SENSORS AND ACTUATORS B-CHEMICAL
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2024
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IF 8
Hairui Fang,Hong Chen,Feng Zhang,Rong Tan,Chenshuai Han,Xin Ai,Xiao Ma,Yiwen Cui,Dong Wang
Sulfur hexafluoride (SF 6 ) from Gas Insulated Switchgear (GIS) will decompose and produce hydrogen sulfide (H 2 S) in the event of equipment failure. Therefore, the detection of H 2 S can determine whether the equipment has malfunctioned. Due to the low concentration of the SF 6 decomposition product H 2 S and its application in industrial environments, sensors must have a low detection limit and rapid response time . Considering that the oxides of rare earth elements can improve the sensing characteristics, praseodymium oxide (Pr 6 O 11 )-indium oxide (In 2 O 3 ) was prepared. The impact of Pr 6 O 11 doping on In 2 O 3 was investigated through characterization methods. To validate its feasibility for use in GIS, the best sensor (F3) exhibits good sensing characteristics for H 2 S in the SF 6 and air ambient. The responses to 10 parts per million (ppm) H 2 S at 190°C were 146.6 in SF 6 and 190.8 in air. In SF 6 ambient, the F3 sensor demonstrated a low detection limit (50 parts per billion (ppb)). The good sensing characteristics are attributed to the doping of rare earth elements, which induces an increase in the proportion of defect oxygen and accelerate the chemical reaction. The sensing characteristics of the material can be attributed to the doping of Pr 6 O 11 and the electronic effect. This study provides a novel approach for detecting H 2 S generated from SF 6 decomposition.
研究领域:
材料科学
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电气工程
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传感器技术
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产品关联
DOI
高影响因子
CATALYSIS LETTERS
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2024
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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
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材料科学
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物理化学
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
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IF 5.6
Haoxin Lin,Lin Tian,Xiaoyan Liu,Guocheng Wang,Chongchong Xie,Guohua Li,Chao Tian
In order to improve the comprehensive utilization rate of magnesite flotation tailings and solve its accumulation pollution problem. In this work, Mg 2 SiO 4 -MgO refractories were prepared by solid-phase method using magnesite flotation tailings as raw material and Pr 6 O 11 as additive. The adjustment mechanism of Pr 6 O 11 on the intergranular binding phase of Mg 2 SiO 4 -MgO refractories was investigated and the optimal addition amount of Pr 6 O 11 was determined through thermodynamic calculations, DSC test, phase composition test, microstructure observations and physical property tests. The results show that when Pr 6 O 11 is not added, the intergranular binding phase of Mg 2 SiO 4 -MgO refractories is CaO·MgO·SiO 2 . After Pr 6 O 11 is added, Pr 6 O 11 takes advantage of its high reactivity to extract SiO 2 and CaO from the MgO-SiO 2 -CaO system, which is supposed to synthesize CaO·MgO·SiO 2 , and reacts to produce Ca 2 Pr 8 (SiO 4 ) 6 O 2 , which consumes the reactants for synthesizing CaO·MgO·SiO 2 , thus inhibiting the production of CaO·MgO·SiO 2 . Thereby adjust the refractories intergranular binding phase from low melting point CaO·MgO·SiO 2 (melting point:1498°C) to high melting point Ca 2 Pr 8 (SiO 4 ) 6 O 2 (melting point:1780°C), which resulted in the improvement of the refractories's high temperature resistance and thermal shock resistance. At the same time, Pr 6 O 11 can form solid solution with Mg 2 SiO 4 and MgO to promote the sintering densification of the refractories, and the overall performance of the refractories is optimal when the addition amount of Pr 6 O 11 is 2wt%.
研究领域:
材料科学
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无机非金属材料
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2024
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IF 8.1
Yuan Li,Yanting Tian,Zhanfeng Li,Xueying Wu,Lei Wang,Tianlong Bian
Cobalt-free La 0.5 Sr 0.5 Fe 0.9 Mo 0.1 O 3-δ (LSFM) oxide is particularly investigated as a durable and efficient oxygen electrode material for the reversible solid oxide cells (RSOCs) in this study. Pr 6 O 11 nano-catalysts are introduced into LSFM oxygen electrode as synergistic catalysts to enhance and optimize the electrode reactions. Results demonstrate an effectively promoted oxygen reduction and evolution reaction kinetics of the Pr 6 O 11 decorated LSFM electrode. Polarization resistances ( R p ) of LSFM electrode are dramatically reduced with the increasing Pr 6 O 11 nano-catalysts and the lowest R p of 0.039 Ω cm 2 is obtained at 800 °C, which is ∼97% lower than that of the LSFM electrode. The Pr 6 O 11 decorated LSFM oxygen electrode also displays a superior durability under cyclic anodic and cathodic polarizations. Furthermore, both the maximum power density and electrolytic current density of the Pr 6 O 11 decorated cell are more than 2 times that of the LSFM cell. Results make clear reliability of the Pr 6 O 11 decorated LSFM to be a promising oxygen electrode for RSOCs.
研究领域:
材料科学
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能源技术
✓ 已验证
DOI
高影响因子
RSC Advances
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2018
·Vol. 8
·期 31
·17504-17510
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IF 2.936
Nan Jiang,Xiao Zhou,Yi-Fan Jiang,Zhi-Wei Zhao,Liu-Bo Ma,Cong-Cong Shen,Ya-Nan Liu,Cheng-Zong Yuan,Shafaq Sahar,An-Wu Xu
The design and development of highly efficient and long lifetime Pd-based catalysts for hydrogenation reactions have attracted significant research interest over the past few decades. Rational selection of supports for Pd loadings with strong metal-support interaction (SMSI) is beneficial for boosting catalytic activity and stability. In this context, we have developed a facile approach for uniformly immobilizing ultra-small Pd nanoparticles (NPs) with a clean surface on a Pr6O11 support by a hydrogen thermal reduction method. The hydrogenations of p-nitrophenol and styrene are used as model reactions to evaluate the catalytic efficiency. The results show highly efficient styrene hydrogenation performance under 1 atm H2 at room temperature with a TOF value as high as 8957.7 h−1, and the rate constant value of p-nitrophenol reduction is 0.0191 s−1. Strong metal-support interaction and good dispersion of Pd nanoparticles, as demonstrated by XPS and HRTEM results, contribute to the excellent hydrogenation performance. Electron paramagnetic resonance (EPR) results suggest the presence of oxygen vacancies in the support, which serve as electron donors and enhance the adsorption and activation of reactants and subsequent conversion into products. Moreover, the catalyst can be recovered and reused up to 10 consecutive cycles without marked loss of activity. Overall, our results indicate that oxygen-deficient Pr6O11 nanorods (NRs) not only play a role as support but also work as the promoter to substantially boost the catalytic activities for organic transformations, therefore, providing a novel strategy to develop other high-performance nanostructured catalysts for environmental sustainability.
研究领域:
催化化学
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材料科学
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环境科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
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2024
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IF 8.1
Xuanlin Lu,Zhi Yang,Jian Zhang,Xin Zhao,Jiaxuan Chen,Wen Liu,Yicheng Zhao,Yongdan Li
Oxygen reduction and proton conduction originated from hydration are two key steps in the cathode process of protonic ceramic fuel cells. In this work, Pr 6 O 11 is impregnated into a cobalt-free BaCe 0.2 Fe 0.8 O 3-δ cathode, resulting in an improved activity of lattice oxygen and a moderate enhancement of the electrical conductivity, both of which are beneficial for charge transfer, the rate-determining step of oxygen reduction process at the cathode. The polarization resistance of bare BaCe 0.2 Fe 0.8 O 3-δ cathode for oxygen reduction is 0.115 Ω cm 2 at 700 °C, which is reduced significantly to 0.039 Ω cm 2 with the addition of 30 wt% Pr 6 O 11 . Besides, the hydration ability of the cathode is also improved with Pr 6 O 11 , and thus the combination of proton and oxygen is facilitated. A single cell with 30 wt% Pr 6 O 11 -70 wt% BaCe 0.2 Fe 0.8 O 3-δ composite cathode exhibits the highest maximum power density of 1406 mW cm −2 at 700 °C. The composite cathode also shows a good stability.
研究领域:
材料科学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Jie Zheng,Ying Li,Yongtao Huang,Zezhong Wang,Wei Zhang,Chunsheng Zhuang
The cathode is a critical component of proton-conducting fuel cells (H-SOFCs), as its performance is influenced by the distinct atmospheric conditions on the cathode side. In this study, Pr 6 O 11 was incorporated into the BaCo 0.5 Fe 0.5 O 3-δ cathode material to form BaCo 0.5 Fe 0.5 O 3-δ -Pr 6 O 11 heterostructured composites. These heterostructures significantly enhance oxygen ion diffusion and valence electron transitions, leading to improved electrical conductivity and electrocatalytic activity in H-SOFCs. XPS analysis demonstrated that the BaCo 0.5 Fe 0.5 O 3-δ -Pr 6 O 11 cathode exhibits superior chemical stability and oxygen adsorption capacity. Symmetric cell tests revealed that its polarization impedance is significantly lower than that of single-phase BaCo 0.5 Fe 0.5 O 3-δ , indicating excellent ORR activity. Furthermore, an H-SOFC with a BaCo 0.5 Fe 0.5 O 3-δ -Pr 6 O 11 cathode achieved a peak power density of 847 mW cm −2 at 700 °C, markedly outperforming the single-phase cathode.
研究领域:
材料科学
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能源工程
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2017
·
IF 3.359
Junliang Wang,Yuanyang Lou,Xiaowei Zhuang,Shuang Song,Weiping Liu,Chao Xu
A magnetic core–shell Pr 6 O 11 /SiO 2 @Fe 3 O 4 catalyst using chemical precipitation was prepared. Its structure was confirmed by X-ray diffraction, X-ray photoelectron spectroscopy, transmission electron microscopy, and energy-dispersive X-ray spectrum. The catalytic activity was evaluated by the catalytic ozonation of acetochlor. The results showed that the catalyst could effectively improve the acetochlor removal and mineralization. The total organic carbon removal reached 37.3% with the catalyst at 120 min, whereas the removal was 14.1% with ozonation alone. The catalyst was proved to be stable and recyclable by determining the concentration of the leaching praseodymium ions and the catalyst’s activity after repeated use. The effect of the radical scavengers indicated that the catalytic ozonation process followed an OH reaction mechanism. In addition, we employed Chlorella and zebrafish as model organisms to investigate the aquatic toxicity of the treated solution and the dissolved praseodymium ions. We found that the aquatic toxicity of the reaction solution decreased with an increase in the degradation time, and no obvious toxicity was found for the dissolved praseodymium ions.
研究领域:
环境科学
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催化材料
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毒理学
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产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2017
·
IF 2.843
Xinxin Zhang,Shiyang Cheng,Wei Zhang,Cai Zhang,Nicholas E. Drewett,Xiyang Wang,Dong Wang,Seung Jo Yoo,Jin-Gyu Kim,Weitao Zheng
Ag/Pr6O11 catalysts supported by either Pr6O11 nanorods (Pr6O11-NRs) or nanoparticles (Pr6O11-NPs) were prepared by conventional incipient wetness impregnation. The nanocomposite of Ag/Pr6O11-NRs demonstrated a higher catalytic activity for CO oxidation than Ag/Pr6O11-NPs at lower temperatures. This improved performance may be ascribed to the mesoporous features and resultant oxygen vacancies of the Pr6O11 nanorods support, as well as the large surface area and homogeneous loading of Ag species. As a result, 98.7 and 100% CO conversions were achieved at 210 and 240 °C for Ag/Pr6O11-NRs, while Ag/Pr6O11-NPs require a temperature of 320 °C to obtain the 100% CO conversion rate. These findings reveal that Pr6O11-NRs is the preferable support, comparative to Pr6O11-NPs, for Ag/Pr6O11 catalysts, for CO oxidation.
研究领域:
催化化学
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纳米材料科学
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环境化学
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表面科学
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能源化学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.6
Zhaoxiong Chen,Jian Liu,Zhanpeng Fu,Weijian Yu,Wang Ke,Jiaji Tang,Guijing Xu,Liang Deng,Lei Zhao,Zhen-Bo Wang
Spinel LiNi 0.5 Mn 1.5 O 4 (LNMO) is a promising high-voltage cathode material for next generation lithium-ion batteries. However, its application is limited by severe interfacial side reactions and structural degradation under high-voltage conditions, which lead to poor cycling stability and inferior rate performance. Conventional full-coverage coatings cannot withstand cyclic mechanical stress during charge-discharge processes, easily causing cracks and performance fading. In this work, an island-like coating structure based on Pr 6 O 11 nanoparticles was immobilized on the LNMO surface (Pr 6 O 11 -LNMO). The island-like structure can adapt to volume changes during cycling, inhibit the dissolution of transition metals and slow down electrolyte decomposition. The oxygen vacancies in Pr 6 O 11 enable fast Li + transport, and the Pr 4+ /Pr 3+ valence equilibrium of Pr 6 O 11 can increase the Mn 4+ content in LNMO, thereby alleviating the Jahn-Teller distortion induced by Mn 3+ . In-situ XRD results reveal that faster Li + kinetics and better interfacial stability inhibit the two-phase transition of LNMO and orient it toward a reversible solid-solution reaction. The optimized Pr 6 O 11 -LNMO exhibits superior cycling stability (94.6% capacity retention after 500 cycles at 1C) and excellent rate capability (111.9 mAh g −1 at 20C). This strategy provides a promising solution for preparing durable high-voltage LNMO cathodes and facilitates the advancement of lithium-ion batteries with high energy density.
✓ 已验证
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Liwei Su,Yifan Zhang,Xingyi Zhan,Lei Zhang,Yizhe Zhao,Xiaolan Zhu,Hao Wu,Huan Chen,Chaoqi Shen,Lianbang Wang
Many challenges still exist in lithium–oxygen batteries (LOBs), particularly exploring an efficient catalyst to optimize the reaction pathway and regulate the Li2O2 nucleation. Pr6O11 has a unique 4f electronic structure and the highest oxygen ion mobility among rare earth oxides, exhibiting superior electronic, optical, and chemical properties. These unique properties might endow it with advanced catalytic activities for LOBs. This work reports two crystal forms of Pr6O11 as novel catalysts and regulates the oxygen vacancy (Vo) concentrations by feasible calcination. Thermogravimetric analysis, X-ray diffraction, and X-ray photoelectron spectroscopy (XPS) confirm the conversion from commercial Pr6O11 to cubic fluorite Pr6O11 and Vo-rich Pr6O11. Photographs, high-resolution transmission electron microscopy, selected area electron diffraction, XPS, and electron paramagnetic resonance robustly demonstrate the temperature-dependent evolution of Vo. Ex situ XPS, scanning electron microscopy, and electrochemical techniques are used to study the catalytic mechanism and electrochemical reversibility. It is found that an appropriate Vo concentration can boost O2 adsorption/desorption, accelerate electron transport, and reduce the reaction energy barrier. Vo-rich Pr6O11 optimizes the reaction pathway by offering an intermediate Li2–xO2 (with metalloid conductivity) and adjusting Li2O2 into vertically staggered nanoflakes, effectively avoiding the suffocation of the catalytic surface and presenting excellent capacity, cycling stability, and rate performance.
研究领域:
材料科学
·
电化学
·
储能
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催化
·
纳米材料
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Long Liang,Chunli Wang,Mingan Ren,Shouliang Li,Zhijian Wu,Limin Wang,Fei Liang
The pivotal steps for the practical application of dehydrogenation of aluminum hydride (AlH3) have been to decrease the temperature and increase the content of AlH3. Herein, the initial dehydrogenation temperature of AlH3 decreased to 43 °C with the amount of released hydrogen of 8.3 wt % via introducing TiO2 and Pr6O11 with synergistic catalysis effects, and its apparent activation energy of the dehydrogenation reaction decreased to 56.1 kJ mol–1, which is 52% lower than that of pure AlH3. These differences in performances of the samples are further evaluated by determining the electron density of Al–H bonds during dehydrogenation. The multiple valence state conversions of TiO2 and Pr6O11 promoted the electron transfer of H in AlH3, and a novel dehydrogenation pathway of PrH2.37 formed simultaneously, which could accelerate the breakage of Al–H bonds. The density functional theory calculations further exhibit that there are fewer electrons around H in AlH3 and the Al–H bond energy is weaker at the atomic levels, which is more conducive to the release of hydrogen. A higher hydrogen storage capacity and a lower dehydrogenation temperature make AlH3 one of the most promising hydrogen source media for mobile applications.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
PubMed
高影响因子
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