MOLECULES
·
2023
·Vol. 28
·期 5
·2189
·
IF 4.6
Yunqing Zhu,Bingqing Li,Yongming Wang,Tian Wang
Electrocatalytic oxidation (ECO) has attracted attention because of its high efficiency and environmental friendliness in water treatment. The preparation of anodes with high catalytic activity and long service lifetimes is a core part of electrocatalytic oxidation technology. Here, porous Ti/RuO2-IrO2@Pt, Ti/RuO2-TiO2@Pt, and Ti/Y2O3-RuO2-TiO2@Pt anodes were fabricated by means of modified micro-emulsion and vacuum impregnation methods with high porosity titanium plates as substrates. The scanning electron microscopy (SEM) images showed that RuO2-IrO2@Pt, RuO2-TiO2@Pt, and Y2O3-RuO2-TiO2@Pt nanoparticles were coated on the inner surface of the as-prepared anodes to form the active layer. Electrochemical analysis revealed that the high porosity substrate could result in a large electrochemically active area, and a long service life (60 h at 2 A cm−2current density, 1 mol L−1H2SO4as the electrolyte, and 40 °C). The degradation experiments conducted on tetracycline hydrochloride (TC) showed that the porous Ti/Y2O3-RuO2-TiO2@Pt had the highest degradation efficiency for tetracycline, reaching 100% removal in 10 min with the lowest energy consumption of 167 kWh kg−1TOC. The reaction was consistent with the pseudo-primary kinetics results with a k value of 0.5480 mol L−1s−1, which was 16 times higher than that of the commercial Ti/RuO2-IrO2electrode. The fluorospectrophotometry studies verified that the degradation and mineralization of tetracycline were mainly ascribed to the •OH generated in the electrocatalytic oxidation process. This study thus presents a series of alternative anodes for future industrial wastewater treatment.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
PubMed
高影响因子
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
·
2019
·Vol. 97
·期 12
·3002-3011
·
IF 1.61
Jie Ren,Yi-Ling Liu,Li Feng,Chun-Wei Liu
The electrochemical preparation of NaClO has been widely used for the production of industrial disinfectant. To reduce the cost of electrode preparation using the brushing method, this paper introduces a method for the electrodeposition for RuO 2 /Ti and RuO 2 -IrO 2 /Ti preparation and NaCl solution electrolysis. The deposition of Ir improves the uniformity and stability of the RuO 2 /Ti electrode. The optimum preparation conditions and additive concentrations were investigated in detail through the orthogonal experiment. By adjusting the electroplating time, temperature and voltage, the electrode with a high content of available chlorine was synthesized successfully. The physicochemical properties of the as-prepared RuO 2 /Ti and RuO 2 -IrO 2 /Ti were determined by XRD, SEM-EDS, and XPS, and the electrochemical performance and lifetime of the RuO 2 /Ti and RuO 2 -IrO 2 /Ti was verified via an electrochemical workstation. Uniform and stable RuO 2 /TiO 2 and RuO 2 -IrO 2 /TiO 2 were synthesized successfully for the electrolysis of the NaCl solution.
研究领域:
材料科学
·
电化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2019
·
IF 2.752
Chongyan Hao,Yuan Liao,Yang Wu,Yajing An,Jiannan Lin,Zhengfei Gu,Minhong Jiang,Shi Hu,Xiaotian Wang
In this work, we report RuO 2 -loaded TiO 2 –MXene hybrid nanostructure as a promising photocatalyst possessing remarkable activity for photocatalytic nitrogen fixation in water at room temperature. The MXene was synthesized by HF etching of the precursor Ti 3 AlC 2 and used as the substrate for the growth of RuO 2 nanoparticles and TiO 2 through a hydrothermal reaction . The benign activity is mainly attributed to the synergetic effect among MXene, TiO 2 , and RuO 2 in photocatalytic ammonia synthesis by combining light harvesting and nitrogen activation.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
Journal of Environmental Sciences
·
2024
·
IF 5.9
Jiahui Liu,Fangyuan Dong,Yaqi Huang,Yanghe Fu,Xinqing Lu,Rui Ma,Fumin Zhang,Shuhua Wang,Weidong Zhu
Reducing the cost of RuO 2 /TiO 2 catalysts is still one of the urgent challenges in catalytic HCl oxidation. In the present work, a Ce-doped TiO 2 supported RuO 2 catalyst with a low Ru loading was developed, showing a high activity in the catalytic oxidation of HCl to Cl 2 . The results on some extensive characterizations of both Ce-doped TiO 2 carriers and their supported RuO 2 catalysts show that the doping of Ce into TiO 2 can effectively change the lattice parameters of TiO 2 to improve the dispersion of the active RuO 2 species on the carrier, which facilitates the production of surface Ru species to expose more active sites for boosting the catalytic performance even under some harsh reaction conditions. This work provides some scientific basis and technical support for chlorine recycling.
研究领域:
化学工程
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催化科学
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产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Jiale Li,Weigang Gu,Dajun Wu,Xuekun Hong,Shi Tao,Bin Qian,Shaohui Xu,Paul K. Chu
The oxygen evolution reaction (OER) is a four-electron-proton reaction requiring a large overpotential. In order to improve the electrocatalytic activity of iron-based OER electrocatalysts, the overpotential must be reduced in order to improve the efficiency and cost-effectiveness. Herein, FeCo LDH, FeCo 2 O 4 , RuO 2 /FeCo 2 O 4 , and Ru/CoFe LDH are synthesized on carbon cloth (CC) by a simple hydrothermal and annealing technique. The materials are characterized systematically, and their electrocatalytic OER properties are evaluated in detail. RuO 2 /FeCo 2 O 4 delivers superior OER performance in 1 M KOH, such as a low onset potential 1.55 V at a current density of 10 mA/cm −2 , a Tafel slope of 85.2 mV/dec −1 , as well as robust stability. The Mott-Schottky analysis reveals that the built-in electric field accelerates charge transfer and enhances the catalytic activity of RuO 2 /FeCo 2 O 4 .
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2024
·
IF 4.3
Xiaozan Zhang,Fei Wu,Qiuju Zhang,Zhiyi Lu,Yueqing Zheng,Yin’an Zhu,Yichao Lin
Developing catalysts with high catalytic activity and stability in acidic media is crucial for advancing hydrogen production in proton exchange membrane water electrolyzers (PEMWEs). To this end, a self-supported WO3@RuO2 nanowire structure was grown in situ on a titanium mesh using hydrothermal and ion-exchange methods. Despite a Ru loading of only 0.098 wt %, it achieves an overpotential of 246 mV for the oxygen evolution reaction (OER) at a current density of 10 mA·cm–2 in acidic 0.5 M H2SO4 while maintaining excellent stability over 50 h, much better than that of the commercial RuO2. After the establishment of the WO3@RuO2 heterostructure, a reduced overpotential of the rate-determining step from M–O* to M–OOH* is confirmed by the DFT calculation. Meanwhile, its enhanced OER kinetics are also greatly improved by this self-supported system in the absence of the organic binder, leading to a reduced interface resistance between active sites and electrolytes. This work presents a promising approach to minimize the use of noble metals for large-scale PEMWE applications.
研究领域:
材料科学
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电催化
·
可再生能源
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NANOTECHNOLOGY
·
2019
·Vol. 31
·期 11
·115502
·
IF 3.399
Shendan Zhang,Chenhao Wang,Fengdong Qu,Siqi Liu,Cheng-Te Lin,Shiyu Du,Yousi Chen,Fanli Meng,Minghui Yang
Surface modification is a simple and effective means to promote the sensing performance of metal oxide semiconductor-based gas sensors. Marigold-shaped ZnO nanoflowers are fabricated via a simple precipitation reaction and subsequently catalytically modified with RuO2 on the surface through an ethylene glycol solvothermal treatment. The experimental results have proven that a very low content of Ru on the surface of ZnO exists in an oxidized state. However, the gas response of the sensor based on RuO2-modified ZnO is remarkably improved by 17 times to 100 ppm acetone with the decrease of optimal operating temperature from 219 °C–172 °C and reduction in recovery time from 79–52 s. The sensing enhancement mechanism of surface modification can be attributed to the formation of massive small heterostructure between p-type RuO2 ultrasmall nanoparticles and n-type ZnO as well as the catalytic effect of Ru4+ and a rougher surface.
研究领域:
材料科学
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传感器技术
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产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Jihan Wu,Ying Chang,Shaohong Guo,Aiju Xu,Jingchun Jia,Meilin Jia
Ruthenium-based nanomaterials are considered to be promising electrocatalysts for HER due to their higher activity. However, the active site exposure is low, and the catalytic mass activity is low. In order to achieve the particular aims, several types of engineering, such as crystal engineering, topography engineering, heterostructures and support engineering, have been used to catalysts. Here we report RuO 2 supported on CeO 2 -NC, owing to the abundant heterostructures and the presence of oxygen vacancies, the RuO 2 /CeO 2 -NC catalyst showed outstanding HER performance (98.2 mV, 53 mV and 298 mV@100 mA cm −2 in acidic, alkaline and neutral, respectively). Moreover, RuO 2 /CeO 2 -NC also has an excellent electrocatalytic durability for 40 h. The experimental achievements show that oxygen vacancies and heterostructures could jointly enhance performance of catalyst HER.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Chemistry
·
2019
·
IF 5.162
Jian-Qiu Huang,Jiaqiang Huang,Woon Gie Chong,Jiang Cui,Shanshan Yao,Baoling Huang,Jang-Kyo Kim
An optimized graphene/RuO 2 /S composite is prepared by hydrothermal growth of RuO 2 particles on graphene oxide sheets as the positive electrode for rechargeable lithium-sulfur batteries. The electrode with 6.1 wt% RuO 2 nanocrystals and a high sulfur content of 79.0 wt% delivers an optimal electrochemical performance with high residual capacities of 508 mAh g −1 after 200 cycles and 389 mAh g −1 after 800 cycles at 1 C with a low capacity decay of 0.054%. The RuO 2 nanocrystals promote the redox reaction kinetics and facilitate the transformation of sulfur chemistry, leading to large improvements in reversibility and rate capability of the composite electrode. The density functional theory calculations signify the formation of Li–O and Ru–S bonds through chemical interactions between RuO 2 and Li polysulfides while the adsorption energies between graphene and polysulfide species are much higher in the presence of RuO 2 than that of the neat graphene acting alone. These discoveries support the efficient entrapment of polysulfides by the composite electrode to the benefit of enhanced cyclic stability of the battery .
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Shiyu Bie,Meili Du,Wenxiang He,Huigang Zhang,Zhentao Yu,Jianguo Liu,Meng Liu,Wuwei Yan,Liang Zhou,Zhigang Zou
Efficient electrocatalysts for Li2CO3 decomposition play an important role in Li–CO2 batteries. In this paper, carbon nanotubes (CNTs) decorated with RuO2 is firstly introduced as cathode materials for Li–CO2 batteries. The CNT@RuO2 composite can not only deliver a high specific capacity but also a lower charge voltage. With the CNT@RuO2 cathodes, the Coulombic efficiency still remains around 100% until the 15th cycle. The charge voltage of early 30 cycles at a current of 50 mA·g–1 with a capacity limit of 500 mAh·g–1 can be fully lowered under 4.0 V. Particularly, the CNT@RuO2 cathode can realize most decomposition of prefilled Li2CO3 and show a platform at around 3.9 V. This catalytic activity toward both in situ formed and preloaded Li2CO3 is more feasible for practical application in complex environment.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-13
·
IF 15.7
Wang Haifeng,Lin Chao,Tan Lei,Shen Jing,Wu Xiaotong,Pan Xiangxiang,Zhao Yonghui,Zhang Haojie,Sun Yu,Mei Bingbao,Um Han-Don,Xiao Qi,Jiang Wan,Li Xiaopeng,Luo Wei
Advancements in proton-exchange membrane water electrolyzer depend on developing oxygen evolution reaction electrocatalysts that synergize high activity with stability. Here, we introduce an approach aimed at elevating oxygen evolution reaction performance by enhancing the spatiotemporal coordination of oxygen radicals to promote efficient O-O coupling. A dense, single-atom configuration of oxygen radical donors within interconnected RuO 2 nanocrystal framework is demonstrated. The stable oxygen radicals on gallium sites with adaptable Ga-O bonds are thermodynamically favorable to attract those from Ru sites, addressing dynamic adaptation challenges and boosting O-O coupling efficiency. The optimized catalyst achieves a low overpotential of 188 mV at 10 mA cm -2 , operates robustly for 800 h at 100 mA cm -2 in acidic conditions, and shows a large current density of 3 A cm -2 at 1.788 V, with stable performance at 0.5 A cm -2 for 200 h, confirming its long-term viability in proton-exchange membrane water electrolyzer applications.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2018
·Vol. 8
·期 41
·23397-23403
·
IF 2.936
Zhuo-Liang Jiang,Jing Xie,Cong-Shan Luo,Meng-Yang Gao,Huan-Liang Guo,Mo-Han Wei,Hong-Jun Zhou,Hui Sun
The mechanism of Li–O2 batteries is based on the reactions of lithium ions and oxygen, which hold a theoretical higher energy density of approximately 3500 W h kg−1. In order to improve the practical specific capacity and cycling performance of Li–O2 batteries, a catalytically active mechanically robust air cathode is required. In this work, we synthesized a freestanding catalytic cathode with RuO2 decorated 3D web Co3O4 nanowires on nickel foam. When the specific capacity was limited at 500 mA h g−1, the RuO2–Co3O4/NiF had a stable cycling life of up to 122 times. The outstanding performance can be primarily attributed to the robust freestanding Co3O4 nanowires with RuO2 loading. The unique 3D web nanowire structure provides a large surface for Li2O2 growth and RuO2 nanoparticle loading, and the RuO2 nanoparticles help to promote the round trip deposition and decomposition of Li2O2, therefore enhancing the cycling behavior. This result indicates the superiority of RuO2–Co3O4/NiF as a freestanding highly efficient catalytic cathode for Li–O2 batteries.
研究领域:
材料科学
·
电化学
✓ 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）