Nature Communications
·
2025
·Vol. 16
·期 1
·1-9
·
IF 15.7
Zhang Xiu-Feng,Zhang Shi-Nan,Zhang Zhao,Leng Bing-Liang,Lu Kai-Yuan,Chen Jie-Sheng,Li Xin-Hao
Deuterated organic compounds have gained significant attention due to their diverse applications, including reaction mechanism studies, probes for metabolism and pharmacokinetics, and raw materials for labeled compounds and polymers. Conventional reductive deuteration methods are limited by the high cost of deuterium sources (e.g., D₂ gas) and challenges in product separation and D₂O recycling. Electrochemical deuteration using D₂O is promising, but existing methods still suffer from low Faradaic efficiency (FE) and high separation costs. Herein, we report a deuterium ion diffusion-based all-solid electrolyser, featuring a RuO₂ anode for D + generation from pure D 2 O and a Pd/nitrogen-doped carbon-based liquid diffusion cathode (Pd δ+ /NC LDC) with tunable electron deficiencies Pd δ+ /NC to enhance selective deuteration. This system achieves over 99% selectivity for deuterated benzyl alcohol with a FE of 72%, and demonstrates broad applicability for the deuteration of aldehydes, ketones, imines, and alkenes with high FE and selectivity. Moreover, the Pd δ+ /NC-based electrolyser can achieve ten-gram-scale production of deuterated benzyl alcohol over 500 hours, showcasing its potential for high-throughput, solvent-free deuteration reactions in practical applications.
研究领域:
有机化学
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药物化学
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合成化学
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DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2024
·Vol. 48
·期 5
·2210-2218
·
IF 2.7
Zhaoshun Zhan,Qixing Shi,Lei Wang,Jinfeng Shen,Tianyou Bao,Lixin Li,Fanna Meng
To improve the safety and broaden the application scope of polyurethane in coal mines, a dual-functional DOPO/MA/Mel@NC (DMM@NC) composite with flame retardancy and antistatic properties was designed and synthesized via in situ polymerization followed by introduction into polyurethane with a loading amount of 25 wt%, which considerably enabled flame retardancy, antistatic properties, thermal stability, and combustion performance of the polyurethane. By investigating the chemical composition and microscopic morphology of gaseous pyrolysis products and condensed-phase residues of DMM@NC it was found that the residues contain phosphorus-containing compounds, which promote the carbonification and are beneficial to improve the flame retardancy of polyurethane through a condensed-phase flame-retardant mechanism. Consequently, the dual-functional DMM@NC composite with distinguished flame retardancy and antistatic properties is beneficial to improve the safety of polyurethane in coal mines thus expanding its application range.
研究领域:
材料科学
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安全工程
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DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2025
·
IF 5.4
Wei Zhao,Mengyuan Qiu,Yajun Liu,Yingrui Dong,Xiaojing Huang,Siyue Li,Feifei Lin,Yongzhi Xiong,Changzhou Chen
The lack of high-performance, low-cost electrocatalysts is the key challenge for the production of 2,5 furandicarboxylic acid via electrocatalytic oxidation of 5-hydroxymethylfurfural. In this work, we report a novel approach for the preparation of highly dispersible transition metal catalysts loaded by carbon aerogel-loaded via a chitosan-transition-metal-ion coordination. The experimental results demonstrated that all of Ni 2+ , Co 2+ and Cu 2+ were able to coordinate with chitosan to form stable gels, which were then pyrolyzed to obtain highly dispersed transition metal-based catalysts (Co@NC, Ni@NC and Cu@NC) The Cu@NC exhibited the best HMFOR activity with high HMF conversion (nearly 100 %), FDCA selectivity (98.1 %), and Faraday efficiency (95.3 %). Mechanistic studies showed that Cu@NC was able to accumulate more effective oxidatively active species and thus achieve higher HMFOR current density compared to Co@NC and Ni@NC, and that the electrooxidation of HMF at the Cu@NC electrode followed the HMFCA oxidation pathway. This study provides a general and facile strategy for macropreparation of highly dispersible carbon aerogel-loaded transition metal catalysts for efficient electrocatalytic valorization of HMF.
研究领域:
材料科学
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电化学
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DOI
高影响因子
Catalysts
·
2022
·Vol. 12
·期 8
·877
·
IF 4.501
Yidan Fu,Lina Han,Pengfei Zheng,Xianhui Peng,Xianglan Xian,Jinglin Liu,Xiaoyuan Zeng,Peng Dong,Jie Xiao,Yingjie Zhang
It is desirable to prepare low-cost non-noble metal catalysts using a simple and efficient method. Herein, we display for the first time that nitrogen-doped hierarchical porous carbon-supported vanadium nitride (VN/NC/C-x) catalysts can be regulated by dicyandiamide (DCDA). The introduction of DCDA not only effectively controls the pore structure, but also plays an important role in adjusting oxygen vacancies and d-electrons. In addition, DCDA is not only a significant raw material for the N-doped carbon, but also a nitrogen source for the preparation of vanadium nitride. The VN/NC/C-3 catalyst was prepared after optimization of the preparation parameters, and the macro/micro structure demonstrates a superior ORR performance in alkaline media with a positive onset potential of 0.85 V and a half-wave potential of 0.75 V, the limiting current density is as high as 4.52 mA·cm−2, and the Tafel slope is only 75.54 mV·dec−1. The VN/NC/C-3-based Zn–air battery exhibits a highest peak power density (161.82 mW∙cm−2) and an excellent energy density (702.28 mAh·kgZn−1and 861.51 Wh·kgZn−1). This work provides a valuable synthetic approach for the preparation of other transition metal nitride catalysts with a relative economic value and high performance.Keywords:VN/NC/C;N-doped carbon;oxygen vacancies;oxygen reduction reaction;Zn–air battery
研究领域:
材料科学
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电化学
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能源存储与转换
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2024
·
IF 5.8
Ni Wang,Wenbin Li,Guiqiang Cao,Ruixian Duan,Jingjie Pei,Penghui Luo,Jianhua Zhang,Jingjing Wang,Xifei Li
ABSTRACT The “shuttle effect” caused by polysulfide (LiPSs) dissolution and diffusion is a great challenge for sulfur (S) cathode in lithium-sulfur batteries (LSBs). Herein, we have successfully constructed Co/CoV 2 O 6 tandem catalytic heterostructure anchored by N-doped carbon (Co/CoV 2 O 6 /NC) via an impregnation-assisted pyriaolysis method. The “adsorption-transfer-conversion” tandem catalytic mechanism for LiPSs is realized by utilizing the three behaviors of the strong chemical adsorption of CoV 2 O 6 to LiPSs, the strong conversion of Co to LiPSs, and the transport effect of CoV 2 O 6 ←Co interfacial built-in electric field to polysulfide ions. This can effectively suppress the “shuttle effect” by separating the adsorption and conversion process of LiPSs at different active sites. The tandem catalytic characteristic coupled with the interfacial Co-N and V-N bonds among Co, CoV 2 O 6 and NC, the high electrical conductivities of metal Co and NC conducting network, the hierarchical porous structure of polyhedral framework, collectively endow Co/CoV 2 O 6 /NC@S cathode with strong structural stability, weak electrochemical polarization, good electrochemical reversibility and fast electrochemical kinetics. As a result, Co/CoV 2 O 6 /NC@S cathode presents the significantly enhanced electrochemical performance with a high capacity of 558.4 mAh g -1 at 0.2 C after 100 cycles and a low-capacity decay rate of 0.123% per cycle during 300 cycles at 1 C.
研究领域:
材料科学
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电化学
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能源存储
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DOI
高影响因子
Materials
·
2025
·Vol. 18
·期 10
·2251
·
IF 3.2
Linxiang Zhou,Chaoyang Shi,Huaqi Wang,Danyang Wei,Haodong Jin,Haoqi Li,Zhiwei Meng,Mingli Xu
Developing efficient and durable non-precious metal catalysts for oxygen electrocatalysis in fuel cells and zinc–air batteries remains an urgent issue to be addressed. Herein, a bimetallic CoCe-NC catalyst is synthesized through pyrolysis of Co/Ce co-doped metal–organic frameworks (MOFs), retaining the inherently high surface area of MOFs to maximize the exposure of Co-N and Ce-N active sites. The electronic interaction between Co and Ce atoms effectively modulates the adsorption/desorption behavior of oxygen-containing intermediates, thereby enhancing intrinsic catalytic activity. In alkaline media, the CoCe-NC catalyst exhibits E1/2= 0.854 V electrocatalytic capability comparable to commercial Pt/C, along with superior methanol resistance and durability. Notably, CoCe-NC demonstrates an overpotential 84 mV lower than Pt/C at 300 mA cm−2in a GDE half-cell. When the catalyst is employed as a cathode in zinc–air batteries, it demonstrates an open-circuit voltage of 1.47 V, a peak power density of 202 mW cm−2, and exceptional cycling durability.
研究领域:
材料科学
·
电化学
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2024
·
IF 8.1
Meiling Wu,Yang Tao,Yuwei Liu,Sanying Hou,Tiyang Xiao,Qing Fu,Guowen Peng,Lang Shi
In this study, Fe/N co-doped graphene-like honeycomb porous carbon (Fe-NC)was produced and used for the activating PMS to degrade TC. The Fe-NC catalyst has shown high activity in the TC degradation by activated PMS, with an efficiency of up to 94 % in 30 min. while the blank catalyst without N and Fe doping exhibited the lowest performance with 47.3 % TC degradation. Moreover, other operational factors of Fe-NC catalysts were also investigated to evaluate its catalytic activity. The burst experiments and electron paramagnetic resonance (EPR) experiments demonstrated that free radical paths (O 2 ·- ) and non-free radical paths ( 1 O 2 ) coexist inside the Fe-NC/PMS system. The experiment results and degradation mechanism analysis revealed that N species(Pyridine N, Graphite N,Fe-N x ) and iron species (Fe0) were possible to be the active species of catalysts. Furthermore, Fe-NC/PMS system was investigated for possible pathway of TC degradation by liquid mass spectrometry (LC-MS), and the presence of intermediates was analyzed for toxicity magnitude by ECOSAR software.
研究领域:
环境科学
·
催化材料
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产品关联
DOI
高影响因子
AICHE JOURNAL
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2024
·
IF 3.5
Le Zhou,Xin Zhang,Yu Han,Xin Li,Ze-Quan Zeng,Hai-Kui Zou,Yong Luo
The Co@NC catalyst exhibits significant protic solvent preference for hydrogenation of nitriles to primary amines. However, the effect of mixed protic solvents on catalytic hydrogenation has received little attention. Herein, the synergetic solvent effect has been proposed to accelerate the hydrogenation of adiponitrile (ADN) to hexamethylenediamine through H 2 O-ethanol hydrogen bond networks on Co@NC catalyst. Experimental screenings on solvents showed that ADN conversion in H 2 O-ethanol was 1.6 ~ 5.1 times greater than in single solvents. Kinetic models in H 2 O/ethanol ( v W = 0.6), H 2 O, and ethanol showed that the solvents effected on H 2 transformation dominated the reaction. Isotope labelling and kinetic experiments revealed that H 2 O and ethanol acted as co-catalysts through exchanging and transferring hydrogen via hydroxyl groups. Density functional theory calculations confirmed that the energy barrier for proton transfer mediated by H₂O–ethanol was reduced by 0.18 eV compared to proton transfer mediated by H₂O–H₂O dimers.
研究领域:
催化化学
·
材料科学
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产品关联
DOI
高影响因子
ChemPlusChem
·
2025
·
IF 2.8
Chunqiu Zhao,Qiang Chang,Fu Yin,Guowei Niu,Chenghua Zhang,Dan Liu,Bhekie B. Mamba,Alex T. Kuvarega
Graphical To enhance the catalytic performance of Zn−NC in the hydrogenation of CO to dimethyl ether, highly dispersed bimetallic catalysts are synthesized through the pyrolysis different metal-doped ZIF. The incorporation of secondary metals (Mn, Fe, Co, Ni, Cu) leads to distinct variations in catalytic performance. Among them, the introduction of Cu significantly improves catalytic activity. Highly dispersed bimetallic atomic-scale catalysts have garnered significant attention in syngas conversion filed due to the synergistic effects of the precisely structured bimetallic site, which facilitate the effective activation of CO. Despite their potential, synthesizing these catalysts to meet the specific application requirements remains challenging. Herein, various bimetallic catalysts were synthesized through the pyrolysis of the bimetallic ZIF precursors which were prepared by in situ doping of different metals (Mn, Fe, Co, Ni and Cu) into the ZIF-8 structure. In the presence of a highly dispersed and highly loaded Zn, the doping content in the ultimate second metallic catalysts varied between 0.15–1.20 wt % for different metals. The catalysts were systematically characterized using XRD, BET, TEM, XPS, Raman, ICP, and H 2 -TPD techniques. Among them, the Zn−NC regulated with Cu or Ni exhibited superior catalytic performance. Notably, the Cu−Zn−NC catalyst showed the highest activity, achieving a CO conversion of 32.8 % and optimal DME selectivity approaching 95.2 % in CO hydrogenation reactions. These enhanced performance metrics were attributed to the synergetic effects of bimetallic components. The incorporation of Cu not only preserved the original Zn−N structure but also preserved the catalytic performance unchanged. This preparation strategy is expected to filter out new research targets to use in diverse catalytic applications.
研究领域:
催化化学
·
材料科学
·
能源化学
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Xiuting Wu,Caishuo Yin,Mengfan Zhang,Yaqian Xie,Jingjing Hu,Ruilai Long,Xianming Wu,Xianwen Wu
The materials driven by metal-organic frameworks (abbreviated MOFs) and their derivatives can prevent self-aggregation and inherit their original morphology. The adjustable porosity features of pristine MOFs can achieve an outstanding electrochemical performance. Herein, we report a novel cathode material of V 2 O 3 /V 3 O 5 /Zn 2 VO 4 @NC composite (abbreviated ZnVO-800) with hierarchical structure and heterojunction derived from zeolitic imidazolate framework-8 (abbreviated ZIF-8) by self-sacrificed route. The ZnVO-800 cathode undergoes two- step reactions in relation with H + and Zn 2+ synergistic insertion/extraction and exhibits rapid Zn 2+ diffusion kinetics and high electrochemical activity after activation. Specifically, the reversible capacity of the activated electrode reaches up to 314.0 mAh·g −1 at the initial discharge of 0.5A·g −1 as it applies to aqueous zinc ion batteries (abbreviated AZIBs). Remarkably, it exhibits a high reversible capacity of 100.1 mAh·g −1 and an excellent cycleability with a capacity retention of 90.8 % even after 3000 cycles. The electrochemical mechanism reveals that the ZnVO-800 with poor electrochemical characteristics is transformed into Zn x V 2 O 5 ·nH 2 O with high electrochemical activity by in-situ electrochemical activation process. Subsequently, Zn 2+ /H + is reversibly inserted/extracted in the cathode material. The heterojunction with hierarchical structure can not only increase the contact interface between electrolyte and cathode materials, but also shorten the ions diffusion path, which is conducive to rapid dynamics and long-term cycleability.
研究领域:
材料科学
·
电化学
·
能源存储
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产品关联
DOI
高影响因子
FirePhysChem
·
2026
·
IF 5.1
Qianyuan Yi,Xi He,Dandan Ji,Ao He,Chunlin Chen,Jinpeng Shen,Zhaoqian Li,Bo Wu,Chonghua Pei
NC/BNNSs composites with BNNSs addition ranging from 0 wt% to 0.4 wt% were prepared by 3D printing. The microstructure, combustion performance and mechanical properties of NC/BNNSs composites were characterized using field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), atomic force microscopy (AFM), and X-ray photoelectron spectroscopy (XPS), differential scanning calorimeter (DSC), high-speed photography, bomb calorimeter and tensile strength testing. Results show that BNNSs have a diameter ranging from 20–350 nm and a thickness of 2.6 nm. The morphology of NC/BNNSs composites is regular, and there is no obvious interface between the internal layers. With the increase of BNNSs content in the NC/BNNSs composites, its initial thermal decomposition and exothermic peak temperature gradually decrease. Compared with pure NC, the activation energy of NC/BNNSs is significantly reduced after adding BNNSs. The minimum activation energy was observed for 0.1% BNNSs, with a value of 173.3 kJ·mol⁻¹, which is a decrease of ∼123 kJ·mol⁻¹ compared to that of NC. The maximum combustion rate of NC/BNNSs with 0.2% BNNSs was 12.7 mm·s⁻¹, which increased by 3.4 mm·s⁻¹ compared with the combustion rate of NC (9.3 mm·s⁻¹). The heat of combustion gradually decreases, while the tensile strength gradually increases.
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产品关联
DOI
高影响因子
Metals
·
2022
·Vol. 12
·期 9
·1419
·
IF 2.695
Jie Wang,Hongtao Yang,Long Cheng,Pin Gao,Yanchun Li,Dongming Song
To improve the combustion stability and ignition performance of thermite, B/NC/CuO micro particles were prepared from boron (B), nano copper oxide (CuO), and nitrocellulose (NC) as an energetic binder through the electrospray technique. The burning rate dependency on boron content, ambient temperature, and pressure was estimated by compressing B/NC/CuO micro particles into columns. Scanning electron microscopy results show that the sizes of these particles mostly lie in the range of 3–4 μm. The particles are ignitable and burn consistently with minor variations in the conditions: B content (8.3–17%), ambient temperature (−50–55 °C), and ambient pressure (0.02–0.1 MPa). The optimum formula was observed for micro particles with 11 wt% B content. Compared with the ball milling sample, the standard deviation of the burning rate of the electrosprayed sample was reduced by 32%. Combustion is barely affected by ambient pressure. Between −50 °C to 55 °C, the burning rate of B/NC/CuO increases by 14.16% from an initial rate of 13.35 mm⋅s−1. In addition, the laser ignition energy required for B/NC/CuO microparticles was also reduced from 70 to 45 mJ.Keywords:boron;thermite;burning rate;combustion performance
研究领域:
材料科学
·
燃烧学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）