Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Qiming Li,Hongli Wang,Boran Yang,Yunwei Zhang,Yan Liu,Jinhan Xie,Chengxu Wang,Lixin Chen,Gaofeng Han
With the growing emphasis on sustainable energy and carbon-neutral strategies, the efficient utilization of alcohol has attracted increasing attention. Direct ethanol fuel cells (DEFCs), which convert ethanol into electricity, offer a nontoxic, environmentally friendly, and efficient pathway for green alcohol valorization. The commercialization of DEFCs critically depends on the development of highly active and durable electrocatalysts for the ethanol oxidation reaction (EOR). In this work, we report a green and facile self-reduction method to synthesize surface-clean AuPd alloy nanoparticles (NPs) uniformly anchored on nitrogen and oxygen co-doped porous carbon sheets (AuPd/NOPCS), without the use of external reductants, surfactants, or organic solvents. The high porosity and low reduction potential of NOPCS facilitate the formation of well-dispersed NPs on NOPCS. The resulting AuPd/NOPCS exhibits a significantly enhanced EOR mass activity of 12.68 A mg Pd −1 , surpassing that of commercial Pd/C (1.96 A mg Pd −1 ), AuPd/OPCS (1.81 A mg Pd −1 , OPCS defined as oxygen doped porous carbon sheets), and Pd/NOPCS (4.16 A mg Pd −1 ). Density functional theory (DFT) calculations further reveal that the superior EOR performance of AuPd/NOPCS due to optimized electronic interactions and reduced intermediate adsorption. This work not only advances the rational design of efficient EOR electrocatalysts but also contributes to the broader goal of clean energy production from alcohols.
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ACS Organic & Inorganic Au
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2025
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IF 4.4
Jianyao Kou,Guangyao Yang,Zhixin Yu,Jiachao Liu,Yuhang Xu,Zhuo Xin,Yuxing Huang
The use of heterogeneous catalysts to generate amine compounds through anaerobic N-alkylation of alcohols via hydrogen transfer strategy is a highly promising synthetic strategy, as it can construct C–N bonds under relatively mild and green conditions. Moreover, amine compounds are widely used in the synthesis of pharmaceutical intermediates, agriculture and fine chemicals. In this work, we successfully constructed a novel Co3O4/CeO2 catalyst using the hydrothermal synthesis method and applied it to the N-alkylation reaction of alcohols, achieving up to 99% of the target product yield with broad substrate scope and high catalyst stability. The Ce3+/Ce4+ redox pairs and oxygen vacancies in the CeO2 support with highly dispersed Co species synergistically catalyze the hydrogen borrowing process of alcohols and amines to generate secondary amines with high activity and selectivity.
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PubMed
高影响因子
FOOD CHEMISTRY
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2025
·
IF 9.8
Dangfeng Wang,Yifan Hou,Likun Ren,Yang Jiang,Yuqiong Meng,Rui Ma,Shulin Wang,Zhiteng Liu,Xuepeng Li,Fangchao Cui,Tingting Li,Jianrong Li
Annually, up to 25 % of food globally spoils due to microbial pollution. Traditional antibacterial nanomaterials had issues like high dosage, lacked of catalytic activity, and instability. Therefore, Na/N-doping carbon dots nanozymes (Na/N-CDs nanozymes) was developed to fight spoilage organisms. The structural stability of Na/N-CDs nanozymes was enhanced due to the change of lattice structure. Na/N-doping with the peroxidase-mimetic activity was 4.3 times higher than reported HRP activity. It showed strong antimicrobial activity by catalyzing H₂O₂ into ROS, with a MIC of 0.03 mg·mL −1 . And the catalytic activity was over 32 times higher than precursor substances. In contrast, Fe and Cu-doping CDs with a MIC of 0.5 mg·mL −1 had no nanozyme activity. The results of antibacterial and spoilage assays showed that Na/N-CDs nanozymes antibacteria by damaging cell membranes, degrading DNA, and inhibiting key enzymes, thereby extending the shelf life of salmon fillets by 3 days, indicating potential in aquatic product preservation.
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DOI
PubMed
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
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2025
·
IF 3.7
Shiyi Li,Yiming Ding,Jinjun Wang,Xiaobao Lv,Min Sheng,Zihong Xia
With the acceleration of the energy transition, new synthetic routes for converting alkanes into high-value products are emerging. However, the thermal safety of these new routes may not have been fully considered, potentially leading to dangers during the optimization of reaction conditions. This study reports, for the first time, a reactor explosion incident during the experiment of a new synthetic route for adipic acid: nitric acid oxidation of n- hexane. Differential Scanning Calorimetry (DSC), Accelerating Rate Calorimetry (ARC), and corrective calculations were used to investigate the cause of the explosion. The results indicate that the polyparaphenol (PPL) liner material, which was used for the first time in the experiment, is unlikely to react with the system and cause the explosion. When the nitric acid concentration is increased from 3.7 mol·L −1 to 5.4 mol·L −1 , the thermal stability of the system decreases, and the heat release surpasses the chemical explosion threshold (1000 J·g −1 ). The maximum self-heat rate ( ) increases by at least 7 times, and the maximum pressure rise rate ( ) increases by at least 11 times. This led to the actual pressure in the reactor increasing from 4.96 MPa to at least 11.09 MPa, which far exceeded the rated pressure (3 MPa) and reached the rupture pressure (3.5 to 4 times their rated pressure), resulting in the explosion. This study aims to provide a warning regarding the safety of new synthetic routes involving the nitric acid-organic systems, particularly the conversion of alkanes, to prevent the recurrence of similar incidents.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Xinyue Du,Xinyang Du,Lina Jiang,Tong Liu,Linhu Jin,Kewei Zhang,Mingzhe Zhang
Lung cancer poses a severe threat to human life and health due to its high morbidity and mortality rates. As a unique biomarker in exhaled breath of lung cancer patients, quantitative detection of n-propanol concentration using semiconductor sensors offers a non-invasive, convenient, and rapid alternative to invasive diagnostic methods like tissue biopsy. Metal-organic frameworks (MOFs) possess designable framework structures and excellent catalytic performance, demonstrating significant potential in the field of gas sensing. Herein, we developed a ppb-level n-propanol sensor based on bimetallic MOF-derived hollow In 2 O 3 /Bi 2 O 3 heterojunctions synthesized through a thermal solvent method using MOF as sacrificial templates. The results demonstrate that the In 2 O 3 /Bi 2 O 3 -2 sensor exhibits an ultralow detection limit with a high response value of 1.68–50 ppb n-propanol. Moreover, at 147 °C, it shows rapid response/recovery times (1 s/137 s) and an enhanced response value of 174–100 ppm n-propanol, representing 4.14-fold improvement over pure In 2 O 3 sensors. The sensor also demonstrates exceptional selectivity, reproducibility, and long-term stability. The remarkable gas-sensing enhancement originates from the unique porous hollow structure and interfacial p-n heterojunction formation. This study presents a promising candidate material for ppb-level n-propanol detection.
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高影响因子
JOURNAL OF MATERIALS SCIENCE
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2026
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IF 4.4
Cui Wenfang,Zhu Mingzhu,Sun Yongmei,Zhang Keyu,Ma Mei
The three-dimensional framework for lithium storage endows TiP 2 O 7 with excellent stability and considerable capacity. However, its practical application is hindered by poor electrical conductivity and an unclear understanding of its structural evolution. Herein, we present a nitrogen-doped carbon-coated TiP 2 O 7 composite prepared by a straightforward and scalable surface modification strategy, which exhibits superior rate capability compared to previous reports. Specifically, it achieves specific capacities of 435, 341, and 263 mA h g −1 at current densities of 2, 5, and 10 A g −1 , respectively. Kinetic analysis confirms that the nitrogen-doped carbon coating on TiP 2 O 7 surface significantly accelerates the interfacial charge transfer, leading to a dominant pseudocapacitive behavior. Importantly, ex-situ transmission electron microscopy characterization reveals that the TiP 2 O 7 in the composite evolves into homogeneous nanocrystals after 100 cycles at a low current density of 0.2 A g −1 . By contrast, despite the TiP 2 O 7 transforming into nanocrystals with inconsistent sizes and reduced crystallinity after 1000 cycles at a high current density of 1 A g −1 , the effective coating of N-doped carbon preserves the capacity of the anode at up to 462.6 mA h g −1 . These findings suggest that this universal strategy can significantly enhance the performance of TiP 2 O 7 -based anode materials for lithium-ion batteries. Graphical abstract
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高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
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2026
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IF 5.4
Fan Wang,Yu Zhang,Hu Zhou,Chunfeng Meng,Yanxin Qiao,Biao Hu
Ni-ZIF-67 nanocrystals are hydrothermally grown on polydopamine (PDA) spheres, followed by pyrolysis to yield N-doped carbon sphere-supported NiCo alloy nanoparticles (NiCo@NCS). Systematic characterizations demonstrate that Ni doping is crucial for promoting the electrocatalytic activity toward hydrogen evolution reaction (HER). The NiCo@NCS catalyst exhibits high HER performance, achieving a low overpotential of 276 mV at 10 mA cm −2 , a favorable Tafel slope of 110 mV dec −1 , and exceptional stability. This performance enhancement originates from the synergistic coupling of homogeneously dispersed NiCo alloy nanoparticles, accelerated charge transfer kinetics, and hierarchical pore structure.
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高影响因子
Nanomaterials
·
2020
·Vol. 10
·期 6
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IF 4.324
Fang Peng,Yan Sun,Weiwei Yu,Yue Lu,Jiaming Hao,Rui Cong,Jichao Shi,Meiying Ge,Ning Dai
In this work, the compositional optimization in copper oxide/tungsten trioxide (CuO/WO3) composites was systematically studied for hydrogen sulfide (H2S) sensing. The response of CuO/WO3composites changes fromp-type ton-type as the CuO content decreases. Furthermore, thep-type response weakens while then-type response strengthens as the Cu/W molar ratio decreases from 1:0 to 1:10. The optimal Cu/W molar ratio is 1:10, at which the sensor presents the ultrahighn-type response of 1.19 × 105to 20 ppm H2S gas at 40 °C. Once the temperature rises from 40 °C to 250 °C, the CuO/WO3(1:1) sensor presents thep-nresponse transformation, and the CuO/WO3(1:1.5) sensor changes from no response ton-type response, because the increased temperature facilitates the Cu-S bonds break and weakens thep-type CuO contribution to the total response, such that the CuS bond decomposition by a thermal effect was verified by a Raman analysis. In addition, with a decrease in CuO content, the CuO is transformed from partly to completely converting to CuS, causing the resistance of CuO to decrease from increasing and, hence, a weakening mode ofp-CuO andn-WO3to the total response turns to a synergistic mode to it.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2022
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IF 6.371
Hang Che,Yuhao Wu,Xinhua Wang,Haizhen Liu,Mi Yan
The Mg(NH 2 ) 2 -2LiH system is considered as one of the most potential hydrogen storage materials due to its high hydrogen storage capacity (5.6 wt%) and excellent reversible hydrogen adsorption and desorption performance. However, its poor kinetic characteristics of hydrogen absorption and desorption limit its practical application. In this work, Li 3 VO 4 @LiVO 2 was synthesized by a hydrothermal method , and was then introduced into Mg(NH 2 ) 2 -2LiH system to enhance the hydrogen absorption and desorption kinetic characteristics. The results show that the hydrogen storage properties were greatly improved with addition of 10 wt% Li 3 VO 4 @LiVO 2 addition. As for the hydrogen absorption and desorption kinetics, the average hydrogen absorption rate of 10 wt% Li 3 VO 4 @LiVO 2 modified Li-Mg-N-H sample within 20 min at 200 ℃ increased by 95.2% compared with that of the pristine Li-Mg-N-H sample, and the average hydrogen desorption rate of 10 wt% Li 3 VO 4 @LiVO 2 modified sample within 30 min at 180 ℃ increased by 42% compared with that of the pristine sample. The E a of hydrogen desorption decreased from 117.86 kJ/mol to 99.43 kJ/mol, which also indicates that Li 3 VO 4 @LiVO 2 catalyst effectively improved the kinetic performance of hydrogen desorption and desorption of Li-Mg-N-H. Moreover, the hydrogen desorption capacity and hydrogen absorption capacity of 10 wt% Li 3 VO 4 @LiVO 2 modified Li-Mg-N-H increased by 18.4% and 13.8% compared with that of the pristine sample. The catalytic mechanism of Li 3 VO 4 @LiVO 2 was discussed based on XRD , XPS and FTIR analysis results.
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JOURNAL OF POWER SOURCES
·
2017
·
IF 6.395
Li-li Wan,Guo-long Zang,Xin Wang,Le-an Zhou,Tian Li,Qi-xing Zhou
Oxygen reduction reaction (ORR) plays an important role in green energy conversion, although catalysts are necessary for overcoming its sluggish kinetic. Herein, a nanocrystal NiCo 2 O 4 /N-doped graphene composite material showing high ORR electrocatalytic activity is prepared. The resulting NiCo 2 O 4 /N-doped graphene composite (NiCo 2 O 4 -NG/C) combines the advantages of both component materials and shows enhanced ORR electrocatalytic activity (i.e., more positive peak potential and half-wave potential compared with NiCo 2 O 4 ) while having higher diffusion-limited current density values (−5.7 mA cm −2 , 1600 rpm), better tolerance to methanol, and improved stability than 20 wt% Pt/C. NiCo 2 O 4 anchored on N-doped graphene are demonstrated to be nanocrystal with tiny crystalline grain (diameter < 5 nm) and result in large surface area , thereby allowing more active sites to be exposed. Moreover, the potential exposure of high-index planes may be also responsible for the observed high activity of these materials.
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高影响因子
MATERIALS RESEARCH BULLETIN
·
2024
·
IF 5.3
C. Wang,X.Z. Zheng,L. Yue,P.J. Xia,M. Xu,W.B. Dai
The exploration of stable/efficient phosphor for n -UV chip pumped white light-emitting diodes ( w LEDs) remains an arduous task. Herein, a novel series of color tunable Eu 2+ /Tb 3+ /Sm 3+ tridoped Sc-based cyclosilicate phosphors (KBaScSi 3 O 9 : Eu 2+ /Tb 3+ /Sm 3+ ) have successfully designed and obtained via facile solid-state reaction based on comprehensive consideration of rigidly structural network of host, weak electron-phonon coupling strength and spectral adjustability of codopants via energy transfer (ET). The crystallographic occupancies of Eu, Tb and Sm primary in Ba/K, Ba and Ba sites in the monoclinic host, respectively were determined on the basis of the Rietveld refinements and crystal chemistry rules. The photoluminescence (PL) properties were systematically investigated in conjunction with structural analyses, implying that the ‘warm’ white light with excellent thermal stability is stemmed from combination of optimized blue (Eu 2+ ), green (Tb 3+ ) and red (Sm 3+ ) emissions via Eu → Tb → Sm ET strategy. Interestingly, Tb ions play both roles of green light luminescent center and ET bridge to achieve cascade ET for connecting Eu/Sm ion pairs because of the adverse metal-metal charge transfer (MMCT) effect (Eu 2+ + Sm 3+ → Eu 3+ + Sm 2+ ). Furthermore, the phosphor-converted w LEDs (pc- w LEDs), by encapsulating the optimal KBS: 4 %Eu/4 %Tb/6 %Sm with commercial n -UV LED chip, show high thermal stability with satisfactory electroluminescence (EL) performances. These results indicate the KBS: Eu/Tb/Sm phosphors are potential candidates for application in high power n -UV pumped pc- w LEDs.
研究领域:
材料科学
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发光材料
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固态照明
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无机化学
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光电子学
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高影响因子
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
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2022
·
IF 3.667
Yudong Pan,Zhigang Suo,Tongqing Lu
Submerged in an aqueous solution of sodium chloride (NaCl), a poly(N-isopropylacrylamide) (PNIPAM) hydrogel can be in one of two phases: swollen phase and collapsed phase. We measure the equilibrium volume of the hydrogel as a function of temperature T and ionic concentration y . The hydrogel is in the swollen phase when T and y are low, and is in the collapsed phase when T and y are high. We develop a thermodynamic model in which the free energy is a function of volume, temperature, and ionic concentration. The free energy also contains several adjustable parameters, which we best-fit to the experimental data of volume as a function of T and y . For a given pair of T and y , the free energy is a function of volume. This function has a single minimum for some pairs of ( T , y ), but two minima and a maximum for other pairs of ( T , y ). In the former, the single minimum corresponds to either a swollen or a collapsed state. In the latter, the lower minimum corresponds to a state of equilibrium, the higher minimum corresponds to a metastable state, and the maximum corresponds to an unstable state. When the two minima are equal, the hydrogel undergoes phase transition. The condition of phase transition is represented as a curve on the ( T , y ) plane. The thermodynamic model represents the experimental data well.
研究领域:
高分子科学
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软物质物理
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热力学
·
材料科学
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