CHEMICAL ENGINEERING JOURNAL
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2025
·
IF 13.2
Yu Duan,Fozia Sultana,Xiaofan Zhang,Xiaoqing Yan,Xiangbowen Du,Meijie Shi,Peng Zhang,Xiaojun Qin,Kaicheng Qian,Tongtong Li,Mingwu Tan,Renhong Li
The urea oxidation reaction (UOR) presents a promising alternative to the oxygen evolution reaction (OER) for hydrogen production, offering a lower theoretical potential and capacity for wastewater treatment. However, the sluggish kinetics of UOR demand advanced catalyst development. Here, we report a tungsten-doped nickel catalyst (Ni 100 -W 1 -NF) synthesized via electrochemical deposition on nickel foam, which demonstrates exceptional catalytic performance. The Ni 100 -W 1 -NF catalyst achieves a current density of 100 mA cm –2 at 1.35 V vs. RHE during UOR, significantly surpassing undoped Ni-based catalysts. When integrated into a two-electrode system coupling UOR with the hydrogen evolution reaction (HER), the system operates at 1.56 V to reach 100 mA cm −2 , a notable voltage reduction compared to OER-coupled systems. Phase characterization and density functional theory (DFT) calculations reveal that the optimized W doping induces electron transfer from Ni to W, reducing the adsorption-free energies of OH – to − 4.23 eV and Ni (III)-urea to − 2.88 eV. This electronic modulation enhances UOR kinetics by accelerating the nickel-selective oxidation reaction (NSOR) and stabilizing high-valence nickel species. Compared to existing strategies, this work demonstrated the unique effectiveness of W doping in precisely tailoring electronic structures and reaction pathways, offering a sustainable and energy-efficient route for hydrogen production through urea electrolysis.
研究领域:
材料科学
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催化化学
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理论计算
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2026
·
IF 5.4
Haixia Zhang,Kaidi Zhao,Jiaping Chen,Renfei Chu,Xinru Xiang,He bian,Chenguang Ding
The polymerizable monomer ETPTA as the inner phase and Tween 80 as the emulsifier to construct O/W emulsions, which could be polymerized to solid polymers by UV-irradiation with the advantages of environmentally friendly and easy preparation. The stirring speed is an important factor affecting the mean size of emulison droplets and solid particles. Increasing the stirring speed is beneficial for the emulsion stabilization due to the small emulison droplets, which can construct smaller solid particles as the carriers of the catalytic active centers. PdNPs as functional metal nanomaterials are selected as the active centers attributed to the peroxidase activity, which can adsorb on the polymer surface (PdNPs@polymer) because of the electrostatic interactions. The analysis of PdNPs@polymer confirm the PdNPs are well-distributed at the polymer surface and have no noticeable aggregation. PdNPs@polymer can reduce 4-NP to 4-AP in the aqueous solution showing remarkable catalytic activity. The carrier polymer particles prepared with the largest stirring speed loaded with PdNPs has the best catalytic activity compared with the low stirring speeds. PdNPs@polymer with higher stirring speed has outstanding catalytic activity due to the numerous emulsion droplets and corresponding solid particles, which are contributed to the loading of PdNPs and improve the catalytic performance. Our findings of the novel catalyst composites are instructive in providing technical guidance for environmental remediation applications with better catalytic activity and being environmentally friendly.
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DOI
高影响因子
MOLECULES
·
2024
·Vol. 29
·期 23
·5495
·
IF 4.2
Anlin Zhang,Yue Yang,Yuqing Peng,Hao Zhou,Wei Tang,Jianhong Jiang,Yiting Wu,Shiying Cai,Lianwu Xie,Bin Deng
In this study, a series of Sr6LuAl(BO3)6:Sm3+red phosphors were successfully prepared with a high-temperature solid-phase technology. The Rietveld refinement analysis of the X-ray diffraction (XRD) diffraction patterns indicated that the as-prepared phosphors belong to theR3¯space group of the hexagonal crystal system. Under 404 nm near-ultraviolet excitation, the Sr6LuAl(BO3)6:Sm3+phosphor exhibits narrowband emission within the range of 550 to 750 nm. The primary emission peak is observed at a wavelength of 599 nm, corresponding to6H5/2→4F7/2. The optimum doping concentration of the Sr6LuAl(BO3)6:xSm3+phosphor is 10 mol%. Nearest-neighbor ion interaction is the mechanism of concentration quenching. The synthesized phosphors demonstrate exceptional thermal stability, with a high quenching temperature (T0.5> 480 K). Furthermore, the assembled white light-emitting diode (w-LED) device exhibits a low color temperature (5464 K), an excellent color rendering index (Ra= 95.6), and CIE coordinates (0.333, 0.336) close to those of standard white light. Collectively, these results suggest the enormous potential of Sr6LuAl(BO3)6:Sm3+phosphors for applications in w-LEDs.
研究领域:
材料科学
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光学
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DOI
高影响因子
Applied Sciences-Basel
·
2018
·Vol. 8
·期 12
·
IF 1.689
Xinbo Zhu,Yaolin Wang,Yu Huang,Yuxiang Cai
In this work, a series of Ce-W-Ti catalysts were synthesized using a solution combustion method for the selective catalytic reduction (SCR) of NO with NH3at low temperatures. The reaction performance of NH3-SCR of NO was significantly improved over the Ce-W-Ti catalysts compared to Ce0.4Ti and W0.4Ti catalysts, while Ce0.2W0.2Ti showed the best activity among all the samples. The Ce0.2W0.2Ti catalyst exhibited over 90% removal of NO and 100% N2selectivity in the temperature range of 250–400 °C at a gas hourly space velocity (GHSV) of 120,000 mL·g−1·h−1. The Ce-W-Ti catalysts were characterized using N2adsorption-desorption, X-ray diffraction, X-ray photoelectron spectrometry and temperature programmed desorption of NH3to establish the structure-activity relationships of the Ce-W-Ti catalysts. The excellent catalytic performance of the Ce0.2W0.2Ti catalyst could be associated with the larger specific surface area, highly dispersed Ce and W species, increased amount of surface adsorbed oxygen (Oads) and enhanced total acidity on the catalyst surfaces.
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DOI
高影响因子
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
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2022
·
IF 4.804
Xin Lan,Zhi-Bo Li,He Zhang,Guo-Hua Zhang
Oxide dispersion-strengthened (ODS) molybdenum‑tungsten (Mo W) alloys are ideal materials for plasma-facing components of fusion reactors. In this paper, the effects of rare earth oxides (RE x O y ) Y 2 O 3 , CeO 2 and La 2 O 3 on the sintering behavior , microstructural and mechanical properties of Mo W solid solution alloys were investigated. The initial alloy powders were produced by spray drying combined with the two-step reduction method (composed of carbothermal reduction and deep hydrogen reduction steps), and the solid solution alloy with good mechanical properties was prepared by subsequent sintering. The results showed that the doping of rare earth oxides suppressed the grain growth of Mo W alloy, and thus improved the mechanical properties. Compared with CeO 2 and Y 2 O 3 , the doping of La 2 O 3 is more favorable to obtain dense and fine-grained Mo W solid-solution alloys. The doping of La 2 O 3 produced a larger Zener force and interfacial drag force, which effectively hindered the grain boundary migration and refined the grains. The microhardness and bending strength of Mo-30 W-1La 2 O 3 alloy reached the maximum values of 557 HV and 771 MPa.
研究领域:
材料科学
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冶金学
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核材料
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机械工程
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DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2026
·
IF 21.1
Jie Yang,Yu Luo,Zhichao Chen,Junjiang Zhu
The selective catalytic reduction of NO with NH 3 (NH 3 −SCR) reaction is governed by the interplay of surface acidity and redox activity, yet the mechanism of their cooperation remains elusive. Herein, Ce–O–W linkages were constructed on Ce/ZrO 2 to couple Ce 4+ /Ce 3+ redox cycle with tungsten-derived acidity. Operando DRIFTS and transient experiments revealed that gaseous NO reacts directly with NH 3 adsorbed on Lewis Ce 4+ sites, following an Eley–Rideal pathway. Brønsted acid sites from Ce–O–W acted as NH 4 + reservoirs, dynamically replenishing Lewis-bound NH 3 and sustaining continuous reactivity. Operando UV–vis spectroscopy confirmed that NO + NH 3 exposure reduced Ce 4+ to Ce 3+ , while O 2 re-oxidized Ce 3+ to Ce 4+ , establishing the redox cycle. Density functional theory calculations supported that NH 3 dehydrogenation on Ce sites and subsequent coupling with gaseous NO were energetically favorable, while O 2 -assisted Ce 3+ re-oxidation required the highest energy barrier. These results highlight the cooperative function of Ce–O–W acid–redox site in promoting SCR activity through dynamic L–NH 3 /B–NH 4 + interplay and sustained Ce redox cycling.
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DOI
高影响因子
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
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2022
·
IF 4.804
Yongqi Lv,Siqi Zhao,Tao Liu,HuiChao Cheng,Jinglian Fan
Powder plays an important role in the performance of tungsten composites. In this work, the nano-scaled W-Y 2 O 3 powder was successfully synthesized by two-stage process of nano in-situ composite method: the calcination in air and hydrogen reduction . The phase transformation and microstructure evolution of powder were investigated and observed by the XRD , SEM, EDS and TEM technologies. Besides, the reaction and refining mechanisms for hydrogen reduction have initially proposed as well. Results showed that the phase transformation processes went through two stages of dehydration and deamination and finally forms complete tungsten oxide during the calcination stage. While, in the reduction stage, WO 3 phase was mainly reduced to different WO X (1/3 ≤ x < 3) intermediate phase, especially the formation of W 3 O phase. The morphology of reduction of W-Y 2 O 3 powder evolves from hollow spheres to slices, fragments and nano-irregular polygon as the reduction temperature increases. Simultaneously, the average particle size of W-Y 2 O 3 powder decreases significantly with the increase of reduction temperature, while the reduction temperature is 800 °C, the change trend is opposite, but it's still much lower than pure tungsten. The addition of Y 2 O 3 significantly affected the phase transition and microstructure evolution behavior of composite powders . The reduction was started from the surface region of powder, and then in the form of cracks or porous structures extend into the interior of the powder until all the nano-particles were formed, which was able to be explained by “shrinkage fissure - particle rupture” and “nucleation - evaporation - sedimentation” model. Moreover, the core-shell structure and Y 2 WO 6 phase formed by addition of Y 2 O 3 can hamper the chemical vapor transport (CVT) and the formation of WO 2 (OH) 2 phase, thus significantly refining the reduced W-Y 2 O 3 powder(115 nm).
研究领域:
材料科学
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粉末冶金
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纳米材料
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相变
·
氢还原
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DOI
高影响因子
JOURNAL OF CATALYSIS
·
2025
·
IF 6.5
Ajibola T. Ogunbiyi,Wenzhi Li,Amir Hamza,Chenchen Gui,Liqun Wang
Despite significant advances in lignin depolymerization studies, the specific combination of Mo and W in bimetallic catalysts and their impact on hydrogen activation and Lewis acidity in lignin conversion remains poorly understood, particularly in terms of the synergistic effects that enhance efficiency and selectivity. A bimetallic Mo x W y /H-Beta catalyst was synthesized via incipient wetness impregnation with the catalyst characterized using XPS, H 2 -TPR, NH 3 -TPD, and other methods. The catalyst demonstrated high activity for selective kraft lignin depolymerization due to the synergy between Lewis acid sites, hydrogen activation sites, and the Mo-W interaction on the support. The proximity of metal and acid sites facilitated effective diffusion of intermediates, leading to enhanced synergy and the eventual cleavage of etheric C–O bonds. A Liquid fuel (LF) yield of 84.3 % and 71.6 % kraft lignin conversion at 300 °C without external hydrogen. The higher heating value (HHV) increased from 25.45 MJ/kg in the original kraft lignin feed to 35.9 MJ/kg in the LF. XPS analysis showed a predominant amount of Mo 6+ on the fresh catalyst surface, with complete conversion to lower oxidation states during the reaction. This study provides insights into the structure–activity relationships of Mo-based bimetallic catalysts, highlighting the importance of hydrogen activation sites and acidic sites in kraft lignin depolymerization.
研究领域:
催化化学
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可再生能源
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生物质转化
·
可持续化学
·
材料科学
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Wenke Ruan,Shuli Gu,Wei Li,Heru Li,Qianchuan Xiao,Mubiao Xie
The development of efficient, tunable excitation/emission and sustainable luminescence mode single-phase inorganic luminescent materials plays an important role in the progress of information encryption and advanced anti-counterfeiting technology. Herein, a general high temperature solid phase method was employed to synthesize Bi 3+ and Eu 2+ co-doped BaZrSi 3 O 9 (BZSO) phosphors, which show properties of spectral tuning and temperature sensitivity and have potential applications in lighting and anti-counterfeiting. The optimized cyan-emitting phosphor BZSO:0.03Bi 3+ ,0.05Eu 2+ phosphor in w-LED devices to significantly improves the color rendering index (CRI) from 89 to 93, while the correlated color temperature (CCT) is reduced from 5002 K to 4609 K. By substitution of Bi 3+ with varying concentrations of Eu 2+ in BZSO, the luminescent color of the hosts can be tuned from yellow to green. The photoluminescence (PL) spectra of BZSO:0.03Bi 3+ ,0.05Eu 2+ sample varies with the excitation wavelength (270 to 420 nm). The prepared powder was mixed with soluble polyvinyl alcohol (PVA) to prepare advanced anti-counterfeiting ink. The prepared of BZSO:0.03Bi 3+ ,0.05Eu 2+ /PVA composite luminescent film not only has good thermal stability, water resistance, transparency, flexibility, foldability and easy processing performance, but also has the characteristics of adjustable multi-mode luminescence and sustainable luminescence. In short, this changing-color and long-lasting luminescent fluorescent material offers the possibility of sophisticated advanced anti-counterfeiting applications in the future.
研究领域:
材料科学
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光学材料
·
固态照明
·
防伪技术
·
发光材料
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产品关联
DOI
高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
·
2025
·Vol. 39
·期 11
·e70410
·
IF 0
Li-Li Xue,Qing He,Zhuang-Zhuang Li,Jia-Qi Wu,Si-Wen Li,Jian-She Zhao
The global demand for sustainable and cleaner energy sources has driven more research on advanced desulfurization technologies from fossil fuels, in which oxidative deep desulfurization has become a hotspot. In this paper, the nucleation-controlled method was used to realize the uniform growth of porous amino metal–organic framework (MOF) on green-friendly cotton fibers (CF), and the pore structure and amino functional groups on MOF were beneficial to firmly anchor of P-Mo-W polyoxometalate (POM) active species. Thus, a kind of new supported P-Mo-W POM composite catalyst (POM@MIL-101@CF) has been obtained and exhibited excellent oxidative desulfurization performance for fuels. Under the optimal reaction conditions: T = 60°C, O/S = 7, two pieces of catalyst, the ODS efficiency of 0.5-POM@MIL-101@CF for DBT could reach 99.57%, with slight changes after more than 5 reuse times. Meanwhile, EPR experiments proved that ·O 2 − and ·OH radicals were both the main reactive substances, which promoted the remarkable catalytic desulfurization performance of POM@MIL-101@CF. Therefore, this kind of supported POM catalyst is simple to prepare and green-friendly in raw materials, as well as the strong binding between POM and CF with the bridging effects of MIL-101 makes it better adapt to the needs of actual industrial production and has a broad application prospect in practical desulfurization applications.
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产品关联
DOI
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Zheng Hu,Xueli Yang,Yalin Zhang,Zhen Sun,Wenlu Liu,Guofeng Pan,Haichao Wang,Ming Sun
In this study, a simple hydrothermal method was used to synthesize metal-organic framework-derived Sn/W co-doped NiO hollow flower-like spherical structure. The prepared NiO composites were utilized to prepare gas sensors to explore the response characteristics to different gases. The results showed that the response of the bimetal-doped NiO hollow microspheres to trimethylamine was 95 at 100 ppm, which was 63 times that of the pristine NiO nanoflowers. In addition, the sensor has a ppb-level detection limit for trimethylamine (0.1 ppm, 1.5). These good sensing performance of the Sn/W co-doped NiO sensor are not only affected by the initial resistance(R a ), but are also closely related to the rich oxygen vacancies, special hollow flower-like spherical structure and high Ni 3+ /Ni 2+ ratio in the composite nanomaterials. This study provides an elegant co-doping method to improve the gas sensing performance of P-type MOS.
研究领域:
材料科学
·
纳米科技
·
传感器技术
·
无机化学
·
功能材料
✓ 已验证
DOI
高影响因子
FOOD HYDROCOLLOIDS
·
2020
·
IF 7.053
Xingzhong Zhang,Xiaogang Luo,Yixiang Wang,Yan Li,Bin Li,Shilin Liu
In this work, concentrated Pickering emulsions had been prepared by using soybean protein isolate (SPI) and TEMPO-oxidized bacterial cellulose (TOBC) complex as solid stabilizers. The effects of solid particle content, pH and oil phase volume fraction on the morphology, stability and rheological behaviors of the emulsions had been investigated. It indicated that the emulsion droplets had uniform particle size distribution when the ratio of SPI/TOBC was controlled to 12.5:1 (wt/wt). The emulsification performance could be improved with the increase of solid complex particles content from 1.0% to 3.0%. Moreover, the pH played an important role in regulating the structure and properties of the emulsions. With microscopic observation, the emulsions at pH 7.0 had smaller droplet size (10–15 μm) than that (15–40 μm) of the emulsions at pH 3.0. While the emulsions at pH 3.0 maintained a low creaming index (CI) value than those at pH 7.0, and uniform cellular network structure could be seen by SEM observation. It suggested that the electrostatic complexation between soy proteins and anionic bacterial cellulose nanofibrils at pH 3.0 was more favorable for stabilizing emulsions than those at pH 7.0. This work would provide some guidance for regulating the properties of emulsions that stabilized by soy protein and cellulose nanofibrils.
研究领域:
食品科学
·
材料科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）