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期刊论文 8

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2023 3

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单壳体结构 1

大跨桥梁 1

建筑 1

柔性成型系统 1

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海洋环境 1

生物复合材料 1

纤维增强复合材料 1

纤维增强复合材料(FRP) 1

结构设计 1

高性能混凝土 1

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Facile generation of highly durable thiol-functionalized polyhedral oligomeric silsesquioxane based superhydrophobic

《化学科学与工程前沿（英文）》 2022年 第16卷 第8期   页码 1247-1258 doi: 10.1007/s11705-021-2124-0

摘要： In this study, a durable superhydrophobic/superoleophilic melamine foam was fabricated by a facile and rapid one-step thiol-ene click chemistry and Michael addition reaction, which demonstrated excellent robustness in oil/water separation. First, 1H, 1H, 2H-perfluoro-1-hexene reacted with thiol-functionalized polyhedral oligomeric silsesquioxane via the thiol-ene click chemistry to obtain a fluorinated thiol-functionalized polyhedral oligomeric silsesquioxane solution. Subsequently, the melamine foam was immersed to the solution system to form nanoaggregates on the melamine foam surface by the Michael addition reaction in the presence of ultraviolet light. The micro/nano rough structure and low surface energy of the nanoaggregates layer endowed the pristine melamine foam with superhydrophobicity; the water contact angle was greater than 150°. More importantly, the as-prepared melamine foam could withstand harsh conditions, such as a corrosive solution environment, strong ultraviolet light, mechanical compression, high and low temperature exposure, and ultrasonic washing. Driven by gravity, the as-prepared melamine foam could efficiently separate the oil/water mixtures and maintain 98% separation efficiency at high and low temperatures. In addition, it maintained the desirable absorption capability in different oil/organic solvents even after 15 absorption cycles. Accordingly, this facile, low-cost, and robust one-step method provides important support for the superhydrophobic oil/water separation field.

关键词： superhydrophobic melamine foam     thiol-functionalized polyhedral oligomeric silsesquioxane     durable     oil/water separation    

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Highly active and durable Pd-Cu catalysts for oxygen reduction in alkaline exchange membrane fuel cells

Xiong PENG, Travis J. OMASTA, Justin M. ROLLER, William E. MUSTAIN

《能源前沿（英文）》 2017年 第11卷 第3期   页码 299-309 doi: 10.1007/s11708-017-0495-1

摘要： A Pd-Cu catalyst, with primary B2-type phase, supported by VulcanXC-7R carbon was synthesized via a solvothermal method. The catalysts were physically and electrochemically characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM) and both cyclic and linear sweep voltammetry using a rotating disk electrode (RDE). During the RDE testing, the half-wave potential of the Pd-Cu/Vulcan catalyst was 50 mV higher compared to that of commercial Pt/C catalyst for the oxygen reduction reaction (ORR) in alkaline media. The Pd-Cu/Vulcan exhibited a specific activity of 1.27 mA/cm and a mass activity of 0.59 A/mg at 0.9 V, which were 4 and 3 times greater than that of the commercial Pt/C catalyst, respectively. The Pd-Cu/Vulcan catalyst also showed higher alkaline exchange membrane fuel cell (AEMFC) performance, with operating power densities of 1100 MW/cm operating on H /O and 700 MW/cm operating on H /Air (CO -free), which were markedly higher than those of the commercial Pt/C. The Pd-Cu/Vulcan catalyst also exhibited high stability during a short-term, AEMFC durability test, with only around 11% performance loss after 30 hours of operation, an improvement over most AEMFCs reported in the literature to date.

关键词： alkaline exchange membrane (AEM)     fuel cell     Pd-Cu     oxygen reduction     high performance     water    

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Synergistic effect of V and Fe in Ni/Fe/V ternary layered double hydroxides for efficient and durable

《化学科学与工程前沿（英文）》 2023年 第17卷 第1期   页码 102-115 doi: 10.1007/s11705-022-2179-6

摘要： High-performance and stable electrocatalysts are vital for the oxygen evolution reaction (OER). Herein, via a one-pot hydrothermal method, Ni/Fe/V ternary layered double hydroxides (NiFeV-LDH) derived from Ni foam are fabricated to work as highly active and durable electrocatalysts for OER. By changing the feeding ratio of Fe and V salts, the prepared ternary hydroxides were optimized. At an Fe:V ratio of 0.5:0.5, NiFeV-LDH exhibits outstanding OER activity superior to that of the binary hydroxides, requiring overpotentials of 269 and 274 mV at 50 mA·cm–2 in the linear sweep voltammetry and sampled current voltammetry measurements, respectively. Importantly, NiFeV-LDH shows extraordinary long-term stability (≥ 75 h) at an extremely high current density of 200 mA·cm–2. In contrast, the binary hydroxides present quick decay at 200 mA·cm–2 or even reduced current densities (150 and 100 mA·cm–2). The outstanding OER performance of NiFeV-LDH benefits from the synergistic effect of V and Fe while doping the third metal into bimetallic hydroxide layers: (a) Fe plays a crucial role as the active site; (b) electron-withdrawing V stabilizes the high valence state of Fe, thus accelerating the OER process; (c) V further offers great stabilization for the formed intermediate of FeOOH, thus achieving superior durability.

关键词： oxygen evolution reaction     electrocatalysts     ternary layered double hydroxides     long-term stability    

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Oxygen-deficient MoO/NiS heterostructure grown on nickel foam as efficient and durable self-supported

《化学科学与工程前沿（英文）》 2023年 第17卷 第4期   页码 437-448 doi: 10.1007/s11705-022-2228-1

摘要： High-performance and ultra-durable electrocatalysts are vital for hydrogen evolution reaction (HER) during water splitting. Herein, by one-pot solvothermal method, MoOx/Ni3S2 spheres comprising Ni3S2 nanoparticles inside and oxygen-deficient amorphous MoOx outside in situ grow on Ni foam (NF), to assembly the heterostructure composites of MoOx/Ni3S2/NF. By adjusting volume ratio of the solvents of ethanol to water, the optimized MoOx/Ni3S2/NF-11 exhibits the best HER performance, requiring an extremely low overpotential of 76 mV to achieve the current density of 10 mA∙cm‒2 (η10 = 76 mV) and an ultra-small Tafel slope of 46 mV∙dec‒1 in 0.5 mol∙L‒1 H2SO4. More importantly, the catalyst shows prominent high catalytic stability for HER (> 100 h). The acid-resistant MoOx wraps the inside Ni3S2/NF to ensure the high stability of the catalyst under acidic conditions. Density functional theory calculations confirm that the existing oxygen vacancy and MoOx/Ni3S2 heterostructure are both beneficial to the reduced Gibbs free energy of hydrogen adsorption (|∆GH*|) over Mo sites, which act as main active sites. The heterostructure effectively decreases the formation energy of O vacancy, leading to surface reconstruction of the catalyst, further improving HER performance. The MoOx/Ni3S2/NF is promising to serve as a highly effective and durable electrocatalyst toward HER.

关键词： molybdenum oxides     oxygen vacancies     heterostructure     electrocatalysts     hydrogen evolution reaction    

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Durable and recyclable BiOBr/silk fibroin-cellulose acetate composite film for efficient photodegradation

《化学科学与工程前沿（英文）》 2023年 第17卷 第11期   页码 1765-1775 doi: 10.1007/s11705-023-2323-y

摘要： A stable and recyclable of BiOBr/silk fibroin-cellulose acetate composite film was prepared by blending-wet phase transformation and in situ precipitate technology. The cellulose acetate film modified by silk fibroin formed a finger-shaped porous structure, which provided a large space for the uniform growth of BiOBr nanosheets and facilitated the shuttle flow of dyes in film. The morphology, phase structure, and optical properties of the composite films were characterized using various techniques, and their photocatalytic performance for dye wastewater was evaluated under visible light irradiation. Results showed that the BiOBr/SF-CA composite film exhibited efficient photocatalytic activity with 99.9% of rhodamine B degradation rate. Moreover, the composite film maintained high catalytic stability because Bi as the active species deposited on the film showed almost no loss. Finally, the possible photocatalytic mechanisms in the BiOBr/SF-CA composite film were speculated through radical-trapping experiments and electron spin resonance testing.

关键词： BiOBr nanosheet     cellulose acetate     silk fibroin     photocatalytic degradation     dye wastewater    

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Nickel-carbonate nanowire array: An efficient and durable electrocatalyst for water oxidation under nearly

Yuyao Ji, Min Ma, Xuqiang Ji, Xiaoli Xiong, Xuping Sun

《化学科学与工程前沿（英文）》 2018年 第12卷 第3期   页码 467-472 doi: 10.1007/s11705-018-1717-8

摘要：

It is highly attractive but still remains a great challenge to develop an efficient electrocatalyst for oxygen evolution reaction under nearly neutral conditions. In this work, we report the transformation of Ni3S2 nanowire array on nickel foam into the amorphous nickel carbonate nanowire array on nickel foam (NiCO3/NF). The resulting NiCO3/NF shows high electrocatalytic activity towards water oxidation and affords current density of 50 mA·cm−2 at overpotential of 395 mV in 1.0 mol·L−1 KHCO3. Moreover, this NiCO3/NF is also durable with a long-term electrochemical durability of 60 h. This catalyst electrode achieves a high turnover frequency of 0.21 mol O2·s−1 at the overpotential of 500 mV.

关键词： water oxidation     NiCO3/NF     nearly neutral conditions     superior activity     electocatalyst    

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纤维增强复合材料应用于荷兰桥梁设计：面临创新性、可持续性和耐久性的建筑挑战

Joris Smits

《工程（英文）》 2016年 第2卷 第4期   页码 518-527 doi: 10.1016/J.ENG.2016.04.004

摘要：

本文综述了纤维增强复合材料(FRP) 在荷兰桥梁的建筑性与结构性设计方面的应用，讨论了这种相对较新的材料给建筑师和工程师带来的挑战和机遇。本文涵盖了纤维增强复合材料的最新结构处理方案，以及对于纤维增强复合材料在建筑方面应用的讨论，这些应用来源于笔者与其他科研人员在建筑上的实践。

关键词： 建筑     结构设计     桥梁设计     纤维增强复合材料(FRP)     生物复合材料     柔性成型系统     单壳体结构    

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海洋桥梁工程轻质、高强、耐久性结构材料现状及发展趋势研究

吴智深 ,刘加平 ,邹德辉 ,汪昕 ,史健喆

《中国工程科学》 2019年 第21卷 第3期   页码 31-40 doi: 10.15302/J-SSCAE-2019.03.014

摘要：

本文针对海洋环境下大跨桥梁突出的长期服役性能问题和轻量化需求，通过对轻质、高强、耐久的材料深入调研，总结了高性能钢、高性能混凝土及纤维增强复合材料的研究现状及发展趋势，介绍了上述材料在桥梁关键区域的针对性应用技术，并提出海洋桥梁工程轻质、高强、耐久材料发展的战略建议，以满足海洋桥梁工程高性能、长寿命、轻量化的需求，突破海洋环境下大跨桥梁的耐久和跨度瓶颈。

关键词： 海洋环境     大跨桥梁     高性能钢     高性能混凝土     纤维增强复合材料    

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标题 作者 时间 类型 操作

Facile generation of highly durable thiol-functionalized polyhedral oligomeric silsesquioxane based superhydrophobic

期刊论文

Highly active and durable Pd-Cu catalysts for oxygen reduction in alkaline exchange membrane fuel cells

Xiong PENG, Travis J. OMASTA, Justin M. ROLLER, William E. MUSTAIN

期刊论文

Synergistic effect of V and Fe in Ni/Fe/V ternary layered double hydroxides for efficient and durable

期刊论文

Oxygen-deficient MoO/NiS heterostructure grown on nickel foam as efficient and durable self-supported

期刊论文

Durable and recyclable BiOBr/silk fibroin-cellulose acetate composite film for efficient photodegradation

期刊论文

Nickel-carbonate nanowire array: An efficient and durable electrocatalyst for water oxidation under nearly

Yuyao Ji, Min Ma, Xuqiang Ji, Xiaoli Xiong, Xuping Sun

期刊论文

纤维增强复合材料应用于荷兰桥梁设计：面临创新性、可持续性和耐久性的建筑挑战

Joris Smits

期刊论文

海洋桥梁工程轻质、高强、耐久性结构材料现状及发展趋势研究

吴智深 ,刘加平 ,邹德辉 ,汪昕 ,史健喆

期刊论文