JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Xin Tang,Ruipeng Mao,Fan Zhang,Yongzhong Jin,Wei Su,Wu Jiang,Junhao Wang
Cemented carbides play a pivotal role in diverse industrial sectors, and controlling abnormal grain growth and regulating the homogeneity of the Co binder phase are the key challenges to improve their properties. In this study, WC-10Co alloy was prepared for the first time by low-pressure sintering technique using (Ti, Cr, V, Nb, Mo)(C, N) high entropy powder as an inhibitor, focusing on the effect of trace additions of (Ti, Cr, V, Nb, Mo)(C, N) on the microstructure and mechanical properties of the alloy as well as friction and wear properties. The results show that under the conditions of sintering at 1420 ℃, a pressure of 3 MPa, and a holding time of 1 hour, the alloy with 0.2 wt.% high-entropy inhibitor exhibited the best comprehensive properties, with a flexural strength of 3752 MPa, a Vickers hardness of 1679 HV 30 , and a fracture toughness of 13.07 MPa·m 1/2 . During the stable stage of tribological testing, the average friction coefficient reached 0.6195, and the wear rate was as low as 1.34×10 -7 mm 3 /(N·m). The toughening and strengthening mechanism of the (Ti, Cr, V, Nb, Mo)(C, N) - modified alloy is mainly attributed to the significant refinement of WC grains, WC lattice contraction, and the formation of Co-based solid solutions by the high-entropy inhibitor. However, excessive addition deteriorates the overall performance. This study provides experimental data and technical insights for the development of a new generation of cemented carbides with high strength, high toughness, and excellent wear resistance.
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高影响因子
ADVANCED FUNCTIONAL MATERIALS
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2025
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IF 19
Yuxuan Xie,Xinyu Yang,Zhao Li,Ziruo Zeng,Shuangyou Bao,Xin Sun,Yixing Ma,Kunlin Li,Chi Wang,Fei Wang,Ping Ning,Kai Li
High-electron-density Pt 0 nanoparticles (NPs) with excellent hydrogen activation and spillover capacity offer unique advantages in volatile organic sulfur selective hydrogenation reactions. Taking advantage of the more preferential and effective anchoring of Mo atoms at the γ-Al 2 O 3 terminal hydroxyl (OH) groups and its electron modification role, competitive anchoring is induced by a simple co-impregnation synthesis method to promote the agglomeration of low-loading Pt atoms into high concentrations of electron-rich and enlarged Pt NPs, which resulted in a substantial increase in the active centers for hydrogen dissociation. The Mo doping amount with the best Pt aggregation efficiency is 3 wt.%, and the hydrogen spillover efficiency of 1Pt3Mocom/Al catalyst is significantly higher than that of 1Pt/Al catalyst, which efficiently convert carbon disulfide (CS 2 ) (95%–100%) while maintaining a methanethiol (CH 3 SH) selectivity of 85% at 250 °C or a methane (CH 4 ) selectivity of 92% at 310 °C in the 24 h long-term test. In situ DRIFTS revealed that the improved catalyst performance is due to the elevated capacity to generate the intermediates HCSS * , CH 2 S * , and CH 3 S * . The 1Pt3Mocom/Al catalyst synthesized by competitive anchoring strategy greatly reduces the Pt consumption and is instructive for the exploitation of low-cost Pt NPs active centers.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2025
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IF 21.1
Yanan Huang,Yan Zhao,Dawei Song,Yaqin Shi,Huan Chen,Bo Niu,Donghui Long,Yayun Zhang
This study uncovers a synergistic Fe-Mo dual-atom catalytic mechanism that enhances peroxymonosulfate (PMS) activation and pollutant degradation through dynamic electron management and substrate pre-activation. A nitrogen-doped carbon-supported FeMo dual-atom catalyst (FeMo/NC) was synthesized and systematically analyzed using XAFS, in situ Raman, DFT calculations, and electrochemical tests. The FeMo/NC-PMS system achieved 99 % ciprofloxacin (CIP) degradation within 10 minutes (rate constant: 0.402 min −1 ), maintained > 90 % efficiency across pH 1–13, and exhibited minimal Fe/Mo leaching (<0.1 ppm) with 90 % retention after five cycles. Mechanistic studies revealed that Mo stabilizes Fe valence states via electron transfer, strengthens Fe-N coordination, and promotes pollutant pre-activation on Mo sites while enabling selective 1 O 2 generation at Fe sites. This work establishes a dual-atom design strategy to optimize electron redistribution and interfacial interactions in Fenton-like systems. The demonstrated compatibility with membrane filtration (100 % CIP removal in wastewater) highlights its potential for practical water remediation applications.
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高影响因子
Small
·
2025
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IF 12.1
Yan Jia,Xiao Ma,Yi-Bin Yang,Rui Chao,Ji-Kai Li,Peng-Fei Guo,Bing Zhu,Qian-Nan Yang,Wei-Tao Wang,Lu Liu,Zhao-Tie Liu,Yang Yang
Real-time visualization of alloying evolution is crucial yet challenging for designing and synthesizing face-centered cubic (fcc) nanoalloy catalysts for the alkaline oxygen evolution reaction (OER). Here, a trimetallic fcc NiFeMo nanoalloy is synthesized via topological reduction of NiFeMo layered double hydroxide (LDH) under an Ar/H 2 atmosphere. In situ heating transmission electron microscopy reveals the transforamtion of non-hexagonal NiFeMo LDH nanosheets into irregular inverse-spinel Ni 1-x Mo x Fe 2 O 4 nanoparticles, eventually forming spherical fcc NiFeMo nanoalloy particles. Furthermore, the NiFeMo nanoalloy demonstrates a Faradaic efficiency of 99.3% and superior intrinsic OER activity compared to NiFe and Ni nanoalloys at a consistent mass loading, due to synergistic metal interactions. The NiFeMo nanoalloy-modified nickel foam electrode exhibits excellent electrochemical stability, with structural and elemental analyses confirming that the original fcc structure remains intact after long-term OER testing. Operando differential electrochemical mass spectrometry coupled with isotope labelling experiment illustrates that the OER on NiFeMo nanoalloy proceeds via an adsorbate evolution mechanism pathway. Theoretical calculations suggest that Mo species reduce the potential barriers for *OH intermediate formation, thereby enhancing the inherent activity of Ni active sites in the NiFeMo nanoalloy. This work presents a novel approach for developing advanced trimetallic and high-entropy nanoalloy OER catalysts.
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PubMed
高影响因子
DALTON TRANSACTIONS
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2017
·Vol. 46
·期 20
·6776-6784
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IF 4.029
G. Q. Wang,X. H. Gong,Y. J. Chen,J. H. Huang,Y. F. Lin,Z. D. Luo,Y. D. Huang
Two novel red phosphors KBaEu(XO4)3 (X = Mo, W) have been synthesized by high-temperature solid-state reactions and the crystal structures were determined for the first time. Single-crystal X-ray diffraction data reveal that their space groups are C2/c. The crystalline structure is constituted of K/BaO8 distorted square antiprisms and distorted EuO8 polyhedra which form chains lying along the c-axis and two kinds of distorted XO4 tetrahedra. This high disorder of K/Ba which might lower the crystal field symmetry around Eu3+ results in the high purity of red emission around 615 nm originating from 5D0 → 7F2 transition under near-ultraviolet (NUV) excitation. With increasing temperature, the luminescence of KBaEu(XO4)3 (X = Mo, W) phosphors decreases almost linearly with subtle alteration for the CIE coordinate. As the temperature reaches 550 K, the red emission intensity decreases to 37.3% and 50.7% of that at 300 K for KBaEu(MoO4)3 and KBaEu(WO4)3, respectively. The analysis of the decay curves of the 5D0 → 7F2 emission at variable temperatures indicates the weak cross relaxation and non-radiative energy transfer between Eu3+ ions. These results demonstrate that the investigated phosphors are attractive for application in high power NUV excited white LEDs.
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高影响因子
CERAMICS INTERNATIONAL
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2026
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IF 6
Fucheng Liu,Yuhui Chen,Lei Zhuang,Hui Wang,Hulei Yu,Yanhui Chu
High-temperature materials with superior long-term oxidation resistance above 2000 °C are urgently sought for next-generation hypersonic vehicles. Here, (W 0.28 Ta 0.28 Mo 0.28 Cr 0.15 )(Al 0.2 Si 0.8 ) 2 -Al 2 O 3 dual-phase high-entropy alumino-silicides (HEAS-Al 2 O 3 ) are developed, which exhibit superior long-term oxidation resistance up to 2100 °C. To be specific, the as-fabricated HEAS-Al 2 O 3 samples are found to consistently follow an oxygen-diffusion parabolic law across 1700–2100 °C, possessing a high activation energy of 234.4 kJ mol −1 . Moreover, an ultralow oxidation depth of 0.4 mm after 120 min of laser oxidation and a linear plasma ablation rate of 0.026 μm s −1 at 2100 °C are achieved. Such remarkable oxidation resistance is mainly attributed to the increase in Al cations due to Al 2 O 3 incorporation, coupled with the inclusion of multiple cationic elements, to significantly enhance the rigidity of the glass network. Thereby, the viscosity and high-temperature stability of the resulting aluminosilicate glass are markedly improved, effectively protecting the underlying unoxidized HEAS-Al 2 O 3 . The as-developed HEAS-Al 2 O 3 shows great promise as a thermal structural candidate for next-generation hypersonic vehicles.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2026
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IF 5.4
Minghong Dai,Yafang Chen,Peng Wang,Dianming Chu,Zhaoying Li,Wenjuan Bai,Yan He
Coalescence induced by the dynamic evolution of catalysts under catalytic environments has long been a challenge in the growth of carbon nanotubes (CNTs). Herein, this study reports a catalyst "hijacking" strategy, which leverages the time-dependent difference during the crystalline-to-amorphous transformation of catalysts to activate the catalytic activity of small-sized crystalline nanoparticles, preventing their coarsening via Ostwald ripening. Simultaneously, the retained nanoparticles exhibit higher density and optimized electronic structures, extending the catalytic lifetime. The successful synthesis of the catalyst relies on the efficient utilization of Mo in open cavities, where the isolated open cavities restrict excessive coalescence of the active components, and the doping of Mo atoms induces the transformation of the active components from amorphous to crystalline. In this structure, the semi-confined space, surface negative charge, and affinity to solvents facilitate the formation of small-sized NPs by isolating and dispersing metal ions. Meanwhile, Fe-Mo bonds significantly prolong the length of CNTs. The combination of Fe and Mo promotes gradual crystallization of NPs, suppresses excessive coalescence of the active components, and optimizes the adsorption energy of C 3 H 6 , thereby extending the catalyst lifetime. Additionally, the bonding between Mo and C atoms favors bulk diffusion of C within Fe NPs, avoiding excessive C deposition inside the NPs and enhancing structural stability. As a result, the CNTs grown with this catalyst exhibit a small tube diameter as low as 5.68 nm and a high ratio (M product /M catalyst ≈14), demonstrating promising application prospects. Download: Download high-res image (212KB) Download: Download full-size image
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2026
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IF 19.7
Bo Shen,Yuxin Hui,Qi Wang,Fei Wang,Derek Hao,Huayue Zhu,Liguo Shen,Hao Du
Photocatalytic three-electron oxygen reduction (3e - ORR) can convert dissolved O 2 into •OH via coupled 2e - /1e - steps, bypassing external H 2 O 2 dosing and the kinetic bottleneck of conventional photo-self-Fenton (PSF) systems. Here, Fe-substituted phosphomolybdate clusters (FePMo) are anchored on a biomass-derived hierarchical tubular carbon (HTCC) to form an HTCC/FePMo heterojunction (HFe) that drives a visible-light self-Fenton process. For tetracycline (TC, 10 mg L −1 ), HFe achieves 99 % removal within 120 min at unadjusted pH 0 = 5.8 ( k obs = 0.026 min −1 ) and 3.6–7.7-fold higher mineralization than either component, while retaining high activity from pH 3–9 and in saline water, natural surface water, and secondary effluent. In a continuous-flow reactor, an HFe/PVDF membrane (0.64 mg cm −2 loading; 2 mL min −1 , HRT 1.23 min) sustains > 90 % TC removal for 120 h. Ecotoxicity is alleviated, with inhibition-zone diameters shrinking from ∼2.3 to ∼0.8 cm ( S. aureus ) and from ∼1.25 to ∼0.7 cm ( E. coli ), and wheat-leaf Fv/Fm recovering to ∼0.73, comparable to the water control. The energy demand is low (EE/O = 0.0031 kWh L −1 ; EE/M = 0.31 kWh g −1 ), supporting a scalable, sustainable route for advanced treatment of refractory wastewater.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2023
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IF 15.1
Yuhao Chen,Kaihang Yue,Jia-Wei Zhao,Zhengyang Cai,Xianying Wang,Ya Yan
Constructing low-cost, high-active and robust heterogeneous hydrogen evolution reaction (HER) electrocatalysts with strong metal–metal oxide-support interaction (SMMOSI) is still an urgent challenge for the development of anion exchange membrane water electrolysis (AEMWE), especially under high current density (e.g., 1 A cm −2 ). Herein, a hierarchical composite of heterogenous Ni 4 Mo/NiMoO 4 (NiMoO x ) nanoparticles (NPs) anchored on a mesoporous carbon CMK-3 (NiMoO x @CMK-3) is designed as a superior electrocatalyst for HER. Significantly, the strong interaction between heterogeneous NiMoO x NPs and CMK-3 supporting matrix effectively stabilize the catalytic active Ni 4 Mo/NiMoO 4 heterostructure by altering the local geometric and electronic structures, leading to maximumly exposure of active sites and promoted electron transfer ability. The optimized electrocatalyst exhibits outstanding HER activity with an extremely low overpotential and Tafel slope of 7 mV@10 mA cm −2 and 27.7 mV dec -1 , respectively, and can steadily operate at 100 mA cm −2 for 800 h. More significantly, owing to these HER merits, the AEMWE configuration with NiMoO x @CMK-3 (−) is also designed, resulting in low cell voltage of 1.965 V@1 A cm −2 and negligible degradation over 400 h@1 A cm −2 . Further ex/in-situ electrochemical spectra evidence that both the partial combined MoO 4 2- from NiMoO 4 and the newly formed MoO 4 2- originating from dissolved Mo in NiMoO x @CMK-3 could boost the fast generation of polymerized Mo 2 O 7 2- that could effectively accelerate the HER process in alkaline conditions by facilitating the formation of active Mo-H* intermediates. Moreover, theoretical calculation results demonstrate the upshifting of d-band center of Mo toward Fermi level for the heterogeneous NiMoO x and the strong charge distribution between the heterointerface could optimize adsorption free energies of H* (ΔG H* ) on the surface of Mo atoms.
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2023
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IF 22.1
Xinhui Zhang,Aiping Wu,Dongxu Wang,Yanqing Jiao,Haijing Yan,Chengxu Jin,Ying Xie,Chungui Tian
The easily coupled HER and OER catalysts are highly desired for the hydrogen evolution by overall water splitting. Here, we design and synthesize Co-Mo based catalysts with adjustable electronic structure by tuning the Mo/Co ratio to give easily coupled, effective HER/OER catalysts. At lower Mo/Co ratio, the Mo component can move up the d-band center of the catalysts, rendering an enhanced capability of activating H 2 O to improve OER performance with a low overpotential of 223 mV at 10 mA cm −2 (η 10 ). Contrastingly, the Co component in the catalyst with higher Mo/Co ratio can induce the downward shift of the d-band center, optimizing the Gibbs free energy of hydrogen adsorption to enhance the HER activity (a low η 10 of 52 mV). These HER and OER catalysts with similar components can be coupled for overall water splitting. The electrolyzer can be driven by a solar panel to achieve effective H 2 production.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
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IF 15.1
Junwei Liao,Zhonghai Liu,Yongjun Ling,Qian Zhang,Songbai Qiu,Juwen Gu,Jiajin Li,Huafeng Dong,Jinliang Song,Tiejun Wang
Direct upgrading of aqueous bio-ethanol into higher alcohols is an emerging and highly attractive protocol to produce bio-fuels. However, it remains a great challenge to achieve high yield and selectivity of long-carbon chain higher alcohols, especially for C 8+ alcohols. Herein, the carbon encapsulated NiMo catalysts were designed and fabricated for direct upgrading of aqueous bio-ethanol. The NiMo@C catalyst with Ni/Mo ratio of 6/1 exhibited excellent performance with 89.4 % of bio-ethanol conversion and 42.1C-mol% of higher alcohols yield. The selectivity of C 8-16 products reached 44.7 %, which can be directly hydrodeoxygenated to produce bio-jet fuels. Characterization and DFT calculation results revealed that the doping of Mo tuned the electronic state of Ni and modified the surface properties ( i.e. , hydrophilicity, lipophilicity, and [OH] − adsorption), which enhanced the interaction of active site (NiMo-[OH] − ) with intermediate aldehyde in the oil phase and promoted secondary upgrading reaction to form C 8-16 alcohols. This work provides a promising approach to produce bio-jet fuels by direct upgrading of biomass fermentation ethanol.
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高影响因子
SOLID STATE SCIENCES
·
2022
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IF 3.752
Shijun Xu,Yi He,Siming Yan,Teng He,Hongjie Li,Xiao Guo,Yi Fan
Hydrogen energy is the most promising clean energy at present and hydrogen production by electrocatalytic water splitting is the frontier technology of alternative energy in the future. Herein, the Ni–Mo alloy supported with nickel foam (NF) was prepared by hydrogen reduction strategy at high temperature. The catalytic activity and stability of NiMo@NF-x catalyst (x stands for temperature) with multistage (sheet/particle) array structure were studied under different temperatures. The performance of the catalyst was evaluated by contact angle and related electrochemical characterization. It was found that the surface of NiMo@NF-550 catalyst prepared at 550 °C had superhydrophilic and superaerophobic properties, which contributed to the deactivation of bubbles from the surface of the electrode and improved the efficiency of the catalytic reaction. Moreover, the multi-stage array structure of sheet/particle will form a greater specific surface area than the plain sheet structure, offering more reaction sites. These results indicate that the self-supported superhydrophilic and superaerophobic Ni–Mo catalysts have excellent electrocatalytic hydrogen evolution ability.
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高影响因子
危险品化学品经营许可证（带存储）