NEW JOURNAL OF CHEMISTRY
·
2025
·
IF 2.5
Yuting Li,Dandan Wang,Yuqin Ma,Fangbin Liu,Hongji Li,Qigming Xu,Haijiao Xie
The reduction of carbon dioxide (CO2) using electrochemical methods is one of the ways to achieve carbon recycling, as the increase in carbon dioxide emissions causes environmental problems. Single-atom dispersed Ni-NC site catalysts have emerged as effective electrocatalysts for the reduction of CO2 to CO. Using ZIF-8 as a carrier, we aim to design a high-performance single nickel-site catalyst by elucidating the structure evolution of NiNx sites during thermal activation as well as other key external factors such as the carbon particle size and nickel content. The pyridine N active sites generated after calcination have higher activity and CO selectivity. The catalyst achieved up to 99.6% CO generation at −0.88 V vs. RHE, and is one of the best catalysts for the reduction of CO2 to CO. This work demonstrates an effective method for designing efficient electrochemical CO2 reduction catalysts by tuning the surface structure of single-atom anchored carriers.
研究领域:
材料科学
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环境科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Richuan Rao,Hanwen Liang,Chunming Hu,Huaze Dong,Xiongzi Dong,Yongqiang Tang,Song Fang,Qiang Ling
Ag-CeO 2 nanoassemblys are prepared with a simple melamine-induced thermal decomposition method. Ag-CeO 2 nanoassemblys have a structure composed of Ag nanoparticles and CeO 2 nanoparticles. For Ag-CeO 2 nanoassemblys, Ag introduction can partially or completely activate lattice oxygen species of CeO 2 nanoparticles and however, the ease of Ag-CeO 2 interface oxygen activation is strongly influenced by their pyrolysis temperature. Ag-CeO 2 nanoassemblys prepared at 350 °C have only partial activation of CeO 2 surface oxygen. If the calcination temperature increases to 400 °C, Ag-CeO 2 nanoassemblys are fully activated to form more reducible interfacial lattice oxygen and to promote their low-temperature reductivity. Although excessive calcination temperature (500 °C) induces full activation of Ag-CeO 2 interface lattice oxygen, Ag-CeO 2 nanoassemblys will construct a new Ag-CeO 2 interface that is relative difficult to reduce, causing a less amount of reducible interface lattice oxygen provided at higher temperature. Ag-CeO 2 nanoassemblys are investigated to reveal the relationship of Ag-CeO 2 interfacial oxygen activation and CO catalytic oxidation performance. Ag-CeO 2 nanoassemblys with more interfacial lattice oxygen provided at lower temperature are found to have higher catalytic activity than that catalyst with the partially or excessively activated interfacial oxygen.
研究领域:
材料科学
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催化化学
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2025
·
IF 5.4
Junjie Ma,Wei Li,Xiaoqi Lan,Zheng Liu,Fenghai Zhou,Mingjun Lu,Guo-Cheng Han
The Na 3 V 2 (PO 4 ) 2 F 3 /Co/N-PC composite was prepared based on nitrogen-doped porous carbon materials containing cobalt (Co/N-PC), which is obtained through high-temperature pyrolysis of bimetallic Co/Zn-MOF. The electrochemical test results showed that the discharge specific capacity of Na 3 V 2 (PO 4 ) 2 F 3 /Co/N-PC composite was 126.66 mAh/g at 0.1C, an increase of 15.6 % compared with Na 3 V 2 (PO 4 ) 2 F 3 /N-PC(109.56 mAh/g). The capacity retention rate was 91.84 % after 100 cycles and the R SEI of the Na 3 V 2 (PO 4 ) 2 F 3 /Co/N-PC composite (48.62 Ω) outperforms that of the Na 3 V 2 (PO 4 ) 2 F 3 /N-PC composite (81.55 Ω). This work applied the metal/carbon hybrid materials obtained through high temperature pyrolysis of bimetallic organic frameworks were employed in sodium-ion batteries, thereby offering enhanced potential for the advancement of sodium-rich phosphoric acid modified materials.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2021
·Vol. 11
·期 34
·20720-20724
·
IF 3.361
Guangyu Zhu,Hanjia Hu,Tao Yang,Junjun Ma,Sanjun Zhang,Xiaohua He
Stable fluorescent silver nanoclusters (AgNCs) were synthesized through one-step UV photoreduction using the multiple carboxyl copolymer poly(methacrylic acid-co-itaconic acid) P(MAA-co-IA) as a novel template. The fluorescence lifetime and the quantum yield of the obtained AgNCs were 1.84 ns and 8.9% in an aqueous solution, respectively. Owing to the multiple carboxyls of the protective P(MAA-co-IA) template, the obtained AgNCs have excellent advantages such as good dispersity, and high stability, which make them suitable for highly sensitive and selective detection of Cu2+ by fluorescence quenching. A good linear relationship exists between the degree of fluorescence quenching for silver nanoclusters and Cu2+ concentration ranging from 0 to 10 μM. The limit of detection (LOD) is 6.36 nM. The result implies that the as-synthesized AgNCs show great potential in the analysis field.
研究领域:
材料科学
·
分析化学
✓ 已验证
DOI
PubMed
高影响因子
INORGANIC CHEMISTRY
·
2022
·
IF 5.436
Peng Miao,Zhen Yu,Weixing Chen,Rui Zhou,Weifeng Zhao,Kai-Jie Chen,Jie Kong
High-performance microwave-absorbing materials (MAMs) derived from metal–organic frameworks (MOFs) have attracted considerable attention due to their tunable chemical composition and microstructure. In this contribution, a core–shell-structured Co/MnO/C nanocomplex was prepared using a CoMn-MIL MOF by a facile hydrothermal synthesis and subsequent pyrolysis process. The optimal microwave absorption (MA) property of the as-prepared Co/MnO/C nanocomplex was achieved by the regulation of the Co2+/Mn2+ molar ratio. The minimum reflection loss (RLmin) of the Co/MnO/C-31 nanocomplex was low to −55.0 dB at 16.2 GHz with a thickness of 1.49 mm, and the effective absorption bandwidth (EAB) was high to 5.95 GHz (12.05–18 GHz) at a thickness of 1.8 mm. The mixed-metal nanocomplex with the core–shell structure exhibited outstanding MA performance, corresponding to the synergetic effect of the magnetic and dielectric loss. It provides a high efficiency strategy for rendering low reflection loss and broad EAB to high-performance MAMs.
研究领域:
材料科学
·
电磁学
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Jing Wen,Jiayi Wang,Jiamin Sun,Baichao Zhang,Chao Suo,Jing Cui,Xuchuan Cao,Yaxin Yang,Yuexian Hao,Shaohui Guo,Xiaojian Bai,Xian-Ming Zhang
Non-extra-artificial destructive detection of trace residual detached wall painting pigments is an important prerequisite for wall paintings restoration work. As the amount available for detection of artifacts is relatively small, the relevant information must be derived through microanalysis. To this end, the trace molecules can be concentrated and enriched for surface-enhanced Raman scattering (SERS). In this work, the ZIF-67 was Ni 2 + -acid etched into Co–Ni layered double hydroxide (LDH) hollow nanocages. After introducing Au nanoparticles (NPs), Au NPs@Co–Ni LDH core–shell structured composites with a very low detection limit for RhB (10 –10 mol L −1 ) were formed. The composites were applied to non-extra-artificial destructive detection of green, red, and blue trace mural mineral pigments, in which the main components were identified as chlorocopperite, vermilion and ultramarine, respectively. This result proves the universality of the composites to mural pigments of different types in different regions. Experimental data and finite element simulation results show that the etching treatment endowed the SERS substrate materials with a concentration effect, which led to more molecules of the substances to be measured aggregating around the Au NPs, enhanced the detection signals of the molecules, and achieved the concentration in the plasmonic field, which in turn improved their adsorption capacity and enrichment function of the target molecules. This work realizes the innovative application of the concentration effect in the SERS detection of ancient mural pigments, which is important for the analysis, identification, and restoration of mural paintings and other cultural relics.
研究领域:
材料科学
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文物保护
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化学分析
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Jie Min,Wei Song,Tianding Hu,Yunfei Zhi,Zhenhao Xia,Tiecheng Zhang,Shaoyun Shan,Hongying Su
Magnetic nanoparticle-supported heterogeneous catalysts have been widely researched in green catalysis, due to their convenient magnetic separation and nanometer effects. Herein, a magnetic Co(III)-Salen heterogeneous catalyst with uniform spherical core-shell structure was synthesized for the chemical fixation of CO 2 into cyclic carbonate based on the sustainable protocol development and green chemistry principles. Fe 3 O 4 @SiO 2 nanoparticles with uniform spherical core-shell structure were prepared by the reverse microemulsion method, and Co(III)-Salen complexes were subsequently immobilized on the resulted Fe 3 O 4 @SiO 2 nanoparticles via covalent bonding, leading to Fe 3 O 4 @SiO 2 @Co(III)-Salen nanocomposites with particle size of 29 nm and saturation magnetization value of 27.2 emu/g. The catalytic performance study indicated that the catalyst exhibited high yield of 99% with selectivity of 100% for the ring-opening addition reaction of CO 2 and epoxide under solvent-free reaction condition. A plausible reaction mechanism was proposed that the Lewis acidic sites of Co(III)-Salen and nucleophilic bromine ion components played synergetic roles in promoting cycloaddition reactions. A stable geometry of the Co(III)-Salen complex and a detailed evidence for the reaction mechanism were provided by the density functional theory (DFT) calculations. Based on their excellent magnetic properties , the Co(III)-Salen nanocomposites could be easily recovered by using an external magnet and reused for 5 times without significant leaching of metal center and loss of catalytic activity.
研究领域:
材料科学
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绿色化学
·
催化反应
✓ 已验证
DOI
高影响因子
CATALYSIS TODAY
·
2022
·
IF 6.562
Mingsheng Luo,Chenmeng Li,Qinglong Liu,Zhi Yang,Yatao Wang,Hongjuan Li
Direct hydrogenation of CO to alcohols through Fischer-Tropsch reaction process is taken great interest in recent years. In this study, a series of β-Mo 2 C/γ-Al 2 O 3 catalyst are prepared to investigate the influence of carbon and molybdenum precursor, calcination temperature, as well as the molar ratio of the carbon precursor to molybdenum precursor compounds on catalyst microstructures and the catalytic performance. The microstructure characteristics of the catalysts were examined with XRD, BET, ICP, SEM and CO-TPD. The performance test of the catalysts for syngas-to-alcohol was investigated in a fixed-bed reactor. Properly excessive amount of hexamethylenetetramine as carbon precursor calcined at a high temperature (≥700 ℃) favors the formation of high crystalline β-Mo 2 C on γ-Al 2 O 3 carrier. Catalysts with different amount of Mo were prepared to study the effect of active metal loading on microstructure and catalytic performance. The results show that the particle size of β-Mo 2 C and CO dissociation adsorption capacity, as well as the CO conversion increases with raised Mo loading. The selectivity of all higher alcohols reached the maximum when 25 % of Mo was loaded.
研究领域:
催化
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化学工程
·
材料科学
✓ 已验证
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2021
·
IF 4.821
Mingyue Wang,Hao Guo,Rui Xue,Qixia Guan,Junye Zhang,Tingting Zhang,Lei Sun,Fan Yang,Wu Yang
Covalent organic frameworks (COFs) offer high surface area, ordered π conjugation system, tunable pore size and structure which are useful for developing electrochemical sensor. However, most COFs were poor conductivity and slow charge transfer rate which restrict their application in electrochemical sensor. Metal-covalent organic frameworks (MCOFs) possess the good electroconductivity and catalytic activity. In addition, the periodic arrays of π clouds of layered 2D structure facilitate charge transport. Here we propose a new strategy to construct a novel electrochemical sensor employing MCOFs (CuP-SQ COF). The fabricated sensor MWCNTs-COOH/CuP-SQ COF/Co NPs/GCE exhibits the excellent performance for the simultaneous determination of DNA base (guanine and adenine) with high sensitivity which can be attributed to the outstanding properties, unique structure and synergistic effect of composites. The wider concentration range of simultaneous quantitive analysis were 0.04 to 130 μM for guanine and 0.06 to 130 μM for adenine . The lower detection limits were 5.5 nM and 7.2 nM (S/N = 3), respectively. This work proves MCOFs can serve as a promising candidate as modified electrode material for developing electrochemical sensor.
研究领域:
生物化学
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材料科学
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分析化学
✓ 已验证
DOI
高影响因子
Frontiers of Chemical Science and Engineering
·
2021
·Vol. 16
·期 4
·498-510
·
IF 4.204
Bo Jinxiao,Li Mei,Zhu Xinli,Ge Qingfeng,Han Jinyu,Wang Hua
The electrochemical conversion of CO 2 -H 2 O into CO-H 2 using renewable energy is a promising technique for clean syngas production. Low-cost electrocatalysts to produce tunable syngas with a potential-independent CO/H 2 ratio are highly desired. Herein, a series of N -doped carbon nanotubes encapsulating binary alloy nanoparticles (M x Ni-NCNT, M= Fe, Co) were successfully fabricated through the co-pyrolysis of mela-mine and metal precursors. The M x Ni-NCNT samples exhibited bamboo-like nanotubular structures with a large specific surface area and high degree of graphitization. Their electrocatalytic performance for syngas production can be tuned by changing the alloy compositions and modifying the electronic structure of the carbon nanotube through the encapsulated metal nanoparticles. Consequently, syngas with a wide range of CO/H 2 ratios, from 0.5:1 to 3.4:1, can be produced on M x Ni-NCNT. More importantly, stable CO/H 2 ratios of 2:1 and 1.5:1, corresponding to the ratio to produce biofuels by syngas fermentation, could be realized on Co 1 Ni-NCNT and Co 2 Ni-NCNT, respectively, over a potential window of −0.8 to −1.2 V versus the reversible hydrogen electrode. Our work provides an approach to develop low-cost and potential-independent electrocatalysts to effectively produce syngas with an adjustable CO/H 2 ratio from electrochemical CO 2 reduction.
研究领域:
材料科学
·
电化学
·
可再生能源
·
催化
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Shanxin Li,Zhiqi Zhai,Yijing Sun,Sichen Guo,Ting Peng,Hongying Yu,Xuzhou Jiang
The development of stealth materials with both efficient corrosion resistance and low-frequency microwave absorption is highly necessary. In this work, neural-structured Co@C/MWCNTs nanocomposites were successfully synthesized through a facile co-precipitation method, followed by a subsequent pyrolysis process. By adjusting the pyrolysis temperature, the pore structure, crystallinity, degree of graphitization, and electromagnetic parameters of the material were optimized. This optimization achieved a multi-mechanism synergistic effect in the low-frequency region (C-band), including impedance matching, dielectric loss, conductive loss, and magnetic loss. The results indicated that NCN-700 achieved a minimum reflection loss ( RL min ) of −64.31 dB at 4.88 GHz. Additionally, the neural-structured Co@C/MWCNTs nanocomposites exhibited significant effectiveness in low-frequency radar stealth applications, while also displaying superior corrosion resistance, self-corrosion potential ( E corr = 0.52 V), and self-corrosion current density ( I corr = 2.58 × 10 −6 A/cm 2 ). These findings suggest the promising potential for neural-structured Co@C/MWCNTs nanocomposites in applications related to low-frequency microwave absorption and corrosion protection.
研究领域:
材料科学
·
电磁学
·
防腐蚀工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CATALYSIS
·
2021
·
IF 7.92
Yunchao Feng,Sishi Long,Guihua Yan,Wenlong Jia,Yong Sun,Xing Tang,Zehui Zhang,Xianhai Zeng,Lu Lin
Developing the active and environmentally friendly non-noble nano-catalysts is highly desired to transform biomass-derived platform into value chemicals. Herein, we report a low-cost and sustainable cobalt/nitrogen-doped carbon catalyst containing both metallic Co and Co-N components exhibits satisfying activity for the oxidative esterification of 5-hydroxymethylfurfural and other investigated alcohols in methanol without the base additive under mild conditions. Experimental results show that an appropriate ratio of Co to Co-N is responsible for the high activity of the Co/Co-N/CN catalysts towards oxidative esterification. Theoretical computational results demonstrate that the Co/Co-N group synergistically promotes electron transfer from the Co adatom to the surface oxygen atoms, facilitates O 2 adsorption and activation on the Co sites, and further reduces the energy barrier for the oxidation of alcohols to aldehydes, all of which contribute to the overall activity of oxidative esterification of alcohols to the corresponding esters. In addition to exhibiting superior intrinsic activity, the as-prepared Co/Co-N/CN catalyst also shows excellent stability and recyclability.
研究领域:
催化
·
材料科学
·
化学工程
·
环境科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）