CHINESE JOURNAL OF CATALYSIS
·
2021
·
IF 8.271
Xue Chen,Ming-Yu Qi,Yue-Hua Li,Zi-Rong Tang,Yi-Jun Xu
The fabrication of efficient catalysts to reduce nitrogen (N 2 ) to ammonia (NH 3 ) is a significant challenge for artificial N 2 fixation under mild conditions. In this work, we demonstrated that the simultaneous introduction of oxygen vacancies (OVs) and Mo dopants into Bi 5 O 7 Br nanosheets can significantly increase the activity for photocatalytic N 2 fixation. The 1 mol% Mo-doped Bi 5 O 7 Br nanosheets exhibited an optimal NH 3 generation rate of 122.9 μmol g −1 h −1 and durable stability, which is attributed to their optimized conduction band position, suitable absorption edge, large number of light-switchable OVs, and improved charge carrier separation. This work provides a promising approach to design photocatalysts with light-switchable OVs for N 2 reduction to NH 3 under mild conditions, highlighting the wide application scope of nanostructured BiOBr-based photocatalysts as effective N 2 fixation systems.
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SUPERCONDUCTOR SCIENCE & TECHNOLOGY
·
2025
·Vol. 38
·期 7
·075014
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IF 4.2
Manikandan Krishnan,Jiaojiao Meng,Bai-zhuo Li,Yanmei Ma,Cao Wang,Dilip Bhoi,Yoshiya Uwatoko,Qiang Jing,Bo Liu
Structural, superconducting ground state, and normal state properties on Re-Os-W-Mo-Ta high-entropy alloys (HEAs) were investigated using powder x-ray diffraction, magnetization measurements, electrical resistivity analysis, and specific heat measurements. The structural phase transformation was found to develop through compositional variations of the primary elements of HEAs, leading to the formation of phases such as bcc-type Re23Os5W33Mo34Ta5, σ-type Re31Os18W23Mo23Ta5, and α-Mn-type Re33Os34W11Mo11Ta11. These impurity-free samples, displaying a single-phase structure, exhibit bulk superconducting behavior. Low-temperature specific heat analysis indicates that the bcc-type and σ-type HEAs exhibit weakly coupled, whereas the α-Mn-type HEA exhibits strongly coupled, isotropic and fully gapped superconductivity. Moreover, the stability of bcc-type, σ-type, and α-Mn-type HEAs is significantly influenced by key factors such as valence electron count and electronegativity differences. This study presents observations of structural transformations in HEAs driven by compositional variations without the introduction of additional elements, providing significant insights into the correlation between structural changes and superconducting properties in highly disordered systems.
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Small
·
2025
·
IF 12.1
Hongji Chen,Yue Mao,Zihao Ji,Ho Ngoc Nam,Quan Manh Phung,Hongfei Yin,Shuo Liu,Chunyu Yuan,Xiang Li,Dongdong Xiao,Yusuke Asakura,Yongzheng Zhang,Yusuke Yamauchi
Enhancing the activation efficiency of peroxymonosulfate (PMS) to generate more reactive oxygen species (ROS) is crucial for improving the catalytic performance of Fenton-like reactions. Strategies on the regulation of active sites and the enhancement of interfacial electron transfer from catalysts to PMS have become central to achieving effective PMS activation in Fenton-like catalysis. In this work, single-atom M-doped sulfur vacancies (S v )-MoS 2 (M = Co, Mn, Ni, Cu, and Zn) catalysts with atomic-level asymmetric M-S V -Mo sites are proposed for efficient PMS activation and the degradation of organic pollutants. Among these catalysts, the Co-S V -MoS 2 exhibited excellent catalytic activity and stability, resulting in a removal efficiency of ≈100% for Rhodamine B (RhB) within just 6 min. Density functional theory (DFT) calculations revealed the construction of asymmetric Co-S V -Mo sites effectively enhanced the electron density near the Fermi level, facilitated more electron transfer to PMS as well as lengthened the O–O bond of PMS, thereby significantly promoting the generation of ROS. This work provides a strategy for regulating atomic-level active sites and a novel perspective for developing advanced Fenton-like catalysts.
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Xiaohua Wang,Yanwei Li,Guang Sun,Jianliang Cao,Yan Wang
The pressing demand for environmental and health safeguarding has spurred intense enthusiasm among researchers to delve into metal oxide semiconductors (MOSs) based gas sensors. Particularly, the accurate detection of trace hydrogen sulfide (H₂S), which has drawn growing attention, has become a focal point. Herein, a molybdenum (Mo) doping strategy was presented to enhance the H₂S-sensitive properties of In₂O₃ nanomaterials to detect the presence of 1 ppm H₂S at comparatively lower temperatures. The Mo-doped In₂O₃ cubic nanoparticles (Mo-In₂O₃ CNPs) were synthesized through a hydrothermal route using In(OH) 3 as a precursor. When used as a sensitive material for the detection of H₂S, the Mo–In₂O₃ CNPs have shown some impressive improvements compared to pure In₂O₃ counterparts, including a reduction in working temperature (240 °C vs 300 °C), an increase in sensitivity (18.46 vs 11.34 for 20 ppm H₂S), a better selectivity (6.2 vs 2.84 times to ethanol), and a lower limit of detection (0.79 vs 0.47 ppm). Even to 1 ppm H₂S, the Mo-In₂O₃ sensor can give a response of 2.18, signifying its application feasibility in detecting trace amounts of H₂S. The multiple sensitization effects and their potential mechanism of Mo-In₂O₃ CNPs were discussed in detail.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Qiyuexin Wang,Hanyu Li,Huan Li,Xueying Yang,Fangcheng Qiu,Dacheng Zhou,Zhengwen Yang,Xin Zhen,Jianbei Qiu
The implementation of liquid organic hydrogen carriers (LOHCs) is constrained by the high energy consumption and strong dependence on precious‑metal catalysts in conventional thermal processes. This work develops a fluorine-doped Mo-Ni-F/NF bifunctional electrode through a simple electrochemical deposition-sintering method for efficient electrochemical hydrogen storage using quinoxaline under ambient conditions. XRD and TEM characterization revealed a unique structure comprising a MoNi₄ shell with embedded Ni nanoparticles, while SEM and EDS mapping confirmed uniform fluoride distribution and enhanced surface morphology. XPS analysis indicated that fluoride modification improved surface characteristics without altering chemical states. The catalyst demonstrates exceptional performance in reversible quinoxaline hydrogenation (92.1 % conversion after 5 h, 95.6 % FE) and dehydrogenation (100 % conversion after 4 h, 97.2 % FE). DFT calculations showed that electron transfer between MoNi₄ and nickel nanoparticles enhanced catalytic activity, while fluorine modulation reduced the adsorption energy of quinoxaline on nickel (111) from −2.84 eV to −0.55 eV, and tetrahydroquinoxaline from −2.08 eV to −0.84 eV, mitigating catalyst poisoning. In situ Raman spectroscopy identified dynamically formed NiOOH as the active phase, which facilitates proton-coupled dehydrogenation via -OH/μ-O-Ni intermediates. This work provides novel catalytic materials and mechanistic insights for the development of low-cost, room-temperature, and highly effective electrochemical LOHC systems.
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高影响因子
Crystals
·
2026
·Vol. 16
·期 1
·51
·
IF 2.4
Xi Shi,Shiyuan Zhu,Qiongyu Zhou,Bo Liang,Jun Li,Guangji Li,Longquan Chen,Peijun Xu
Ni-Mo alloy coating has shown exciting potential as a candidate to replace chromium coating. In this paper, Ni-Mo alloy coatings were successfully electrodeposited from a citrate/ammonia bath, and the effect of the bath pH values over a wide range (4–10) on the characteristics and corrosion resistance of Ni-Mo alloy coating was studied in detail. Results show that all the deposited Ni-Mo alloy coatings consist of a crystalline solid-solution Ni(Mo) fcc structure. An increase in bath pH values could facilitate the deposition of Mo, thereby increasing the Mo content and decreasing the crystallite size of Ni-Mo alloy coatings. However, there are subtle gaps between the coarse grains on the surface of the Ni-Mo alloy coating deposited at pH 10. These subtle gaps tend to form between the coarse grains on the surface of the electrodeposited Ni-Mo alloy coating because of the relatively high Mo content, refined grains, and appropriate morphology. The Ni-Mo alloy coating deposited at pH 9 exhibits optimal corrosion resistance, attributed to its lowest corrosion current densityicorr(7.31 × 10−6A cm−2), the strongest polarization resistance (11.13 kΩ·cm−2), and impedance value, which are mainly contributed to by the coating resistance and charge-transfer resistance.
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高影响因子
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
·
2026
·
IF 4.6
Tianrun Ma,Fengshun Du,Bohua Duan,Dezhi Wang,Zhuangzhi Wu,Xinli Liu
The development of novel Mo alloys that combine high strength and toughness has been a critical goal in the research community. A co-reinforced Mo alloy was prepared through powder metallurgy by adding partially stabilized zirconia (PSZ) and MAX phase Ti 3 AlC 2 to the Mo matrix. The influence of varying PSZ/Ti 3 AlC 2 ratios on the microstructure and mechanical properties of Mo alloys was thoroughly studied. The results indicate that as the PSZ/ Ti 3 AlC 2 ratio is increased, the density, elongation, and fracture toughness of sintered molybdenum alloys are enhanced, while their strength and hardness also show varying degrees of improvement. At a PSZ/Ti 3 AlC 2 ratio of 7:3, the prepared Mo alloy exhibits optimal comprehensive properties, with a relative density of 96.8%, a hardness of 193.1 Hv, a tensile strength of 537.4 MPa, an elongation of 21.69%, and a fracture toughness of 29.1 MPa·m 1/2 . The synergistic effect of PSZ and Ti 3 AlC 2 optimizes the alloy's microstructure and enhances its overall performance through multiple mechanisms. PSZ has a more pronounced effect on the ductility, whereas Ti 3 AlC 2 plays a more significant role in enhancing the strength. The findings provide a new strategy for the preparation of high-performance molybdenum alloys.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 13.2
Yaqi Cui,Zulpya Mahmut,Yangdong Xie,Fangyu Shi,Jiaqi Zhou,Yaqi Zhu,Ruilin Lou,Zhenzhou Wang,Lin Xu,Lin Wang,Biao Dong
Manipulating the “bacterial current” by targeting the electron transport chain (ETC) presents a transformative antibacterial strategy, yet achieving precise targeting and elucidating the molecular mechanism remain challenging. Here, we break through the synthetic bottleneck to engineer a robust, electron-donating nanomaterial for targeted bacterial ETC disruption. A novel in-situ sulfur-doping and vacancy-engineering strategy was employed to fabricate porous Mo(SO)₂ from MoS₂, which features abundant oxygen vacancies and expanded interlayer spacing. These vacancies serve as electron-deficient centers that facilitate a rapid and strong electron donation. By functionalizing with 4-mercaptophenylboronic acid (4-MPBA) for targeting, the electrons are specifically transferred to the bacterial ETC. We systematically unveil the molecular mechanism: the donated electrons suppress the expression of ubiC , a key chorismate lyase for ubiquinone synthesis, via interaction with the guanidyl group of Arg63. This disruption halts proton pumping and ATP synthesis, leading to bacterial death via energy depletion.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Yongjie Zhou,Cheng Liu,Xinlin Wei,Junxiao Liu,Liang Shi,Hao Li,Yuanxun Li,Huaiwu Zhang
In this study, BaZnP 2- x Mo x O 7+ x /2 (BZPM x , 0 ≤ x ≤ 0.03) ceramics were successfully sintered at low temperatures via the solid-state reaction. Rietveld refinement, surface morphology characterization, and Raman spectroscopy were employed to clarify the effects of Mo 6 + substitution on the crystallology and microstructure evolution of the BZPM x ceramics. Dielectric properties were evaluated in both microwave and terahertz frequencies. Optimal microwave dielectric properties were obtained at x = 0.02, sintered at 825 ℃ for 4 h: ε r = 8.073(±0.012), Q×f = 73,172(±1187) GHz (@13.687 GHz), and τ f = -31.9(±1.6) ppm/℃. Compared with the pure BaZnP 2 O 7 ceramic sintered at 875 ℃ ( Q×f = 47,984 GHz and τ f = −40.2 ppm/℃), the incorporation of Mo 6+ could reduce the dielectric loss and improve the thermal stability while reducing the sintering temperature simultaneously. In the terahertz frequency range of 0.2 ∼ 1.2 THz, the ε r values decreased to 5.35 ∼ 7.24 while the tan δ values were within the range of 0.0105 ∼ 0.0319. All experimental results indicated that the BZPM x ceramics are promising for LTCC devices in both microwave and terahertz frequencies.
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高影响因子
JOURNAL OF POWER SOURCES
·
2026
·
IF 8.4
Yuhan Wang,Yihao Qu,Min Yu,Ji Yang
Proton-exchange-membrane water electrolysers require active and stable anodic oxygen evolution catalysts. RuO 2 offers high intrinsic activity but dissolves rapidly in acid. Here, high-valence molybdenum is introduced into rutile RuO 2 to regulate the local Ru-O chemical and electronic environment. The sample labels Mo-x-RuO 2 refer to nominal Mo/(Mo + Ru) precursor ratios. XRD, EDS, XPS and DFT analyses support Mo incorporation within the rutile framework and reveal an altered local Ru/O chemical environment, providing insights into the electronic regulation induced by Mo incorporation. Mo-17-RuO 2 requires 207 mV at 10 mA cm −2 , with a Tafel slope of 56.2 mV dec −1 . After 75 h of acidic half-cell operation, it shows 6.64% cumulative Ru dissolution based on the nominal initial Ru loading. The commercial RuO 2 reference exhibited 27.95% cumulative Ru dissolution after approximately 17 h of operation. For the selected computational models, the AEM- and LOM-like pathways exhibit comparable thermodynamic limiting steps, with theoretical overpotentials of 275 and 262 mV, respectively, suggesting that Mo incorporation modulates oxygen reaction energetics without exclusively favoring a single pathway. These findings provide insight into composition-dependent Mo engineering for improving the performance and Ru retention of acidic OER catalysts.
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高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2020
·
IF 6.984
Xue Yu,Shuying Cheng,Qiong Yan,Junjie Fu,Hongjie Jia,Quanzhen Sun,Zhiyuan Yang,Sixin Wu
Cation substitution has an important impact on the power conversion efficiency (PCE) of Cu 2 ZnSn(S,Se) 4 (CZTSSe) solar cells. Herein, a significant PCE enhancement of flexible indium-doped CZTSSe solar cells has been achieved by partially substituting Sn 4+ with In 3+ . Systematic measurements indicate that In doping in CZTSSe film effectively improves the crystallinity and carrier concentration of the absorber layer . Meanwhile, the treatment reduces interface recombination and band tailing by passivating deep defects and increases the open-circuit voltage ( V oc ) of the solar cells. By physical analysis, the key parameters for the solar cell diode such as A , J 0 , R s and R sh are significantly improved after In-doping, indicating better PN junction quality. Under the optimal In-doping (x = In/(Sn + In) = 9%), the flexible Cu 2 ZnSn 1- x In x (S,Se) 4 solar cell has been successfully obtained with the best efficiency of 7.19% and the V oc enhancement of 62 mV due to reduced V oc deficit and band tailing.
研究领域:
材料科学
·
半导体物理
·
光伏技术
·
无机功能材料
·
能源材料
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高影响因子
Catalysis Science & Technology
·
2026
·
IF 4
Jian Yang,Fan Lin,Shaojie Lei,Zichen Li,Hui Zhang,Zhibao Huo,Dezhang Ren
The development of efficient and low-energy-consumption electrocatalytic decarboxylation (Kolbe electrolysis) is of great significance for the conversion of biomass-derived carboxylic acids into high-grade hydrocarbon fuels. RuO2 is considered a promising anode material. However, its intrinsic high activity towards the oxygen evolution reaction (OER) poses challenges in terms of reaction selectivity and high driving potentials in practical applications. This study investigated the modulation of RuO2 electrode performance through the systematic screening of various metal dopants (Mo, Ta, Zr, W, Sn). Results show that while doping generally enhances OER, certain dopants sustain decarboxylation under high potentials by suppressing OER via hydrocarbon product coverage. Among them, the Mo-doped RuO2 coating improved decarboxylation selectivity and Faradaic efficiency to some extent while facilitating product desorption to inhibit interface resistance increase. By further optimizing the doping ratio and calcination temperature, the resulting RuO2-5%Mo anode achieved a remarkable reduction in cell voltage (by approximately 1 V) in the presence of OA during constant-current electrolysis, leading to a ~20% decrease in energy consumption per unit product compared to undoped RuO2, alongside good stability over 10 cycles. This work provides new material design strategies and mechanistic insights for developing Kolbe electrolysis anodes with high selectivity and low energy consumption.
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