Nanomaterials
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2020
·Vol. 10
·期 11
·2207
·
IF 4.324
Wan-Cheng Zhang,Meng-Dai Luoshan,Peng-Fei Wang,Chu-Yun Huang,Qu-Quan Wang,Si-Jing Ding,Li Zhou
The self-assembly process of metal nanoparticles has aroused wide attention due to its low cost and simplicity. However, most of the recently reported self-assembly systems only involve two or fewer metals. Herein, we first report a successful synthesis of self-assembled Ag@AuCu trimetal nanoplates in aqueous solution. The building blocks of multibranched AuCu alloy nanocrystals were first synthesized by a chemical reduction method. The growth of Ag onto the AuCu nanocrystals in the presence of hexadecyltrimethylammonium chloride (CTAC) induces a self-assembly process and formation of Ag@AuCu trimetal nanoplates. These nanoplates with an average side length of over 2 μm show a porous morphology and a very clear boundary with the branches of the as-prepared AuCu alloy nanocrystals extending out. The shape and density of the Ag@AuCu trimetal nanoplates can be controlled by changing the reaction time and the concentration of silver nitrate. The as-assembled Ag@AuCu nanoplates are expected to have the potential for wide-ranging applications in surface-enhanced Raman scattering (SERS) and catalysis owing to their unique structures.Keywords:trimetal;self-assemble;nanoplates;AuCu alloy
研究领域:
材料科学
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化学
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产品关联
DOI
PubMed
高影响因子
Crystals
·
2025
·Vol. 15
·期 3
·246
·
IF 2.4
Yazhou Qin,Jiahao Teng,Han Zhang,Fan Li,Yingsheng He
Hollow flower-like multi-metallic nanocrystals have attracted significant research attention due to their exceptional catalytic properties, which stem from their high surface area-to-volume ratio and abundant active sites. Nevertheless, conventional synthesis methods for noble metal nanocrystals typically involve complex procedures or require harsh reaction conditions. In this work, we developed a facile and environmentally benign strategy for fabricating hollow flower-shaped trimetallic nanocrystals at ambient temperature. Our approach employs AgCl nanocubes, derived from AgNO3and HAuCl4, as self-sacrificing templates. Through ascorbic acid-mediated reduction of metal precursors, we successfully synthesized three distinct types of hollow flower-like nanocrystals: AuAgCu, AuAgPt, and AuAgPd. Comprehensive characterization confirmed the well-defined morphology and precise composition control of the as-prepared nanocrystals. The catalytic performance was systematically evaluated through in situ UV–vis spectroscopy monitoring of 4-nitrophenylthiophenol reduction, revealing the following activity trend: AuAgCu > AuAgPt > AuAgPd. This study not only provides a versatile platform for constructing sophisticated multi-metallic nanostructures but also offers valuable insights into the structure–activity relationship of complex catalysts.
研究领域:
材料科学
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催化化学
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产品关联
DOI
高影响因子
JOURNAL OF PHARMACEUTICAL AND BIOMEDICAL ANALYSIS
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2020
·
IF 3.209
Shuyu Mei,Bingru Liu,Xiaoli Xiong,Xu Hun
PtCuCo trimetallic alloys (PtCuCo-TAs) are synthesized by one-step reduction. The chemiluminescence (CL) properties of PtCuCo-TAs are studied systemically. PtCuCo-TAs show good catalyzing for luminol-H 2 O 2 system. A CL platform is developed for the detection of miRNA-21 using PtCuCo-TAs as nanozyme catalyzer. In the CL detection platform, H1 (Hairpin DNA1) is immobilized onto magnetic beads (MBs) firstly. In the presence of miRNA-21, H1 is opened. H2 (Hairpin DNA2) then hybridizes with H1. Meanwhile, a “cleat” in the end of miRNA-21 with a fewer bases complementary is formed to prevent miRNA-21 dissociating from H1. This miRNA-21 hybridizes to another H1. When cpDNA-PtCuCo-TAs which consisted with cDNA (Complementary strand of probe DNA) and pDNA-PtCuCo-TAs (PtCuCo-TAs labeled with probe DNA) are added, the ssDNA region of H1 reacts with the toehold domain of probe DNA and cDNA is released resulting pDNA-PtCuCo-TAs being captured. With this process repeatedly, a lot of pDNA-PtCuCo-TAs are captured onto MBs. After separation and washing, the precipitate and H 2 O 2 are put into the 96-well and luminol solution is injected. The CL signal is produced by PtCuCo-TAs catalyzing luminol-H 2 O 2 system. The amount of miRNA-21 is detected with CL signal. This CL platform performs with limit of detection 0.167 fM and has good selectivity over other RNA.
研究领域:
生物化学
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分析化学
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分子生物学
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产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2022
·
IF 24.319
Dong-Xue Liu,Yi-Tong Zhou,Yong-Fu Zhu,Ze-Yu Chen,Jun-Min Yan,Qing Jiang
Formic acid (FA), as a safe and renewable hydrogen storage material, attracts extensive attention. Herein, an efficient catalyst Au 0.35 Pd 0.5 Ir 0.15 nanoalloy supported on NH 2 -N-rGO has been successfully synthesized and applied for hydrogen generation from FA. It is found by density function theory (DFT) calculation that addition of Ir into AuPd alloy can change the initial adsorption configuration of HCOOH* and thus reduce the energy barrier of rate determining step (RDS) of FA dehydrogenation . As a result, Au 0.35 Pd 0.5 Ir 0.15 /NH 2 -N-rGO displays 100% conversion, 100% selectivity even after 150 days for FA dehydrogenation at 298 K, and the initial turnover frequency (TOF) can reach the recorded value (12781.2 h −1 ) without any additives. More interestingly, it is proved to be a universal method to design the effective catalysts for hydrogen generation from FA by the high activities of other tri-metallic alloys with addition of other high γ elements (such as Pt, Rh, and Ru).
研究领域:
化学
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催化材料
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理论计算
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能源科学
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产品关联
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2023
·
IF 4.5
Xiaoxi Li,Jiajia Li,Dilnur Kurbanjan,Tianhao Yu,Hong Du
Zeolite imidazole frameworks (ZIFs) structures are widely used as an efficient catalyst for metal organic frameworks (MOFs) in electrocatalysis. In this work, the structure of the trimetallic ZIFs sample was rationally designed by the method of doping with Ni 2+ and Zn 2+ . After that, a layer of highly conductive π-π conjugated organic molecules was wrapped on the trimetallic ZIFs sample to form a heterojunction structure of NiZnCo-ZIF@HHTP composite. The activity of oxygen evolution reaction (OER) of NiZnCo-ZIF was improved after it was combined with HHTP. NiZnCo-ZIF@HHTP presents a low overpotential (η ≈ 193 mV @10 mA cm −2 ), a small Tafel slope (97.4 mV dec −1 ) and outstanding stability for OER in 1 M KOH solution. The superior OER performance of NiZnCo-ZIF@HHTP is due to the effect of doping of Ni and Zn to form a trimetallic ZIF material. The synergistic effect of Ni Zn codoped enhances the conductivity of ZIF-67 material. Meanwhile, the π-π conjugation effect of HHTP organic macromolecule can further enhance the electrical conductivity of NiZnCo-ZIF. The result suggests that the co-doping of polymetallic cations and the coating of conducting organic molecules can be vital for modifying ZIFs electrocatalysts. This work provides a meaningful reference value for modifying non-precious metal ZIFs materials in electrocatalysis.
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
FUEL
·
2024
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IF 6.7
Wenfeng Peng,Zhengxing Lv,Wenju Zhou,Bingmin Yan,Shijing Zhao,Lailei Wu,Junshuang Zhou,Huiyang Gou
Creating highly efficient bifunctional transition metal phosphide catalysts for electrochemical water splitting through cost-effective and universal methods remains an elusive challenge. Here we introduce a universal high temperature and high pressure (HTHP) technique that readily produce phase-pure TMPs, including FeNiP, CoNiP, and Fe 2/3 Co 2/3 Ni 2/3 P (CFNP), which can serve as an ideal model for investigating the relationship between electrocatalytic activity, structure, and chemical composition. The crystal structure of obtained CFNP has been carefully determined for the first time by using single-crystal X-ray diffraction (XRD) and XAS simulations. In the structure of CFNP, iron atoms form an MP4 tetrahedron with Co atoms and a 5-coordination pyramid with Ni atoms. This arrangement synergistically induces an electron-deficient state in the metals and an electron-rich state in phosphorus, enhancing CFNP/NF’s bifunctional catalytic effectiveness, achieving low overpotentials of 92 mV and 239 mV at 10 mA/cm 2 in 1 M KOH environment for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), respectively. Moreover, an integrated electrolyzer using CFNP/NF as both electrode components can achieve a current density of 10 mA cm −2 at 1.536 V, showcasing a catalytic activity for overall water splitting comparable to those of phosphide-based electrocatalysts. The HTPH technique opens new possibility for exploring pure-phase multimetallics and high-entropy phosphides as potential multifunctional materials for potential applications.
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
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2023
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IF 4.2
Jie Ding,Zisu Xu,Hongjun Fang,Xinzhen Feng,Weijie Ji
The aim of this study is to achieve a high fraction of monoene in biomass-derived cardanol to manipulate a well-balanced potential of cross-linking and coupling between resin and curing agent for heavy-duty coating. We reported a heterogeneous nonprecious trimetallic catalyst for selective hydrogenation of polyenes in cardanol for the first time. By cointroducing the second and third metal constituents (Cu and Co), and particularly facet controlling as well as Zn doping of Al2O3 substrate, we can accomplish the highly selective hydrogenation of triene/diene into monoene with variable ratio. The larger sized Ni entities with higher electron density on the Al2O3 hexagonal plates are more favorable for activating triene/diene responsible for a high potential of selective hydrogenation. On the other hand, the Ni0 fraction is comparatively lower, while the mean particle size of Ni0 is the smallest with lower electron density on the commercially obtained γ-Al2O3 spherules. The latter kind of Ni entities is more favorable for activating hydrogen to generate highly reactive H species accounting for a strong potential of full hydrogenation. Over a fine-tuned 10% Ni-5% Co-3% Cu/3% Zn-Al2O3-hexagonal plate under the optimized conditions (7.5% cardanol in n-butanol, 2.5 MPa H2, 80 °C, and 3.5 h), as high as 76% monoene can be obtainable. It is worth noting that not only the current catalyst system is more economic but also the reaction becomes kinetically much faster (within 3.5 h). This catalyst system is operational to a large-scale application in the modification of cardanol via selective hydrogenation. Ni–Co–Cu synergism and low-content Zn modification of the Al2O3 (110) facet are essential to achieve the aim of this study.
研究领域:
化学工程
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2025
·
IF 2.5
Fangke Yu,Huiqi Hao,Jie Gou,Haoqing Li
Based on the carbonization of metal–organic frameworks, this study developed and synthesized a catalyst, referred to as tri-metallic MOF carbonization (TMC), that enhanced electron transfer to facilitate the generation of singlet oxygen. For 20 mg L−1 OFX, micro-electrolysis of PMS in the presence of the TMC catalyst demonstrated remarkable degradation efficiency, attaining 90% degradation in 20 minutes, with a reaction rate constant of 0.18 min−1. The system was catalytically active and capable of degrading different types of pollutants with high efficiency over a wide pH range. The doping of Co/Cu metals promoted the production of 1O2 and high-valent metals, leading to a charge transfer between different metals (Cu → Co, Cu → Fe). The oxidation of TMC by PMS led to the hetero-cleavage of the O–O bond and produced high-valent metal–oxygen. CoFe2O4 and CuFe2O4 with spinel crystal structures were observed to exhibit increased content of Co(II) and Cu(II), respectively. Co(II) was found to be used as an active site for activation of PMS to produce 1O2, and Cu(II) facilitated the non-radical pathway of the reaction. Fe(II) generated by high-valent metals via PMS and the oxidative degradation of electron-rich pollutants. Therefore, high-valent metals and 1O2 play crucial roles in the activation mechanism of perovskite monosulfate (PMS).
研究领域:
环境科学
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催化材料
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污染控制
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产品关联
DOI
高影响因子
ADVANCED MATERIALS
·
2025
·
IF 26.8
Siyi Li,Jiaoting E,Xiucheng Zhao,Rui Xie,Jiaming Wu,Lili Feng,He Ding,Fei He,Piaoping Yang
Reactive oxygen species (ROS) play crucial roles in cellular metabolic processes by acting as primary intracellular chemical substrates and secondary messengers for cellular signal modulation. However, the artificial engineering of nanozymes to generate ROS is restricted by their low catalytic efficiency, high toxicity, and off-target consumption. Herein, hetero-trimetallic atom catalysts (TACs) anchored on a stable symmetrical pyramid structure are designed in the presence of N and P surface ligands from cross-linked polyphosphazene interlayer-coated MIL-101(Fe). The 3D network TACs with a uniform dispersion of Cu, Co, and Fe hetero-single atoms effectively tailor the active sites to avoid metal sintering, thereby providing sufficient catalytic activity for ROS blooms. Nanovesicle membranes facilitate the stable accumulation of nanozymes with homologous targeting, recognition, and endocytosis, effectively addressing the potentially high toxicity and off-target defects. Therefore, the outcome of the in situ ROS-bloom acts as a redox signal for directly regulating oxidative stress in the tumor microenvironment. Meanwhile, ROS intervene in the glutathione peroxidase 4, long-chain acyl-CoA synthetase 4, and cysteinyl aspartate specific proteinase-3 pathways as second messengers, fostering the proclivity toward apoptosis and lipid peroxidation-regulated ferroptosis pathway concurrently, thereby highlighting the application prospects of TACs in the biomedical field.
研究领域:
生物医学
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肿瘤学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2024
·
IF 4.1
Yanhui Lu,Chengang Pei,Xu Han,Yong Li,Ho Seok Park,Jung Kyu Kim,Xu Yu
Exploring the transition metal fluoride-based catalysts with highly catalytic activity is of great importance to satisfy the electrochemical oxygen evolution reaction (OER). Herein, the tri-metallic (cobalt, iron, and nickel) fluorides immobilizing on reduced graphene oxide architectures (CoFeNiF-rGAs) are constructed by hydrothermal and low-temperature fluoridation. The hierarchical structure assembled by the π-π configuration of graphene can provide abundant channels for fast ion diffusion and guarantee the uniform loading of metal fluorides. Owing to the hierarchical morphology and the formation of metal fluorides/graphene interfaces, CoFeNiF-rGAs can show excellent OER performance. Only 238 mV of overpotential is required to achieve a current density of 10 mA cm −2 in alkaline electrolyte, and the Tafel slope (78.8 mV dec -1 ) and charge transfer resistance (13.6 Ω) are smaller than the control samples, respectively, implying a fast kinetic behavior during OER. The highly catalytic stability of CoFeNiF-rGAs is confirmed by 1000 cyclic voltammetry and chronoamperometry test for 20 h, and the boosted catalytic mechanism is elucidated by density function theory calculation.
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
EUROPEAN POLYMER JOURNAL
·
2025
·
IF 6.3
Shiyang Wang,Liting Wei,Xinglong Zhao,Lantian Li,Yuxin Gao,Shuang Chen,Yang Yang,Boping Liu,Yulong Jin
A series of mono-, bi- and tri-metallic catalysts including Ind 2 ZrCl 2 /silica, CrO x /VO x /silica and CrO x /VO x /Ind 2 ZrCl 2 /silica were synthesized for C 2 H 4 polymerization in this work. The results show that conventional cocatalyst TiBA could hardly activate Ind 2 ZrCl 2 /silica. However, under the assistance of the surface species over CrO x /VO x /silica, traces of TiBA (Al/metal ＜15, molar ratio) endowed the Zr species with moderate activity. The combined results of XPS, FTIR-pyridine-adsorption and DRS Uv–vis show that the Lewis acidic Cr and V sites could interact with Ind 2 ZrCl 2 and improve the electronic deficiency of Zr center, which is possible to promote zirconocene activation, though direct Si-O-Zr linkage was non-negligible, and redox between Cr(VI)/V(V) and zirconocene existed. The Zr species were responsible for ultra-high molecular weight polyethylene (UHMWPE) synthesis, and the relative content of UHMWPE fractions could be controllably regulated by polymerization temperature, partial pressure of hydrogen and the loading amount of Zr. Generally, these tri-metallic catalysts CrO x /VO x /Ind 2 ZrCl 2 /silica could synthesize trimodal HDPE/UHMWPE in-reactor blends with very broad molecular weight distribution. Meanwhile, owing to the excellent copolymerization ability of zirconcene, preferential distribution of the short chain branches along the ultra-high molecular weight (MW) chains for C 2 H 4 /1-hexene trimodal copolymers was achieved. The rheological results show that the fractions with extreme MW difference in the trimodal polyethylene (PE) exhibited excellent miscibility, and its superiority in processing and mechanical properties over the monomodal PE with similar MW was verified by rheological, tensile and impact tests.
研究领域:
材料科学
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高分子化学
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催化化学
✓ 已验证
产品关联
DOI
高影响因子
ChemElectroChem
·
2021
·Vol. 8
·期 7
·1316-1321
·
IF 4.59
Zhongyuan Yu,Tong Lin,Chunfeng Zhu,Jintang Li,Xuetao Luo
Graphical Design principles : Trimetallic hollow microspheres composed of FeNi nanoparticles and nitrogen-doped carbon-based Ni 2 Mo 3 N are synthesized by using a Prussian blue @ polyoxometalate based metal-organic framework “PBA@POMOF” strategy, and the preparation process of precursors is greatly simplified through reasonable design. When employed as an oxygen evolution reaction electrocatalyst, the NiMoFe@NC700 composite shows high electrochemical performances at low and high current density. Design of efficient and inexpensive oxygen evolution reaction (OER) catalysts is the key to realizing the wide application of water electrolysis in industrial production. Herein, we synthesized trimetallic hollow microspheres composed with FeNi nanoparticles and nitrogen-doped carbon-based Ni 2 Mo 3 N (NiMoFe@NC700) using a “PBA@POMOF” strategy. In order to synthesize the precursor with ideal morphology and structure in the least steps, a polyoxometalate based metal-organic framework (POMOF) is used as a substrate to grow a Ni−Fe-based Prussian blue analogue (NiFePBA) on it. Benefiting from the hollow sphere structure formed by stacking flakes, better charge transfer performance and the synergistic effect between Ni 2 Mo 3 N and Fe 0.64 Ni 0.36 , the final product, NiMoFe@NC700, exhibits low overpotentials of 288 and 360 mV to achieve current densities of 10 and 50 mA cm −2 for OER in 1 M KOH, respectively, which is superior to the benchmark IrO 2 catalyst. This work proposes a facile and effective strategy to synthetize carbon-based polymetallic OER electrocatalysts based on PBA@POMOF.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
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