JOURNAL OF ALLOYS AND COMPOUNDS
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2026
·
IF 6.7
Mingming Dong,Zewen Huang,Shuyong Yang,Peng Zhou,Shenghui Tu
The growing prevalence of antibiotic residues in aquatic environments, particularly recalcitrant antibiotics like tetracycline (TC), poses significant ecological risks. In this study, a novel Bi 2 WO 6 /Mo-doped BiVO 4 /NH 2 -UiO-66 (BBU) ternary heterojunction photocatalyst was successfully synthesized via a solvothermal method to enhance visible-light-driven TC degradation through component synergy. Systematic characterization revealed that Mo doping induced lattice distortion in BiVO 4 , while the incorporation of NH 2 -UiO-66 drastically increased the specific surface area from 23.647 to 398.804 m 2 ·g −1 , providing abundant active sites. Photoluminescence (PL) and Electrochemical Impedance Spectroscopy (EIS) analyses demonstrated that the optimized BBU-3 sample exhibited the lowest charge carrier recombination rate. Under visible light irradiation for 80 min, BBU-3 achieved 95.2% degradation of TC, with reaction kinetics 8.61, 15.76, and 5.01 times higher than those of pristine Bi 2 WO 6 , BiVO 4 , and binary heterojunctions, respectively. Degradation-trapping experiments and electron paramagnetic resonance (EPR) measurements indicate that h + , 1 O 2 and ·O 2 - are the primary reactive species, suggesting that this system is a synergistic radical-non-radical degradation system. Additionally, possible degradation pathways and intermediate toxicity were evaluated. This work offers a promising strategy for designing efficient bismuth-based MOF heterojunctions for antibiotic remediation in water.
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高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2026
·
IF 6.4
Chenguang Zhang,Chuancheng Dongye,Chenglong Yuan,Mengran He,Zhihe Li,Weiming Yi,Andong Zhang,Shaoqing Wang
The deoxygenation and alkylation reactions during the co-pyrolysis of lignin and SBC were investigated. • Mo-doped biochar increased alkylphenols selectivity from 6.5% to 33.0%. • In-situ DRIFTS and DFT calculations were used to investigate the pyrolysis mechanism. • The electron-donating effect of methoxy groups facilitated the adsorption of methoxyphenols onto the catalyst. • The formation mechanism of alkylphenols was proposed. Lignin pyrolysis is a sustainable pathway for synthesizing high-value alkylphenol chemicals and fuels. In this study, the co-pyrolysis process of lignin and spent bleaching clay was investigated for producing alkylphenols. The effects of different metal-loaded biochars, pyrolysis temperatures, and lignin-derived phenolic compounds on the distribution of pyrolysis products were examined. The results showed that the total acid content in Mo/C was 3.39 times higher than that in the pristine carbon. Additionally, Mo/C exhibited the highest number of weak acid sites (56.0%), abundant surface oxygen-containing functional groups, and a microporous structure. These characteristics facilitated both the cleavage of methoxy groups (C Ar –OCH 3 ) and the occurrence of aromatic C–C coupling reactions, thus increasing the selectivity of alkylphenols from 6.5% to 33.0%. Alkylphenol yield peaked at 500°C, whereas higher temperatures favored demethoxylation over coupling. Methoxyphenol exhibited an approximately 20–25% higher alkylation rate than phenol. Electrostatic potential calculations attributed this enhancement to the electron-donating effect of the methoxy group, which facilitated its attack by electrophilic alkyl fragments. In-situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) revealed the anchoring of phenolic intermediates on the Mo/C surface through Mo–O bonds. Charge difference calculations revealed electron transfer between the oxygen-containing functional groups of phenolic compounds and the Mo/C catalyst, thereby activating the C–O bond. Alkylphenols were generated through two distinct pathways: the deoxygenation of methoxyphenols and the coupling reaction between phenol and alkyl fragments. The deoxygenation pathway was more energetically favorable. This study provides insight into the low-cost and efficient production of green alkylphenol compounds. Download: Download high-res image (202KB) Download: Download full-size image
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Catalysis Science & Technology
·
2025
·
IF 4.2
Yifan Zhang,Jiaying Liu,Shiwei Wang,Zhihao Yu,Haojian Zhang,Dong Wang,Lin Zhu,Chunzheng Wu,Hongbo Yu
Modifying noble metal catalysts with transition metal oxides (MO x ) can markedly enhance catalytic performance through synergistic effects, yet precise spatial colocalization of active metal and promoter phases remains challenging. Here, we report the synthesis of KIT-6 supported Pd-MO x (M = Fe, Co, Ni) hybrid nanostructures via in situ transformation of bimetallic PdM nanoparticles under controlled thermal conditions. The resulting Pd-MO x /KIT-6 catalysts displayed superior activity and selectivity in the selective hydrogenation of acetophenone to 1-phenylethanol compared with monometallic Pd/KIT-6. Among them, Pd-CoO x /KIT-6 (Pd/Co=1:1) achieved the highest performance, with 99.7% acetophenone conversion and 98.2% selectivity, and demonstrated broad applicability for hydrogenating diverse ketones. Structural and kinetic studies revealed that interfacial Pd-CoO x sites play a pivotal role: Pd domains efficiently dissociate H 2 , while CoO x species enhance acetophenone adsorption. This synergistic interface-driven mechanism provides a general and costeffective strategy for the selective hydrogenation of multifunctional substrates.
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APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Wenbin Ruan,Jianli Chen,Shijian Zhang,Xiuxiu Huang,Xiang Li,Shuangshuang Huai,Congliang Cheng,Mingxuan Qu,Hewen Liu,Xiufang Wang,Ping Li
Here, the Bi 24 O 31 Br 10 -based composite photocatalysts modified by bimetallic Bi and Mo nanoparticles (NPs) are designed and prepared (Bi-Mo-Bi 24 O 31 Br 10 ). 2D ultra-thin Bi 24 O 31 Br 10 nanosheets with suitable band gap and good chemical and optical stability are selected as the main catalyst to drive N 2 fixation by generating hot carriers. The Bi NPs in the Bi 24 O 31 Br 10 nanosheets serves as a buffer tank for electrons to improve the efficiency of electron transfer. Meanwhile, the Mo NPs serve as catalytic centers for N 2 adsorption and activation, working synergistically to enhance the overall reaction efficiency. Resulting from semiconductor-to-metal −to-metal electron transfer path and the Mo metal adsorption and activation mechanism, the nitrogen fixation rate of the Bi-Mo-Bi 24 O 31 Br 10 photocatalyst is as high as 191.2 μmol g −1 h −1 , and it is 7.2 times compared to pure Bi 24 O 31 Br 10 . This work creates a novel framework for the rational design of highly efficient visible-light-responsive nitrogen fixation catalysts.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2025
·
IF 6.3
Qixin Yang,Zengkun Wang,JingJing Li,Jing Di,Xikun Gai,Yaofeng Zhu
Distinguished by a unique three-dimensional (3D) network structure and commendable electrical conductivity, one-dimensional (1D) carbon nanofibers (CNF) exemplifies a pivotal class of microwave absorption materials. However, their effective absorption bandwidth (EAB) suffers from inadequacy on account of poor impedance matching. To conquer this drawback, a novel in situ dual-doping strategy was employed in this article. Incorporating boron (B) and low-valence-state molybdenum (Mo), this strategy is merged with electrospinning and high-temperature treatment, aimed to fabricate Mo and B co-doped carbon nanofibers (Mo-B/CNF) with superior microwave absorption performance. An array of characterization techniques were leveraged to delve into the microstructure and properties of the Mo-B/CNF. The analysis corroborated a uniform distribution of Mo and B elements within the carbon matrix, alongside the formation of Mo 2 N species. Outstanding microwave absorption was identified for the resulting Mo-B/CNF, accompanied by a minimum reflection loss of -57.7 dB at 10.3 GHz and an EAB of 6.05 GHz. As further demonstrated by radar cross-section simulations, the Mo-B/CNF is capable of attenuating electromagnetic scattering from metallic backplanes and large unmanned aerial vehicles, which highlights their promise in radar stealth applications. Following a structural optimization via 3D electromagnetic simulation software, the metamaterial fabricated from Mo-B/CNF attains an ultra-broad effective absorption bandwidth (EAB) of 32.1 GHz across the 2-40 GHz frequency range. This study delineates the electromagnetic wave absorption traits of Mo-B/CNF, and provides another insight for designing next-generation microwave absorption materials.
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International Journal of Electrochemical Science
·
2023
·
IF 1.5
Bo Wang,Yanhong Liu,Jinhui Hao,Junbo Zhong,Furong Yu,Kewei Zhang,Hao Shen,Baodong Mao
Earth-abundant metal sulfides attracts large attention in recent years for hydrogen production via electrocatalytic water splitting. However, most works have been limited to the acidic condition, whereas the hydrogen evolution reaction (HER) in alkaline condition has rarely been discussed. Here we present an effective strategy for the growing of Co-Mo-S catalysts on carbon cloth via the controllable incorporation of cobalt into MoS 2 with L-cysteine and phosphomolybdic acid to achieve the synergistic interaction of CoS 2 and MoS 2 . The optimized Co-Mo-S catalysts (Co:Mo=1:2) showed a largely improved HER activity with an overpotential of 92 mV at current density of 10 mA cm -2 and Tafel slope of 82 mV dec -1 . The origin of the activity enhancement was investigated through a series of characterizations, where the synergetic effect of the intrinsic fast HER kinetics of metallic CoS 2 and the high active surface area of MoS 2 plays a crucial role. With appropriate amount of cobalt, the Co-Mo-S catalysts show a relatively uniform distribution on the carbon cloth to ensure the large surface area, whereas excessive cobalt results in the formation of the large CoS 2 particles with low HER activity from the low active surface area. Further electrochemical measurements demonstrated that the combination of larger exchange current density of CoS 2 and the high electrochemical double–layer capacitance (proportional to the active surface area) of MoS 2 together contributed to the HER activity enhancement of the Co-Mo-S catalysts. The Co-Mo-S/CC catalysts also show robust stability in alkaline solution. Our work provides a more profound understanding and an interesting view for the design of efficient ternary transition metal sulfide HER catalysts in alkaline condition by synergetic optimization of the intrinsic HER kinetics and the electrochemical active surface area.
研究领域:
材料科学
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化学工程
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能源科学
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Metals
·
2023
·Vol. 13
·期 2
·246
·
IF 2.9
Qi Wang,Lijun Wang,Wei Zhang,Kuochih Chou
Experiments were carried out to determine the effect of cooling rate on the nucleation, growth and microstructure evolution during the solidification process in Ce containing S31254 high Mo austenite stainless steel (HMASS). In situ observations and in situ quenching tests indicate that the Ce effects in this steel are to refine the equiaxed grain and change in the secondary phase from σ to δ, but are mainly suitable for the medium and low cooling rate. The high cooling rate is highly beneficial for austenite nucleation and significantly influence the primary austenite grain growth behavior. The growth velocity for austenite grain is increased with the increase in cooling rate. The morphology of the primary austenite would change from a crescent shape to rod shape with the cooling rate increased from 50 °C/min to 100 °C/min. Rod-shaped grains with high nucleation densities would make primary grains easy to be combined together, which would reduce the ability of the refined grain. Furthermore, a high cooling rate could slightly improve the solute redistribution, while it significantly deteriorated the micro-segregation of Mo in a solidified structure. The main reason is that high cooling rate could worsen the kinetic condition of ferrite precipitation and postpone the precipitation reaction at the end of the solidification process.
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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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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2019
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IF 3.375
Jiaming Cheng,Yan Xu,Zhaopeng Liu,Zhenhua Li,Baowei Wang,Yujun Zhao,Xinbin Ma
A series of Mo-based catalysts supported on Ce1–xLaxO2−δ solid solution were prepared and performed in sulfur-resistant methanation. Characterization results suggested the formation of Ce1–xLaxO2−δ solid solution with a cubic fluorite structure. The correlation between the surface concentration of Ce3+ and oxygen mobility was well revealed. The higher oxygen storage capacity induced by La dopant enhanced the reducibility of the MoO3/Ce1–xLaxO2−δ during the sulfidation. Meanwhile, the presence of oxygen vacancy induced by Ce3+ prompted the sulfidation of Mo species, resulting in a higher dispersion of MoS2. The coupling between the CO hydrogenation and water–gas-shift (WGS) reaction is important for the sulfur-resistant methanation. The apparent methanation rate is easily determined by CO hydrogenation, and WGS reaction could provide more H2 for the CO hydrogenation. MoO3/Ce0.8La0.2O2−δ catalyst exhibited the highest activity in a broad temperature regime of 450–550 °C due to its high MoS2 dispersion and surface concentration of Ce3+.
研究领域:
催化化学
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能源化学工程
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材料化学
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表面科学
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工业催化
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2026
·
IF 9.2
Xingxing Jiang,Yu Li,Xiao Du,Yang Zhao,Donghong Duan,Zhonglin Zhang,Xiaogang Hao
Developing stable and efficient non-precious metal electrocatalysts for oxygen evolution reaction (OER) is crucial for advancing water electrolysis and sustainable energy systems. Herein, we exploit a trimetallic MoNiFe metal-organic framework (MOF) with high surface area, porosity, synergistic active sites derived from metallic components, and charge-tunable organic ligands. Via a solvothermal synthesis followed by gas-phase phosphorization, the MoNiFe-MOF/NF precursor is transformed into Mo–NiFeP@NC/NF. Benefiting from structural and compositional advantages, Mo–NiFeP@NC/NF exhibits superior OER activity and stability in alkaline media compared to commercial RuO 2 /NF. The catalyst achieves current densities of 50 and 100 mA cm −2 at low overpotentials of 271 and 303 mV, respectively, along with a reduced Tafel slope, indicating favorable reaction kinetics. Moreover, the electrode shows negligible activity degradation after continuous operation at 50 mA cm −2 for 61 h. This work provides a new insight into the rational construction of efficient and stable non-precious metal OER catalysts based on metal doping and MOF-derived strategies.
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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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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Rui Ming,Jingjing Du,Lijian Xu,Yong Xu,Zhao Liang,Qiao Liu,Dongjiang Yang,Qiliang Wei,Weiyou Yang,Qing Shi
Fe doping reduces the Volmer barrier of MoNi 4 to enhance HER activity. • Mo leaching induces reconstruction into active NiMoFeOOH@MoO 4 2- for OER. • The AEMWE using this catalyst as dual electrodes reaches low voltages at 500 and 1000 mA cm -2 . • The electrolyzer operates stably for over 200 h, revealing great application potential in water electrolysis. The hydrogen evolution reaction (HER) is fundamentally limited by the sluggish water dissociation step, while the oxygen evolution reaction (OER) is constrained by the reconstruction behavior of the catalyst under operating conditions. Herein, we report a Fe-doped NiMoO x nanoflower decorated with Fe-doped MoNi 4 nanoparticles (Fe-MoNi 4 @NiMoO x ). Density functional theory (DFT) calculations reveal that the incorporation of Fe lowers the Volmer step energy barrier for MoNi 4 , thereby boosting its HER performance. For the OER, Mo leaching drives the reconstruction of MoNi 4 into catalytically active NiMoFeOOH@MoO 4 2− . Furthermore, theoretical calculations confirm that Fe/Mo doping and adsorbed MoO 4 2− facilitate rapid electron transfer within NiMoFeOOH and reduce the energy barrier of the rate-determining step for the OER. As a result, the Fe-MoNi 4 @NiMoO x catalyst delivers exceptional HER and OER activities, with overpotentials as low as 102 and 212 mV for HER, and 278 and 343 mV for OER at current densities of 100 and 500 mA cm −2 , respectively, alongside excellent stability exceeding 100 h at 500 mA cm −2 . When employed as both the cathode and anode in an anion exchange membrane water electrolyzer (AEMWE), this catalyst achieves current densities of 500 and 1000 mA cm −2 at low cell voltages of 2.22 and 2.56 V, respectively, while maintaining stable operation for over 200 h at 500 mA cm −2 . Fe-MoNi 4 @NiMoO x nanoflower electrode was developed for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). For HER, Fe incorporation lowers the Volmer step energy barrier of MoNi 4 , thereby boosting its HER performance. For OER, Mo leaching induces reconstruction into NiMoFeOOH@MoO 4 2− , where Fe/Mo doping and MoO 4 2− adsorption synergistically enhance electron transfer and reduce the rate-determining step barrier. Download: Download high-res image (241KB) Download: Download full-size image
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