INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2026
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IF 9.2
Nan Li,Xiaomi Xie,Mimi Zhang,Sitao Fang,Zifu Du,Loujun Gao,Lei Lv,Jianzhang Zhou,Deyin Wu,Rui Li,Xuan Jian
Developing efficient, stable and CO-tolerant electrocatalysts for alkaline hydrogen oxidation reaction (HOR) is vital for hydrogen fuel cells. Herein, we report a phytic acid-modified polyaniline-derived N, P-codoped porous carbon supported ruthenium catalyst (Ru/PA-Ani) for alkaline HOR. The catalyst exhibits an outstanding anodic current density of 8.97 mA cm −2 at 50 mV overpotential over 10 times higher than Ru/Ani and much better than commercial Pt/C. Mechanistic study suggested that the phosphate groups of Ru/PA-Ani catalyst establish a stable complexation system with polyaniline, and the molecular orbital distribution features of its HOMO and LUMO afford molecular-level support for the valence state modulation of Ru 3+ Meanwhile, N, P co-doping optimizes active site dispersion and electronic structure, promoting OH* generation and charge transport. This work provides an effective strategy for high-performance HOR catalysts and guides the design of low cost, stable anode catalysts for alkaline fuel cells.
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JOURNAL OF ORGANIC CHEMISTRY
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2025
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IF 3.6
Jian Wang,Xinxin Zhao,Wenda Li,Kehan Liu,Zuyue Tu,Xiangyu Zeng,Zhihui Wang,Yijia Wang,Ting Li,Ming Chen
A green and efficient method for the assembly of N-acylureas through an NIS-promoted Hofmann-type rearrangement has been described. The advantages of this protocol include mild, metal-free conditions, operational simplicity, broad substrate scope, good functional group tolerance, and high chemoselectivity. The potential practicability and synthetic utility were demonstrated by its easy scalability and application in the concise synthesis of commercial pesticides and drugs. The process of the transformation in our work integrates an unconventional acyl transfer mechanism into the well-established framework of the classical Hofmann rearrangement, which enables the direct conversion of 2-oxoamides to acyl isocyanates.
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Journal of Hazardous Materials Advances
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2025
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IF 7.7
Shiyu Cao,Furong Guo,Meiqi Li,Xin Zhang,Yifu Xu,Jiangshan Li
Roxarsone (ROX), a widely used organic arsenic feed additive, enters paddy soils through animal manure fertilizer, posing serious risks to environmental and human health. However, the underlying mechanisms of ROX stabilization, particularly the role of soil cultivation duration, remain poorly understood. Here, we compared ROX stabilization in new paddy soil (NPS, 10-year cultivation) and old paddy soil (OPS, 100-year cultivation). NPS exhibited higher ROX stabilization ability than OPS, as evidenced by a 1.5-fold higher adsorption rate constant, a 28-fold higher organic carbon-normalized partition coefficient (K oc ) and retention of 13-fold more arsenic in the residual fraction (non-extractable arsenic). The improved adsorption and stability in NPS were mainly due to complex formation between nitrogen-rich organic matter and Fe(II). In-situ spectroscopic and electrochemical analyses revealed that the complex promote ROX fixation by forming a Fe(II)-ROX-N ternary configuration. This structure was derived from the bidentate binuclear binding of As(V) with iron sites and deprotonated N-containing functional groups. These findings provided mechanistic insights into organic arsenic adsorption in soils and offered theoretical guidance for optimizing soil composition management strategies.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Feihong Zeng,Fangyuan Zhao,Xinyu Su,Qiang Wang,Zhibo Liu,Chao Zhen,Yong Liu,Gang Liu,Wencai Ren,Gaorong Han,Zongping Chen
Constructing p-n homojunctions while confining them on the surface of two-dimensional (2D) photocatalyst is a highly promising way to promote charge separation and thus improve the photocatalytic performance, yet they have rarely been achieved thus far. Here, we prepare 2D titanium oxide nanosheets enriched with both n-type oxygen vacancies and p-type titanium vacancies that form surface localized p-n homojunctions. The built-in electric field of the homojunctions promotes the unidirectional movement and separation of photogenerated carriers. Moreover, the p-n homojunctions confined to the surface of the ultrathin nanosheet can interact directly with the reactants, which reduces the recombination probability of electron-hole pairs. As a result, these p-n homojunctions enable an outstanding photocatalytic activity for water decontamination which is 30 times higher than that of benchmark titanium oxide. These results provide new opportunities for design and engineering of defects of 2D photocatalysts, potentially driving technological breakthroughs for energy conversion and environmental remediation.
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APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Hao Yang,Junbin Xie,Xiangyu Li,Zhao Liu,Guixiang Teng,Zhongli Zhao,Jie He,Chun Zhang
Given the accelerated pace of industrial development and the escalating issue of water pollution, the development of high-efficiency and energy-saving materials for the degradation of organic pollutants is imperative. Consequently, the development of heterojunction photocatalytic materials has emerged as one of the most promising strategies. In this study, n-type semiconductor ZnFe 2 O 4 nanorods and p-type semiconductor BiOI nanoflowers were utilized to construct a type p-n heterojunction ZnFe 2 O 4 /BiOI, exhibiting a significantly larger specific surface area of 38.72 m 2 /g, which is 4.6 times greater than that of ZnFe 2 O 4 (8.30 m 2 /g). The density functional theory calculations reveal that the formation of the heterojunction substantially improves the electron transport efficiency and markedly suppresses the recombination of photogenerated charge carriers, primarily due to the establishment of a p-n heterostructure. Moreover, the degradation efficiency of tetracycline achieved an impressive rate of 94.8 %. The degradation efficiency remained above 90 % following three photocatalytic reaction cycle tests.
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ENERGY & FUELS
·
2025
·
IF 5.3
Hui Yang,Libo Han,Haiquan Su,Lili Wan,Yue Su
Dry reforming of methane (DRM) reaction has attracted much attention due to its important implications for the environment and energy. The nonprecious metallic nickel is a promising active metal in DRM catalysts because of its low price and high activity. However, nickel-based catalysts are prone to deactivation due to sintering and carbon deposition, which is the main factor limiting the industrial application of the DRM reaction. Herein, a highly stable DRM catalyst has been developed, which was a highly dispersed nickel-based catalyst Ni/N-C-DS (Ni supported on N–C support prepared by the double-solvent (DS) method), prepared by impregnating Ni2+ into the cavities of ZIF-8 using the double-solvent method (DS), followed by a one-step carbonization process. The results showed that the Ni/N-C-DS catalyst exhibited smaller metallic Ni nanoparticles, more dispersed Ni species, and richer pore structures. At a reaction temperature of 800 °C, the Ni/N-C-DS catalyst exhibited satisfactory DRM catalytic activity and stability, with CH4 and CO2 conversion rates reaching 82 and 85%, respectively. The H2/CO ratio approached 1, and no deactivation was observed during 300 h of continuous operation. A thorough study of the catalyst’s structure–activity relationship revealed that the high dispersion of Ni0 in the Ni/N-C-DS catalyst was the main source of high activity for the DRM reaction, while the high stability in the later stage (80–300 h) of the DRM reaction was mainly attributed to the synergistic effect between the in situ reduced Ni0 and the initially highly dispersed Ni0.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Zhikuan Liu,Quan Diao,Ziyang Zheng,Heng Liu,Muen Yang,Genxing Zhu,Xueling Wu,Yuanyuan Li,Xiumei Xu,Quan Huang,Mingli Jiao
Lanthanum (La) was incorporated into modify α-Fe 2 O 3 porous nanosheets via the smoldering solvothermal combustion method, and applied to establishing a gas sensor with high responsivity and rapid recovery. Material characterization revealed successful synthesis of the α-Fe 2 O 3 porous nanosheets with uniform incorporation of La. The introduction of La modulated both the morphology and pore size of the α-Fe 2 O 3 nanosheets, while also enhancing the oxygen vacancy content and specific surface area. Gas sensitivity testing demonstrated that the modified α-Fe 2 O 3 porous nanosheets exhibited superior gas-sensitized properties. Specifically, the Fe 2 O 3 /La-5 % exhibited a response of 81.55–100 ppm n-butanol at 275 °C, which was 8.43 times higher than that of pure α-Fe 2 O 3 (response value of 9.67), as well as excellent selectivity, fast response and recovery. Further analysis using UV-Vis spectrophotometry and electrochemical testing elucidated the mechanism underlying the enhanced gas-sensing performance, indicating that La doping influenced the microstructure and oxygen vacancy concentration of Fe 2 O 3 . The green, straightforward, and cost-effective synthesis method, coupled with the excellent gas-sensing performance, provides a theoretical basis for the advancement of high-performance n-butanol sensors.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN MEDICINE
·
2026
·Vol. 37
·期 1
·32
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IF 4.5
Yuanzheng Wang,Qilin Jiang,Xin Huang,Shaohong Wu,Jinlong Li,Jian Cao,Zhongxing Liu
The development of bone repair scaffolds has long been a research hotspot in tissue engineering. Owing to its unique capability for personalized customization of scaffold geometry and microstructure, 3D printing technology has been extensively adopted for fabricating bone repair scaffolds. Poly-L-lactic acid (PLLA), endowed with favorable biodegradability, excellent biocompatibility, and reliable in vivo safety, is widely used as a matrix material for 3D printed bone repair scaffolds. PLLA is a bioinert polymer characterized by inferior cell adhesion and osteogenic differentiation capabilities. To mitigate this bioinertness limitation, the present study employed N-methylpyrrolidone (NMP) etching to modify the surface of 3D-printed PLLA bone repair scaffolds. Following NMP etching for 1–24 h, the originally smooth scaffold surface evolved into a hierarchical, petal-like gradient microstructure, accompanied by a marked increase in surface roughness. Correspondingly, the hydrophilicity of the treated scaffolds was also enhanced. Differential scanning calorimetry (DSC) and X-ray diffraction (XRD) analyses further confirmed that the crystallinity of PLLA in the scaffolds was significantly enhanced. Concomitantly, the modified scaffolds exhibited a marked improvement in adsorption capacity for green fluorescent protein (GFP), while the adhesion and proliferation of MC3T3-E1 on their surface were also significantly promoted. In vivo animal experiments demonstrated that the NMP-etched scaffolds could accelerate the process of bone defect repair. Collectively, surface modification of 3D-printed PLLA bone scaffolds via NMP etching enables precise modulation of their physicochemical properties, thereby effectively mitigating the inherent bioinertness limitation of PLLA scaffolds. Graphical
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PubMed
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PHOSPHORUS SULFUR AND SILICON AND THE RELATED ELEMENTS
·
2024
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IF 1.4
Xueting Liu,Kuayue Li,Wenkui Liu,Peng Cui,Fengyu Wei
The multiphase catalysts DMSNs-Cb-X containing NHC-CO2 adducts were synthesized by soft template method that is, first preparing dendritic multi-model pore silica nanoparticles (DMSNs) with central-radial structure, and then grafting imidazoline functional groups, and finally allowing to react with dimethyl carbonate to graft NHC-CO2 adducts. The investigations had the scope to improve the performance and to elucidate the effect of NHC-CO2 adducts on the CO2 cycloaddition reaction. The optimum catalyst DMSNs-Cb-1 and the optimum reaction conditions (200 mg, 100 °C, 10 h) were obtained via thermogravimetric analysis. CO2 cycloaddition reaction with epoxide DMSNs-Cb-1 can convert CO2 and epoxide to cyclic carbonate at ambient pressure without solvent and co-catalysts (1 bar, 100 °C). The reaction proceeds with high yield and high conversion frequency (TOF = 27.4 h−1). The prepared catalyst is easily recovered and still has high activity after five cycles of experiments. The excellent catalytic performance of the obtained catalyst can be attributed to the synergy of hierarchical porous structure and NHC-CO2 adducts acting as CO2 adsorption sites as well as zwitterionic catalytic sites. This work demonstrates an efficient strategy for green conversion of CO2 into cyclic carbonates.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2023
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IF 9.9
Dan Liu,Zicheng Wang,Zichen Guo,Yuan Tian,Cheng Wang
Freestanding electrodes with high energy density and cycle stability have attracted attention on the development of lithium-sulfur (Li-S) batteries. However, both severe shuttle effect and sluggish conversion kinetics hinder their practical applications. Herein, we employed the electrospinning and subsequent nitridation processes to prepare a necklace-like structure of CuCoN 0.6 nanoparticles anchored on N -doped carbon nanofibers (CuCoN 0.6 /NC) as freestanding sulfur host for Li-S batteries. Such bimetallic nitride boosts chemical adsorption and catalytic activity throughout detailed theoretical calculation and experimental electrochemical characterization. The three-dimensional conductive necklace-like framework could provide abundant cavities for realizing high sulfur utilization and alleviating the volume variation, as well as fast lithium-ions diffusion and electron transfer. The Li-S cell with the S@CuCoN 0.6 /NC cathode delivers a stable cycling performance with a capacity attenuation rate of 0.076% per cycle after 150cycles at 2.0C and an exceptional capacity retention of 657 mAh g −1 even at a high sulfur loading of 6.8 mg cm −2 over 100cycles. The facile and scalable method can help promote the widespread application of fabrics.
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CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Lingfeng Li,Yandi Wen,Guokang Han,Yuxin Liu,Yajie Song,Wei Zhang,Jia Sun,Lei Du,Fanpeng Kong,Yulin Ma,Yunzhi Gao,Jiajun Wang,Chunyu Du,Geping Yin
Developing advanced non-precious metal catalysts towards acidic oxygen reduction reaction (ORR) is critical for electrochemical energy conversion devices. Fe-N-C catalysts are demonstrated to be the most promising alternatives to platinum-based catalysts for ORR. Herein, Fe single atoms (SAs) coordinated by pyridinic nitrogen catalysts (denoted as Fe-pyridinic N-C) are synthesized through pyrolysis of ZIF-8 encapsulating ferrocene. Owing to the synergistic effects between Fe SAs and pyridinic N, Fe-pyridinic N-C exhibits remarkable ORR activity and outstanding stability in acid media, evidenced by golden kinetic current density of 9.71 mA cm −2 at 0.8 V, along with only 21 mV decrease in half-wave potential after 20,000 cycles. Theoretical calculations demonstrate that pyridine-type N possesses stronger binding energy with Fe SAs compared with pyrrole-type N, in other words, high pyridinic N content will help stabilize the catalyst. This study will be of great significance for the development of non-noble metal catalysts towards ORR with enhanced stability in acidic media.
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Materials Science & Engineering C-Materials for Biological Applications
·
2017
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IF 4.164
Guihua Cui,Yu Bai,Wenliang Li,Zhengguo Gao,Shuiying Chen,Nannan Qiu,Toshifumi Satoh,Toyoji Kakuchi,Qian Duan
A series of chain-end functional polymers composed of poly( N -isopropylacrylamide) (PNIPAM) and 2-amino-2-deoxy- d -glucopyranose( d -glucosamine, GA) was synthesized via atom transfer radical polymerization (ATRP). Novel fluorescent complexes of glucosamine-PNI- PAM/Eu(III) were then formed by chelation of the polymers and europium(III) ions. The aqueous solutions of the polymers and its Eu(III) complexes exhibited a lower critical solution temperatures (LCSTs), and which were approximately equal to body temperature. Cell viability assays suggested that these thermosensitive polymers and Eu(III) complexes showed excellent biocompatibility in vitro.
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危险品化学品经营许可证（带存储）