APPLIED CATALYSIS B-ENVIRONMENTAL
·
2022
·
IF 24.319
Chuang Li,Haeseong Jang,Min Gyu Kim,Liqiang Hou,Xien Liu,Jaephil Cho
Designing highly efficient Pt-free electrocatalysts with low overpotential for the alkaline hydrogen evolution reaction (HER) remains a significant challenge. In this paper, we successfully construct Ru-incorporated oxygen-vacancy-enriched MoO 2 nanosheets (Ru/MoO 2−x ) for the HER through a “one stone two birds” strategy. This strategy can solve two urgent problems simultaneously, the intrinsic electrochemical activity of original MoO 2 is far from satisfactory and the H 2 O adsorption/dissociation abilities of Ru are weak. Specifically, the oxygen-vacancy-enriched MoO 3 serves as an excellent platform for anchoring and trapping Ru ions. In-depth analyses indicate that the incorporation of Ru nanoclusters induces transition from MoO 3 to MoO 2 , generates oxygen vacancies, and creates Ru-O-Mo sites. The synergistic effect of Ru nanoclusters , Ru-O-Mo sites and oxygen-vacancy-enriched MoO 2 will endow the obtained catalyst excellent electrocatalytic activity. In particular, the optimal Ru/MoO 2−x electrocatalyst delivered a low overpotential of 29 mV at 10 mA cm −2 in a basic electrolyte.
研究领域:
电化学
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材料科学
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催化
·
能源材料
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Huaxing Song,Geqian Fang,Zhaohua Gao,Yang Su,Xiaorui Yan,Jian Lin,Wenhua Wang,Wanzhong Ren,Haisheng Wei
Supported metal catalysts play a significant role in heterogeneous catalysis in liquid phase reaction systems, but they usually suffer from a stability problem. Encapsulation of active metal species without the compromise of catalytic performance has been considered as an effective strategy. Here, we report an ultrastable Ru-based catalyst with particle size of around 1.1 nm for selective hydrogenation reaction. The highly dispersed Ru species are covered by the in situ formed porous N–C–ZnO overlayer, which is induced through the transforming of ZIF-8 shell that derives from a ZnO substrate. The resulting Ru/ZnO@N–C–ZnO catalyst can exhibit good stability in the hydrogenation of p-chloronitrobenzene after 20 cyclic runs with 100% selectivity toward p-chloroaniline. Comparatively, the naked Ru/ZnO catalyst with larger Ru particles shows serious metal leaching issue with inferior stability and poor selectivity. It is revealed that the excellent performance of Ru/ZnO@N–C–ZnO is attributed to the porous overlayer, which strengthens the bonding of Ru nanoparticles on ZnO.
研究领域:
催化
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材料科学
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化学工程
✓ 已验证
DOI
高影响因子
RSC Advances
·
2022
·Vol. 12
·期 5
·3157-3164
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IF 4.036
Yi Xiao,Guofang Wang,Haomin Yi,Suhua Chen,Qinyu Wu,Siyi Zhang,Kexin Deng,Simeng Zhang,Zi-Qi Shi,Xiaoping Yang
Ru(bpy)3Cl2/TPrA is a prominent and widely used ECL system in analytical science. However, the co-reactant TPrA restricts the variety of applications because of its toxicity, volatility, and high cost. Here, we use arginine (Arg) as an alternative co-reactant for Ru(bpy)32+ by taking advantage of its low cost, non-toxicity, and biocompatibility. The mechanism of the Ru(bpy)32+/Arg system is that the deprotonated Arg can react with Ru(bpy)32+ to release emission. The similarity between the Ru(bpy)32+/Arg, Ru(bpy)32+/TPrA, and Ru(bpy)32+/DBAE systems demonstrates that Arg can be used as an alternative co-reactant for Ru(bpy)32+ ECL. As a proof of concept, we achieve an excellent performance for acetaminophen (Ace) detection based on the specificity of Arg and Ace, with excellent linearity, low detection limits, and good recoveries. This work is promising to expand the scope of the Ru(bpy)32+/Arg system and move forward their applications in bioassays.
研究领域:
分析化学
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生物分析
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2020
·
IF 7.1
Pei Zhang,Yao Zhang,Xin Xiong,Yao Lu,Nengqin Jia
A sensitive electrochemiluminescence (ECL) immunosensor was successfully fabricated utilizing Ru(bpy) 3 2+ -doped mesoporous polydopamine (MPDA) for subtle exploration of the diabetes biomarker glycosylated hemoglobin (HbA1c). In this protocol, with the advantages of relatively large specific surface area and good biocompatibility, MPDA nanoparticles are capable of loading more Ru(bpy) 3 2+ to greatly amplify the ECL efficiency during the existence of trinpropylamine (TPA) as common coreactant. The acquired Ru(bpy) 3 2+ @MPDA nanoparticles are used as a beneficial substrate for immobilizing aptamer, thereby specifically recognizing the targeting substance HbA1c as much as possible with high selectivity. It could be noted from the experimental results that the ECL intensity was evidently reduced as the proposed Ru(bpy) 3 2+ @MPDA ECL immunosensor captured HbA1c, which showed the principle of the ECL quenching determination. Under optimal experimental conditions, the prepared Ru(bpy) 3 2+ @MPDA ECL immunosensor exhibited wide linear range from 0.1% to 18.5% with the low detection limit (LOD) of 0.015% (S/N = 3) and the correlation coefficient (R 2 ) of 0.994. Moreover, the Ru(bpy) 3 2+ @MPDA immunosensor displayed high sensitivity and selectivity for detecting HbA1c. Therefore, the as-obtained Ru(bpy) 3 2+ @MPDA ECL immunosensor will open up a new promising platform for highly sensitive bioassay of HbA1c.
研究领域:
生物医学工程
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
Green Energy & Environment
·
2025
·
IF 14.6
Peiya Chen,Xinghao Li,Yuhan Liu,Huai Liu,Rui Zhang,Wenlong Jia,Junhua Zhang,Yong Sun,Lincai Peng
Concurrent activation of lattice oxygen (O L ) and molecular oxygen (O 2 ) is crucial for the efficient catalytic oxidation of biomass-derived molecules over metal oxides. Herein, we report that the introduction of ultralow-loading of Ru single atoms (0.42 wt%) into Mn 2 O 3 matrix (0.4%Ru-Mn 2 O 3 ) greatly boosts its catalytic activity for the aerobic oxidation of 5-hydroxymethylfurfural (HMF) to 2,5-furandicarboxylic acid (FDCA). The FDCA productivity over the 0.4%Ru-Mn 2 O 3 (5.4 mmol FDCA ‧g cat -1 ‧h -1 ) is 4.9 times higher than the Mn 2 O 3 . Especially, this FDCA productivity is also significantly higher than that of existing Ru and Mn-based catalysts. Experimental and theoretical investigations discovered that the Ru single atom facilitated the formation of oxygen vacancy (O v ) in the catalyst, which synergistically weakened the Mn-O bond and promoted the activation of O L . The co-presence of Ru single atoms and O v also promote the adsorption and activation of both O 2 and HMF. Consequently, the dehydrogenation reaction energy barrier of the rate-determining step was reduced via both the O L and chemisorbed O 2 dehydrogenation pathways, thus boosting the catalytic oxidation reactions.
研究领域:
化学
·
催化反应
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Qi Zhang,Liangyun Yu,Chenchen Xu,Jinyong Zhao,Haiyang Pan,Ming Chen,Qi Xu,Guowang Diao
Herein, a kind of Fe 3 O 4 @C@Ru hybrid nanocomposites was successfully synthesized by a three-step process. The as-prepared products were characterized by X-ray powder diffraction, transmission electron microscopy , high-resolution transmission electron microscopy , energy dispersive spectroscopy , X-ray photoelectron spectroscopy, UV–visible diffuse reflectance spectrometry and photoluminescence emission spectrometry . The Ru nanoparticles loaded on the surface of carbon shell on Fe 3 O 4 @C nanospheres were nearly spherical with an average diameter of less than 5 nm. The photodegradation of methylene blue (MB) was carried out under the irradiation of simulated visible light to investigate the catalytic activity of the introduced nanomaterial . The results showed that the catalytic activity of Fe 3 O 4 @C@Ru nanocomposites in the MB photodegradation was higher than that of Fe 3 O 4 nanospheres or of Fe 3 O 4 @C nanospheres, as they could degrade 92.70% of the dye in 140 min of simulated sunlight irradiation without any other oxidant or reductant. The photodegradation reaction was first-order with the rate constant of 0.0176 min −1 at room temperature . The degradation rate of Fe 3 O 4 @C@Ru nanocomposites decreased very slightly after five cycles. Furthermore, they could be easily separated and recycled by using an external magnet. It indicated that the magnetically recoverable Fe 3 O 4 @C@Ru nanocomposites had a very broad application prospect in the field of environmental protection.
研究领域:
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
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Huimin Zhao,Xiaoqiang Liu,Zhenzhen Chi,Shuyuan Chen,Shaoxiang Li,Ziyang Guo,Lei Wang
Lithium–Oxygen (Li–O 2 ) batteries have great potential for promising next generation battery, owing to their high theoretical energy density. However, this system still faces many problems such as poor cycling performance and low coulombic efficiency, which mainly stems from the parasitic side reactions on cathode, the decomposition of electrolyte and the corrosion of Li anode. Herein, a novel gel polymer electrolyte (GPE) containing the polymethyl methacrylate (PMMA) with high stability towards the superoxide molecules and ionic liquid (IL) with the non-volatility (PMMA/IL-GPE) is designed by ultra violet (UV) treatment. PMMA/IL-GPE not only possesses the excellent ion conductivity (0.92 mS cm −1 ), the wide voltage window (not be oxidized until > 4.7 V) and superior leakproof property, but also effectively protects Li anode from O 2 -attacking. Moreover, we have further applied electroplating strategy to synthesize the binder-free Ru-coating N, P co-doped cathode (Ru@NPC), which greatly reduce the side reaction of cathode and reduce the charging overpotential. Hence, the Ru@NPC based Li–O 2 batteries using PMMA/IL-GPE show effectively improved discharge capacity (32793.5 mAh g −1 ). When operated at the limited capacity, this battery can run for over 120 cycles with the low charge overpotential of < 2 V. Moreover, PMMA/IL-GPE-based flexible Li–O 2 batteries also exhibit good performances after different bending conditions.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Science Bulletin
·
2024
·
IF 18.8
Yuanqing He,Chongyang Ma,Shiheng Mo,Chung-Li Dong,Wei Chen,Shuo Chen,Huan Pang,Ren Zhi Ma,Shuangyin Wang,Yuqin Zou
The electrochemical oxidation of 5-hydroxymethylfurfural (HMFOR) in alkaline electrolyte is a promising strategy for producing high-value chemicals from biomass derivatives. However, the disproportionation of aldehyde groups under strong alkaline conditions and the polymerization of HMF to form humic substances can impact the purity of 2,5-furandicarboxylic acid (FDCA) products. The use of neutral electrolytes offers an alternative environment for electrolysis, but the lack of OH − ions in the electrolyte often leads to low current density and low yields of FDCA. In this study, a sandwich-structured catalyst, consisting of Ru clusters confined between unilamellar MnO 2 nanosheets (S-Ru/MnO 2 ), was used in conjunction with an electrochemical pulse method to realize the electrochemical conversion of 5-hydroxymethylfurfural into FDCA in neutral electrolytes. Pulse electrolysis and the strong electron transfer between Ru clusters and MnO 2 nanosheets help maintain Ru in a low oxidation state, ensuring high activity. The increased *OH generation led to a groundbreaking current density of 47 mA/cm 2 at 1.55 V vs. reversible hydrogen electrode (RHE) and an outstanding yield rate of 98.7 % for FDCA in a neutral electrolyte. This work provides a strategy that combines electrocatalyst design with an electrolysis technique to achieve remarkable performance in neutral HMFOR.
研究领域:
电化学
·
材料科学
·
生物质转化
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
·
2022
·Vol. 48
·期 7
·2987-3006
·
IF 3.134
Zhao Yifan,Li Wensi,Rehman Mooeez Ur,Wang Shengping,Li Guobing,Xu Yan
A series of N-modified Ru/N x -AC catalysts were prepared by ammonia treatment method and applied in dioctyl phthalate hydrogenation, which is a cascade reaction system involving partial hydrogenation of aromatic ring and the further saturated hydrogenation of the formed intermediate bis(2-ethylhexyl) cyclohexene-1,2-dicar-boxylate (DH 4 ) to dioctyl di-2-ethylhexylcyclohexane-1,4-dicar-boxylate (DEHCH). N doping was found to be able to increase the nitrogen-containing pyridine groups on the activated carbon (AC) surface, resulting in the abundance of binding sites for anchoring Ru and exceptionally enhancing the dispersion of Ru nanoparticles. Furthermore, the N-modified Ru/N 12 -AC catalyst exhibited a significantly higher turnover frequency value (1260.06 h −1 ) than Ru/AC catalyst (913.64 h −1 ). It was deduced that the presence of the pyridine groups could improve the adsorption of intermediate DH 4 by promoting the coverage of DH 4 on the catalyst surface. The environment of surface-enriched DH 4 accelerated the reaction rate of DH 4 hydrogenation and increased the selectivity to DEHCH. Therefore, the cooperation between highly dispersed Ru nanoparticles and pyridine groups supports remarkably enhanced the activity and selectivity. In addition, the Ru/N 12 -AC catalyst presented excellent catalytic activity and versatility in the hydrogenation of other phthalates such as dimethyl phthalate, diethyl phthalate, and dibutyl phthalate, demonstrating its prospective application in phthalate esters hydrogenation. Graphical abstract
Description N-doping exceptionally improved Ru dispersion and the adsorption of the intermediate product in DOP hydrogenation, leading to a higher activity and selectivity to saturated product.
研究领域:
催化
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化学工程
·
材料科学
·
有机化学
✓ 已验证
产品关联
DOI
高影响因子
PLoS One
·
2024
·Vol. 19
·期 5
·e0301358
·
IF 2.9
Chuang Wei,Yijun Gao,Peifeng Li
Drug-resistant bacteria arising from antibiotic abuse infections have always been a serious threat to human health. Killing bacteria with toxic reactive oxygen species (ROS) is an ideal antibacterial method for treating drug-resistant bacterial infections. Here, we prepared Pt-Ru bimetallic nanoclusters (Pt-Ru NCs) with higher peroxidase (POD)-like activity than Pt monometallic nanoclusters. Pt-Ru can easily catalyze the decomposition of H 2 O 2 to produce ·OH, thereby catalyzing the transformation of 3,3’,5,5’-tetramethylbiphenylamine (TMB) to blue oxidized TMB (oxTMB). We utilized the POD-like activity of the Pt-Ru NCs for antibacterial therapy. The results showed that at doses of 40 μg/mL and 16 μg/mL, the Pt-Ru NCs exhibited extraordinary antibacterial activity against E . coli and S . aureus , demonstrating the enormous potential of Pt-Ru NCs as antibacterial agents.
研究领域:
纳米技术
·
生物材料
·
抗菌研究
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Small
·
2024
·
IF 13
Yingyan Ma,Yuan Ha,Liangqiang Chen,Ziqi An,Linzhuang Xing,Zhenni Wang,Zhimin Li
Efficient and affordable price bifunctional electrocatalysts based on transition metal oxides for oxygen and hydrogen evolution reactions have a balanced efficiency, but it remains a significant challenge to control their activity and durability. Herein, a trace Ru (0.74 wt.%) decorated ultrathin CoOOH nanosheets (≈4 nm) supported on the surface of nickel foam (Ru/CoOOH@NF) is rationally designed via an electrochemically induced strategy to effectively drive the electrolysis of alkaline overall water splitting. The as-synthesized Ru/CoOOH@NF electrocatalysts integrate the advantages of a large number of different HER (Ru nanoclusters) and OER (CoOOH nanosheets) active sites as well as strong in-suit structure stability, thereby exhibiting exceptional catalytic activity. In particular, the ultra-low overpotential of the HER (36 mV) and the OER (264 mV) are implemented to achieve 10 mA cm −2 . Experimental and theoretical calculations also reveal that Ru/CoOOH@NF possesses high intrinsic conductivity, which facilitates electron release from H 2 O and H-OH bond breakage and accelerates electron/mass transfer by regulating the charge distribution. This work provides a new avenue for the rational design of low-cost and high-activity bifunctional electrocatalysts for large-scale water-splitting technology and expects to help contribute to the creation of various hybrid electrocatalysts.
研究领域:
电化学
·
材料科学
·
催化
·
能源转换与存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Frontiers of Chemical Science and Engineering
·
2022
·Vol. 16
·期 10
·1505-1513
·
IF 4.803
Abuduwayiti Reyila,Ma Feng-Yun,Fan Xing
Four supported catalysts, nickel and ruthenium on a HZSM-5 support, were prepared by equal volume impregnation and in-situ decomposition of carbonyl nickel. The properties of catalysts were investigated by catalytic hydro-conversion of 2,2′-dinaphthyl ether as the model compound and extraction residue of Naomaohu lignite as the sample under an initial H 2 pressure of 5 MPa and temperature at 150 °C. According to the catalytic hydro-conversion results of the model compound, Ni—Ru/HZSM-5 exhibited the best catalytic performance. It not only activated H 2 into H⋯H, but also further heterolytically split H⋯H into immobile H − attached on the acidic centers of Ni—Ru/HZSM-5 and relatively mobile H + . Catalytic hydro-conversion of the extraction residue from Naomaohu lignite was further examined over the optimized catalyst, Ni—Ru/HZSM-5. Detailed molecular compositions of products from the extraction residue with and without hydrogenation were characterized by Fourier transform infrared spectroscopy and gas chromatography/mass spectrometry. The analytical results showed that the oxygen-containing functional groups in products of hydrogenated extraction residue were obviously reduced after the catalytic treatment. The relative content of oxygenates in the product with catalytic treatment was 18.57% lower than that in the product without catalytic treatment.
研究领域:
化学工程
·
材料科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）