AICHE JOURNAL
·
2019
·Vol. 65
·期 8
·e16616
·
IF 3.463
Daofei Lv,Jiayu Chen,Yongwei Chen,Zewei Liu,Yuzhi Xu,Chongxiong Duan,Houxiao Wu,Ying Wu,Jing Xiao,Hongxia Xi,Zhong Li,Qibin Xia
Metal–organic frameworks (MOFs) combined with selective adsorption capacity of ethane over ethylene and good moisture stability are highly urged by adsorption industrial community. Here, the moisture stability mechanism of Zr-bptc, UiO-66, PCN-245, and Ni(bdc)(ted) 0.5 were investigated by moisture stability experiments, and computational simulation of metal node-linker breaking energy caused by water. Results show that the moisture stability follows the order of Zr-bptc > UiO-66 > PCN-245 > Ni(bdc)(ted) 0.5 . The different moisture stability for these MOFs is likely attributed to the bond strength between metal center and ligands, the coordination number of metal center, the hydrophobicity of framework, as well as the degree of interpenetrated framework. Additionally, comparing with ethylene-selective MOFs, ethane-selective MOFs have fewer coordinatively unsaturated metal sites. Breakthrough experiments indicated that Zr-bptc is the promising material for ethane/ethylene separation.
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2017
·Vol. 27
·期 37
·1702513
·
IF 12.124
Yingjie Li,Haichuan Zhang,Ming Jiang,Qian Zhang,Peilei He,Xiaoming Sun
The development of highly efficient bifunctional electrocatalysts for both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is crucial for improving the efficiency of overall water splitting, but still remains challenging issue. Herein, 3D self-supported Fe-doped Ni 2 P nanosheet arrays are synthesized on Ni foam by hydrothermal method followed by in situ phosphorization, which serve as bifunctional electrocatalysts for overall water splitting. The as-synthesized (Ni 0.33 Fe 0.67 ) 2 P with moderate Fe doping shows an outstanding OER performance, which only requires an overpotential of ≈230 mV to reach 50 mA cm −2 and is more efficient than the other Fe incorporated Ni 2 P electrodes. In addition, the (Ni 0.33 Fe 0.67 ) 2 P exhibits excellent activity toward HER with a small overpotential of ≈214 mV to reach 50 mA cm −2 . Furthermore, an alkaline electrolyzer is measured using (Ni 0.33 Fe 0.67 ) 2 P electrodes as cathode and anode, respectively, which requires cell voltage of 1.49 V to reach 10 mA cm −2 as well as shows excellent stability with good nanoarray construction. Such good performance is attributed to the high intrinsic activity and superaerophobic surface property.
✓ 已验证
DOI
高影响因子
Chemistry-An Asian Journal
·
2024
·Vol. 19
·期 14
·e202400181
·
IF 3.5
Xingguang Lu,Yuanyuan Ren,Daming Chen,Xiaolong Guo,De Li,Yong Chen
In Li-ion batteries, the origin of memory effect in Al-doped Li 4 Ti 5 O 12 has been revealed as the reversible Al-ion switching between 8a and 16c sites in the spinel structure, but it is still not clear about that for olivine LiFePO 4 , which is one of the most important cathode materials. In this work, a series of Na-doped and Ti-doped LiFePO 4 are prepared in a high-temperature solid-state method, electrochemically investigated in Li-ion batteries and characterized by X-Ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR) and Magic-Angle-Spinning Nuclear Magnetic Resonance (MAS NMR). Compared with non-doped LiFePO 4 , the Ti doping can simultaneously suppress the memory effect and the Li−Fe anti-site, while they are simultaneously enhanced by the Na doping. Meanwhile, the Ti doping improves the electrochemical performance of LiFePO 4 , opposite to the Na doping. Accordingly, a schematic diagram of phase transition is proposed to interpret the memory effect of LiFePO 4 , in which the memory effect is attributed to the defect of Li−Fe anti-site.
✓ 已验证
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2020
·Vol. 104
·期 5
·2181-2190
·
IF 3.502
Wenbin Tang,Yujie Zhang,Changlai Yuan,Xiao Liu,Baohua Zhu,Liufang Meng,Changrong Zhou,Fei Liu,Jiwen Xu,Jiang Wang,Guanghui Rao
In the process of exploring ferroelectric semiconductors, a new system of (1− x ) KNbO 3 – x SrFeO 3−δ ( x = 0.00-0.20) was successfully synthesized via solid-state reaction. The crystal structures, ferroelectric, dielectric, optical, and electrical properties were systematically characterized. The orthorhombic phase with Amm2 space group is detected in all the ceramics. In addition, the orthorhombic and tetragonal phases coexist in 0.80KNbO 3 -0.20SrFeO 3-δ ceramic. The decrease in oxygen octahedron distortion induces a weak ferroelectric polarization. The existence of long-range ferroelectric polarization order in all the ceramics is verified and the bandgap of the ceramics can be tuned to ~2.18 eV. The improved short-circuit photocurrent density ( J sc ) and open-circuit voltage ( V oc ) of the poled 0.95KNbO 3 -0.05SrFeO 3−δ ceramic at 30 kV/cm are ~6.90 nA/cm 2 and 0.04 V, respectively. The activation energies for electrical conductivity of the grains and grain boundaries from 0.90KN–0.10SF ceramic are 0.67 and 0.77 eV, respectively, which indicate the doubly ionized oxygen vacancies. This work provides a new way to tune the optical bandgap/ferroelectric properties of KNbO 3 -based ceramics for potential application in ferroelectric photovoltaic and energy fields.
✓ 已验证
DOI
高影响因子
NANO
·
2019
·
IF 1.293
Liuyang Heng,Zilong Zhang,Shuai Wang,Xiqiao Chen,Xiubo Jia,Zhixiang Tang,Yanhong Zou
Core–shell structured Fe/C have been successfully derived from a metal-organic framework for microwave absorbing. Based on the measured electromagnetic parameters, it is found that the maximum reflection loss (RL) of Fe/C reaches − 4 0 dB at 5.8 GHz with a thickness of 3.0 mm and the broadest absorption bandwidth ( RL < − 1 0 dB) is up to 6.0 GHz (from 11.2 to 17.2 GHz) with a thickness of 1.5 mm. The excellent microwave absorption is mainly ascribed to the multiple reflections, good impedance matching, dielectric loss and interface polarization originating from the core–shell structure. It is believed that Fe/C can be a promising microwave absorbing material.
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2019
·
IF 3.218
Sha Li,Qin Xiang,Muhammad Kashif Aslam,Yuan Cen,Chaozhong Guo,Jiahong Hu,Wei Li,Changguo Chen
For lithium‑sulfur batteries (LSBs), some barriers like low conductivity of sulfur, the large irreversible volume change and the “shuttle” issue, hinder its practical application. In this work, Fe-functionalized mesoporous carbonaceous microspheres with high conductivity and intensive chemical adsorption for polar polysulfide species (LiPSs) were successfully synthesized through economical, scalable solvothermal process and pyrolyzing method. Carbon microspheres with Fe/Fe 3 C components (denoted as CMS900) exhibit high conductivity and significantly enhance the electrochemical reaction kinetics despite 81 wt% sulfur loading. Furthermore, the proper amount surface oxygenic functional groups effectively immobilize sulfur via strong chemical entrapment and suppress the dissolution of LiPSs intermediates during cycling. The CMS900@S has demonstrated a high initial discharge capacity of 1269 mAh g −1 at 0.1C, over 200 cycles with the lowest average capacity fading rate of 0.06% per cycle, which can be treated as an alternative cathode material for LSBs with impressive electrochemical performance.
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2022
·
IF 9.794
Qihao Li,Xin Wang,Chenzhao Liu,Xinwei Yang,Cheng Li,Lichao Jia,Jian Li
Reduced Ce 0.9 Ni 0.1 O 2-δ consists of Ni nanoparticles and Ni-doped CeO 2 (CNO), named (Ni@CNO) with Ni nanoparticles uniformly distributed on CNO substrate with high oxygen vacancy concentration and good water absorption capability. Thus Ni@CNO demonstrates moderate catalytic activity and high carbon deposition resistance during CH 4 steam-reforming. When it is infiltrated into Ni 0.9 Fe 0.1 (NF) metallic support for metal-supported solid oxide fuel cells (MS-SOFCs), forming a continuous coating, Ni@CNO offers CH 4 steam-reforming activity additional to that of the NF support with increased H 2 /CH 4 ratio (3.38 at 600 °C) in the reforming gas, enhanced carbon deposition resistance, and prolonged performance durability. With the Ni@CNO-infiltrated NF support (NFNC), Ni/Ce 0.9 Gd 0.1 O 2-δ (Ni-GDC) function anode, GDC electrolyte, and La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3-δ /Ce 0.9 Gd 0.1 O 2-δ (LSCF-GDC) cathode, the MS-SOFC cell directly fueled by wet CH 4 (3 vol% H 2 O) exhibits a peak power density of 0.343 W cm −2 and the cell voltage durably maintains above 0.6 V at 400 mA cm −2 during a test of 280 h at 600 °C without noticeable carbon deposition in the support and the functional anode. Such performance is comparable to and higher than those reported, suggesting that NFNC is a promising option for direct-CH 4 MS-SOFCs.
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Yuanhui Shen,Chongyan Ruan,Qian Jia,Ying Pan,Hongguang Jin
Chemical looping dry reforming of methane (CL-DRM) is a novel CO2 utilization technology, producing high-quality syngas. Herein, the perovskite oxygen carriers La(Fe0.8–xNixAl0.2)O3 (x = 0, 0.2, 0.4, 0.6, and 0.8) were investigated for the CL-DRM process. Remarkably, La(Fe0.4Ni0.4Al0.2)O3 exhibited 93% CH4 conversion, 100% CO2 conversion, and 100% CO selectivity at 800 °C. Combined activity and characterization results suggest that the doping of Al promotes the nucleation of Ni and the growth of Ni-Fe nanoparticles. Owing to the redox exsolution effect during the cycles, the oxygen carriers are modified with abundant Ni-Fe catalytic sites on the surface, which exhibit excellent catalytic activity, oxygen capacity, and structural stability. In addition, the carbon cycle, which consists of methane decomposition and carbon oxidation, is catalyzed by Ni-Fe nanoparticles for enhanced CH4 and CO2 conversion during the cyclic redox process. We anticipate that the engineering of nanocatalytic sites on oxygen carriers will be conducive to obtaining target products for CL-DRM process optimization.
✓ 已验证
DOI
PubMed
高影响因子
MATERIALS & DESIGN
·
2025
·
IF 7.9
Jingmei Huang,Ning Wang,Xiaoxiao Huang,Shihong Huang,Guoliang Xie,Jianfeng Zhang,Zhengzhao Li
Traumatic brain injury (TBI) is characterized by oxidative stress, neuroinflammation, and microglial dysregulation, leading to secondary neuronal damage. Here, we constructed coordination polymer nanoenzymes (Fe-FN CPs) with multiple enzyme-like activities and favorable biocompatibility. In vitro, Fe-FN CPs suppressed ROS accumulation, reduced pro-inflammatory cytokine release, and promoted microglial polarization toward the M2 phenotype. In vivo, Fe-FN CPs enhanced antioxidant defense, alleviated mitochondrial damage and cerebral edema, restored blood–brain barrier integrity, and improved cognitive performance. Mechanistically, Fe-FN CPs achieved dual regulation by inhibiting pro-inflammatory M1 polarization while promoting anti-inflammatory M2 polarization. These findings demonstrate that Fe-FN CPs exert potent neuroprotective effects and provide a promising nanomedicine strategy for TBI therapy based on natural active compounds.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Hengyi Lu,Huanxiao Li,Chuyang Liu,Jiayi Shao,Fangqi Guo,Xiang Tian,Xiaopeng Li,Pan Ying,Yujing Zhang,Guangbin Ji
To tackle the complex electromagnetic pollution from advances in radar and network technologies, a simple, low-cost, and efficient absorbing agent has been developed. By optimizing the high-temperature sintering of the melamine/reduced iron powder composite system, we successfully created a Fe-C-N multiphase composite material with multi-level structure and dielectric-magnetic loss properties. The gas produced by the decomposition of melamine at high temperatures fosters the formation of a pore structure. Additionally, controlling the heating temperature and holding time effectively manages the phase transition path, allowing for synergistic evolution of the microstructure and regulation of the microwave-absorbing properties. The analysis of SEM images and XRD results identifies the synergistic enhancement mechanism between the multi-level structure and multi-phase. This endows a reflection loss of -75.91 dB at 5.16 GHz for samples held at 700°C for 3 hours (thickness 4.4 mm), with a maximum bandwidth of 4.92 GHz (1.6 mm). It avoids the traditional multi-step process of carbon/nitrogen doping, effectively regulating the phase transition path and microstructure evolution. This provides a new approach to develop lightweight, broadband microwave absorbing materials.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Yufeng Xue,Xiaolin Ye,Zhuonan Yu,Zihao Peng,Shuqing Xing,Jinrong Chen,Qixing Wu,Xuelong Zhou
As global energy demand continues to grow, developing scalable and efficient energy storage systems with high energy density becomes increasingly critical. This study addresses these needs by exploring the use of mixed-acid electrolytes and premixed configurations in Sn-Fe redox flow batteries. We demonstrate significant improvements in solubility, electrochemical stability, and cycling durability. Specifically, incorporating sulfate ions into the electrolyte mitigates the common-ion effect, greatly increasing the solubility of ferrous and stannous chlorides and enabling higher energy densities of 24.22 Wh·L −1 at 80 mA cm −2 under room temperature. Electrochemical analyses reveals that sulfate ions positively shift the Sn 2+ /Sn redox potential by 120 mV at the negative side and also expand the operational voltage window beyond 1.44 V vs. SHE at positive side, significantly reducing undesirable side reactions such as chlorine evolution. Sulfate-rich electrolytes maintain superior stability, achieving coulombic efficiencies above 98 % under diverse operating temperatures. Additionally, a novel hydrogen-Fe 3+ rebalancing method is developed to effectively address Fe 3+ accumulation, restoring battery capacity from near depletion to around 15 Wh·L −1 . These findings underline the potential of mixed-acid premixed electrolyte systems and hydrogen-mediated rebalancing as robust strategies for advancing high-performance, scalable, and sustainable aqueous energy storage solutions.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Huimin Chen,Zhihong Xiao,Kaijun Liang,Rui Ma,Guojun Zou,Sha Li
In order to elucidate the intrinsic relationship between the local coordination environment of the tetrahedrally coordinated metal sites bound to zeolite framework and their catalytic performance in propane dehydrogenation (PDH) reaction, Fe-S-1, Fe-S-1-Na and FeAlPO 4 –5 catalysts with different isolated iron sites were constructed, characterized and evaluated. The catalytic performance tests demonstrated that the C H activation efficiency of the isolated Fe sites decreased in a sequence of {(≡SiO) 3 Fe(HO − Si≡)} > {Fe(OP≡) 4 } > {(≡SiO) 3 Fe(NaO − Si≡)}, while the propylene selectivity followed a trend of {(≡SiO) 3 Fe(NaO − Si≡)} > {(≡SiO) 3 Fe(HO − Si≡)} > {Fe(OP≡) 4 }. Through detailed reaction mechanism study using density functional theory calculations, the rate-determining step (RDS) of PDH is the first dehydrogenation step of propane to propyl intermediate. The intrinsic activity of different Fe sites is closely related to their effective charge redistribution ability during the reaction, which is profoundly affected by its local coordination environment. Isolated Fe sites exhibit activity proportional to their charge transfer efficiency in the initial dehydrogenation step. Higher extent of Fe reduction corresponds to greater catalytic activity, whereas propylene selectivity decreases with increased reduction. This work established the relationship between the catalytic properties of isolated Fe sites embedded in zeolite with their local coordination structure, opening up new prospect for the optimization design of PDH catalysts.
✓ 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）