Nanomaterials
·
2024
·Vol. 14
·期 10
·866
·
IF 4.4
Guiming Liu,Zhao Huang,Jiujie Xu,Bowen Zhang,Tiesong Lin,Peng He
In the evolving landscape of portable electronics, there is a critical demand for components that meld stretchability with optical transparency, especially in supercapacitors. Traditional materials fall short in harmonizing conductivity, stretchability, transparency, and capacity. Although poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) stands out as an exemplary candidate, further performance enhancements are necessary to meet the demands of practical applications. This study presents an innovative and effective method for enhancing electrochemical properties by homogeneously incorporating Ru(III) into PEDOT:PSS. These Ru(III) PEDOT:PSS complexes are readily synthesized by dipping PEDOT:PSS films in RuCl3solution for no longer than one minute, leveraging the high specific capacitance of Ru(III) while minimizing interference with transmittance. The supercapacitor made with this Ru(III) PEDOT:PSS complex demonstrated an areal capacitance of 1.62 mF cm−2at a transmittance of 73.5%, which was 155% higher than that of the supercapacitor made with PEDOT:PSS under comparable transparency. Notably, the supercapacitor retained 87.8% of its initial capacitance even under 20% tensile strain across 20,000 cycles. This work presents a blueprint for developing stretchable and transparent supercapacitors, marking a significant stride toward next-generation wearable electronics.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Cleaner Production
·
2024
·
IF 9.7
Yue Ma,Chao Hu,Yanru Jin,Honggang Zhen,Junhu Wu,Lin Yang
Typical industrial solid waste, red mud, contains significant amounts of ruthenium, an important secondary resource for valuable metals. This study aimed to investigate the efficient leaching of ruthenium from red mud by comparing the leaching efficiency of different inorganic acids. The results indicated phosphoric acid exhibited the highest leaching effect compared to sulfuric acid, nitric acid, and hydrochloric acid. The influences of leaching temperature, phosphoric acid concentration, leaching time, liquid-solid ratio, and stirring speed on the leaching of ruthenium were examined. Under the conditions of a leaching temperature of 90 °C, a phosphoric acid concentration of 5 mol/L, a leaching time of 6 h, a liquid-solid ratio of 12:1, and a stirring speed of 500 rpm, ruthenium leaching efficiency of 93.53%. SEM-EDS characterization of red mud before and after leaching confirmed that most of the ruthenium is transferred into the liquid phase, while a small portion remains in the leach residue. X-ray diffraction, Fourier transform infrared spectroscopy, and Raman spectra analyses also revealed significant changes in the mineral structure of red mud during leaching, along with the presence of recoverable iron, aluminum, and calcium in the leach solution. Furthermore, the shrinkage kernel model described the kinetics of ruthenium leaching. The leaching process of ruthenium is primarily governed by chemical reactions at temperatures of 40–60 °C, with an activation energy of 57.36 kJ/mol, as expressed by the kinetic equation 1 − ( 1 − α ) 1 3 = e ( 17.49 − 57360 RT ) × t . At temperatures of 70–90 °C, the leaching process is controlled by chemical reactions and solid film diffusion, with an activation energy of 39.80 kJ/mol, as expressed by the kinetic equation ( 1 / 3 ) ln ( 1 − α ) + [ ( 1 − α ) − 1 3 − 1 ] = e ( 11.22 − 39800 8.314 T ) × t . These findings provide innovative insights into the recovery of ruthenium resources and the comprehensive utilization of red mud.
研究领域:
冶金学
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环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Catalysis Science & Technology
·
2019
·Vol. 10
·期 2
·440-449
·
IF 5.726
Pengqi Zhu,Jin Zhang,Jie Wang,Peng Kong,Yunwei Wang,Zhanfeng Zheng
Hydroxyl coordinated ruthenium dispersed on the surface of γ-Al2O3 can be applied to the selective oxidation of amines with light irradiation and an atmospheric pressure of O2 at room temperature. Sunlight is also an effective light source for the selective aerobic oxidation of primary amines to corresponding nitriles. The high photocatalytic activity and selectivity over Ru/γ-Al2O3 originate from the adsorption of amines and imine intermediates on the abundant surface OH groups of the photocatalyst and further formation of Ru–amide species by ligand exchange of adsorbed amines and imine intermediates with adjacent exposed active Ru sites. Light is introduced to the system successfully via the formation of Ru–amide species, which are used as the light absorption sites of the photocatalytic selective oxidation of amines. Primary amines are directly converted to corresponding nitriles via a two-step oxidative dehydrogenation process.
研究领域:
化学工程
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材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2020
·
IF 7.1
Yu-Feng Sun,Jing-Jing Li,Feng Xie,Yan Wei,Meng Yang
Metal oxides nanomaterials are limited in electrochemical detection of heavy metal ions (HMIs) because of their poor conductivity and less active sites, which hinders electron transport and reduce the redox rate of HMIs, making it difficult to achieve sensitive and accurate detection of trace pollutions. Herein, Ru-loaded cerium dioxide nanocubes (Ru/CeO 2 ) with rich oxygen vacancies (OVs) was developed to construct electrochemical sensing interface. An unexpected sensitivity of up to 2169.8 μA μM −1 cm -2 was obtained with a detection limit of 0.019 μM in the detection of Hg(II). The predominantly exposed highly active (100) crystal facets and abundant OVs on the surface of CeO 2 nanocubes, as well as Ru nanoparticles with excellent metal activity, providing large amounts of reactive oxygen species and active sites, thereby enhancing the conductivity and adsorption capacity of the nanocomposites. Ultimately, the outstanding electrochemical signal was achieved by promoting the redox reaction of Hg(II). In addition, the proposed method shows the excellent stability and high anti-interference ability, and the accurate analysis of Hg(II) in real water samples was realized. This finding provides a good strategy for the development of nano-metal oxide with OVs for the reliable determination of trace heavy metal substance.
研究领域:
材料科学
·
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2019
·
IF 5.589
Abuduheiremu Awati,Halidan Maimaiti,Shixin Wang,Bo Xu
Photocatalytic synthesis of ammonia is a kind of compelling and challenging nitrogen fixation method. In this paper, we extract the small-sized graphite-like carbon layer in the coal by organic solvent extraction method using HNO3 pretreated coal as a precursor. Then the coal-based carbon nanosheets (CNs) containing with Ca 2+ , Ti 4+ , Fe 2+ , Al 3+ , Si 4+ , C, N, O and other metal/non-metal ions was obtained under the assistance of the ultrasonication. The composite catalyst Ru/CNs was prepared by in situ loading the ruthenium (Ru) nanoparticles reduced from RuCl3·3H2O onto the as prepared CNs. The structure was characterized and the photocatalytic nitrogen fixation into ammonia performance under ambient temperature and atmospheric pressure was studied. The results show that the composite catalyst Ru/CNs with uniform dispersion of Ru nanoparticles on CNs has excellent photocatalytic nitrogen fixation activity, a nd the NH3 yield reaches 221.3 μmol/L after the reaction for 4 h. At the same time, the as prepared catalyst had quite good stability, and the NH3 yield remained substantially unchanged in 5 cycle experiments.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Zhou Yang,Meng Xiang,Yunfeng Zhu,Jia Hui,Yong Jiang,Shuang Dong,Chengbin Yu,Junfei Ou,Hengfei Qin
Pt/C is a practical electrocatalyst for oxygen reduction reaction (ORR) in metal-air batteries and fuel cells, however, also suffers the drawbacks of high cost and instability, which have propelled people to search for new substitutes, such as single-atom metal electrocatalysts. Herein, C 4 N was firstly synthesized from 2,3-diyldiamine phenazine via one-step hydrothermal method rather than the traditional way that two monomers react in organic solvent, and then loaded with single-atom metal (Pt or Ru) to form new electrocatalysts. The so-formed M@C 4 N (M = Pt or Ru) electrocatalysts show more excellent ORR performances with higher half-wave potential and better stability and methanol tolerance as compared with the commercial Pt/C. Specifically, the half-wave potential of 1%Pt@C 4 N and 0.5%Ru@C 4 N is 0.861 V and 0.828 V, respectively. Density functional theory calculations reveal that 1%Pt@C 4 N has stronger adsorption of reactant species and faster kinetics than 0.5%Ru@C 4 N in ORR pathway.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2023
·
IF 13.6
Hanqin Weng,Yi Wang,Fuhai Li,Yusa Muroya,Shinichi Yamashita,Sheng Cheng
Recovery of platinum group metals (PGMs) including palladium (Pd), rhodium (Rh), and ruthenium (Ru) from high-level radioactive liquid waste (HLLW) possesses enormous environmental and economic benefits. A non-contact photoreduction method was herein developed to selectively recover each PGM from HLLW. Soluble Pd(II), Rh(III), and Ru(III) ions were reduced to insoluble zero-valent metals and separated from simulated HLLW containing neodymium (Nd) as a representative for lanthanides , another main component in HLLW. Detailed investigation on the photoreduction of different PGMs revealed that Pd(II) could be reduced under 254- or 300-nm UV exposure using either ethanol or isopropanol as reductants. Only 300-nm UV light enabled the reduction of Rh(III) in the presence of ethanol or isopropanol. Ru(III) was the most difficult to reduce, which was only realized by 300-nm UV illumination in isopropanol solution. The effects of pH was also studied, suggesting that lower pH favored the separation of Rh(III) but hindered the reduction of Pd(II) and Ru(III). A delicate three-step process was accordingly designed to achieve the selective recovery of each PGM from simulated HLLW. Pd(II) was reduced by 254-nm UV light with the help of ethanol in the first step. Then Rh(III) was reduced by 300-UV light in the second step after the pH was adjusted to 0.5 to suppress the Ru(III) reduction. In the third step, Ru(III) was reduced by 300-nm UV light after isopropanol was added and the pH was adjusted to 3.2. The separation ratios of Pd, Rh, and Ru exceeded 99.8%, 99.9%, and 90.0%, respectively. Meanwhile, all Nd(III) still remained in the simulated HLLW. The separation coefficients between Pd/Rh and Rh/Ru exceeded 56,000 and 75,000, respectively. This work may provide an alternative method to recover PGMs from HLLW, which minimize the secondary radioactive wastes compared with other approaches.
研究领域:
环境科学
·
核化学与放射化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED CLAY SCIENCE
·
2023
·
IF 5.6
Jiwen Si,Ruifeng Guo,Yan Zhang,Weikun Ning,Yanbin Sun,Wenqing Li,Shiding Miao
The Linde A-Type zeolite (LTA zeolite) was synthesized from ball clay through two steps of calcination at 600 °C with the addition of NaOH/Al(OH) 3 in a mass ratio of 1:1.2/0.43 and hydrothermal treatment at 60 °C for 48.0 h. A certain amount of 3.0 wt% Ru 3+ was introduced before the hydrothermal treatment, and the Ru 0 -nanoparticles were in-situ fixed in the zeolite in a facile way. The synthesized materials were characterized by X-ray diffraction, infrared spectroscopy , field-emission scanning electron microscopy, transmission electron microscopy , and X-ray photoelectron spectroscopy. The zeolite with LTA structure was successfully synthesized from ball clay, and the catalytic performance was checked by using hydrogenation of benzene at 150 °C and P H2 = 5.0 MPa, and the turnover frequency (TOF) of cyclohexane reached 4000 mol/(mol·h). The good stability was demonstrated by the high conversion of 94.0% and 98.0% of benzene after cycling use for many runs of catalysis and calcination at 550 °C.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
Molecular Catalysis
·
2018
·
IF 0
Zhongzhe Wei,Xuefeng Li,Jiang Deng,Jing Wang,Haoran Li,Yong Wang
The catalytic transformation from levulinic acid (LA) into γ-valerolactone (GVL) is of great interest as it is an impressive strategy to convert lignocellulosic platform chemical into high value-added compounds. Herein, a novel heterogeneous catalyst made of Ru nanoparticles (NPs) supported on N-doped hierarchically porous carbon from biomass, Ru/NHPC, was shown to be highly active, selective and stable in this transformation. The reaction can proceed smoothly under mild conditions in aqueous media even at room temperature. The catalyst Ru/NHPC could be recycled for 13 consecutive runs exhibiting no obvious activity decay, much better than that of Ru NPs supported on activated carbon. The process offers an efficient, environmentally responsible, and safe approach to high production of GVL.
研究领域:
化学工程
·
可再生能源
·
环境科学
✓ 已验证
产品关联
DOI
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2022
·
IF 24.319
Lingxin Peng,Liang Su,Xu Yu,Rongyan Wang,Xiangzhi Cui,Han Tian,Shaowen Cao,Bao Yu Xia,Jianlin Shi
Developing efficient electrocatalysts is of significance for hydrogen production in acid electrolyte. In this work, we report a facile decoration of ruthenium species onto tungsten oxides to construct the Mott-Schottky heterojunction electrocatalyst for hydrogen evolution. The resultant Ru-WO 2.72 hybrid exhibits a superior Ru-based mass activity of 161.6 times higher than that of commercial Ru/C for hydrogen evolution, featuring a Tafel slope of 50 mV dec −1 and 40 mV overpotential at the current density of 10 mA cm −2 . The uniform distribution of Ru species triggers a strong electron transfer across the Ru-WO 2.72 Schottky barrier, resulting in a largely increased local electron density on the active Ru surface. Such electron enrichment induced by the Mott-Schottky effect at the metal-metal oxides interface is responsible for enhanced hydrogen production. This work demonstrates an effective strategy by Mott-Schottky effect to regulate electron distribution, which would evoke more inspiration in designing efficient electrocatalysis and beyond.
研究领域:
电化学
·
催化材料科学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2023
·Vol. 13
·期 30
·21063-21070
·
IF 3.9
Yudan Zhong,Yulong Ma,Yonggang Sun,Liqiong Wang,Yuanyuan Li,Feng Lin,Yingbo Zhu
The lignin oil produced by rapid pyrolysis of lignin is considered a promising liquid fuel source. Hydrodeoxygenation (HDO) is a kind of efficient method to upgrade the lignin oil, and a high-performance catalyst is key to the hydrodeoxygenation of lignin oil. In this study, a high dispersion and small size Ru nanoparticle loaded N-doped carbon catalyst was derived by the direct pyrolysis of a mixture of ruthenium trichloride and melamine, and it could efficiently convert lignin oil. The lignin oil was completely transformed at 240 °C and 1 MPa H2, and 36.58% cyclohexane was obtained. The formation, surface area, and nitrogen species of the catalyst could be controlled by changing the precursor of the nitrogen-doped carbon support. The percentage of pyridine nitrogen possessed with melamine as a nitrogen–carbon precursor (31.35%) was much higher than that with urea (16.47%) and dicyandiamide (8.20%) as nitrogen–carbon precursors. The presence of pyridine nitrogen could not only serve as the coordination site for even dispersity and stability of Ru nanoparticles but also regulated the electron density of Ru nanoparticles (NPs) and increased the active site Ru0 through electron transfer.
研究领域:
化学工程
·
催化材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Yuefan Zhang,Jie Li,Cheng Wang,Dongmei Liu,Rui Yu,Changqing Ye,Yukou Du
Fabricating 2D nanomaterials with heterogeneous structure is a feasible way to improve catalytic performance owing to its large surface area and tunable electron structure. However, such a category has not been widely reported in the field of alcohol oxidation reaction (AOR). In this work, we reported a new type of heterostructure nanosheet with Ru nanoparticles decorated around the edge of PdRu nanosheets (Ru-PdRu HNSs). Particularly, strong electronic interaction and sufficient active sites attributed to the construction of heterogeneous interface, is the key to the superior electrocatalytic behavior of Ru-PdRu HNSs towards methanol oxidation reaction (MOR), ethylene glycol oxidation reaction (EGOR), and glycerol oxidation reaction (GOR). Remarkably, owing to the enhanced electron transfer brought by the introduction of the Ru-PdRu heterogeneous interface, these novel nanosheets are highly durable. Apart from being able to maintain the highest current density after 4000 s chronoamperometry test, Ru-PdRu HNSs can be reactivated with negligible activity loss in MOR and GOR test after four consecutive i-t experiments. Impressively, in the EGOR test, after reactivation, the current density is step-wisely increased, making it one of the best AOR electrocatalysts.
研究领域:
材料科学
·
电化学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）