SOLAR ENERGY
·
2018
·
IF 4.374
Shuo Wang,Bao Liu,Yu Zhu,Zirui Ma,Beibei Liu,Xu Miao,Ruixin Ma,Chengyan Wang
Perovskite solar cells (PSCs) as the most promising alternative to the Si solar cells have been developed rapidly in recent time. Superior electron mobility and conductivity of the compact layer material are necessary for high efficiency in perovskite solar cells by reducing excessive charge accumulation and guaranteeing effective electron injection at the compact layer/perovskite interface. In this study, Ru ions were introduced into traditional compact TiO 2 to improve the electron transporting layer (ETL) properties and conductivity performance. Ru 4+ was discovered in the Ru:TiO 2 according to the result of XPS. The reduced trap-filled limit voltage (V TFL ) of the Ru:TiO 2 compact layers showed that trap density in the Ru:TiO 2 film was lower than that of the pristine TiO 2 film. The PSCs based on 1 mol% Ru:TiO 2 exhibited the suitable band gap, low resistivity and high carrier density, comparing with the undoped compact TiO 2 , the charge transportation at the compact layer/mesoporous layer interface was enhanced with the incorporation of Ru, resulting in the reduction in hysteresis of the device. The power conversion efficiency (PCE) of the Ru-doped compact TiO 2 film based PSCs was improved from 14.83% to 18.35%.
研究领域:
材料科学
·
能源技术
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DOI
高影响因子
Nanoscale
·
2023
·Vol. 15
·期 28
·12064-12070
·
IF 6.7
Hai Liu,Zhuang Zhang,Mengxuan Li,Yaping Li,Yun Kuang,Xiaoming Sun
Developing highly efficient hydrogen oxidation reaction (HOR) electrocatalysts in alkaline media is of great significance for anion exchange membrane fuel cells (AEMFCs). Herein, we report an efficient Ru-doped hexagonal tungsten trioxide (Ru-WO3) HOR electrocatalyst through a hydrothermal strategy. The prepared Ru-WO3 electrocatalyst exhibits enhanced HOR performance with a 6.1 times higher exchange current density and better durability than commercial Pt/C. Structural characterizations and theoretical calculations reveal that the uniformly distributed Ru was modulated by oxygen defects and the electron transfer from O to Ru modulated the H* adsorption of Ru sites. In addition, plenty of W sites can serve as hydroxyl adsorption sites to accelerate the HOR kinetics. This work not only provides an efficient HOR catalyst in alkaline media, but also promotes the fundamental understanding of the effect of modulation on the adsorption of H* and *OH in tungsten oxides with a relatively low oxidation state by Ru doping, broadening the range of HOR catalysts to Ru-doped metal oxides.
研究领域:
材料科学
·
电化学
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DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Wenchao Zhang,Min Xue,Xinyu Zhang,Conghui Si,Chunqing Tai,Qifang Lu,Mingzhi Wei,Xiujun Han,Jingyun Ma,Shunwei Chen,Enyan Guo
Recently, perovskite oxides have acquired a rapidly growing research interest in energy storage and conversion systems, especially the electrolysis of water. Rational doping is an extremely effective strategy to enhance the hydrogen evolution reaction/oxygen evolution reaction (HER/OER) of the perovskite oxides. Herein, a series of novel bi-functional electrocatalysts were synthesized by doping Ru in SrFeO 3-δ perovskite oxide (SrFe 1-x Ru x O 3-δ , x = 0, 0.15, 0.30, 0.45) which exhibit remarkable enhancements of HER/OER activities and long-term stabilities in the alkaline solution (1.0 M KOH). Among them, SrFe 0.7 Ru 0.3 O 3-δ (SFR30) shows the best electrocatalytic activities for overall water splitting, exhibiting low overpotentials for HER (∼41 mV) and OER (∼334 mV) at −10 and 10 mA cm −2 , respectively, generating current densities of 10 mA cm −2 in alkaline electrolytic cell using the potential of 1.58 V. In addition, the SFR30 electrocatalyst exhibits remarkable stability which can be operated continuously for 96 h without significant delay. Density functional theory (DFT) calculations indicate that Ru doping can effectively modulate the adsorption of intermediates on the active sites to achieve excellent electrocatalytic performance. Many new prospects have been opened for the development of bi-functional electrocatalysts for overall water splitting.
研究领域:
材料科学
·
能源化学
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Guoguo Wang,Qiuyue Chen,Jing Zhang,Xuguan An,Qian Liu,Lisi Xie,Weitang Yao,Xuping Sun,Qingquan Kong
The electrocatalytic reduction of nitrite to recyclable ammonia (NH 3 ) is essential to maintain nitrogen balance and meet growing energy requirements. Herein, we report that Ru doped honeycomb NiMoO 4 nanosheet with copious oxygen vacancies grown on nickel foam substrate has been prepared by a facile hydrothermal synthesis and immersion process, which can act as an efficient electrocatalyst for NH 3 synthesis by reduction of nitrite. By optimizing the concentration of RuCl 3 solution, 0.01Ru-NiMoO 4 /NF possesses excellent NO 2 − RR performance with NH 3 yield of 20249.17 ± 637.42 μg h −1 cm −2 at −0.7 V and FE of 95.56 ± 0.72 % at −0.6 V. When assembled into a Zn–NO 2 − battery, it provides a remarkable level of power density of 13.89 mW cm −2 , outperforming the performance of virtually all previous reports. The efficient adsorption and activation of NO 2 − over Ru-doped NiMoO 4 with oxygen vacancy have been verified by density functional theory calculations, as well as the possible reaction pathway.
研究领域:
材料科学
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环境科学
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能源科学
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DOI
PubMed
高影响因子
ChemSusChem
·
2020
·Vol. 14
·期 2
·730-737
·
IF 7.962
Wei Li,Bomin Feng,Lingya Yi,Junying Li,Weihua Hu
Graphical Time for HER/OER : Tremella-like Ru-doped Co-V layered double hydroxide nanosheet exhibits excellent bifunctional catalytic activity toward HER and OER in alkaline media. It affords 10 mA cm −2 electrolytic current density at an extremely low cell voltage of 1.50 V. Incorporation of Ru changes the morphology to offer high surface areas and significantly boosts the electrocatalytic activity. Active electrocatalysts for the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) are decisive for achieving efficient energy conversion from electricity to hydrogen fuel through water electrolysis. In this study, tremella-like Ru-doped Co-V layered double hydroxide nanosheets on Ni Foam (Ru-CoV-LDH@NF) was fabricated by a one-pot solvothermal reaction. As-prepared Ru-CoV-LDH@NF, with a nominal Ru loading of around 51.6 μg cm −2 exhibits excellent bifunctional catalytic activity towards HER and OER in alkaline media. To accomplish a current density of 10 mA cm −2 , it demands 32 mV and 230 mV overpotentials for HER and OER, respectively. The alkali electrolyzer utilizing Ru-CoV-LDH/NF as bifunctional electrocatalyst affords 10 mA cm −2 electrolytic current density at an extremely low cell voltage of 1.50 V, showing excellent performance compared to a Pt/C−RuO 2 -based electrolyzer and many other bifunctional electrocatalyst-based ones. The incorporation of Ru changes the morphology of the resultant nanosheets to offer high electrochemical surface areas for electrocatalysis; at the same time, it significantly boosts the intrinsic HER/OER electrocatalytic activity. For HER, the energy barrier of the Volmer step is efficiently reduced upon Ru doping, whereas the Ru dopants optimize the absorption strength of *O intermediates to facilitate the OER process. This work offers a feasible means to optimize the Co-based hydroxide materials for improved electrocatalysis in overall water splitting.
研究领域:
材料科学
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电化学
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DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Yuxiao Gao,Ying Zhao,Hongru Liu,Mingyu Shao,Zhi Chen,Tianyi Ma,Zexing Wu,Lei Wang
Developing efficient and cost-effective catalysts for hydrogen evolution reaction (HER) is vital to hydrogen energy's commercial applications. In this study, N,P-doped carbon supported ruthenium (Ru) doped triruthenium tetraphosphide (Re 3 P 4 ) (Ru-Re 3 P 4 /NPC) with porous nanostructure is prepared using the low-toxic melamine phosphate as the carbon and phosphorous source. The in-situ generated N,P-doped carbon layers play a pivotal role in regulating the electrocatalytic activity by avoiding the aggregation of the nanoparticles and increasing the specific surface area. Moreover, Ru doping contributes to the remarkable electrocatalytic performance of the prepared nanomaterials. Impressively, the as-synthesized Ru-Re 3 P 4 /NPC presents remarkable electrocatalytic performances toward HER with small overpotentials of 39 mV, 115 mV, and 88 mV to deliver 10 mA cm −2 in alkaline, neutral, and acidic media. Moreover, the prepared electrocatalyst can drive water-splitting with a small potential of 1.45 V@10 mA cm −2 and use sustainable energies, including solar, wind, and thermal, as electric resources. This work paves a novel and valuable way to enhance the electrocatalytic performances of metal phosphides.
研究领域:
材料科学
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可再生能源
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电催化
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DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2023
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IF 5.2
Chongchao Zhang,Hang Yin,Xiao Bai,Ziyin Yang
In this paper, we report a new strategy to activate the electrocatalytic activity of Cu to realize the non-enzymatic detection of hydrogen peroxide . The Ru-doped copper nanoparticles were prepared on the surface of carbon materials by direct pyrolysis of Ru in exchange for Cu-BTC metal-organic framework. The materials were characterized by transmission electron microscopy (TEM), energy dispersive spectroscopy (EDS) and x-ray diffraction (XRD). Surprisingly, Ru doping induced obvious lattice distortion of Cu nanoparticles , which made Cu nanoparticles exhibit excellent electrocatalytic activity for hydrogen peroxide reduction. The sensor based on Ru-doped Cu nanoparticles can detect hydrogen peroxide in a wide linear range from 0.01 mM to 5.55 mM. Moreover, as a hydrogen peroxide sensor, it has a high sensitivity of 327.14 µA·mM −1 ·cm −2 and a low detection limit of 8.9 µM. Therefore, Cu nanoparticles with the lattice distortion was demonstrated to be a potential material for hydrogen peroxide electrochemical sensor .
研究领域:
材料科学
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分析化学
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Yizhong Zou,Wen-Da Zhang,Ming Chen,Jiangyong Liu,Zhi-Guo Gu,Xiaodong Yan
The influence of the preorganized structure and chemical composition of metal-organic frameworks (MOFs) on the morphology, surface properties, and catalytic activity of the MOFs-derived metal oxides is yet to be revealed. In this work, two types of Co-MOFs with different coordination configurations are synthesized for the preparation of the structure-engineered ruthenium (Ru)-doped cobalt oxides. The effect of the preorganized coordination structure of the MOFs on the morphology and surface properties is investigated. Interestingly, the oxalate-based MOFs derived Ru-doped cobalt oxide (OX-Co 3 O 4 -Ru) exhibits much better surface wettability and more oxygen vacancies than the zeolitic imidazolate framework-67 derived Ru-doped cobalt oxide. As expected, the OX-Co 3 O 4 -Ru owns excellent catalytic properties towards both hydrogen evolution reaction and oxygen evolution reaction with an overpotential of 49 and 286 mV, respectively at a current density of 100 mA cm −2 in 1.0 M KOH. Importantly, the bifunctional OX-Co 3 O 4 -Ru catalyst offers an extremely high current density of 500 mA cm −2 at a cell voltage of 1.71 V for overall water splitting and as well demonstrates robust working stability.
研究领域:
材料科学
·
催化化学
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DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Yuchun Ren,Qiang Zhou,Jun Li,Xun He,Xiaoya Fan,Yongsheng Fu,Xiaodong Fang,Zhengwei Cai,Shengjun Sun,Mohamed S. Hamdy,Jing Zhang,Feng Gong,Yiqing Liu,Xuping Sun
Electrochemical reduction of nitrite (NO 2 – ) not only removes NO 2 – contaminant but also produces high-added value ammonia (NH 3 ). This process, however, needs efficient and selective catalysts for NO 2 − -to-NH 3 conversion. In this study, Ruthenium doped titanium dioxide nanoribbon array supported on Ti plate (Ru–TiO 2 /TP) is proposed as an efficient electrocatalyst for the reduction of NO 2 − to NH 3 . When operated in 0.1 M NaOH containing NO 2 – , such Ru–TiO 2 /TP achieves an ultra-large NH 3 yield of 1.56 mmol h −1 cm −2 and a super-high Faradaic efficiency of 98.9%, superior to its TiO 2 /TP counterpart (0.46 mmol h −1 cm −2 , 74.1%). Furthermore, the reaction mechanism is studied by theoretical calculation.
研究领域:
材料科学
·
电化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Jianding Li,Junping Shi,Yanling Hu,Min Li,Yao Kang
CoFe layered double hydroxide (CoFe LDH) can serve as a cost-effective and active electrocatalyst for oxygen evolution reaction (OER). Unfortunately, it still faces the challenges of low electrical conductivity , stability and limited active sites to achieve the threshold current density with low overpotential. In this study, the strategy of Ru doped together with air plasma treatment was proposed to improve the OER performances of CoFe LDH. The doping of Ru and air plasma process could induce electronic interaction and the oxygen defects to regulate the electronic structure. Significantly, the air plasma treated Ru doped CoFe LDH (P-Ru-CoFe LDH) catalyst achieved superior catalytic properties to the CoFe LDH and RuO 2 benchmarks, which was demonstrated by a relatively smaller overpotential of 275 mV at 10 mA cm −2 and a lower Tafel slope of 107 mV dec −1 for OER. In addition, it also maintained an excellent stability in long-term chronoamperometry test. In general, P-Ru-CoFe LDH catalyst could boost the OER performance through intrinsic electronic structure adjustment with Ru doped and air plasma process. These findings provide an effective pathway to design/develop OER electrocatalysts with high performances by internal electron coupling effects.
研究领域:
材料科学
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电化学
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DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2025
·
IF 4.1
Yong Luo,Feng Gao,Jie Zhang,Xiaoyan Zhang
The development of efficient and durable bifunctional electrocatalysts based on earth-abundant elements for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is critical for advancing sustainable hydrogen production. Herein, a facile one-step hydrothermal strategy was developed to synthesize Ru-doped α-MnO 2 nanoneedles grown on carbon paper (Ru 0.02 MnO 2 /CP) as a novel bifunctional electroccatalyst. Transmission electron microscopy (TEM) and X-ray diffraction (XRD) analyses revealed that Ru incorporation induces uniform lattice distortion in MnO 2 , significantly increasing the density of oxygen vacancies and catalytically active Mn 3+ sites. The structural modifications enhance the intrinsic electrochemical activity and structural stability of MnO 2 during HER/OER in alkaline media. The optimized Ru 0.02 MnO 2 /CP catalyst exhibited exceptional bifunctional performance, achieving low overpotentials of 107 mV (HER) and 261 mV (OER) at 10 mA cm −2 . Furthermore, stability testing under continuous operation reveals <6 % activity loss over 100 h at 10 mA cm −2 . Density functional theory (DFT) calculations revealed that Ru doping optimizes the adsorption/desorption energetics of reaction intermediates (*H for HER; *OH for OER), effectively lowering the kinetic barriers and overpotentials for both half-reactions. This work provides a rational strategy for designing high-performance and cost-effective bifunctional electrocatalyst, advancing their potential application in scalable water electrolysis for sustainable hydrogen production.
研究领域:
材料科学
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电化学
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纳米催化
·
可再生能源
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能源材料
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表面化学
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计算化学
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产品关联
DOI
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-20
·
IF 15.7
Wang Ting,Bai Mingru,Geng Wei,Adeli Mohsen,Ye Ling,Cheng Chong
Reconstructing large, inflammatory maxillofacial defects using stem cell-based therapy faces challenges from adverse microenvironments, including high levels of reactive oxygen species (ROS), inadequate oxygen, and intensive inflammation. Here, inspired by the reaction mechanisms of intracellular antioxidant defense systems, we propose the de novo design of an artificial antioxidase using Ru-doped layered double hydroxide (Ru-hydroxide) for efficient redox homeostasis and maxillofacial bone regeneration. Our studies demonstrate that Ru-hydroxide consists hydroxyls-synergistic monoatomic Ru centers, which efficiently react with oxygen species and collaborate with hydroxyls for rapid proton and electron transfer, thus exhibiting efficient, broad-spectrum, and robust ROS scavenging performance. Moreover, Ru-hydroxide can effectively sustain stem cell viability and osteogenic differentiation in elevated ROS environments, modulating the inflammatory microenvironment during bone tissue regeneration in male mice. We believe this Ru-hydroxide development offers a promising avenue for designing antioxidase-like materials to treat various inflammation-associated disorders, including arthritis, diabetic wounds, enteritis, and bone fractures.
研究领域:
生物材料学
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再生医学
·
炎症研究
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DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）