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学者姓名：喻志阳
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Abstract ：
Localized accumulation of carriers frequently induces corrosion on the surfaces of photocatalysts, restricting the efficacy of photocatalytic technology. The development of a strategy that precisely targets and transforms passivated corrosion regions into reactive sites holds significant potential, yet remains technically challenging. Herein, an advanced microscopy study reveals that BiOBr photocatalysts are susceptible to severe photo-corrosion, leading to a continual thickening of Bi2O3 crystalline films as the photo-oxidation products accumulate on the photocatalytic surfaces. Through a metal cation intercalation process, it is demonstrated that the passivated Bi2O3 films are precisely targeted by the accumulated holes and in situ converted to MxBiyOz (M = Co, Mn, Fe, Pb) nanobeads that act as co-catalysts to expedite charge transfer and enhance photostability. This work deepens the understanding of the atomistic photocorrosion mechanism of BiOBr photocatalysts and contributes to a versatile surface-targeted photochemical modification approach to tackle widespread photocorrosion challenges. © 2025 Wiley-VCH GmbH.
Keyword ：
BiOBr photocatalysts BiOBr photocatalysts co-catalysts co-catalysts metal cation intercalation metal cation intercalation photocatalysis photocatalysis photocorrosion photocorrosion
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| GB/T 7714 | Luo, Z. , Zhang, S. , Ye, X. et al. Direct Conversion of Passivated Photo-Corroded Sites into Active Co-Catalysts via In Situ Targeting [J]. | Advanced Functional Materials , 2025 . |
| MLA | Luo, Z. et al. "Direct Conversion of Passivated Photo-Corroded Sites into Active Co-Catalysts via In Situ Targeting" . | Advanced Functional Materials (2025) . |
| APA | Luo, Z. , Zhang, S. , Ye, X. , Xue, S. , Chen, J. , Huang, M. et al. Direct Conversion of Passivated Photo-Corroded Sites into Active Co-Catalysts via In Situ Targeting . | Advanced Functional Materials , 2025 . |
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An intact oxide scale adhering well to the matrix is crucial for the safe service of metallic materials at high temperatures. However, premature failure is usually caused by spallation of scales from the matrix. Although few mechanisms have been proposed to understand this phenomenon, consensus has not yet been reached. In this study, we reveal that trace sulfur impurities contaminated in high-purity raw materials prominently segregate to the interface and form a thin intermediate amorphous-like layer between the oxide scale and alloy matrix during the oxidation process. Subsequently, cracking and spallation occur preferentially between the sulfur-rich layer and alumina scale due to the weak bonding between sulfur and alumina atoms. We validate the revealed atomistic spalling mechanism by successfully eliminating the detrimental effect of sulfur via microalloying. Our findings are useful for improving adhesion of oxide scales and enhancing heat-resistant properties of other high-temperature alloys.
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| GB/T 7714 | Li, Congcong , Zheng, Wenjin , Zhong, Haonan et al. Unveiling the atomistic mechanism of oxide scale spalling in heat-resistant alloys [J]. | NATURE COMMUNICATIONS , 2025 , 16 (1) . |
| MLA | Li, Congcong et al. "Unveiling the atomistic mechanism of oxide scale spalling in heat-resistant alloys" . | NATURE COMMUNICATIONS 16 . 1 (2025) . |
| APA | Li, Congcong , Zheng, Wenjin , Zhong, Haonan , Liu, Xiongjun , Zhu, Huihui , Wang, Hui et al. Unveiling the atomistic mechanism of oxide scale spalling in heat-resistant alloys . | NATURE COMMUNICATIONS , 2025 , 16 (1) . |
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Lattice oxygen-mediated photocatalytic ethane dehydrogenation represents a sustainable strategy for ethylene production, yet achieving a balance between high productivity, selectivity, and durability remains challenging. Here, we report a defective NiO-300 catalyst, where precisely engineered Ni vacancies activate lattice oxygen by weakening Ni-O bond and improving lattice oxygen mobility. This promotes efficient ethane activation and C-H bonds cleavage through photoinduced hole capture, intensifying ethane dehydrogenation via a light-boosted Mars-van Krevelen mechanism. The NiO-300 catalyst manifests a high ethylene yield of 604.5 mu mol g-1 h-1 with 100% selectivity and stability over 200 cycles. In situ spectroscopic and theoretical studies elucidate the generation of active oxygen species, the evolution of Ni coordination, the formation of key intermediates, and the underlying photocatalytic mechanism. Our findings highlight cation vacancy engineering as a powerful tactic to fully activate lattice oxygen for solar-driven alkene production from alkane dehydrogenation over oxide photocatalysts.
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| GB/T 7714 | Wei, Fen , Zhao, Jiwu , Liu, Yu-Chun et al. Photocatalytic ethylene production over defective NiO through lattice oxygen participation [J]. | NATURE COMMUNICATIONS , 2025 , 16 (1) . |
| MLA | Wei, Fen et al. "Photocatalytic ethylene production over defective NiO through lattice oxygen participation" . | NATURE COMMUNICATIONS 16 . 1 (2025) . |
| APA | Wei, Fen , Zhao, Jiwu , Liu, Yu-Chun , Hsu, Yung-Hsi , Hung, Sung-Fu , Fu, Junwen et al. Photocatalytic ethylene production over defective NiO through lattice oxygen participation . | NATURE COMMUNICATIONS , 2025 , 16 (1) . |
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Functional ceramics, once integrated with flexibility, hold great promise for cutting-edge electronic devices. Unfortunately, functionality and flexibility are inherently exclusive in ceramics: the long-range order of ionic lattices bestows polarization-like properties that accompany brittleness, whereas disorder tolerates bond rotation to generate flexibility with significant loss of performance. Implanting ordered functional motifs within amorphous ceramics, though challenging, may balance this trade-off. Here, the challenge is met through a high-entropy strategy, which allows the initial crystallization of randomly dispersed nanocrystals followed by controlled amorphization of high-entropy compositions to attain a crystalline/amorphous microstructure, yielding a Bi4Ti3O12-based film that can withstand similar to 180 degrees folding with a bending strain and tensile elongation up to 4.80% and 5.29%, respectively. The crystalline/amorphous structure enables the production of a flexible dielectric capacitor with high permittivity (similar to 35), good temperature stability and durability. This strategy offers research prototypes for customizing the microstructures of functional ceramics, advancing next-generation ceramics with flexibility.
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| GB/T 7714 | Dou, Lvye , Yang, Bingbing , Ye, Xiaoyuan et al. Flexible high-entropy functional ceramics [J]. | NATURE COMMUNICATIONS , 2025 , 16 (1) . |
| MLA | Dou, Lvye et al. "Flexible high-entropy functional ceramics" . | NATURE COMMUNICATIONS 16 . 1 (2025) . |
| APA | Dou, Lvye , Yang, Bingbing , Ye, Xiaoyuan , Zhang, Yang , Zhu, Wenqing , Chen, Huiling et al. Flexible high-entropy functional ceramics . | NATURE COMMUNICATIONS , 2025 , 16 (1) . |
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Understanding elements uptake and release from minerals in source rocks is crucial for comprehending critical metals accumulation, yet the mechanisms and kinetics of element mobilization at the atomic scale remain mostly unknown. Here, we analyzed the distribution of cobalt (Co) in natural pyrite from a Cu-Co ore deposit and found that metals distribution is best described by steady-state diffusion with constant flux and concentration-dependent diffusivities, rather than transient-state diffusion with time-evolving concentrations. First-principles calculations and diffusion modelling further demonstrate that this diffusion is accelerated by vacancy pathways and is far more efficient than traditional vacancy-mediated lattice diffusion, with element transfer rates higher by almost two orders of magnitude. We conclude that steady-state lattice diffusion induced by vacancies in the presence of fluid can be an efficient mechanism promoting the preferential release of metals into ore fluids and the accumulation of metals during ore formation.
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| GB/T 7714 | Qiu, Zheng-Jie , Xing, Yanlu , Brugger, Joel et al. Vacancies in sulfides facilitate fluid-induced solid-state diffusion and critical metals accumulation [J]. | NATURE COMMUNICATIONS , 2025 , 16 (1) . |
| MLA | Qiu, Zheng-Jie et al. "Vacancies in sulfides facilitate fluid-induced solid-state diffusion and critical metals accumulation" . | NATURE COMMUNICATIONS 16 . 1 (2025) . |
| APA | Qiu, Zheng-Jie , Xing, Yanlu , Brugger, Joel , Etschmann, Barbara , Pinter, Zsanett , Fougerouse, Denis et al. Vacancies in sulfides facilitate fluid-induced solid-state diffusion and critical metals accumulation . | NATURE COMMUNICATIONS , 2025 , 16 (1) . |
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Oxygen vacancies (OVs) spatially confined on the surface of metal oxide semiconductors are advantageous for photocatalysis, in particular, for O2-involved redox reactions. However, the thermal annealing process used to generate surface OVs often results in undesired bulk OVs within the metal oxides. Herein, a high pressure-assisted thermal annealing strategy has been developed for selectively confining desirable amounts of OVs on the surface of metal oxides, such as tungsten oxide (WO3). Applying a pressure of 1.2 gigapascal (GPa) on WO3 induces significant lattice compression, which would strengthen the W-O bonds and increase the diffusion activation energy for the migration of the O migration. This pressure-induced compression effectively inhibits the formation of bulk OVs, resulting in a high density of surface-confined OVs on WO3. These well-defined surface OVs significantly enhance the photocatalytic activation of O2, facilitating H2O2 production and aerobic oxidative coupling of amines. This strategy holds promise for the defect engineering of other metal oxides, enabling abundant surface OVs for a range of emerged applications.
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| GB/T 7714 | Wang, Xiaoyi , Xue, Sikang , Huang, Meirong et al. Pressure-Induced Engineering of Surface Oxygen Vacancies on Metal Oxides for Heterogeneous Photocatalysis [J]. | JOURNAL OF THE AMERICAN CHEMICAL SOCIETY , 2025 , 147 (6) : 4945-4951 . |
| MLA | Wang, Xiaoyi et al. "Pressure-Induced Engineering of Surface Oxygen Vacancies on Metal Oxides for Heterogeneous Photocatalysis" . | JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 147 . 6 (2025) : 4945-4951 . |
| APA | Wang, Xiaoyi , Xue, Sikang , Huang, Meirong , Lin, Wei , Hou, Yidong , Yu, Zhiyang et al. Pressure-Induced Engineering of Surface Oxygen Vacancies on Metal Oxides for Heterogeneous Photocatalysis . | JOURNAL OF THE AMERICAN CHEMICAL SOCIETY , 2025 , 147 (6) , 4945-4951 . |
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As a candidate material for accident-tolerant fuel (ATF) cladding tubes, the intergranular corrosion (IGC) of FeCrAl alloys under nuclear reactor operating conditions is becoming a general concern. Optimizing the grain boundary character distribution (GBCD) through grain boundary engineering (GBE) is the basic approach to improving the IGC resistance of FeCrAl alloys. Due to its intrinsic properties, FeCrAl alloys with a body-centered cubic (BCC) structure are not readily inclined to form singular boundaries (SBs), such as coherent twin boundaries that are "immune" to corrosion attacks, during microstructural reconstruction processes like deformation and recrystallization. It has become the focus of GBE research of nuclear FeCrAl alloy to understand the formation law of {0 1 1}/{0 1 1} near singular boundaries (NSBs) with better corrosion resistance than random boundaries (RBs), and to try to increase their proportion. The present study choses nuclear-grade Fe-12.5wt.%Cr4.0wt.%Al alloy, which has undergone solution treatment and microstructure randomization, as the experimental material. Using a quantitative grain boundary inter-connection (GBIC) characterization method based on electron backscatter diffraction (EBSD) and five-parameter analysis (FPA), the GBCD of five parallel samples was systematically investigated. These samples were subjected to 70 % rolling deformation (thickness reduction) at different temperatures ranging from 550 degrees C to 835 degrees C, followed by recrystallization annealing at 900 degrees C for 5 min. The results indicate that the proportion of {0 1 1}/{0 1 1}-NSBs in the five samples first increases and then decreases with the rise in rolling temperature before recrystallization annealing. The sample rolled at 735 degrees C and recrystallized at 900 degrees C exhibits the highest proportion of {0 1 1}/{0 1 1}-NSBs, reaching a maximum value of 7.41 %. Microstructural observations and overlapped pole fig. GB trace analysis indicate a correlation between the recrystallization texture and the proportion of {0 1 1}/{0 1 1}-NSBs. This is reflected in the frequent presence of (0 1 1)/theta misorientation relationships between grains with (0 1 1)//ND orientation and grains with other orientations, and a higher occurrence of {0 1 1}/{0 1 1}-NSBs in the associated GBs. High angle annular dark field observations via scanning transmission electron microscopy (STEM-HAADF) and crystallographic analysis reveal that {0 1 1}/{0 1 1}-NSBs in FeCrAl alloys exhibit periodic well-matched atomic regions and periodic structural units (SUs). The degree of order of atomic arrangement in these boundaries is significantly higher than that in RBs, which is the main reason for their superior corrosion resistance compared to RBs.
Keyword ：
FeCrAl alloy FeCrAl alloy Grain boundary inter-connection Grain boundary inter-connection Intergranular corrosion Intergranular corrosion Near singular boundary Near singular boundary Structural unit Structural unit
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| GB/T 7714 | Liu, Zhaochi , Wang, Weiguo , Rohrer, Gregory S. et al. {011}/{011} near singular boundaries in rolled and recrystallized FeCrAl alloys [J]. | MATERIALS CHARACTERIZATION , 2025 , 221 . |
| MLA | Liu, Zhaochi et al. "{011}/{011} near singular boundaries in rolled and recrystallized FeCrAl alloys" . | MATERIALS CHARACTERIZATION 221 (2025) . |
| APA | Liu, Zhaochi , Wang, Weiguo , Rohrer, Gregory S. , Chen, Song , Du, Peinan , Gu, Xinfu et al. {011}/{011} near singular boundaries in rolled and recrystallized FeCrAl alloys . | MATERIALS CHARACTERIZATION , 2025 , 221 . |
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In this work, efficient grain boundary diffusion (GBD) of Tb can be achieved in fine-grained sintered Nd-Fe-B magnet through the addition of Zr. The magnets were prepared using Nd-Fe-B powder with an average particle size of 2.6 mu m. Compared with the magnet without Zr addition, the intrinsic coercivity of the Zr-added magnet increases by 3.55 kOe after GBD with the increment of 15.0 %, and the squareness of the demagnetization curve is improved by 5.7 %. The Zr element can combine with the C element in the magnet to form block-like ZrC precipitates, which inhibits the formation of harmful rare-earth carbon phase and reduces the ineffective depletion of rare earth elements. In addition, the Zr element can also combine with the B element to form needle-like ZrB2 precipitates. The consumption of B element increases the volume fraction of RE-rich phase, thus providing more liquid-phase channels for the diffusion of Tb. The ZrC and ZrB2 precipitates distributed at the grain boundary (GB) can broaden the width of the GB phase, which not only provide broader channels for Tb diffusion, but also improve the magnetic isolation of the main phase grains. By the addition of Zr, the diffusion depth of Tb in the magnet is increased. Meanwhile, the accumulation of Tb on the diffusion surface of the magnet reduces significantly, and the thin and uniform Tb-rich shell is formed on the exterior of the main phase grains in the magnet.
Keyword ：
Fine-grain Fine-grain Grain boundary diffusion Grain boundary diffusion Intrinsic coercivity Intrinsic coercivity Nd-Fe-B magnets Nd-Fe-B magnets Zr addition Zr addition
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| GB/T 7714 | Su, Wenze , Lu, Jiahao , Xiao, Lei et al. Improving Tb diffusion and magnetic properties in fine-grained NdFeB magnet by Zr addition [J]. | MATERIALS CHARACTERIZATION , 2025 , 224 . |
| MLA | Su, Wenze et al. "Improving Tb diffusion and magnetic properties in fine-grained NdFeB magnet by Zr addition" . | MATERIALS CHARACTERIZATION 224 (2025) . |
| APA | Su, Wenze , Lu, Jiahao , Xiao, Lei , Fu, Gang , Shi, Dawei , Wang, Chen et al. Improving Tb diffusion and magnetic properties in fine-grained NdFeB magnet by Zr addition . | MATERIALS CHARACTERIZATION , 2025 , 224 . |
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Twin boundaries are frequently observed in polycrystalline materials, significantly influencing their stability and mechanical properties. In this study, we reveal a previously unidentified growth twinning mechanism induced by solute segregation, wherein changes in local electronic structure dictate twin formation. Aberration-corrected scanning transmission electron microscopy, combined with energy-dispersive spectroscopy, demonstrates that the interfacial segregation of W atoms triggers growth twinning in (V, W)C precipitates. Notably, the formation of twin boundaries is highly sensitive to the local W concentration, with a high segregation level of up to 50 at% promoting twin formation, whereas a lower concentration of 20 at% suppresses it. First-principles calculations further reveal that this twinning mechanism originates from a local coordination shift, transitioning from the octahedral geometry characteristic of VC to the mirror-symmetric trigonal coordination of W2C at elevated W concentrations. These findings provide a deeper understanding of solute-induced twinning and offer a pathway for precise control of twin events in crystalline materials.
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| GB/T 7714 | Zheng, Wenjin , Lei, Huasheng , Lai, Wei et al. A new twinning mechanism induced by solute electronic structures [J]. | MATERIALS HORIZONS , 2025 , 12 (17) : 7024-7032 . |
| MLA | Zheng, Wenjin et al. "A new twinning mechanism induced by solute electronic structures" . | MATERIALS HORIZONS 12 . 17 (2025) : 7024-7032 . |
| APA | Zheng, Wenjin , Lei, Huasheng , Lai, Wei , Ye, Xiaoyuan , Fu, Junwen , Hu, Chongze et al. A new twinning mechanism induced by solute electronic structures . | MATERIALS HORIZONS , 2025 , 12 (17) , 7024-7032 . |
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Carbon nitride (CN) materials have been employed as catalysts in many scientific fields. Moreover, highly crystalline CN as an ideal model material for key problems in catalytic reaction research has received a lot of attention. Herein, the Li+ incorporated highly crystalline poly(triazine imide) (PTI-Li+) with a well-defined structure is successfully fabricated through the ionothermal method. The atomically dispersed Li in the PTI-Li+ serve as the active sites in the selective catalytic oxidation of H2S, and the interaction between Li ions and PTI-Li+ framework extends electron delocalization and modulate electronic band structure resulting in improved O2 and H2S adsorption and activation ability. Consequently, PTI-Li+ shows excellent selective catalytic desulfurization activity and durability. This work not only designs an efficient desulfurization catalyst but also demonstrates the role of these atomically dispersed Li ions in PTI-Li+ during the catalytic reaction, enlightening the deeper understanding and wider application of carbon nitride materials. PTI-Li+ with a clear structure is used for selective catalytic oxidation of H2S. The triazine-based structure and atomically dispersed Li ions endow PTI-Li+ with excellent catalytic performance and durability. This study highlights the role of structural Li ions in the catalytic reaction, which enlightens the deeper understanding and targeted improvements of carbon nitride materials.image
Keyword ：
desulfurization desulfurization heterogeneous catalysis heterogeneous catalysis poly(triazine imide) poly(triazine imide) selective catalytic oxidation selective catalytic oxidation structural lithium atom structural lithium atom
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| GB/T 7714 | Lyu, Shihuan , Wang, Jiali , Zhou, Yuqiao et al. Structural Lithium Incorporated with the Crystalline Poly(Triazine Imide) Frameworks for Selective Catalytic Oxidative Desulfurization [J]. | ADVANCED FUNCTIONAL MATERIALS , 2024 , 34 (10) . |
| MLA | Lyu, Shihuan et al. "Structural Lithium Incorporated with the Crystalline Poly(Triazine Imide) Frameworks for Selective Catalytic Oxidative Desulfurization" . | ADVANCED FUNCTIONAL MATERIALS 34 . 10 (2024) . |
| APA | Lyu, Shihuan , Wang, Jiali , Zhou, Yuqiao , Wei, Changgeng , Liang, Xiaocong , Yu, Zhiyang et al. Structural Lithium Incorporated with the Crystalline Poly(Triazine Imide) Frameworks for Selective Catalytic Oxidative Desulfurization . | ADVANCED FUNCTIONAL MATERIALS , 2024 , 34 (10) . |
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