JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2012
·
IF 1.693
Xiao-Ming Peng,Yu-Feng Hu,Jin-Zhu Zhang,Zhi-Xin Wang,Zhe-Yu Li,Chao Miao
Viscosities were measured for the ternary systems Y(NO3)3 + Ce(NO3)3 + H2O, Y(NO3)3 + Nd(NO3)3 + H2O, and Ce(NO3)3 + Nd(NO3)3 + H2O and their binary subsystems Y(NO3)3 + H2O, Ce(NO3)3 + H2O, and Nd(NO3)3 + H2O at (293.15, 298.15, and 308.15) K and atmospheric pressure. The results were used to test the applicability of simple equations for the viscosity of mixed solutions. The predictions agree well with measured values, implying that the viscosities of the examined electrolyte solutions can be related to those of their constituent binary solutions using these simple equations.
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Small
·
2026
·
IF 11.8
Guangyue Liu,Lifang Chen,Zhenyu Liu,Jingchao Chen,Ruimin Ding,Xi Yin
Proton-exchange-membrane water electrolysis (PEMWE) demands high-performance anodes with minimal iridium content, yet conventional Ir-based catalysts suffer from an inherent activity-stability trade-off. We address this challenge by designing neodymium-doped amorphous IrO x catalysts (Nd-IrO x ) that enable precise control over short-range structure to activate the oxide path mechanism (OPM). Incorporating Nd 3+ into an amorphous IrO x matrix dominated by edge-sharing [IrO 6 ] octahedra optimizes the prerequisites for the OPM: lattice distortion tailors Ir-Ir distances to enable direct *O-O* coupling, while electronic modulation stabilizes OH ligands within the local coordination environment, facilitating *O formation. The optimized Nd-IrO x catalyst delivers an ultralow acidic OER overpotential of 254 mV at 10 mA cm −2 with 520 h of stability. Remarkably, PEMWE employing an ultralow Ir-loading anode (0.5 mg Ir cm −2 ) achieves a DOE-relevant current density (4 A cm −2 at 1.9 V) and remarkable 1000-h stability at 1 A cm −2 . This work pioneers short-range engineering in Ir-based oxides, offering fundamental insights for catalyst design and OER pathway control toward efficient hydrogen production.
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PubMed
高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
·
2026
·Vol. 40
·期 5
·e70572
·
IF 4.3
Quanfeng Ye,Lingyi Li,Zhijun Xia,Chenyi Zhang,Jie Zhang
Near-infrared (NIR) luminescent rare-earth complexes are highly sought-after for bioimaging and optical communication due to their distinctive optical characteristics. Herein, a series of Nd 3+ and Yb 3+ complexes were synthesized via a multistep protocol: first, forming an intermediate ligand–metal framework from appropriate precursors; then, coordinating with NdCl 3 ·6H 2 O or YbCl 3 ·6H 2 O; and finally, modifying with specific organic reagents. Their NIR luminescence properties were systematically investigated, revealing characteristic emission bands corresponding to the f-f electronic transitions of Nd 3+ and Yb 3+ . The energy transfer processes within the complex structures and the influence of the ligand environment on emission intensity and lifetime were analyzed. These results offer insights into designing efficient rare-earth NIR luminescent materials, which show promise for NIR-based applications such as bioimaging and optical communication.
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Materials Today Chemistry
·
2026
·
IF 6.7
Sara Adeeba Ismail,Wenqi Lei,Lulu Jiang,Donglin Han
Ba 7 Nb 4 MoO 20 is a pure oxide ion conductor in both dry and wet oxygen atmospheres at the operating temperature of solid oxide fuel cells and has the promising potential to be applied as electrolyte materials. In this work, donor-doping trivalent rare earth elements R ( R = Y, Ce, Nd, Ho, Er and Yb) to replace the divalent Ba cations increases oxygen content slightly, but effectively enhances oxide ion conduction. Although the solubility of these dopants is less than x = 0.02 in Ba 7- x M x Nb 4 MoO 20+0.5 x , the Ba 6.98 Er 0.02 Nb 4 MoO 20.01 composition exhibits the highest conductivity, reaching 0.0066 and 0.0085 S cm −1 at 700 and 800 °C, respectively, nearly 6 times higher than that of pristine Ba 7 Nb 4 MoO 20 . H 2 O/D 2 O isotope effect measurement verifies that these materials are essentially pure oxide conductors even in wet atmospheres. It is hard to believe that the trace-level dopant concentration can influence the conduction behavior effectively. However, the slight change in the oxygen content, particularly in the BaO 2 conduction plane, is possible to influence the conductivities. The oxygen occupancy in the O1 and O5 sites thereby seems to be highly sensitive to and dependent on the occupancy of the dopants over the Ba and Nb/Mo sites.
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Ceramics-Switzerland
·
2026
·Vol. 9
·期 6
·62
·
IF 2.8
Wenhao He,Shaohua Su,Bijun Fang,Shuai Zhang,Xiaolong Lu,Jianning Ding
Lead-free [(Ba0.85Ca0.15)1−1.5xNdx][(Zr0.1Ti0.9)0.995Mn0.005]O3(x mol% Nd/Mn BCZT, x = 0.05, 0.1, 0.5, 1 mol%) ceramics were prepared by the traditional solid-state reaction method, in which the synergistic effects of sintering temperature and Nd/Mn co-doping on the phase structure, microstructural evolution, and electrical properties were systematically investigated. All ceramics exhibit a pure perovskite structure, with the tetragonal (P4mm) phase dominating at room temperature as confirmed by the X-ray diffraction Rietveld refinement. The sintering temperature (1475–1520 °C) is found to be the primary factor governing densification and grain growth, with the relative density peaking at 91.7% for the x = 0.5 mol% sample sintered at 1505 °C. Within this optimized processing window, increasing the Nd content induces a gradual migration of the Curie temperature (TC) toward lower temperatures, accompanied by enhanced relaxor behavior. A highlight of this work is the strategic balance between piezoelectric activity and mechanical quality factor through a “donor–acceptor” co-doping mechanism. Specifically, for the x = 0.5 mol% ceramics, an exceptionally high mechanical quality factor (Qm= 424.5) is achieved for samples sintered at 1490 °C, which is proposed to be associated with the temperature-modulated formation of
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2026
·
IF 9.2
Tao Liu,Chuang Wang,Jingyuan Rao,Renrong Zheng,Yinlin Chang,Zetian Tao
Intermediate-temperature solid oxide fuel cells require cathode with fast oxygen reduction kinetics, tunable defect chemistry, and high stability. Although BaFeO 3 -based perovskites exhibit promising catalytic activity and triple conductivity, their lattice stability and surface reaction kinetics require further improvement. Herein, a series of Ba 1-x Nd x Ce 0.2 Bi 0.1 Fe 0.7 O 3−δ (BNCBFx) cathodes are developed. The effects of Nd incorporation on the crystal structure, oxygen defect behavior, and electrochemical performance are systematically investigated. The single cell with BNCBF50 cathode delivers a low polarization resistance of 0.04 Ω cm 2 and a peak power density of 1730 mW cm −2 at 700 °C. Combined valence-state analysis and theoretical calculations reveal that Nd incorporation promotes charge compensation and oxygen vacancy formation, which in turn enhances oxygen adsorption/activation and lowers the proton migration barrier. Consequently, an ideal balance among lattice stability, oxygen vacancies, and surface catalysis is achieved, providing a rational strategy for designing high-performance SOFC cathodes via defect engineering.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Ruihui Wu,Ronghao Liu,Xiaoxia Liu,Jianwei Zhang,Wenfeng Xue,Yanzhao Yang
The recovery of Nd(III) from NdFeB permanent magnets is gaining increasing attention. In the rare earth elements separation industry, wastewater produced through saponification has become a serious environmental problem. In this work, a novel non-saponification P350-N235 synergistic extraction system was established for the extraction of Nd(III) from nitric acid medium. Almost 100% of Nd(III) was extracted by using a P350-N235 system when the molar fraction (X) of P350 was 0.3. And the synergistic enhancement factor R max reached 60.03. Firstly, the effects of time, pH, volume ratio and other variables were investigated to determine the extraction behaviors. Response surface methodology (RSM) was used to optimize the extraction conditions. The mechanism of synergistic extraction was investigated by FT-IR, UV–vis, NMR methods and ESP maps, indicating that the composition of the extracted complex was Nd(NO 3 ) 3 ·(P350) 2.5 (N235) 2.5 . Then, the extraction thermodynamics and kinetics were also thoroughly investigated, the extraction process is demonstrated to be a spontaneously exothermic reaction. In the NdFeB leaching solution, the synergistic system showed excellent separation factor (β) for Nd/Sm (1.43), Nd/Gd (7.33), and Nd/Dy (9.81). Finally, after 5 cycles, the P350-N235 synergistic system maintained high extraction efficiency. In conclusion, this study overcame the saponification problem in traditional extraction techniques and proposed an environmentally friendly green extraction system.
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高影响因子
Journal of Materials Research and Technology-JMR&T
·
2022
·
IF 6.267
Jingwu Zheng,Siyuan Wang,Shuan Zhang,Wei Cai,Liang Qiao,Haibo Chen,Yao Ying,Wangchang Li,Jing Yu,Shenglei Che
In this paper, a corrosion-resistant glutamic acid (Glu)-Cu-Nano-Al 2 O 3 composite coating with both hydrophobicity and self-healing characteristics was electrodeposited on the sintered Nd-Fe-B surface. The influence of the amount of Nano-Al 2 O 3 added in the acidic Cu 2+ -glutamate (Glu 2− ) solution on the performance of the composite coating was studied, the results show that Nano-Al 2 O 3 inclusion can make the surface of the composite coating appear papillary particles and make the composite coating hydrophobic. By analyzing the products of the composite coating after corrosion in 3.5% NaCl solution, it is shown that the codeposition copper dihydroglutamate (CuGlu 2 H 2 ) and Glu particles in the composite coating are released and dissolved in the solution with pH = 6.5 after copper corrosion, and then complexed with Cu 2+ produced by corrosion to form an insoluble copper glutamate (CuGlu) passive film, which was deposited on the corroded coating to achieve self-repairing function and prevent further corrosion. The hydrophobicity and self-repairing function of the composite coating ensure that the sintered Nd-Fe-B has excellent corrosion resistance.
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JOM
·
2021
·Vol. 73
·期 12
·4376-4386
·
IF 2.474
Zou Qi,Le Qichi,Chen Xingrui,Ban Chunyan,Jia Yonghui,Guo Ruizhen,Wang An
This work investigated the corrosion resistance of AZ80 (Mg-8Al-0.5Zn alloy) with different Nd contents in alkaline solution by the mass loss test, electrochemical test, scanning electron microscope, energy spectrum analysis, and x-ray diffraction. To remove the influence of the Mg 17 Al 12 phase, alloys were heat treated at 410°C for 10 h. Results revealed that Al 2 Nd and AlMnNd phases mainly exist in the alloy. The corrosion rate of the alloy increased when the Nd content was < 0.4 wt.% because the Al 2 Nd phase formed galvanic corrosion with the Mg matrix. With the increase of Nd content, AlMnNd phase appeared in the alloys, which decomposed during the corrosion process and formed a good protective film to reduce the corrosion rate.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Wenjiang Huang,Di Mei,Junlong Zhang,Dongfang Chen,Jingan Li,Liguo Wang,Yifan Zhou,Shijie Zhu,Shaokang Guan
Severe and non-uniform degradation of magnesium (Mg) alloys limits their general application in the field of vascular stents . Polymer coatings , which have been widely used in biodegradable materials, can simultaneously reduce degradation and improve the biocompatibility of Mg alloys. In this study, polycaprolactone (PCL) coating was prepared on Mg–Zn–Y–Nd alloy by electrografting. The microstructure of the prepared coating is significantly influenced by current density and monomer concentration, according to scanning electron microscope/energy dispersive spectroscopy results. The electrografted PCL coating has two molecular weights , 15.5 × 10 3 g·mol −1 and 1.08 × 10 3 g·mol −1 , according to gel permeation chromatography results. Electrochemical and immersion tests show that the electrografted PCL coating has better anti-corrosion properties than the PCL coating prepared using the traditional dipping method. Meanwhile, human umbilical vein endothelial cells and smooth muscle cells culture results show that electrografted PCL coating improves the magnesium alloy’s ability to maintain cell viability . Furthermore, arginine-glycine-aspartic acid was fixed on the surface of the PCL coating to confirm the possibility of functionalisation of the electrografted PCL coating. The results show that the composite coating promotes cell adhesion.
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高影响因子
RSC Advances
·
2014
·Vol. 4
·期 76
·40352-40358
·
IF 3.708
Xing Li,Yong-De Yan,Mi-Lin Zhang,Yun Xue,Hao Tang,De-Bin Ji,Zhi-Jian Zhang
The electrochemical reduction of Nd(III) was investigated on an inert W and a liquid Al electrode in molten NaCl–KCl eutectic salt. On both W and liquid Al electrodes, the reduction of Nd(III) ions to Nd(0) metal occurred in a single reaction step, which avoids the corrosion reaction: 2Nd(III) + Nd → 3Nd(II). Therefore, corrosion of Nd metal in this molten chloride media is not expected. The co-reduction behavior of Nd(III) and Al(III) ions was studied on a W electrode in NaCl–KCl–AlCl3–NdCl3 melts. Five kinds of Al–Nd intermetallic compound were detected via cyclic voltammetry and open circuit chronopotentiometry. Intermittent galvanostatic electrolysis was employed on liquid Al electrodes to extract Nd in the form of Al–Nd alloys in NaCl–KCl–NdCl3 melts. Nd, AlNd3, Al2Nd, and AlNd phases were identified by X-ray diffraction (XRD). With the increase of electrolytic time, the content of Nd-rich Al–Nd intermetallic compounds in the Al–Nd alloy increased. The morphology and micro-zone chemical analysis of the deposits were characterized by a scanning electron microscope (SEM) equipped with an energy dispersive spectrometer (EDS), and the Al11Nd3 phase was confirmed by EDS analysis.
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JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2016
·
IF 2.933
Chaoyang Ma,Fei Tang,Jiangfeng Zhu,Zicheng Wen,Yang Yu,Ke Wang,Miaomiao Du,Jiantao Zhang,Jiaqi Long,Xuanyi Yuan,Wang Guo,Yongge Cao
Composite structures of YAG/1 at% Nd-doped LuAG/YAG, YAG/1 at% Nd-doped LuAG and YAG/5 at% Yb-doped LuAG transparent ceramics were successfully fabricated by non-aqueous tape-casting method and vacuum sintering technology. Cation (Y 3+ , Lu 3+ , Nd 3+ , Yb 3+ ) diffusion behavior across the contact boundaries between ytterbium (Yb) or neodymium (Nd) doped lutetium aluminum garnet (LuAG) and un-doped yttrium aluminum garnet (YAG) was studied by the electron probe X-ray micro-analysis (EPMA). The diffusion concentration profile curves were well modeled by Harrison type B kinetics. Curves of concentration vs depth were well fitted by Fick’s second low and the log of the average concentration varies as 6/5 power of penetration depth in the diffusion range was demonstrated. Meanwhile, the bulk diffusion coefficient and grain boundary diffusion coefficient were calculated. For YAG/Nd:LuAG transparent ceramic, under an 808 nm diode laser pumping, the 1064 nm continuous wave (C.W.) laser output beam with good quality was achieved.
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危险品化学品经营许可证（带存储）