Catalysts
·
2022
·Vol. 12
·期 10
·1278
·
IF 4.501
Ying Wang,Huilin Xie,Kunming Liu,Jinhui Li,Jin-Biao Liu
Herein, we report a copper-catalyzed C-O cross-coupling of N-methoxy amides and arylboronic acids for the synthesis of aryl-N-methoxy arylimides. The fully selective O-arylation of the N-methoxy amides is found to be greatly prompted by the inexpensive and commercially available CuI. The reaction conditions tolerate a variety of functional groups and promote different reactivities depending on the electronic and steric properties of the distorted substrates.Keywords:copper catalyzed;N-methoxy amides;selective C-O cross-coupling;aryl-N-methoxy arylimides
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Xusen Li,Bingxin Sun,Liwei Lin,Yuanzhe Piao,Guowang Diao,Wang Zhang
This paper proposes a simple and rapid microwave-assisted phosphorus-oxygen doped porous carbon (P/O-PC) preparation strategy is proposed using potassium citrate, Phytic acid (PA), and ethanol under air atmosphere. PA can be used as both a phosphorus source and a microwave absorbing agent. The P/O-PC500–0.75 has a large specific surface area of 905 cm 2 /g. P/O doping introduces defects into the carbon structure, which enhances the capacitance of the porous carbon. The P/O-PC500–0.75 demonstrates excellent capacitance values of 330 F/g and 389.4 F/g in 6.0 M KOH and 1.0 M H 2 SO 4 , respectively (1 A/g). In addition, the symmetrical supercapacitors assembled with the P/O-PC500–0.75 exhibit good electrochemical stability over 5000 cycles at 5 A/g, with a capacitance loss of only 3.6%. This microwave-assisted strategy offers simplicity in operation and low energy consumption, providing a new and efficient pathway to prepare carbon materials in a fast and simple manner.
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-12
·
IF 15.7
Chen Tiantian,Zhang Ganbing,Sun Hongwei,Hua Yetong,Yang Shu,Zhou Dandan,Di Haoxin,Xiong Yiling,Hou Shenghuai,Xu Hui,Zhang Lizhi
The microenvironment regulation of Fe-N 4 single atom catalysts (SACs) critically governs peroxymonosulfate (PMS) activation. Although conventional heteroatom substitution in primary coordination enhances activity, it disrupts Fe-N 4 symmetry and compromises stability. Herein, we propose oxygen doping in the secondary coordination shell to construct Fe-N 4 -C 6 O 2 SAC, which amplifies the localized electric field while preserving the pristine coordination symmetry, thus trading off its activity and stability. This approach suppresses Fe-N bond structural deformation (bond amplitude reduced from 0.875–3.175 Å to 0.925–2.975 Å) during PMS activation by lowering Fe center electron density to strengthen Fe-N bond, achieving extended catalytic durability (>240 h). Simultaneously, the weakened coordination field lowers the Fe=O σ* orbital energy, promoting electrophilic σ-attack of high-valent iron-oxo towards bisphenol A, and increasing its degradation rate by 41.6-fold. This work demonstrates secondary coordination engineering as a viable strategy to resolve the activity-stability trade-off in SAC design, offering promising perspectives for developing environmental catalysts.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ChemCatChem
·
2025
·
IF 3.9
Hengyu Zhao,Jing Zhao,Xue Li,Bate Nasen,Yang Wu,Xinlong Wang,Jinxiong Wu,Yaya Wang
The catalytic reduction of 4-nitrophenol (4-NP), a persistent environmental pollutant faces dual challenges reliance on noble metals and inefficient utilization of hydrogen radicals (H*). Meanwhile, nickel-containing sludge generated by the electroplating industry, classified as hazardous waste has long posed significant disposal conundrums. Herein, we developed a noble metal-free pyroxene-type CaNi(Si 2 O 6 ) catalyst, synthesized from electroplating sludge, that simultaneously addresses these challenges through dynamically reconstructed Ni–O–Ca interface with oxygen vacancies and interfacial electron transfer channels. Ni@Ca-195/20 establishes a self-sustaining catalytic system, achieving a remarkable conversion of 96.8% with 0.1 mM NaBH 4 and 0.05 mg catalyst, while maintaining stability over 31 cycles in low concentration regimes. Integrated characterization combined with catalytic performance evaluation reveals an interfacial electron transfer mechanism: the engineered interface enables in situ reduction of Ni 2+ generates metallic electron-deficient Ni δ+ species, enhancing 4-NP − and BH 4 − adsorption through dual-site coordination. Oxygen vacancies accelerate BH 4 − hydrolysis, while electron transfer channels sustain H* flux via Ca 2+ modulated charge equilibration. This work establishes a waste-to-functionality paradigm for designing defect-engineered catalysts while advancing sustainable remediation of nitroaromatic pollutants. Graphical The Ni-plating sludge was converted into a Ni@Ca-195/20 catalyst with abundant oxygen vacancies and Ni–O–Ca heterointerfaces via the solvothermal method, which was used to efficiently catalyze the hydrogenation reduction of 4-nitrophenol.
✓ 已验证
产品关联
DOI
高影响因子
Foods
·
2025
·Vol. 14
·期 18
·3192
·
IF 5.1
Xiaomei Chen,Panpan Wu,Shuwei Wang,Jie Sun,Haitao Chen
In this study, we systematically characterize the volatile and non-volatile flavor profiles of coffee beans. Sensory evaluation demonstrated unique aromatic profiles for each coffee, with Colombia excelling in chocolate and nutty notes, while Bench Maji exhibited pronounced fruity characteristics. Yirgacheffe had a prominent roasted aroma, and Baoshan stood out for its stronger woody and caramel notes. The analysis employed solvent-assisted flavor evaporation (SAFE), gas chromatography–mass spectrometry/olfactometry (GC-MS/O), and high-performance liquid chromatography (HPLC). A total of 85 aroma compounds were identified, with furans, ketones, and pyrazines being the predominant contributors to roasted, nutty, and caramel aromas. Key aroma-active compounds, including furfural, guaiacol, and furaneol, exhibited the highest flavor dilution (FD) factors (up to 2187) and odor activity values, highlighting their pivotal roles in coffee aroma, with 4-vinyl-2-methoxyphenol (OAV = 761 in GL) and furaneol (OAV = 250 in BS) being particularly influential. Recombination and omission experiments validated the significance of these compounds. Non-volatile analysis revealed distinct differences in organic acids and chlorogenic acid content, with Colombia samples showing higher quinic acid levels, likely due to roasting-induced degradation. These findings provide a theoretical basis for understanding coffee flavor diversity and offer insights for quality assessment and origin identification.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Hongjiao Song,Binbin Hu,Yulong Zhou,Ye Wu,Jibao Wu,Hongsong Tian,Qifeng Liang,Yongsheng Tan,Zebo Fang,Lirui Yu,Huili Li,Shunhang Wei
Interface engineering has been proven to be a promising strategy for regulating carrier transport. Herein, an interfacial Mo–O–W bond was constructed between Bi2MoO6 nanospheres and WO3 quantum dots. It served as a fast transfer channel for interfacial photogenerated carriers, resulting in the formation of a direct Z-scheme heterojunction. The Z-scheme heterojunction not only maximized the redox ability but also exhibited enhanced separation and transfer efficiency of photogenerated carriers. Thereby, it exhibited excellent degradation activity and reusability for different simulated pollutants (levofloxacin, rhodamine B, and methylene blue) under LED irradiation, and its photocatalytic rate is approximately doubled. Unexpectedly, a considerable amount of H2O2 was formed via a direct one-step two-electron oxygen reduction reaction process, which played a significant role in the photodegradation process, even surpassing the role of electrons/holes as active species. Furthermore, the photodegradation pathway of levofloxacin by the Z-scheme heterojunction was analyzed. This study could provide insights into establishing an interfacial chemical bond, modulating charge transfer, and the photodegradation mechanism.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nano-Micro Letters
·
2025
·Vol. 17
·期 1
·1-14
·
IF 36.3
Zhong Yihong,Yuan Guotao,Bao Dequan,Tao Yi,Gao Zhenqiu,Zhao Wei,Li Shuo,Yang Yuting,Zhang Pingping,Zhang Hao,Sun Xuhui
The heteroatom atomically doping strategy was reported to construct highly
efficient sites on metal oxides for the detection of low-concentration gas.
The atomically dispersed Sn atoms were intentionally incorporated into the Fe 2 O 3
lattice during the oxidative annealing of Fe-based metal organic framework,
leading to specific Sn–O–Fe sites, porous structures, and abundant oxygen
vacancies.
The optimized Sn-Fe 2 O 3 exhibited exceptional sensing performance for NO 2
detection: ultra-high sensitivity ( Rg / Ra =2646.6 to 1 ppm NO 2 ), ultra-low limit of
detection (10 ppb), and high selectivity.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Science Advances
·
2020
·Vol. 6
·期 45
·
IF 13.117
Jiang Yan,Qinglei Meng,Xiaojun Shen,Bingfeng Chen,Yang Sun,Junfeng Xiang,Huizhen Liu,Buxing Han
Phenol is an important commodity chemical in the industry, which is currently produced using fossil feedstocks. Here, we report a strategy to produce phenol from lignin by directly deconstructing C sp2 –C sp3 and C–O bonds under mild conditions. It was found that zeolite catalyst could efficiently catalyze both the direct C sp2 –C sp3 bond breakage to remove propyl structure and aliphatic β carbon–oxygen (C β– O) bond hydrolysis to form OH group on the aromatic ring. The yield of phenol could reach 10.9 weight % with a selectivity of 91.8%. In this unique route, water was the only reactant besides lignin. A scale-up experiment showed that 4.1 g of pure phenol could be obtained from 50.0 g of lignin. The reaction pathway was proposed by a combination of control experiments and density functional theory studies. This work opens the way for producing phenol from lignin by direct transformation of C sp2 –C sp3 and C–O bonds in lignin.
✓ 已验证
DOI
高影响因子
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
·
2019
·Vol. 2019
·期 9
·1273-1278
·
IF 2.578
Wenqiang Chen,Qun Jing,Qiaoqiao Zhang,Ming-Hsien Lee,Xuefang Lu,Ping Wei,Zhaohui Chen
Introduction transition metal with d 10 electrons and lone pair cations with large radius into phosphate systems are helpful to get new crystal structure configuration. Guided by the above method, the first lead cadmium phosphate, Pb 2 Cd 3 (PO 4 ) 2 (P 2 O 7 ), was synthesized. Pb 2 Cd 3 (PO 4 ) 2 (P 2 O 7 ) features a three-dimensional (3D) structure, in which Pb(1) 2 O 8 dimer and Pb(2)O 5 polyhedra are filled between the two-dimensional (2D) layers, which are composed of unique [Cd 6 P 8 O 30 ] groups. In the Pb II M II PO (M II = without or divalent metal ions) systems, the title compound is the first phosphate containing two different P–O groups simultaneously. The ratios of cation/phosphorus (C/P) and polymerization modes of P–O anions have a close relationship by many structural comparisons. Thermal analysis shows that Pb 2 Cd 3 (PO 4 ) 2 (P 2 O 7 ) melts congruently and is thermally stable. In addition, the UV/Vis-IR diffuse reflectance spectrum and infrared (IR) spectrum have been reported. The relationship between electronic structure and optical properties was clarified by first-principles studies. Graphical The crystal structure of a new cadmium-based compound Pb 2 Cd 3 (PO 4 ) 2 (P 2 O 7 ), containing two kinds of P–O groups, exhibits unique [Cd 6 P 8 O 30 ] ∞ layers.
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Aijia Wei,Wen Li,Qian Chang,Xue Bai,Rui He,Lihui Zhang,Zhenfa Liu,Yanji Wang
Mg 2+ /F − co-doped LiNi 0.5 Mn 1.5 O 4 cathode material was synthesized by a facile one-step solid-state process. The effect of Mg 2+ /F − co-doping on grain morphology, phase structure, and electrochemical properties was studied by a series of characterizations. Scanning-electron-microscopy images show that Mg 2+ /F − co-doped LiNi 0.5 Mn 1.5 O 4 (denoted LNMO-MF) particles grow larger than pure LiNi 0.5 Mn 1.5 O 4 particles. X-ray diffraction, Raman spectra , Fourier transformation infrared spectroscopy , X-ray photoelectron spectroscopy, and cyclic-voltammetry tests indicate that all samples mainly display a Fd -3m space group and more Mn 3+ ions in the LNMO-MF sample after Mg 2+ /F − co-doping, which is conducive to increasing the cationic disorder degree and enhancing the electronic conductivity of electrode material. Results show that the LNMO-MF cathode material delivers an excellent rate performance with discharge capacities of 142, 144, 140 136, 132, 124, 115, and 100 mAh g −1 at 0.2, 0.5, 1, 2, 3, 5, 7, and 10C (1C = 140 mAh g −1 ), respectively. Remarkably, LNMO-MF also shows cycling stability with a capacity retention of 86.2% at 5C after 400 cycles, which is much higher than that of pure LiNi 0.5 Mn 1.5 O 4 (67.7%). The improvement of LNMO-MF's electrochemical properties could be ascribed to the Mg 2+ /F − co-doping, delivering a more stable structure, better crystallinity , the highest Li + diffusion coefficient , and the lowest charge-transfer resistance.
研究领域:
材料科学
·
电化学
·
无机非金属材料
·
能源存储
·
锂离子电池
·
固态化学
·
功能材料
✓ 已验证
DOI
高影响因子
EUROPEAN POLYMER JOURNAL
·
2026
·
IF 6.8
Di Ma,Xiaoming Huang,Pengfei Jiang,Minghao Zhai,Chunli Ma,Na Wei,Hongting Han,Wanan Cai,Tingting Zhou,Haijun Niu
Electrochromic supercapacitors (ECSCs) find extensive applications in flexible wearable, self-powered smart windows because of their visual energy storage characteristics. ECSCs simultaneously achieve rapid response, high transmittance and high specific capacity. Due to O, S heterocycle with more electron cloud which will bring more electroactive properties, two monomers and a series of polyamides (PAs) films containing furan, thiophene blocks (named as PA1, PA2, PA3, PA4, PA5 and PA6) are designed and synthesized. All the six PAs demonstrate a colorless to dark green/dark blue, while PA2 shows an initial optical contrast of 86 %, bleaching time (t b ) and coloring time (t c ) of 0.9 s and 1.2 s. Simultaneously PA2 delivers a specific capacitance of 197.2F g −1 at a current density of 1 A g −1 . When the current density rises to 20 A g -1 from 1 A g −1 , its capacitance retention rate remains at 79 % of its initial capacitance after undergoing 3000 charge–discharge cycles. ECSCs with PA1, PA2 assembled exhibit a ΔT of 70 % and 76 %. The ECSCs have a specific capacitance (60.1F g −1 and 69.1F g −1 at 1 A g −1 ), with 70 %, 69 % of initial specific capacitance following 2000 consecutive charge–discharge cycles. These PAs containing O, S heterocycle cores demonstrate promising prospect for ECSCs.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Chemistry
·
2026
·
IF 15.6
Xiaoxiao Duan,Suya Li,Xiuling Jiao,Yuguo Xia,Dairong Chen
Ruthenium oxide is among the most active electrocatalysts for the acidic oxygen evolution reaction (OER), yet its practical use is severely limited by anodic over-oxidation, lattice-oxygen participation, and the resulting Ru dissolution. Here, we report a monolithic RuO 2 -TiO x /Ti anode directly constructed on Ti felt through a one-step impregnation-calcination strategy, in which the native surface oxide evolves at only 400 °C into a rutile-like TiO x interlayer that is lattice-matched with rutile RuO 2 . The resulting structurally defined RuO 2 -TiO x heterointerface induces interfacial charge redistribution and tensile lattice distortion, thereby modulating the Ru–O coordination environment, attenuating Ru–O covalency, and suppressing excessive lattice-oxygen participation. Operando spectroscopy, isotope-labeling analysis, electrochemical probing, and theoretical calculations collectively reveal that such interfacial regulation shifts acidic OER toward the adsorbate-evolution mechanism while suppressing Ru overoxidation and local structural reconstruction. Beyond active-site modulation, the integrated TiO x interlayer and metallic Ti scaffold provide robust interfacial adhesion, efficient electron transport, and favorable gas/liquid transport under high-rate operation. As a result, RuO 2 -TiO x /Ti delivers an overpotential of 172 mV at 10 mA cm −2 , sustains 50 mA cm −2 for 1000 h with only 18 ppb Ru dissolution, and enables proton exchange membrane (PEM) water electrolysis at 1.65 V at 1 A cm −2 . This work highlights lattice-matched heterointerface engineering as an effective strategy for durable acidic OER electrodes. The lattice-matched RuO 2 -TiO x heterointerface induces charge redistribution and tensile distortion, elongating Ru–O bonds, reducing covalency, and suppressing lattice-oxygen participation for highly active and durable acidic oxygen evolution reaction (OER). Download: Download high-res image (145KB) Download: Download full-size image
✓ 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）