JOURNAL OF ORGANOMETALLIC CHEMISTRY
·
2024
·
IF 2.1
Haijiao Jia,Yuchen Cui,Xiaoqian Yuan,Yanmei Xu,Youxin Li
A kind of magnetic hybrid organic-inorganic nanoparticles containing Ru metal (Fe 3 O 4 @SiO 2 -FPBA-Ru) was prepared. It was spherical with the characteristic lattice fringe of ruthenium atom. The size was in the range of 5–15 nm and it contained 0.30 mmol/g Ru. Its saturation magnetization value was 15.95 emu/g, which could be easily and efficiently recovered from solution through an external magnet. It was also stable below 240°C and hot filtration experiment proved Ru wasn't leaked from Fe 3 O 4 @SiO 2 -FPBA-Ru in 70°C oxidation reaction. It could be recovered and reused at least 7 cycles. The low amount of Fe 3 O 4 @SiO 2 -FPBA-Ru (75 mmol%) could convert the 99 % of 1-phenylethanol to acetophenone under solvent-free system, which verified its green and environment-friendly properties. The yield was exceed that of homogeneous (RuCl 3 , 85 %). Beside this, the TON (5181), TOF (7430 h −1 ) in oxidation of 1-phenylethanol and high conversion yields for a series of oxidation reactions of aromatic secondary alcohols proved the high catalytic ability of Fe 3 O 4 @SiO 2 -FPBA-Ru. These laid a foundation for its industrial applications.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Peng Lu,Lyumeng Ye,Xianhui Yan,Jianhang Huang,Zhixiong Tang,Dongyao Chen,Chaoping Cen
It is challenging for catalytic oxidation of volatile organic compounds (VOCs) due to the existence of HCl in municipal solid waste incineration flue gases. A thorough probe into the deactivation mechanism is imperative but still lacking. Herein, the poisoning effect of gaseous HCl on a Ru-based catalyst for toluene catalytic oxidation was investigated. Toluene conversion and CO 2 selectivity decreased dramatically from 89.3 % and 93.8 % to 15.0 % and 8.0 %, respectively at 250 °C under HCl atmosphere. HCl led to a reduction of low-temperature redox properties, as well as a decrease of BET surface area, surface oxygen content and mobility, resulting in a loss of catalytic activity. HCl combined with active Ru and Mn, thereby restricting the electron transfer between Ru 4+ and Mn 2+ . Moreover, HCl could be oxidized by active oxygen species to form Cl• radical, which subsequently reacted with toluene oxidation intermediates, resulting in the generation of chlorinated compounds, such as chlorobenzene, dichlorobenzene, carbon tetrachloride, and benzyl chloride. These harmful chlorinated compounds predominantly deposited on catalyst surface. The protective role of H 2 O against HCl poisoning was mainly attributed to the competitive adsorption between H 2 O and Cl ions, the washing effect, and the promoting of intermediates oxidation and oxygen activation. It is noteworthy that during toluene oxidation in the presence of HCl + H 2 O, a detectable level of 0.048 ng I-TEQ/Nm 3 PCDD/Fs was observed in the off-gas.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yi-Ran Du,Rui Wang,Qing-Shan Niu,Yi-Yu Tao,Bao-Hua Xu
In this study, the bimetallic RuM-CeO 2 (M = Ni, Fe, Cu, K and Cs) catalysts were facilely fabricated by taking the commercially available CeO 2 (99.95 % metals basis, Aladdin, < 50 nm of diameter) as the support. They displayed distinct catalytic performance, especially the chemo-selectivity, on the methoxycarbonylation of styrene with CO and CH 3 OH. Impressively, Ru 2 Ni 0.6 -CeO 2 provided an up to 90.1 % yield of methyl phenylpropionate with satisfied linear selectivity (L/B = 91/9). The characterization and mechanistic results demonstrated that the doping of proper amount of Ni species enriches the local oxygen vacancy (Vö) at the surface but slightly reduces the charge at Ru sites, thereby modulating the interfacial Lewis acid − base pair (Ru-O-Ce-Vö) for catalysis. It thus enhances the CH 3 OH dissociation, leading to high coverage of OCH 3 species with low adsorption energy and relatively weak acidity. Further, the insertion of CO becomes readily due to the weak Ru-CO affinity at electron-deficient Ru center therein. As such, the apparent activation energies ( E a ) of styrene methoxycarbonylation over Ru 2 -CeO 2 (71.2 kJ mol −1 ) is nearly half-reduced by doping Ni element (Ru 2 Ni 0.6 -CeO 2 : 37.5 kJ mol −1 ). Meanwhile, the competitive side reactions at the surface of Ru 2 Ni 0.6 -CeO 2 is inhibited without sufficient acid strength and acid sites. Both aromatic olefins and cyclic olefins were well tolerated under such a system.
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高影响因子
ANALYTICAL CHEMISTRY
·
2024
·
IF 6.7
Yizhuo Fu,Jingke Pan,Yuhao Liu,Chao Lu
The electrochemiluminescence (ECL) effectiveness of the tris(bipyridine) ruthenium(II) (Ru(bpy)32+) system is hampered by aggregation-caused quenching (ACQ) in optoelectronic systems as a result of π–π accumulation of the aromatic ring structure. In this work, a negatively charged tetraphenylvinyl molecule (TPE-2SO3Na, TPE-4SO3Na) was synthesized to modify the electrode interface, and the π–π accumulation between Ru(bpy)32+ molecules was transformed into the π–π interaction between Ru(bpy)32+ and TPE molecules. Interestingly, the ECL signal intensity of the Ru(bpy)32+-tripropylamine (TPA) system in the presence of TPE-2SO3Na was increased by about 15 times due to the π–π action and electrostatic action. In comparison with traditional physical packaging with porous zeolites, metal–organic frameworks (MOFs), and covalent organic frameworks (COFs), the fabricated electrode interface modification strategy was simple and efficient to avoid π–π accumulation in aqueous solutions. Our success will inspire other researchers to investigate the supramolecular interaction (π–π interaction, electrostatic interaction, hydrophilic interaction, and host–guest interaction) at the electrode interface to amplify the ECL intensities of Ru(bpy)32+.
研究领域:
材料科学
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电化学
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PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2022
·
IF 9.221
Gang-Gang Yang,Xiao-Jun Hu,Wei Liu,Xia Xu
Endoplasmic reticulum (ER) is the origin of lipid droplets (LD). Excessive lipid exposure results in ER stress which associates with many diseases. However, the change of the lipid droplet viscosity under ER stress is still unrevealed. Hence, it is important to develop a viable tool to investigate the lipid droplet viscosity under ER stress. In this study, a novel viscosity-sensitive fluorescent probe Ru(phen-CA) 3 Cl 2 with long-lived phosphorescence, good spectral stability and large stokes shifts was developed. The probe is prominently located at lipid droplet organelles rather than at lysosome and mitochondria, showing highly sensitive to viscosity. The fluorescence intensity is obviously increased with time under the treatment of dexamethasone and rapamycin. In-vitro and in vivo experiments further confirm that this probe can be used for real-time monitoring the changes of lipid droplet viscosity in response to ER stress. This novel probe provides an effective approach to elucidate the viscosity change in lipid droplets under ER stress.
研究领域:
细胞生物学
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生物物理学
·
药学
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高影响因子
DALTON TRANSACTIONS
·
2025
·
IF 3.3
Sourav Mondal,Ya-Shan Huang,Zhong-Ming Sun,John E. McGrady
We report here the synthesis and structural characterisation of the [Ru@Sn12]4- anion, a new member of the icosahedral M@E12 family of endohedral Zintl clusters. The cluster is approximately icosahedral, but a signicant variance in the Ru-Sn and Sn-Sn bond lengths is a result of back-bonding from the Ru center to the Sn12 cage. We use density functional theory to place the structural chemistry of [Ru@Sn12]4- into the wider context of the M@E 12 family.
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PubMed
高影响因子
SENSORS
·
2025
·Vol. 25
·期 7
·1995
·
IF 3.5
Jianhua Zhang,Yunbo Shi,Bolun Tang,Canda Zheng
This paper presents a ZnO-Pt/Ru sensor prepared by a two-step hydrothermal method with in situ-grown ZnO nanorods and doped with Pt and Ru elements by immersion sintering. Characterization results showed that Pt and Ru were successfully modified on the surface of ZnO nanorods. ZnO-Pt/Ru achieved a response of 25–50 ppm H 2 S at the optimum operating temperature of 198 °C. In addition, the lower limit of H 2 S detection of ZnO-Pt/Ru reached 50 ppb with a response of about 10%, indicating a wide concentration detection range. Due to the good catalytic properties of Pt, the recovery characteristics of ZnO at high concentrations of H 2 S were significantly improved. The response time of ZnO-Pt/Ru (30 s) was also significantly shorter than pristine ZnO (56 s), with excellent selectivity. As far as the gas-sensitive enhancement mechanism is concerned, at the macroscopic level, the ZnO surface was modified by Pt and Ru, and this special structure of ZnO-Pt/Ru significantly increased the specific surface area. At the microscopic level, the PN junction formed between Pt/Ru and ZnO provided abundant holes for electron migration.
研究领域:
材料科学
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气体传感技术
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纳米材料
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化学传感器
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PubMed
高影响因子
DALTON TRANSACTIONS
·
2022
·Vol. 51
·期 17
·6778-6786
·
IF 4.569
Min Jiang,Xiaoyue Hu,Pengfei Tan,Jun Pan
Optimizing the architecture of non-polluting, highly efficient, robust, and cost-effective electrocatalysts for the oxygen evolution reaction (OER) is extremely crucial for accelerating the application of water splitting. Herein, a highly green and active OER electrocatalyst composed of Ru nanocrystal modified iron-rich phosphates is successfully developed via a hydrothermal and post-annealing approach. The eco-friendly phosphorus source of lecithin is employed to fabricate transition metal phosphates for the first time, which avoids the use of toxic and dangerous phosphorus sources. Meanwhile, it is found that Ru nanocrystals could form heterostructures with iron phosphates and induce conversion to iron-rich phosphates, which would greatly enhance the conductivity of the substrate and elevate the catalytic activity. As a result, overpotentials of only 250 mV and 290 mV are required to deliver 10 and 100 mA cm−2 using this typical electrocatalyst. Also, the j–t curve shows no distinct variations in current over 45 h at a constant overpotential of 334 mV, indicating the outstanding activity and durability of the catalyst. Furthermore, nickel/cobalt-rich phosphates and phosphides were also acquired using similar experimental procedures, manifesting the wide applicability of Ru actuation. Hence, this work offers a convenient and scalable method for designing highly efficient, green, clean, and cost-effective electrocatalysts for water splitting.
研究领域:
材料科学
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能源化学
·
环境科学
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高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2022
·
IF 12.92
Yiwei Fan,Helong Li,Shihao Su,Jinlei Chen,Chunquan Liu,Shuizhong Wang,Xiangya Xu,Guoyong Song
Lignin, which is the most recalcitrant component of lignocellulosic biomass, is also the most abundant renewable aromatic resource. Herein, reductive treatment of triploid poplar sawdust by the integration of catalytic Ru/C and a base, which afforded high yields of phenolic monomers from the lignin component and a solid carbohydrate pulp, is reported. The introduction of Cs 2 CO 3 led to the generation of C2 side-chained phenols through the cleavage of C β –O and C β –C γ bonds in β–O–4 units in addition to C3 side-chained phenols; the relationship between C2 and C3 was dependent on the base dosage. The reaction conditions, including base species, temperature, time, and H 2 pressure, were optimized in terms of phenolic product distribution, delignification degree, and carbohydrate retention. The carbohydrate pulps generated from reductive catalytic fractionation in the presence of Cs 2 CO 3 were more amenable to enzymatic hydrolysis , indicating that this treatment of biomass constituted the fractionation of biomass components together with the breakdown of biomass recalcitrance.
研究领域:
生物质能
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化学工程
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林业科学
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高影响因子
RSC Advances
·
2021
·Vol. 11
·期 21
·12549-12558
·
IF 3.361
Dengfeng Zhou,Junqi Li,Can Chen,Fangchang Lin,Hongming Wu,Jianbing Guo
An Ru-doped spinel-structured LiNi0.5Mn1.5O4 (LNMO) cathode has been prepared via a simple hydrothermal synthesis method. The as-prepared cathode is characterized via Fourier transform infrared (FTIR) spectroscopy, powder X-ray diffraction (XRD), scanning electron microscopy (SEM), laser particle size distribution analysis, X-ray photoelectron spectroscopy (XPS) and electrochemistry performance tests. The FTIR spectroscopy and XRD analyses show that the Ru-doped LNMO has a good crystallinity with a disordered Fdm space group structure. The disordered structure in the cathode increased and the LixNi1−xO impurity phase decreased when Ru addition increased. SEM shows that all samples are octahedral particles with homogeneous sizes distribution, and the particle size analysis shows that the Ru-doped samples have smaller particle size. XPS confirms the existence of Ru ions in the sample, and reveals that the Ru induce to part of Mn4+ transfers to Mn3+ in the LNMO. The electrochemical property indicated that the Ru-doped cathode exhibits better electrochemical properties in terms of discharge capacity, cycle stability and rate performance. At a current density of 50 mA g−1, the discharge specific capacity of the Ru-4 sample is 140 mA h g−1, which is much higher than that of the other samples. It can be seen from the rate capacity curves that the Ru-doped samples exhibit high discharge specific capacity, particularly at high current density.
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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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Junfeng Wen,Yang Yu,Qijun Pei,Alexis Munyentwali,Teng He,Yunhua Xu,Ping Chen
Sodium phenoxide is considered as one of the potentially promising hydrogen storage materials due to its high hydrogen capacity and enhanced thermodynamic properties. However, efficient catalysts are needed to overcome kinetic barriers of the hydrogenation and dehydrogenation processes. In the present work, an ultrafine amorphous Ru–B alloy catalyst was synthesized by a solid-phase ball milling of RuCl 3 with NaBH 4 and subsequently tested for the hydrogenation of sodium phenoxide in an aqueous solution at room temperature . The conversion of phenoxide is significantly improved by 48.9 % on the Ru 3.9 B alloy catalyst compared with pristine Ru nanoparticles . Kinetic studies revealed that the hydrogenation of sodium phenoxide is of first-order with respect to H 2 pressure and zero-order to the concentration of sodium phenoxide over the Ru 3.9 B catalyst. Characterizations showed that the electronic structure of Ru is well modulated by B, leading to an electron-rich state of Ru. The highly active catalysis may be due to the fine dispersion, amorphous state, and electron-rich state of Ru in the ultrafine alloy.
研究领域:
材料化学
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催化化学
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氢能源存储
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纳米催化
·
物理化学
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高影响因子
ChemSusChem
·
2023
·Vol. 16
·期 8
·e202202128
·
IF 8.4
Shuang Wang,Zhengrong Li,Tao Shen,Deli Wang
Graphical Electrocatalytic HERo in the making : Synthesis of Ru 7 Ni 3 nanoalloys encapsulated within N-doped carbon shells (Ru 7 Ni 3 @NC/C) is achieved for the alkaline HER. It exhibits a current density of 10 mA cm −2 at 16 mV with a Tafel slope of 29.9 mV dec −1 , and robust durability over 10 000 cycles in 1 m KOH. The high HER activity of Ru 7 Ni 3 @NC/C can be attributed to the strong synergistic interaction, N-doped carbon shells structure with high surface area and electrical conductivity. The alkaline hydrogen evolution reaction (HER) is of great significance for the large-scale green H 2 production. Currently, pressing challenges in the fabrication of cost-effective HER electrocatalysts are related to their sluggish water dissociation kinetics. Herein, a facile strategy to accelerate the desorption of HER intermediates and water dissociation is proposed. RuNi nanoalloy confined within N-doped carbon shells (Ru 7 Ni 3 @NC/C) with optimized Ru/Ni ratio and the dicyandiamide dosage was prepared. It displays an overpotential ( η 10 ) of 16 mV, Tafel slope of 29.9 mV dec −1 , and long-term stability over 10 000 cycles. The decent HER performance on Ru 7 Ni 3 @NC/C stems from the core-shell structure that is favoring the exposure of dispersed active sites, and the synergistic effect to promote water capture and dissociation. This work provides insight into the relationship between the HER performance and the electrochemical behavior of the intermediate adsorbed state, and paves an avenue toward rational design efficient electrocatalysts for HER.
研究领域:
材料科学
·
电化学
·
能源转换与存储
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高影响因子
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