significant conceptual and practical interest. Up to now, the direct conversion of raw biomass to fine chemicals is still a big challenge. The oxidation of biomass to formic acid (FA) and acetic acid (AA) is a promising industrial process in the future. In this work, we reported that a binary catalyst system of Keggin-type heteropoly acid H 5 PV 2 Mo 10 O 40 + H 2 SO 4 was efficient to directly convert corn cob , a highly abundant renewable agricultural waste, to FA and AA using O 2 as the oxidant in aqueous solutions. The effects of catalyst amount, H 2 SO 4 concentration, reaction temperature, reaction time and initial O 2 pressure on the conversions of corn cob were investigated. Under optimized reaction conditions, corn cob was transformed with a FA yield of 42.5% and an AA yield of 9.1% (based on carbon) after 30 min of reaction at 170 °C. In the oxidation, the pH of the aqueous solution plays a key role. The influences of pH on solid degradation, reaction pathway and oxidation of the components of corn cob were discussed. Hemicellulose is oxidized rapidly followed by partly oxidation of lignin, and cellulose is the most difficult converted part. Products FA and AA mainly come from polysaccharides (hemicellulose and cellulose) and pH has a major influence on cellulose. The recycling of the catalyst system is demonstrated and shows good reusability .
研究领域:
生物化学
·
可再生资源利用
✓ 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）