Journal of Materials Research and Technology-JMR&T
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2025
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IF 6.6
Lebing Chang,Kun Li,Zeyun Cai,Peng Du,Yongxiao Wang,Chao Zhou,Enxiang Jiao,Ahsan Riaz Khan,Guoqiang Xie,Weizong Bao,Haijun Zhang
Mo alloys have emerged as a promising biodegradable metallic material due to its inherent biocompatibility and mechanical robustness. However, its clinical translation is limited by slow degradation kinetics and intrinsic brittleness. In this study, we propose a powder metallurgy-based strategy to develop immiscible Mo-Cu alloys that overcome these challenges. Cu is introduced as alloying element which due to higher corrosion potential, excellent plasticity and antimicrobial properties. The optimized Mo-Cu alloy shows a notable increase in strength by 150 MPa while maintaining ductility. Moreover, the degradation rate nearly doubles from 2.553×10 -2 to 4.765×10 -2 mm/y) due to microstructural refinement and galvanic effects. In vitro studies further confirm the biocompatibility and enhanced antibacterial performance of Mo-Cu alloys. This work provides a practical pathway for designing next-generation biodegradable implants based on immiscible alloy systems.
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Journal of Energy Chemistry
·
2022
·
IF 13.599
Siyu Zheng,Hongye Qin,Xuejie Cao,Tongzhou Wang,Wenbo Lu,Lifang Jiao
Combining urea oxidation reaction (UOR) with hydrogen evolution reaction (HER) is an effective method for energy saving and highly efficient electrocatalytic hydrogen production . Herein, molybdenum-incorporated cobalt carbonate hydroxide nanoarrays (Co x Mo y CH) are designed and synthesized as a bifunctional catalyst towards UOR and HER . Benefiting from the Mo doping, the dispersed nanoarray structure and redistributed electron density, the Co x Mo y CH catalyst display outstanding catalytic performance and durability for both HER and UOR, affording the overpotential of 82 mV for HER and delivering a low potential of the 1.33 V for UOR (vs. reversible hydrogen electrode, RHE) to attain a current density of 10 mA cm − 2 , respectively. Remarkably, when Co x Mo y CH was applied as bifunctional catalyst in a two-electrode electrolyzer, a working voltage of 1.40 V is needed in urea-assisted water electrolysis at 10 mA cm −2 and without apparent decline for 40 h, outperforming the working voltage of 1.51 V in conventional water electrolysis.
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Science China-Materials
·
2021
·Vol. 65
·期 5
·1285-1293
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IF 8.273
Zheng Mang,Li Qi,Liu Mingyang,Liu Jianan,Zhao Chen,Xiao Xudong,Wang Hongli,Zhou Jing,Zhang Liping,Jiang Baojiang
As an n-type semiconductor, In 2 O 3 is considered a promising photocatalyst for producing amino acids using biomass derivatives as precursors. However, similar to other intrinsic semiconductors, In 2 O 3 suffers from poor charge dynamics. Herein, we show the synthesis of Mo-doped In 2 O 3 (Mo-In 2 O 3 ) with a porous rod-shaped structure through a one-step solvothermal reaction followed by calcination. Under visible-light irradiation, Mo-In 2 O 3 achieves a high conversion rate of 81% for the reaction that transforms lactic acid into alanine with a selectivity of 91%. Spectroscopic techniques and density functional theory calculations reveal that Mo doping introduces defect states slightly below the conduction band of In 2 O 3 , which improves the separation of photogenerated electron-hole pairs. In addition, Mo atoms on the surface form extra adsorption and reaction centers that greatly enhance the reaction rate. This work provides insights into the development of transition metal-doped semiconductor photocatalysts to produce amino acids.
研究领域:
材料科学
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光催化
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半导体材料
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生物基化学品
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分子催化
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纳米材料
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高影响因子
DALTON TRANSACTIONS
·
2026
·
IF 3.3
Chang-Yuan He,Kun Hu,Jing-Yang Zhou,Long Wu,Jian-Han Zhang
Two new Mo-Te-O compounds, (NH₄)₂MgMo₄Te₂O₁₈ and β-MoTe₂O₇, have been synthesized and structurally characterized as frameworks constructed from distorted MoO₆ octahedra and TeO₃ trigonal pyramids with stereochemically active lone pairs.The two phases feature distinct Mo-O-Te connectivities and dimensionalities, leading to different degrees of optical anisotropy. Polarized optical microscopy measurements reveal that both compounds exhibit moderate birefringence, which is further rationalized by density functional theory calculations.The incorporation of Mg²⁺ in (NH₄)₂MgMo₄Te₂O₁₈ results in a more structurally elaborate framework, and this compound shows a black crystal surface with a white interior, indicative of surface-related electronic effects. Combined experimental and theoretical results highlight the role of cooperative MoO₆-TeO₃distortions and framework connectivity in governing optical anisotropy in Mo-Te-O oxides.
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PubMed
高影响因子
Energy Technology
·
2023
·Vol. 11
·期 8
·2300118
·
IF 3.8
Peiyao Pan,Qingle Zeng,Xiaoxiao Li,Chao Liu,Jinming Zeng,Tongxiang Liang,Xiaopeng Qi
Electrocatalytic water splitting provides an effective way to store electrical energy (i.e., solar and wind energy) intermittently. It is believed that developing electrocatalysts with excellent stability, high catalytic efficiency, and abundant natural reserves is the key to the industrialization of electrochemical water splitting. Herein, nickel–molybdenum electrocatalyst formed on the surface of a low-cost etched stainless-steel mesh via a one-step electrodeposition method exhibits a low hydrogen evolution overpotential of 53 mV and oxygen evolution overpotential of 261 mV at a current density of 10 mA cm −2 due to the synergistic effect of nickel and molybdenum. Moreover, the as-prepared catalyst demonstrates superior hydrogen evolution reaction (HER) catalytic performance than commercial Pt/C at current density exceed 200 mA cm −2 . The electrocatalyst also shows excellent HER and oxygen evolution reaction stabilities at high current density attribute to the tightly bond between electrocatalyst and the etched stainless-steel mesh, as well as the surface reconstruction of catalyst during the cycle test. The facile electrodeposition method has lower requirements on production equipment, using stainless steel mesh as the basement reduces the production cost, the nickel–molybdenum alloy possesses excellent electrolytic water splitting performance and stability. These results indicate that this work can provide an idea for the industrialization of electrochemical water splitting.
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Nano Research
·
2023
·
IF 9.9
Wang Yaya,Wen Yunzhou,Cheng Yumeng,Chen Xinhong,Zhuansun Mengjiao,Wang Tongbao,Li Jun,Meira Debora,Sun Huarui,Wei Jun,Zhou Jia,Wang Yuhang,He Sisi
The polymer electrolyte membrane (PEM) electrolyzers are burdened with costly iridium (Ir)-based catalysts and high operation overpotentials for the oxygen evolution reaction (OER). The development of earth-abundant, highly active, and durable electrocatalysts to replace Ir is a critical step in reducing the cost of green hydrogen production. Here we develop a Ru 5 Mo 4 O x binary oxide catalyst that exhibits high activity and stability in acidic OER. The electron-withdrawing property of Mo enriches the electrophilic surface oxygen species, which promotes acidic OER to proceed via the adsorbate evolution pathway. As a result, we achieve a 189 mV overpotential at 10 mA·cm −2 and a Tafel slope of 48.8 mV·dec −1 . Our catalyst demonstrates a substantial 18-fold increase in intrinsic activity, as evaluated by turnover frequency, compared to commercially available RuO 2 and IrO 2 catalysts. Moreover, we report a stable OER operation at 10 mA·cm −2 for 100 h with a low degradation rate of 2.05 mV·h −1 .
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Materials Today Chemistry
·
2022
·
IF 7.613
Y. Qu,L. Sun,F. Xie,J. Hu,H. Tan,J. Qian,X. Shi,Y. Zhang
A major challenge faced by NiS as positive electrode material for supercapacitors is the capacity attenuation caused by structural changes in the charging and discharging process. In this article, based on theoretical calculations and experimental studies, it is demonstrated that Mo doping can significantly improve the stability and specific capacitance of NiS for supercapacitor application. Experiments show that compared with original NiS/C, the cycle stability of the doped Mo-NiS/C increases by about 30% after 5,000 cycles, and the specific capacitance achieves 1,852 F/g at 1 A/g. Besides, Mo doping can bring better ion contact and increased reaction site to the original lamellar structure of NiS. The calculation results also show that the bond energy of the doped Mo-NiS/C is lower than that of the original NiS/C, which hinders the structural transformation or other side reactions and achieves a better cycle life. This article verifies the effect of Mo doping on the properties of NiS/C and provides a feasible scheme for the study of metal-doped sulfide.
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CHEMOSPHERE
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2022
·
IF 8.943
Yi Zhou,Jun Ma,Jianhong Yang,Zhicheng Lv,Zhiyong Song,Heyou Han
With the wide application of nanomaterials (NMs) in agriculture, it is particularly important to assess the impact of these NMs on soil microorganisms . In this study, different varieties of soybean rhizosphere microorganisms (RM) were employed to simulate the alleviate effect of molybdenum nanoparticles (Mo NPs) induced stress in presence of soybean plants. Mo NPs caused serious toxic effects on soybean growth and nitrogen fixation at a concentration of 100 mg kg −1 : plant height and biomass were reduced by 56.4% and 82.8%, respectively, and the ability to fix nitrogen was almostly lost. However, after adding different varieties of soybean RM ( RM-Williams 82 , RM-Youchun 1204 , and RM-Zhongdou 41 ), the stress caused by high concentrations of Mo NPs on soybean plants was significantly reduced. The plant height, root length, biomass, and nitrogen fixation ability were improved by 70.8%, 80.7%, 145.8%, and 349.8%, respectively, following the addition of soybean RM-Williams 82 . High-throughput sequencing revealed that Mo NPs treatment affected the microbial community structure. Among them, Flavisolibacter and Caulobacter genera abundance increased significantly, which might be the key factor in relieving Mo NPs-induced stress on soybean growth. These findings suggest a novel mode of RM as a promising strategy to prevent deleterious effects of stress with NPs on plants in the future.
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PubMed
高影响因子
FUEL
·
2022
·
IF 8.035
Mingqiang Chen,Wei Dai,Yishuang Wang,Zhiyuan Tang,Hong Li,Chang Li,Zhonglian Yang,Jun Wang
Lignin catalytic depolymerization (LCD) into liquid fuels and aromatic chemicals in supercritical ethanol systems is one of the most effective strategies for efficient utilization of biomass resources. In this study, a series of sepiolite (SEP) supported Mo-Mn catalysts with different Mn/Mo ratios were prepared and applied to LCD. Experimental results for lignin and 2-phenoxy-1-phenyl ethanol (PP) confirmed that Mo/Mn species promoted the breakage of β-O-4 bonds, Mn additive effectively inhibited the alkylation of intermediates, and Mn/Mo ratios distinctly affected the yields of lignin oil (LO) and guaiacols. All as-prepared Mn-Mo/SEP catalysts achieved approximately 100 % conversions of lignin and PP. Various characterization results demonstrated that Mn/Mo ratios could regulate the particle sizes of metal oxides as well as the concentration of oxygen vacancies (O V ) and surface acidic sites. In 3Mn1Mo/SEP, the appropriate interaction among SEP , Mn and Mo species reduced the particle sizes of metal oxides and rendered the crystalline phase structure in a relatively complex state, which undoubtedly generated massive steps/corners on its surface and then enhanced the hydrogenation reaction. Furthermore, the 3Mn1Mo/SEP contained many O V and suitable distribution of Lewis and Brønsted acid sites, which facilitated the adsorption of oxygen-containing intermediates and further hydrogenation and deoxygenation. Therefore, 3Mn1Mo/SEP achieved 45.7 % of LO yield with an HHV of 32.31 MJ/Kg and the highest selectivity to phenols (85.61 %) and yield of guaiacols (308.9 mg/g lignin). In addition, the plausible reaction network for LCD was proposed based on the results of experiments and characterizations.
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高影响因子
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
·
2022
·
IF 6.044
Dezhi Wang,Dongyang He,Kai Li,Zhuangzhi Wu
The strength enhancement is critical for the application exploration of Mo-based materials. In this work, a secondary phase of WC is introduced into the Mo matrix, and the corresponding phase, microstructure and mechanical properties have been studied. It is found that the addition of WC particles can significantly improve the mechanical properties, leading to a high ultimate tensile strength (UTS) of 591.5 MPa and a hardness of 242.7 HV over the sintered Mo–12%WC composite, which are about 21.2% and 49.5% higher than those of pure Mo, respectively. During the sintering, the additive WC particles react with the Mo matrix to in-situ generate W and Mo 2 C, and the former is dissolved into the Mo matrix to exhibit solid solution strengthening. Besides, the latter hinders the migration of grain boundaries (GBs) to limit the grain growth of Mo, resulting in smaller grain size. More importantly, the Mo 2 C ( 1 ‾ 2 ‾ 1 ) can gain coherent interfaces with Mo ( 1 1 ‾ 0) to intensify the phase boundary. This work paves a way for the design of high-performance composites through the in-situ reinforcement of decomposable additives.
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CATALYSIS LETTERS
·
2022
·Vol. 153
·期 2
·1-11
·
IF 2.936
Jilei Liang,Mengmeng Wu,Nianqing Zhu,Xinxing Gao,Guanxing Zhu,Tingting Huang,Yunqi Liu,Chenguang Liu
With the help of hydrogen bonding and π⋯π stacking, the small molecular clusters in the impregnating solution was induced to self-assemble and form a new Ni–Mo polyoxometalate based on octamolybdate with a molecular formula of [Ni(pyz) 6 ] [Mo 8 O 26 (pyz) 2 ]⋅10H 2 O (pyz = pyrazole). The polyoxometalate was structurally characterized detailed by various technologies, and its sulfide was also characterized to make a preliminary study to explore the use of it as a potential NiMoS active phase precursor. Much more NiMoS active phase and higher catalytic activity of the Ni–Mo sulfided catalyst was found, and the structure-directing effects can account for the phenomenon. The results show the Ni–Mo polyoxometalate [Ni(pyz) 6 ] [Mo 8 O 26 (pyz) 2 ]⋅10H 2 O can make a superior precursor to prepare the hydrodesulfurization catalyst, and it provides a new preparation methodology to the rational design and controllable preparation of superior hydrodesulfurization catalysts. Graphical Abstract
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高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Qian Qi,Wei Ji,Qiunan Li,Wanjun Li,Jinyong Zhang,Weimin Wang,Zhengyi Fu
The materials used in astronautics fields are usually designed to withstand severe thermal stress induced by large temperature differences. Compared with homogenous materials, functionally graded materials (FGM) possess gradient properties and can be applied in harsh operating conditions. In this study, ZrC–Mo multilayer FGM were designed and prepared with three gradient compositions. The as-produced ZrC–Mo FGM exhibited the dense and homogeneous morphology and excellent interlayer bonding without visible defects such as cracks and pores. The results of oxyacetylene ablation tests indicated that compared with homogeneous ZrC-based composites, the ZrC–Mo FGM could better maintain integrity and avoid catastrophic damage. An effective property transition was established by the gradient design, which could relieve the stress caused by the difference in thermal expansion coefficient between ceramic and metal materials. The FGM in the composition of quadratic function nonlinear with higher Mo content show the optimized overall performance. The study provides a new strategy for developing promising candidate materials under ultra-high temperature conditions.
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危险品化学品经营许可证（带存储）