BIOSENSORS & BIOELECTRONICS
·
2017
·
IF 7.78
Xiaojian Li,Yaoguang Wang,Li Shi,Hongmin Ma,Yong Zhang,Bin Du,Dan Wu,Qin Wei
An electrochemiluminescence (ECL) biosensor was developed for detection of Concanavalin A (Con A). Chitosan/Ru(bpy) 3 2+ /silica/Fe 3 O 4 nanomaterials (CRuSi-Fe 3 O 4 ) were synthesized through W/O microemulsion route. The added Fe 3 O 4 nanoparticles can simplify the prepared process and enhance the conductivity of nanomaterials which can increase the ECL intensity of luminophor CRuSi-Fe 3 O 4 . In addition, the layered structure of CRuSi-Fe 3 O 4 can immobilize lots of Con A using glutaraldehyde as the coupling agent which can improve the sensitivity of the biosensor. Then the quenching probe glucose functionalized NiCo 2 S 4 nanoparticles-grown on carboxylic graphene (NiCo 2 S 4 -COOH-rGO@Glu) was anchored on the modified-electrode via the specific carbohydrate-Con A interaction. Here, NiCo 2 S 4 was used to quench the ECL of CRuSi-Fe 3 O 4 , graphene was used to grow NiCo 2 S 4 nanoparticles as carrier materials and glucose was served as the recognition element for bounding Con A. Therefore, a desirable quenching ECL signal was measured with S 2 O 8 2- as the coreactant of CRuSi-Fe 3 O 4 . Under the optimization of determination conditions, a linear response range for Con A from 0.5 pg mL −1 to 100 ng mL −1 was obtained, and the detection limit was calculated to be 0.18 pg mL −1 (S/N=3).
研究领域:
生物传感
·
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yuanyuan Cong,Mengling Liu,Luyun Chen,Yurong Qi,Limin Zhang,Qiuping Zhao,Chunlei Li,Haibin Wang
The sluggish hydrogen energy conversion kinetics in alkaline medium and the complete passivation under high anodic potential as well as the easy detachment of active sites from the carbon substrate are three critical challenges of Ru-based electrocatalysts for their practical application. Herein, Ru (single atoms and nanoclusters)-embedded TiO 2-x (Ru SA -Ru NC /TiO 2-x ) well solves above-mentioned urgent problems simultaneously. Specifically, the optimal Ru SA -Ru NC /TiO 2-x electrocatalyst delivers a mass activity of 1620 A g Ru –1 and a low overpotential of 24 mV at 10 mA cm −2 in alkaline hydrogen oxidation and evolution reactions (HOR/HER), respectively. More importantly, the Ru/TiO 2-x can unprecedentedly catalyze the HOR up to a potential of 1.2 V vs. RHE without deactivation and almost maintain unchanged after accelerated stability tests of 10,000 CVs or the presence of 100 ppm CO impurity. Confirmed by in/ex-situ experimental measurements and computational analyses, the enhancement in performance is attributed mainly to the construction of high-density Ru-Ti bonds, maintaining the unblocked charge transfer from TiO 2 to Ru and achieving more low-valence Ru species. The observed Ti 3+ species on oxygen vacancies derived from the original structure and in-situ formation during the electrochemical reaction would be preferentially oxidized, further protecting Ru sites and aiding in the electrocatalytic process. Benefiting from Ru-Ti bonds and triggered oxygen vacancies, Ru could serve as exclusive optimal H adsorption sites and cooperate with the OH ad on Ti sites, rapidly and stably accelerating hydrogen energy conversion.
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 ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Chenhao Wang,Shendan Zhang,Lei Qiu,Sefiu Abolaji Rasaki,Fengdong Qu,Tiju Thomas,Yanping Liu,Minghui Yang
In this work, WO 3 nanosheets are synthesized successfully through the hydrothermal method . Ru is thereafter efficiently loaded on the surface of WO 3 using the ethylene glycol-assisted solvothermal method. The gas sensing test shows that 0.5 wt% Ru-WO 3 exhibits the best performance towards xylene detection. Compared with the pure WO 3 sensor, the gas response of the sensor based on 0.5 wt% Ru-WO 3 in 100 ppm xylene increases from 11 to 73, and the operating temperature decreases from 375 °C to 280 °C. And an ultra-low detection limit of 25 ppb is obtained. In addition, the gas sensing performance of the Ru-loaded WO 3 sensor is much better than that of Au, Pt and Pd-loaded WO 3 sensors. The enhanced gas sensing performance can be attributed to the catalytic overflow of Ru and the formation of heterojunction between RuO 2 and WO 3. It is expected that this finding gives rise to further efforts on efficient and low-cost xylene sensors that are based on Ru-loaded WO 3 .
研究领域:
材料科学
·
传感器技术
✓ 已验证
DOI
高影响因子
CATALYSIS LETTERS
·
2024
·
IF 2.3
Li Ruili,Liu Lin,Ju Xiaohua,Feng Ji,Wang Jiemin,Guo Jiangping,He Teng,Chen Ping
The essential role of metal–support interaction in ammonia synthesis was investigated by using a Pr 6 O 11 supported Ru nanoparticles (NPs) catalyst system. Loading of Ru NPs onto the Pr 6 O 11 support with relatively low surface area yields similar metal dispersion with respect to conventional SiO 2 support. The Ru NPs on the Pr 6 O 11 was found to exhibit excellent catalytic performance in ammonia synthesis, superior to free-standing Ru NPs and Ru NPs on conventional SiO 2 support. Detailed structure analysis results reveal that the superior activity of Ru/Pr 6 O 11 can be attributed to the enhanced interaction between the Ru NPs and Pr 6 O 11 , which can modulate the electronic structure of Ru NPs and trigger catalytic ammonia synthesis over Ru NPs on Pr 6 O 11 . Furthermore, nitrogen isotope exchange experiment reveals that superior nitrogen dissociation ability is essential for the excellent activity and intrinsic activity of Ru/Pr 6 O 11 in ammonia synthesis. These findings demonstrate that Pr 6 O 11 can be used as a new kind of support for preparation of efficient Ru-based catalysts for ammonia synthesis, and also open up opportunities for design of Pr 6 O 11 supported metal catalysts for other catalytic reactions. Graphitical Abstract Interaction between the Ru NPs and Pr 6 O 11 can modulate the electronic structure of Ru NPs and trigger catalytic ammonia synthesis over Ru NPs on Pr 6 O 11 .
研究领域:
催化化学
·
材料科学
·
物理化学
✓ 已验证
DOI
高影响因子
LANGMUIR
·
2026
·
IF 3.9
Lanxin Ye,Jiayi Chen,Yuan Zhou,Miao Yang,Shuai Gao,Miao Chen,Hongxia Liu,Lili Zhao,Qixun Shi,Chuan Wang
Reducing the noble metal loading while maintaining its high catalytic performance is a challenge. Herein, we engineer Ru/C–P═O synergistic sites to develop an ultralow-content Ru catalyst. The Ru content is as low as 0.05%. The 0.05% Ru/P7AC catalyst exhibits an excellent acetylene conversion of 94% in the acetylene hydrochlorination under conditions of 180 °C and a GHSV(C2H2) of 60 h–1. Such a low Ru content and high catalytic performance can be attributed to the Ru/C–P═O species on P-doped carbon. The synergistic interaction between Ru and C–P═O species promotes the dispersion of Ru species, increases the content of high valence Ru, and enhances the adsorption of acetylene, thereby improving the catalyst activity. Simultaneously, the synergistic interaction between Ru and C–P═O species also slows the reduction of high valence Ru and inhibits coke deposition, thereby enhancing the catalyst stability. DFT calculations further validate the synergistic interaction of Ru and C–P═O species, and a novel reaction pathway involving the C–P═O species is proposed. This work develops ultralow-content Ru catalysts with high catalytic activity, offering a viable strategy for designing mercury-free catalysts.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Science Bulletin
·
2026
·
IF 20.7
Yueying Yan,Yang Yang,Bohan Yao,Yuting Chen,Huanhuan Xing,Yanchao Xu,Dongxu Jiao,Zhicai Xing,Dewen Wang,Xiurong Yang
Ruthenium (Ru)-based pyrochlores have shown significant potential for oxygen evolution reaction (OER) in acidic media. However, their further application is severely limited by insufficient structural stability and moderate activity under harsh acidic conditions. Herein, density functional theory (DFT) calculations were performed to investigate the effects of 3d transition metals doping on the intrinsic activity and stability of Y 2 Ru 2 O 7− δ . Guided by theoretical predictions, a series of Y 2 Ru 2− x M x O 7− δ (M = Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, and Zn) materials was synthesized, and Y 2 Ru 1.8 Zn 0.2 O 7− δ (YRZO) was identified as the optimal candidate. Both theoretical and experimental results demonstrate that Zn doping and cation vacancies synergistically optimize the adsorption energies of OER intermediates and stabilize high-valence Ru sites in YRZO, thereby accelerating reaction kinetics and reducing OER overpotentials. Meanwhile, Zn incorporation enhances the covalency of Ru–O bonds, which not only suppresses Ru dissolution but also delays the formation of surface reconstruction layers, thus significantly improving the long-term durability of the electrocatalyst. In situ characterizations verify that the OER process on YRZO proceeds via the adsorption evolution mechanism (AEM). The optimized YRZO exhibits a low overpotential of 272 mV at 10 mA cm −2 and can reach 1000 mA cm −2 at 1.597 V in a proton exchange membrane water electrolysis (PEMWE) device with exceptional stability over 1000 h. This work provides a rational strategy for designing highly active and stable acidic OER electrocatalysts by 3d transition metal doping of Y 2 Ru 2 O 7− δ -based pyrochlores.
✓ 已验证
DOI
PubMed
高影响因子
Journal of Environmental Sciences
·
2024
·
IF 5.9
Haodong Zhang,Min Chen,Weiming Qian,Jianghao Zhang,Xueyan Chen,Jinhou Fang,Chi Wang,Changbin Zhang
Photothermal catalysis is a promising technology to convert CO 2 into high value-added products. Here, we show that loading Ru NPs on TiO 2 achieved a remarkable photothermal synergistic effect and the Ru-TiO 2 demonstrated a high efficiency for the photothermal conversion of low CO 2 concentration to CH 4 at the gas-solid interface. The photothermal activity of the Ru-TiO 2 (217.9 µmol/(g·h)) was nearly 6 times higher than pure thermal activity (38.08 µmol/(g·h)), and nearly 20 times than the photocatalytic activity (10.9 µmol/(g·h)). We revealed that the light excitation could drive the generated electrons from TiO 2 to Ru particles, beneficial to CO 2 reduction, while external heating showed no influence on the charge separation of the Ru-TiO 2 . Hence, the photothermal synergy is not a heat-assisted photocatalytic process, but a photo-assisted thermal catalytic process. We finally demonstrated that the CO 2 was firstly converted to CO, and the CO was further hydrogenated to CH 4 . The introduction of light could promote the activation of intermediate CO species at the Ru-Ti interface sites, thus greatly accelerating CO hydrogenation to CH 4 . This work contributes to further understanding of the mechanism of photothermal catalytic CO 2 reduction.
研究领域:
催化化学
·
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2025
·
IF 4.3
Chongqi Chen,Youhua Lai,Chen Liao,Yu Ma,Yuping Qiu,Huihuang Fang,Yu Luo,Lilong Jiang
Ammonia decomposition has been recognized as an attractive pathway for hydrogen production; however, its highly-efficient activity at low temperatures remains great challenging which is strongly related to nanoparticle sizes, metal-support interaction and electronic properties. Herein, a high-entropy oxide {(Ce 0.2 La 0.2 Pr 0.2 Sm 0.2 Y 0.2 )O 2-y , HEO for short} with fluorite type structure was employed to support Ru species due to its unique effects induced by multicomponent configurations. The obtained Ru/HEO (1 wt%) achieved a high hydrogen formation rate of over 2747 mmol g Ru –1 min −1 under 500°C with 30,000 mL g cat –1 h −1 and stable activity with no obvious deactivation for over 100 h, outperforming most Ru-based catalysts. Detailed characterizations revealed that the constructed HEO interface promotes metal–support interactions and enhance feasible transfer of electrons, thus facilitating the activation of ammonia and desorption of nitrogen species. This work provides great potential of high-entropy materials in the design of advanced catalysts for energy conversion applications.
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2024
·Vol. 48
·期 47
·20061-20070
·
IF 2.7
Jiabing Chen,Yibo Tang,Xiaojun Lu,Zijing Lu,Xingmao Jiang
The industrial production of methyl propionate synthesized via methoxycarbonyl esterification of ethylene achieved 100% atom economy. In this study, we synthesized ruthenium-loaded praseodymium–cerium oxide (Pr–CeO2) catalysts by precipitation impregnation and evaluated their performance in the methoxycarbonylation reaction of ethylene. The effect of Pr doping on the reaction results was analyzed by characterization and mechanistic studies. Pr doping increased the concentration of localized oxygen vacancies in the catalysts and thus modulated the catalytic effect of Lewis acid–base pairs. The increase of local oxygen vacancies significantly enhanced the activation and dissociation of CH3OH. At the same time, since the dissociation activation of the other two feedstock molecules, ethylene and CO, occurred at the Ru site, Pr doping facilitated the dispersion of Ru to a certain extent, thus increasing the dissociation activation of CO and ethylene, which, in combination with Pr doping, further increased the content of oxygen vacancies in the active site as methanol, resulting in a substantial enhancement of the dissociation activation of the feedstock molecules, which then increased the catalytic reaction rate through synergistic effects. The results provide a new perspective for the future study of methoxycarbonylation.
研究领域:
催化化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Yuhan Zhang,Linbo Jiang,Lintao Jiang,Ruidong Li,Lei Gong,Zongkui Kou,Shichun Mu
Hitherto, much of the effort in catalysts has focused on enhancement of intrinsic activity. However, the increase in the number of active sites is equally crucial, especially for noble metal-based catalysts, as it is directly related to the atomic utilization efficiency and economy. Herein, by pyrolyzing ZIF-8 in a H 2 /Ar atmosphere and taking advantage of its reducing property to promote the reduction and volatilization of Zn, the nitrogen-doped carbon (NC-H 2 /Ar) with rich microporous and mesoporous structures is prepared. By means of the anchoring effect of micropores, Ru nanoclusters are formed and homogeneously dispersed on NC-H 2 /Ar (RuNC-H 2 /Ar). Thanks to the efficient mass transport channel provided by a large number of mesopores and the high Ru dispersion, the quantity of effective active sites of RuNC-H 2 /Ar is 2.92 times that of RuNC-Ar which is based on the support obtained by pyrolysis under Ar atmosphere. Therefore, compared with a larger overpotential of 22 mV for RuNC-Ar to achieve 10 mA cm −2 for hydrogen evolution reaction (HER), RuNC-H 2 /Ar only needs 14 mV to achieve the same current density, and its mass activity reaches 43.43 A g −1 @ 50 mV, which is 1.47 and 28.02 times that of RuNC-Ar and commercial Pt/C. In addition, in alkaline seawater, the RuNC-H 2 /Ar still maintains a high activity as 16 mV @ 10 mA cm −2 . Furthermore, this strategy for regulating the pore structure of the support based on H 2 atmosphere can also be extended to other zinc-based zeolitic imidazolate frameworks (Zn-ZIFs). This study provides a regulatory strategy that is both operational and universal for optimizing the pore structure of catalysts and increasing the quantity of effective active sites.
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2014
·Vol. 4
·期 51
·26847-26854
·
IF 3.708
Yue Teng,Le Xin Song,Anne Ponchel,Eric Monflier,Zhi Cheng Shao,Juan Xia,Zheng Kun Yang
A new route to produce Ru-based nanocomposites with mixed valence states of ruthenium is reported in this paper via a solid-phase sintering process. Precursor particles were prepared by an intimate mixing of RuCl3 and native β-cyclodextrin (β-CD) with a molar ratio of 1 : 1, followed by a sintering process at various temperatures ranging from 573 to 1173 K in ambient atmosphere. The so-obtained composite nanomaterials have been characterized by X-ray diffraction and notably the results show that an adjustment of the temperature enabled us to obtain Ru-based nanoparticles with controllable compositions. The surface-enhanced Raman scattering performances of the obtained nanomaterials have been analyzed using Rhodamine 6G (R6G) as the Raman probe. Their magnetic behaviors have been investigated as a function of the field strengths. The present work provides a significant advance in the development of both transformation in valence states of transition metals and in situ nanocomposites of metal/metal oxide combinations.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2023
·
IF 22.1
Fangxu Dai,Mingming Zhang,Qian Chen,Mingzhong Mi,Zhenjiang Li,Jishu Han,Jun Xing,Shouhua Feng,Lei Wang
Developing highly efficient and low-cost photocatalysts for CO 2 reduction is of critical importance for the conversion of CO 2 to value-added chemicals. Here we report a Co-based zeolitic imidazole framework (ZIF-67) based photocatalyst with exceptional photocatalytic activity and durability for CO 2 reduction. ZIF-67 is doped with dicyandiamide (DCD), the intermediate link with the trace Ru cocatalyst (0.0127 wt. %). The underlying reduction mechanism was unraveled by the joint experiment-theory study. The strong orbital coupling of ZIF-67-DCD-Ru series structure leads to strong CO 2 adsorption, electron enrichment on cocatalyst, and minimum Gibbs free energy barrier of CO generation. The synthesized ZIF-67/DCD/Ru sample exhibits excellent CO 2 photoreduction performance with a CO generation rate of 1495 mmol g Ru −1 h −1 and achieves a record turnover frequency (TOF) of 151 h −1 , representing top-level photocatalytic activity among all reported ZIFs-based photocatalysts. For the first time, our work points out a novel way to achieve high activity of ultralow noble metal loading photocatalyst and provides an in-depth understanding of the advances of the series structure.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）