CERAMICS INTERNATIONAL
·
2020
·Vol. 46
·期 11
·18888-18894
·
IF 3.83
Yiqian Guo,Wenting He,Hongbo Guo
Ceramic materials for the thermal barrier coating (TBC) application of Gd 2 Zr 2 O 7 (GZO), (Gd 0.94 Yb 0.06 ) 2 Zr 2 O 7 (GYb 0.06 Z), (Gd 0.925 Sc 0.075 ) 2 Zr 2 O 7 (GSc 0.075 Z), (Gd 0.865 Sc 0.075 Yb 0.06 ) 2 Zr 2 O 7 (GSc 0.075 Yb 0.06 Z), and (Gd 0.8 Sc 0.1 Yb 0.1 ) 2 Zr 2 O 7 (GSc 0.1 Yb 0.1 Z) were successfully synthesized by chemical co-precipitation. The effects of the doping of Sc 2 O 3 and Yb 2 O 3 on the phases, thermo-physical and mechanical properties of the ceramics were investigated. The results show that both Yb 2 O 3 and Sc 2 O 3 doping promoted the phase transition of GZO from pyrochlore to fluorite. All the Sc 2 O 3 -doped samples exhibited enhanced fracture toughness, as compared to the undoped sample. Furthermore, the GSc 0.075 Yb 0.06 Z sample revealed a thermal conductivity of ~0.8 W/mK at 1200 °C, which was nearly 30% lower than that of the undoped sample. The associated mechanisms related to the effects of the doping on the thermophysical and mechanical properties are discussed.
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JOURNAL OF MATERIALS RESEARCH
·
2026
·
IF 2.9
Zhang Zhiwei,Nie Yuhang,Zhang Lianke,Wei Zhiqiang,Li Dandan,Qin Haiying,Ni Hualiang,Li Yangyang,He Junjing
Atomically dispersed catalysts, characterized by their high atom utilization efficiency and distinct catalytic activity, exhibit advantages in reducing fuel cell costs. Herein, we synthesized Co/N/C atomic catalysts by acid leaching of CoO/N/C prepared through carbothermal shock. The resulting Co/N/C-130 demonstrates outstanding performance for the oxygen reduction reaction (ORR) in alkaline media. It displays a half-wave potential ( E 1/2 ) of 0.82 V and a Tafel slope of 47.1 mV dec −1 . Furthermore, it exhibits excellent stability with a positive E 1/2 shift of 6 mV after 40,000 cycles. When applied as a cathode catalyst in a direct borohydride fuel cell (DBFC), Co/N/C-130 achieves a maximum power density of 396 mW cm −2 at 60 °C. Long-term durability test at 50 mA cm −2 reveals a power retention of 90.8% after 24 h and 76.3% after 50 h. These results demonstrate that Co/N/C-130 atomic catalyst is a highly efficient and durable non-precious metal catalyst for ORR. Graphical abstract
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MICROBIOLOGICAL RESEARCH
·
2026
·
IF 8.5
Wei Zhao,Jingying Hu,Jitong Lin,Yanhong Lou,Hui Wang,Quangang Yang,Hongjie Di,Haojie Feng,Yuping Zhuge,Hong Pan
Co-contamination of agricultural soils with cadmium (Cd) and oxytetracycline (OTC) from organic fertilizers and wastewater irrigation threatens food safety. A pot experiment was conducted to examine the responses of soil and pak choi ( Brassica rapa subsp. chinensis ) to combined Cd (2/5 mg kg −1 ) and OTC (1/10/30 mg kg −1 ) exposure. Soil available Cd was primarily governed by the Cd addition level (F = 886.70, p < 0.001), but its response to OTC was concentration-dependent (F = 53.39, p < 0.001): available Cd increased by 2.89–3.11-fold with rising OTC under the Cd2 background but decreased under the Cd5 background, whereas the Cd bioconcentration factor was consistently lower in Cd5- than Cd2-treated soils ( p < 0.001), largely independent of OTC. The combined pollution reshaped bacterial communities and drove co-enrichment of antibiotic resistance genes (e.g., sul 1, sul 2, tet G, tet C) and the mobile genetic element int I1, whose abundance under Cd5 was up to 3.13-fold higher than under Cd2 in rhizosphere soils. The O10 treatments (Cd2O10 and Cd5O10) exhibited the highest comprehensive toxicity, with soil enzymatic IBR values reaching 3.79 and leaf IBR values reaching 7.9 × 10 −4 , alongside fewer negative microbial co-occurrence correlations and reduced network modularity. Under these high-toxicity conditions, the stress-tolerant genera Cupriavidus (Cd2O10) and Nocardiopsis (Cd5O10) were selectively enriched in root endophytes, and plant antioxidant defense responses (SOD, POD, GSH) were activated. Structural equation modeling indicated that Cd contamination directly and indirectly governed the edible safety of pak choi (λ = 0.75, p < 0.001). These findings reveal non-linear, dose-dependent risk patterns under Cd–OTC co-contamination and suggest microbial-assisted mitigation strategies for co-contaminated agricultural soils, providing insights for pollution control without compromising productivity.
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Nature Communications
·
2026
·
IF 18.1
Lei Jiwei,Wu Zihe,Ye Daoping,Feng Yifan,Tian Yu,Niu Jin,Liu Bowen,Wang Yi,Cheng Chong,Li Shuang,Zhao Changsheng
The catalytic conversion of CO 2 into value-added chemicals via the reverse water-gas shift (RWGS) reaction represents a significant pathway for mitigating climate change and enabling sustainable carbon utilization. However, Pt-based catalysts, despite their superior H 2 activation ability, often suffer from inadequate CO selectivity and durability under high-temperature conditions, primarily due to excessive CO adsorption at low-coordinated Pt edge sites. Herein, we present a sulfur (S)-mediated targeted passivation strategy to engineer Pt-CeO 2 catalysts with atomically tailored active sites, effectively addressing the critical activity-stability-selectivity trade-off. The incorporation of S into CeO 2 support induced optimized electronic modulation, as evidenced by in situ/ex situ characterizations and density functional theory (DFT) calculations, which weakened *CO adsorption strength and suppressed the methanation pathway. The optimized Pt-S-CeO 2 catalyst exhibits remarkable performance at 600 °C: CO selectivity >95%, CO production rate of 8.8×10 −5 mol g cat −1 s −1 , and <10% activity loss over 250 h. On the other hand, this work establishes a framework for targeted dopant-mediated site engineering in heterogeneous catalysis, offering a generalizable route to reconcile conflicting performance in CO 2 hydrogenation systems and beyond.
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JOURNAL OF POLYMERS AND THE ENVIRONMENT
·
2026
·Vol. 34
·期 7
·164
·
IF 5.6
Zhao Zhenxiao,Jia Jun,Zhang Ning,Hu Jing,Qi Chao,Feng Jingyuan,Li Haiyang,Qin Yi,Wang Guoqiang
To improve the ductility of polylactic acid (PLA) and broaden its application, we synthesized poly(butylene glutarate-co-2,5-furandicarboxylate) (PBGF) via melt polycondensation from 2,5-furandicarboxylic acid (FDCA), glutaric acid (GA) and 1,4-butanediol (BDO). We prepared PLA/PBGF blends from PLA and PBGF at mass ratios of 90/10, 80/20, and 70/30. The chemical structure and molecular weight of PBGF were characterized. The thermal properties, mechanical properties, microstructure, crystal structure and processability of the blends were studied by differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), tensile test, dynamic thermal mechanical analysis (DMA), scanning electron microscopy (SEM), X-ray diffraction (XRD) and rheological analysis. The results showed that the random copolyester PBGF was successfully synthesized. Its number-average molecular weight ( M n ) was 36,200 g/mol, weight-average molecular weight ( M w ) was 84,900 g/mol, and polydispersity index ( D ) was 2.3. PBGF is a crystalline material, while PLA/PBGF blends have an approximate amorphous structure. With the increase of the PBGF content from 0 wt% to 30 wt%, the elongation at break increased significantly from 10.3% to 255.2%, the glass transition temperature ( T g ) decreased from 61.18 ℃ to 57.59 ℃, and the fracture mode changed from brittle fracture to ductile fracture. SEM and DMA confirmed PLA and PBGF had partial compatibility, island structure was formed in the blend, and shear bands appeared after stretching, which effectively improved the energy absorption capacity. Rheological tests showed that PBGF improved the processing stability of PLA. In this study, the ductility of PLA was improved by PBGF, which provides a new way to prepare high-performance biodegradable polymer.
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Materials
·
2026
·Vol. 19
·期 10
·2006
·
IF 3.7
Wenchao Zhan,Yuefeng Wang,Xumin Wang,Hao Yang,Qianqian Feng,Xianfen Wang
Thanks to their low cost and environmental sustainability, sodium-ion batteries have emerged as a highly attractive alternative to lithium-ion systems in the field of large-scale energy storage; however, issues such as insufficient energy density and poor cycle stability have hindered their widespread adoption. We have rationally designed a Mg/Li co-doped P2-type NLMMO (Na0.8Mg0.22Li0.08Mn0.7O2) cathode material that enables reversible anion redox reactions through synergistic interactions, enhancing the stability of the layered framework. The material exhibits an exceptional initial discharge capacity of 158 mAh g−1at 2.0–4.4 V and retains 68% of its capacity after 400 cycles at 0.1 A g−1, surpassing the performance of both lithium-doped (Na0.8Li0.3Mn0.76O2, NLMO) and magnesium-doped (Na0.8Mg0.3Mn0.7O2, NMMO) materials. In situ XRD shows that NLMMO has structural stability, and the Mg doping modification strongly inhibits the phase transition and stabilizes the interlayer structure. Ex situ XPS analysis indicates that the lattice oxygen in the cathode material underwent changes. This study provides a new path for designing cathodes with synergistic anionic and cationic redox reactions.
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Advanced Powder Materials
·
2026
·
IF 26.8
Shuxian Bi,Yishu Lv,Ying Liu,Yuan Shu,Weiyuan Wu,Panpan Wang,Xicai Tian,Pengfei Zhang,Zhenghong Luo
A scalable solid–liquid–solid route constructs intimate LaCoO 3 /CeO 2 interfaces. • 5 wt.% LaCoO 3 /CeO 2 -SLS boosts LaCoO 3 -normalized CO oxidation ∼99-fold. • Kilogram-scale batches retain uniform and durable CO oxidation performance. : Perovskite catalysts exhibit excellent thermal stability but suffer from insufficient activity, creating an activity–stability trade-off that hinders their practical implementation. Constructing interfaces with reducible oxides (e.g., LaCoO 3 /CeO 2 ) can overcome this limitation via electronic metal oxide-support interaction (eMOSI), yet controllable synthesis remains challenging. Here, we report a “solid–liquid–solid” nanoparticle-transfer method for the scalable fabrication of supported LaCoO 3 /CeO 2 heterostructures, in which LaCoO 3 crystallization is completed before its deposition onto CeO 2 . Preformed LaCoO 3 nanoparticles are transferred from a removable NaCl matrix onto CeO 2 , thereby bypassing support-mediated co-nucleation and the differential migration of La and Co species. Remarkably, the 5 wt.% LaCoO 3 /CeO 2 -SLS catalyst achieves a LaCoO 3 -mass-normalized CO consumption rate of 1.16×10 −4 mol·g LaCoO3 −1 ·s −1 , nearly two orders of magnitude higher than that of pristine LaCoO 3 at 160 °C. It also exhibits exceptional durability (near-500 h on stream) and can be scaled to kilogram scale without performance loss. XRD, Raman, EELS, Ce L 3 -edge XANES, and DFT calculations collectively reveal interfacial electron transfer from LaCoO 3 toward CeO 2 with partial ceria reduction, thereby promoting CO oxidation. This work provides a general powder-processing strategy for constructing supported multicomponent oxide interfaces and demonstrates the potential of interfacial electronic engineering for scalable catalytic powder manufacturing. A simple and scalable solid–liquid–solid nanoparticle-transfer route forms LaCoO 3 nanoparticles on a removable NaCl template. Upon NaCl dissolution, the preformed nanoparticles are released and transferred onto CeO 2 , generating intimate oxide–oxide interfaces with enhanced charge transfer and oxygen activation for efficient and durable low-temperature CO oxidation. Download: Download high-res image (284KB) Download: Download full-size image
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Cell Reports Medicine
·
2026
·
IF 14
Qiliner Feng,Chen Wang,Zexi Li,Dingran Sheng,Si Shi,Jie Liu,Baizhu Chen
Bacteria-based living therapeutics exhibit outstanding potential for tumor immunotherapy when combined with functional materials or rewired with rationally designed gene circuits. To stimulate T cells precisely and effectively, herein, we report the surface-engineered bacteria as the living therapeutic for tumor immunotherapy. Escherichia coli cells are genetically programmed to display surface-anchored B7H2 to provide immunological co-stimulation signal of T cells and Histag to coordinate with ZnS quantum dots. In tumors, B7H2 induces the co-stimulatory ICOS-B7H2 signal at the molecular level and triggers the stimulation of cytotoxic T cells, the polarization of helper T cells, the release of cytokines, and long term antitumor immunological memory. Meanwhile, the coordinated ZnS quantum dots image tumors and synergize with B7H2 to enhance immune effects by activating the cGAS/STING pathway. With functional domains displaying on the bacterial surface, we establish an efficient living therapeutic approach for tumor immunotherapy.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Shanying He,Jiahao Kang,Juncong Zou,Xiang Li,Shaohua Wu,Chunping Yang
Nanoparticle incorporation reduces the coordination number of Co-N x while enhancing curvature. • The kinetic rate constant reached 315 min −1 M −1 was achieved at an ultralow PMS concentration. • The PMS complex exhibits excellent oxidation efficiency while maintaining high selectivity. Metal nanoparticles could regulate the electronic structure of single-atom sites in catalysts, thus enhance efficiency in the Fenton-like reactions. However, the effects and mechanisms of nanoparticle existence on both coordination number and curvature of metal sites remains largely overlooked. Herein introducing nanoparticles into catalysts serves as a strategy to modulate catalyst size effect for directional construction of metal sites possessing lower coordination numbers and higher curvature. Theoretical and experimental results reveal that decrease of the coordination number and increase of the curvature of the metal sites boost electron density, unlocking the energetic potential for adsorption in the peroxymonosulfate (PMS) system and highlighting their key function in the regulation of the electronic structure of the metal centers. This effect facilitates highly efficient electron transfer between cobalt atoms and PMS, which promotes the formation of PMS complexes (PMS*). As a result, the catalyst (denoted as Co NPs/Co-N 3 -C) achieved an exceptional k -value of 315 min −1 M −1 in the Fenton-like removal of Bisphenol A (BPA), outperforming the majority of transition-metal catalysts reported in recent years. This study provides a synthetic strategy for catalysts integrating metal single atoms with nanoparticles and elucidates how coordination environment and curvature jointly regulate electronic structure to achieve efficient Fenton-like reactions.
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Journal of the American Chemical Society
·
2026
·
IF 16.6
Min Qiuhong,Lu Ruihu,Jin Jian,Su Shangchun,Si Gangzheng,Lou Yuanhao,Wang Chundong,Li Wenjia,Liu Xiangyu,Wang Feifei,Wang Ziyun,Pang Yuanjie
The
conversion of CO to acetate represents a selective and efficient
pathway among CO 2 /CO-to-C 2+ electroreduction
routes, with recent advancements being partly attributed to pressurized
electrolyzer designs. Pressurization establishes bulk CO enrichment
that enhances mass transport, yet methodologies for designing catalyst
surfaces to efficiently accommodate and electroreduce dense *CO intermediates
remain underdeveloped. We systematically investigate *CO adsorption
coverage and affinity across copper surfaces with varying structural
features, correlating these properties with CO-to-acetate performance.
Notably, operando Raman spectroscopy conducted in a custom flow reactor
replicating pressurized environments reveals pressure-dependent *CO
adsorption and conversion dynamics on distinct Cu surfaces. We discover
that Cu twin boundaries optimally support both pressurization-enhanced
CO adsorption and subsequent conversion steps, achieving Faradaic
efficiencies of 91% for total C 2+ products and 82% for
acetate at 10 atm CO pressure, surpassing all reported monometallic
Cu catalysts. We contributed a practical tool for the operando characterization
of pressurized gas-fed electrocatalytic processes.
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ACS Applied Energy Materials
·
2026
·
IF 5.5
Wu Pengxuan,Ding Yusong,Li Bingshuang,He Yunxia,Liu Qian,Huang Xiaoxi
This study reports a mesoporous carbon confinement strategy for enhancing the mass activity and structural durability of Au-based catalysts toward electrochemical CO 2 reduction reaction (CO 2 RR) to CO. Glutathione-protected Au clusters were introduced into polyaniline-derived mesoporous carbon (PDMC), followed by thermal ligand removal, producing ultrasmall Au nanoparticles uniformly embedded within a conductive N-doped carbon framework. The mesoporous carbon matrix effectively restricts Au growth and suppresses nanoparticle aggregation, thereby preserving abundant low-coordinated Au surface sites while maintaining accessible channels for charge and mass transport. The optimized Au@PDMC-30 catalyst delivers a CO Faradaic efficiency of 90.0 ± 1.3% at –0.9 V vs reversible hydrogen electrode in an H-type cell and maintains stable CO production for over 24 h without obvious Au aggregation. More importantly, under flow-cell conditions, Au@PDMC-30 achieves a high CO mass activity of 1192.4 mA mg –1 , approximately twice that of commercial Au/C, demonstrating greatly improved precious-metal utilization. In situ Fourier transform infrared spectroscopy and density functional theory calculations reveal that the confined low-coordinated Au sites possess an optimized electronic structure that facilitates *COOH formation, thereby accelerating the CO 2 to CO pathway. This work highlights confinement engineering of ultrasmall noble-metal nanoparticles as an effective route to improve catalytic selectivity, durability, and mass-normalized activity for CO 2 RR.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Jian Tian,Xuwen Zhang,Mengge Wu,Benhuan Xu,Kok Bing Tan,Bin Chen,Guowu Zhan
The conversion of stearic acid to linear hydrocarbons represents a critical step in the advancement of sustainable biofuels and biochemicals. In this work, a confined NiCo bimetallic catalyst (Nix-Co/C@TSC) was assembled on biochar derived from natural Tung shell (TS) using an in situ growth approach for the H2-free catalytic deoxygenation of fatty acids. The catalyst exhibited exceptional catalytic performance, achieving a high conversion of 98.2% and a remarkable selectivity of 82.8% for heptadecane. Multiple characterization revealed that the Tung shell-derived biochar (TSC) support significantly enhanced the spatial dispersion of Co and Ni species, promoting the formation of the NiCo alloy phase. This structural modification, combined with improved reactant adsorption capabilities, synergistically boosted the overall catalytic activity. In situ DRIFTS analysis revealed that CoOx species activate stearic acid via strong carboxyl-group adsorption, while Ni preferentially promotes the decarboxylation pathway by stabilizing key intermediates, collectively facilitating heptadecane formation. This work develops a novel dual carbon-supported bimetallic catalyst system, offering a promising strategy for the efficient conversion of stearic acid into high-value hydrocarbon products.
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