ANALYTICAL CHEMISTRY
·
2021
·
IF 6.986
Xiaoli Xie,Dong Ping Wang,Chunxian Guo,Yuhang Liu,Qianghai Rao,Fangming Lou,Qiannan Li,Yongqiang Dong,Qunfang Li,Hong Bin Yang,Fang Xin Hu
Single-atom catalysts have attracted numerous attention due to the high utilization of metallic atoms, abundant active sites, and highly catalytic activities. Herein, a single-atom ruthenium biomimetic enzyme (Ru-Ala-C3N4) is prepared by dispersing Ru atoms on a carbon nitride support for the simultaneous electrochemical detection of dopamine (DA) and uric acid (UA), which are coexisting important biological molecules involving in many physiological and pathological aspects. The morphology and elemental states of the single-atom Ru catalyst are studied by transmission electron microscopy, energy dispersive X-ray elemental mapping, high-angle annular dark field–scanning transmission electron microscopy, and high-resolution X-ray photoelectron spectroscopy. Results show that Ru atoms atomically disperse throughout the C3N4 support by Ru–N chemical bonds. The electrochemical characterizations indicate that the Ru-Ala-C3N4 biosensor can simultaneously detect the oxidation of DA and UA with a separation of peak potential of 180 mV with high sensitivity and excellent selectivity. The calibration curves for DA and UA range from 0.06 to 490 and 0.5 to 2135 μM with detection limits of 20 and 170 nM, respectively. Moreover, the biosensor was applied to detect DA and UA in real biological serum samples using the standard addition method with satisfactory results.
研究领域:
生物医学工程
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材料科学
·
分析化学
✓ 已验证
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2015
·
IF 3.313
Xiaojing Li,Chunmei Zeng,Guangyin Fan
RuCo nanoparticles were in-situ synthesized and immobilized on the surface of graphene-like titanium carbide (Ti 3 C 2 X 2 ). RuCo nanoparticles were found to be well dispersed on Ti 3 C 2 X 2 surface. The catalytic property of RuCo/Ti 3 C 2 X 2 for hydrogen generation from the hydrolysis of ammonia borane at room temperature was investigated. Ru 1 Co 9 /Ti 3 C 2 X 2 showed the highest turnover frequency of 896 mol H 2 ·(mol Ru·min) −1 because of the synergetic effect between Ru and Co nanoparticles. The catalyst can also be easily separated from the reaction system by using a magnet and can be recycled at least four times, thereby showing potential practical applications.
研究领域:
材料科学
·
催化化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ORGANIC CHEMISTRY
·
2020
·
IF 4.335
Wubing Yao,Jiali Wang,Lili He,Dongdong Cao,Jianguo Yang
A ruthenium catalytic ortho-C–H diborylation of 2-arylpyridine derivatives, including challenging 2-phenoxypyridine functions, using a remarkably low catalyst loading and a low-cost and bench-stable boron source, has been developed. The novel strategy shows high activity with excellent selectivity and may offer a versatile and green alternative to currently employed high loadings of noble metals or extra additives for the selective borylations.
研究领域:
有机化学
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催化化学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2022
·Vol. 10
·期 27
·14435-14440
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IF 14.511
Zhongyao Duan,Mei Zhang,Lin Cui,Hongjie Yu,Kai Deng,You Xu,Ziqiang Wang,Liang Wang,Hongjing Wang
The design of electrocatalysts with favorable morphologies and surface compositions is an effective strategy to prepare electrocatalysts for the hydrogen evolution reaction (HER). Herein, a polyaniline (PANI) modified mesoporous ruthenium film supported on carbon paper (mRu@PANI/CP) was successfully synthesized by a two-step electrodeposition method at room temperature. With the mesoporous film structure and PANI modification, mRu@PANI/CP displayed superior HER catalytic activity with overpotentials of 30 mV (0.5 M H2SO4), 27 mV (1.0 M KOH), and 24 mV (1.0 M PBS), respectively, at a current density of 10 mA cm−2. This work not only provides a powerful route to prepare a mesoporous Ru film, but also offers a useful interface functionalization strategy to further enhance its electrocatalytic performance, beyond the HER.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2019
·Vol. 43
·期 33
·12907-12915
·
IF 3.069
Fuyou Du,Qiulian Zeng,Zhan Lai,Zhenfang Cheng,Guihua Ruan
Herein, a novel fluorescent probe was developed for the selective and sensitive detection of triclosan (TCS), which is based on turn-on fluorescence of quenched nitrogen silicon doped graphene quantum dot and ruthenium(III) ion (Si-GQDs/Ru3+) systems. Ru3+ is combined with Si-GQDs which thereby quenches the fluorescence, while the Si-GQDs/Ru3+ complex can be dissociated after the addition of TCS, resulting in fluorescence turn-on. The recovered fluorescence intensity was proportional to the concentration of TCS. The linear range of the probe for TCS detection was 500–25 000 ng L−1, with a low detection limit of 173 ng L−1. This detection platform has been successfully applied for the detection of TCS in both toothpaste and water samples.
研究领域:
分析化学
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环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Shushuang Sun,Rongsheng Chen,Ying Wen,Yang Li,Weiting Zhan,Feng Ma,Xingxin Jiang,Wenping He,Hongwei Ni
It is imperative to develop efficient and environmentally friendly technologies to remove ammonia nitrogen from the wastewater. Herein, RuO 2 nanoparticles decorated TiO 2 nanowires (RuO 2 /TiO 2 NWs) were fabricated for efficient electrocatalytic degradation of ammonia nitrogen. TiO 2 NWs were prepared on Ti mesh by hydrothermal treatment in NaOH solution, with diameter of 80–100 nm and length of ∼3 µm. Then RuO 2 nanoparticles were decorated on TiO 2 NWs by electrodeposition and annealing in air at 450 ℃. The effects of current, pH, initial ammonia concentration and chloride ion concentration on ammonia nitrogen degradation were investigated, and the possible degradation mechanism was discussed. After three hours of degradation in ammonia nitrogen waste liquid with NH 4 + -N concentration of 200 mg•L −1 and Cl - concentration of 2000 mg•L −1 , the ammonia nitrogen removal rate of RuO 2 /TiO 2 NWs reaches 99.876%. The mass loading of Ru is only 16.2 μg•cm −2 , suggesting an extremely high ammonia nitrogen degradation efficiency. Electrochemical test shows that the conductivity of RuO 2 /TiO 2 NWs is significantly enhanced as compared with that of TiO 2 NWs. RuO 2 /TiO 2 NWs also show good stability after 100 h of constant current test at 20 mA•cm −2 in ammonia nitrogen degradation. The prepared material can be used as an effective catalyst for the degradation of ammonia nitrogen in wastewater.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Qiang Fu,Lei Lin,Tao Wu,Qinghua Zhang,Xianjie Wang,Lingling Xu,Jun Zhong,Lin Gu,Zhihua Zhang,Ping Xu,Bo Song
Precious metals (Pt, Ir, Ru, and so on) and related compounds usually demonstrate superb catalytic activity for electrochemical hydrogen production. However, scarcity and stability are still challenges for hydrogen evolution reaction, even for single-atomic-site electrocatalysts. Herein, a fluorine (F) doping strategy is proposed to enhance the strong metal–support interaction between the F-doped Ni3N support and the loaded ruthenium (Ru) species. Via synergistically modulating both the Ru loading amount and F doping concentration, outstanding HER activity was achieved in Ru@F–Ni3N with an overpotential (η) of 115 mV at 100 mA cm–2, superior to the benchmark Pt/C (η = 201 mV). Density functional theory simulation in combination with X-ray photoelectron spectra and X-ray absorption spectroscopy characterizations convincingly demonstrate that, with the strongest electronegativity, F doping could effectively stabilize Ru atoms doped in the F–Ni3N substrate and simultaneously reduce the H bonding strength, which accelerated the desorption of H2. These findings provide a facile strategy to modulate both catalytic activities and stabilities of heteroatom-loaded catalytic materials.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Journal of the American Chemical Society
·
2020
·
IF 14.612
Jie Li,Guangming Zhan,Jianhua Yang,Fengjiao Quan,Chengliang Mao,Yang Liu,Bo Wang,Fengcai Lei,Lejing Li,Alice W. M. Chan,Liangpang Xu,Yanbiao Shi,Yi Du,Weichang Hao,Po Keung Wong,Jianfang Wang,Shi-Xue Dou,Lizhi Zhang,Jimmy C. Yu
The limitations of the Haber–Bosch reaction, particularly high-temperature operation, have ignited new interests in low-temperature ammonia-synthesis scenarios. Ambient N2 electroreduction is a compelling alternative but is impeded by a low ammonia production rate (mostly <10 mmol gcat–1 h–1), a small partial current density (<1 mA cm–2), and a high-selectivity hydrogen-evolving side reaction. Herein, we report that room-temperature nitrate electroreduction catalyzed by strained ruthenium nanoclusters generates ammonia at a higher rate (5.56 mol gcat–1 h–1) than the Haber–Bosch process. The primary contributor to such performance is hydrogen radicals, which are generated by suppressing hydrogen–hydrogen dimerization during water splitting enabled by the tensile lattice strains. The radicals expedite nitrate-to-ammonia conversion by hydrogenating intermediates of the rate-limiting steps at lower kinetic barriers. The strained nanostructures can maintain nearly 100% ammonia-evolving selectivity at >120 mA cm–2 current densities for 100 h due to the robust subsurface Ru–O coordination. These findings highlight the potential of nitrate electroreduction in real-world, low-temperature ammonia synthesis.
研究领域:
化学工程
·
电催化
·
材料科学
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Yongting Li,Jiayi Meng,Yue Zhu,Yongpeng Yang,Xiaoli Zhang,Xiucheng Zheng
Ammonia borane (AB) hydrolysis is a promising strategy for the development of hydrogen energy, and ultrafine metal nanoparticles (NPs) are attractive catalysts owing to their abundant active sites. In this work, porous graphitic carbon nitride (CN) are doped with reduced graphene oxide (rGO) and used as supports to evenly confine ultrafine Ru NPs with an adsorption-chemical reduction method. The results show that the different assembly methods and compositions affect the geometric and electronic characteristics of the composites, thus affecting the catalytic behavior in AB hydrolysis. Also, the effects of different Ru loadings and NaOH dosages are researched to improve the hydrolysis efficiency. Specifically, the optimal Ru/CN-rGO catalysts display exciting catalytic performance due to the proper porous structure, N, O co-doping and highly dispersed ultrafine Ru NPs . The corresponding turnover frequency (887.2 min −1 ) in the presence of NaOH (1.00 mol L −1 ) and the apparent activation energy (21.7 kJ mol −1 ) are superior to many previous results. The facile fabrication strategy and robust performance attest to a promising potential for Ru/CN-rGO in the fields of hydrogen energy.
研究领域:
材料科学
·
氢能研究
✓ 已验证
DOI
高影响因子
CATALYSIS COMMUNICATIONS
·
2013
·
IF 2.915
Mingming Niu,Yanhua Wang,Wenjiang Li,Jingyang Jiang,Zilin Jin
Ru nanoparticles were used as catalysts for semihydrogenation of alkynes for the first time. Poly(ethylene glycol) (PEG)-stabilized Ru nanoparticles were used as catalysts for semihydrogenation of various terminal alkynes in thermoregulated PEG biphasic system, which allows for not only an efficient homogeneous catalytic reaction, but also an easy biphasic separation and reuse of catalyst. Under the optimized conditions, various terminal alkynes were hydrogenated to the corresponding alkenes with high selectivity. After reaction, the Ru nanoparticle catalyst could be separated from products by simple phase separation and recycled for ten times without evident loss in activity and selectivity.
研究领域:
化学工程
·
催化化学
·
材料科学
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY
·
2022
·
IF 5.436
Qikang Wu,Han Li,Yan Zhou,Shanshan Lv,Taiyu Chen,Shaohuan Liu,Wanying Li,Zheng Chen
Ruthenium, which is relatively cheap in precious metals, has become a popular alternative for a hydrogen evolution reaction (HER) catalyst because of its corrosion resistance and appropriate metal–H bond strength. Convenient synthesis and active site regulation are conducive to stimulating the excellent catalytic performance of Ru as much as possible. Herein, using the mature mesoporous nitrogen-doped carbon material as the support, the catalytic materials containing both single atom Ru and Ru nanoparticles were synthesized by impregnation using the solid-phase reduction method. The effect of reduction temperature on the dispersion state and electronic structure of Ru species has been fully studied using electronic and spectroscopic characterizations. The sample reduced at 300 °C has excellent HER activity with overpotentials of 10.8 and 53.8 mV to deliver 10 mA/cm2 in alkaline and acidic media, respectively, which is among the best activities in the reported results. Electrochemical impedance analysis shows that the reduction temperature has a great influence on the number of active sites and charge transfer impedance of the catalyst.
研究领域:
材料科学
·
催化化学
✓ 已验证
DOI
高影响因子
DALTON TRANSACTIONS
·
2023
·Vol. 52
·期 35
·12368-12377
·
IF 4
Yinyin Chen,Tianhua Cui,Hua Chen,Xue li Zheng,Haiyan Fu,Ruixiang Li
A new series of cationic ruthenium(II) complexes, [RuCl(PPh3)2(κ3-NNN-L1)]Cl (1), [RuH(PPh3)2(κ3-NNN-L2)]Cl (2), and [RuH(PPh3)2(κ3-NNN-L3)]Cl (3), bearing a 2,6-bis (1-R-5-methyl-pyrazol-3-yl) pyridine ligand (L1: R = H, L2: R = C6H4-p-CF3, L3: R = C6H4-p-OCH3), were synthesized and characterized with NMR, HRMS, and single-crystal X-ray diffraction. Their catalytic application was investigated in the acceptorless dehydrogenation (AD) of primary alcohols. Complex 1 outperformed 2 and 3 in terms of the selectivity towards the aldehydes, and provided the aldehydes with a yield of up to 99%, with good functional group tolerance under mild conditions. In addition, the only by-product of the reaction was dihydrogen, which can be collected as clean energy, and the reaction meets the requirements of environment-friendly chemistry. Complex 1 also proved to be a promising catalyst in the sequential AD/condensation reaction between the primary and secondary alcohols, affording α,β-unsaturated ketones in moderate to good selectivity.
研究领域:
无机化学
·
绿色化学
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）