CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yue Shi,Jiejie Bai,Aixin Ma,Zhitao Zou,Yanru Liu,Haifeng Lin,Dehong Chen,Ruiyong Zhang,Jianping Lai,Lei Wang
The superior electrocatalysts for seawater oxygen evolution reaction (OER) require fast kinetic to promote reactant (OH − ) transport and adsorption, and to optimize oxygenated intermediates (O* and OOH*) adsorption, but also high corrosion resistance by impeding Cl − adsorption under harsh seawater conditions, while the incomprehensive design greatly hinder the system advancement at high current densities. Herein, we propose orderly incorporating amorphous FeSe nanosheets as the dynamic anti-corrosion layer to reinforce charge redistribution of CoNi layered double hydroxide (LDH) nanosheets array and create favorable microenvironments. The ordered two-dimensional/three-dimensional structure prepared by novel non-equilibrium electrodeposition strategy allows amorphous FeSe component not only to activate CoNi-LDH for promoting OH − adsorption, optimizing oxygenated intermediates adsorption and increasing Cl − adsorption energy, but also repel Cl − by dynamic polyanion layer without blocking active sites, thus affording effective seawater OER with low overpotential, excellent stability and high selectivity at high current densities. The integrated CoNi-LDH/FeSe electrode delivers a small overpotential (338 mV at 500 mA cm −2 ) and possesses outstanding stability and selectivity during a 500-hour durability test at 500 mA cm −2 in alkaline seawater.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
CORROSION SCIENCE
·
2021
·
IF 7.205
Jian Zhang,Jin Huang,Ruxia Liu,Guoqiang Luo,Qiang Shen
Immersion tests of AlN in LiF-LiCl-LiBr-Li salt have been performed at 500 °C to study the corrosion behaviour of AlN. The results show that AlN initially corroded at a higher rate (2⋅10 −5 mg/(mm 2 ⋅h)) during 0−50 h than during 50−300 h (6⋅10 -6 mg/(mm 2 ⋅h)) because the formation of an alumina corrosion layer protected the AlN from further corrosion. The addition of metallic Li at low concentrations (<0.1 wt. %) to the molten salt inhibited the corrosion of AlN by preferentially depleting oxygen impurities, while Li at high concentrations (>0.1 wt. %) accelerated corrosion by reacting with YAG in AlN.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Materials Express
·
2022
·Vol. 12
·期 10
·1308-1314
·
IF 1.111
Li Xiaoxuan,Jiang Zhouyu,Wang Mingliang
Sodium bicarbonate blasting was applied to remove the corrosion layer of ancient bronze artifacts. Scanning electron microscopy coupled with energy dispersive spectroscopy (SEM-EDS) was employed to investigate the surface morphology, and element composition of the bronze coin surface
before and after blasting. X-ray diffraction (XRD) was used to characterize the mineralogical composition of products in the corrosion layer of the bronze coin. The products are cerussite (PbCO3), lead oxide (PbO2), cassiterite (SnO2), bobkingite Cu2Cl2(OH)8(H2O)12
and malachite Cu2(CO3)(OH)2 which can be effectively removed by employing an impinge angle of 90°, working pressure at 0.3 MPa. These results indicate that sodium bicarbonate blasting can achieve non-destructive removal of the corrosion layer on the bronze
coin. This work will be helpful for better restoration and preservation of the bronze cultural relics.
研究领域:
文物保护
·
材料科学
✓ 已验证
DOI
高影响因子
FUSION ENGINEERING AND DESIGN
·
2021
·
IF 1.453
Maoqiao Xiang,Jie Zheng,Shaofu Li,Chaoquan Hu,Jingyi Cui,Yingchun Zhang,Qiang Qi,Fen Yue
Lithium-based ceramic tritium breeders would attack the blanket structural materials and produce brittle corrosion layers, causing potential safety hazard. Herein, coated breeders were proposed as advanced tritium breeders to address the issue. Carbon (C), titanium nitride (TiN) and titanium carbide (TiC) were investigated as inert protective shells because they show excellent stability and chemical compatibility with Li 2 TiO 3 and Li 4 SiO 4 . Moreover, for the first time, the C and TiN coated Li 2 TiO 3 and Li 4 SiO 4 pebbles were successfully fabricated by fluidized bed chemical vapor deposition (FBCVD) process, which would significantly decrease the brittle corrosion layers and increase the safety. The deposition behavior and interface reactions were systemically investigated.
研究领域:
核能科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
INFRARED PHYSICS & TECHNOLOGY
·
2022
·
IF 2.997
Ying Xu,Xuelei Jiang
The corrosion of steel plates is one of the main reasons for the decrease of bearing capacity and structural durability. The existing nondestructive testing (NDT) approaches is difficult to accurately detect steel plate corrosion, including the location and degree of corrosion. Therefore, a non-contact nondestructive terahertz time-domain spectroscopy (THz-TDS) is utilized to evaluate the corrosion based on the properties of THz waves. The experimental results show that in the effective frequency range of 0.2–1.2 THz, the refractive index of corrosion products is around 2.8, and Fe 3 O 4 has a significant impact on the optical parameters of the corrosion products mixture. The relative amplitude of the first signal from reflection THz-TDS exhibits a logarithmic relationship with the corrosion time of the steel plates and a linear relationship with the reciprocal of the corrosion time. By the method of extracting the delay time difference in the reflected THz signal, the THz-TDS can accurately measure the corrosion layer with a thickness larger than 40 μm, and the measurement accuracy is over 90 %. Meanwhile, the 3-dimensional (3D) visualization based on the THz method directly describes the true thickness and geographical distribution of the corrosion layer while removing the influence of coating materials. It provides a novel way to quantify corrosion degree of steel plate through NDT of corrosion under coating and extraction of corrosion thickness. The applicability and accuracy of non-contact THz-TDS for corrosion detection are therefore proved.
研究领域:
材料科学
·
无损检测技术
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）