JOURNAL OF POWER SOURCES
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2017
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IF 6.395
Kening Sun,Jia Liu,Jie Feng,Hong Yuan,Minjie He,Chunming Xu,Zhenhua Wang,Wang Sun,Jinshuo Qiao
B-site substituted Sr 2 Fe 1.4 X 0.1 Mo 0.5 O 6-δ (SFXM, X = Bi, Al and Mg) are evaluated as anode materials for hybrid direct carbon fuel cells (HDCFCs). The structure, morphology, conductivity and catalytic activity of the as-prepared SFXM anode are systematically investigated. Under a reducing atmosphere, the exsolution of metallic Fe from the SFXM perovskite lattice are demonstrated by the XRD , SEM and TEM observations. Further element valence analysis on reduced SFXM suggests the X doping significantly alters the Fe 3+ /Fe 2+ and Mo 6+ /Mo 5+ ratio, and thus beneficial to the intrinsic conductivity of SFXM. All these advantages are responsible for the good electrochemical performances of SFXM anodes. Meanwhile, among these SFXM anodes, the conductivity, catalytic activity and electrochemical performance all obey the order of SFBM > SFAM > SFMM. The maximum power densities of the La 0.8 Sr 0.2 Ga 0.8 Mg 0.2 O 3 electrolyte supported single cell with SFBM as the anode reaches 399, 287 and 141 mW cm −2 at 800 °C, 750 °C and 700 °C, respectively. Such designed B-site substitution perovskites have great potential to be applied as HDCFC anode materials.
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高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Hao Qiu,Mingzhuang Liang,Jing Zhao,Zhixian Liang,Shanshan Jiang,Huangang Shi,Wei Wang,Huabing Wen,Chao Su
In order to accelerate the widespread application of solid oxide fuel cells (SOFCs), especially proton-conducing solid oxide fuel cells (PCFCs), it is crucial to develop a cathode material with high activity for the oxygen reduction reaction (ORR), excellent long-term stability and CO 2 tolerance. Herein, an A-site deficient cobalt-free (Co-free) perovskite oxide Sr 0.95 Ta 0.1 Fe 0.9 O 3-δ (S 0.95 TF) is prepared by introducing cation deficiencies into SrTa 0.1 Fe 0.9 O 3-δ (STF), and it proves to be a highly active cathode. The increased oxygen vacancies , the decreased thermal expansion coefficient (TEC) value and improved CO 2 tolerance, efficiently enhance electrochemical performance and durability during long-term stability testing. As a result, the area specific resistance (ASR) values of S 0.95 TF at 600 °C are only 0.095 and 0.42 Ω cm 2 with the Sm 0.2 Ce 0.8 O 1.9 (SDC) and BaZr 0.1 Ce 0.7 Y 0.1 Yb 0.1 O 3-δ (BZCYYb) electrolytes, respectively. In addition, both of the single cells with S 0.95 TF cathodes, based on different electrolytes, can function stably for 200 h without obvious performance decrease. These results clearly demonstrate that S 0.95 TF is a highly promising candidate for both oxygen ion-conducting SOFCs and PCFCs.
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高影响因子
ACS Sustainable Chemistry & Engineering
·
2017
·
IF 5.951
Pengtao Qiu,Jinglei Bi,Xiaojing Zhang,Shengchun Yang
We present a novel synthetic strategy for the shape-controlled synthesis of Pt-based alloy nanoparticles (NPs) in inorganic molten salt without using any organic surfactants or capping agents. Graphene oxide (GO) was chosen as the stabilizer in the inorganic molten salt synthetic strategy, due to the existence of various oxygen-containing functional groups on its surface, which adsorb, anchor, and stabilize the metal ions or NPs. After GO was added in molten salt, the PtPd nanosheets were formed on its surface in H2 atmosphere. In addition, when KI was chosen as the shape-inducing agent to selectively adsorb on and fully protect the (100) facets of alloys, PtPd nanocubes with core–shell structure, PtCu nanohemicubes, and PtPdCu nanocubes were prepared successfully on the surface of GO in molten salt. Introduction of GO as the stabilizer in molten salt proves a new approach in synthesis of Pt-based nanocrystals with controlled morphologies.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Cuicui Li,Tongtong Gao,Wanzhen Wu,Xinpu Zhou,Shuyu Zhang,Guangpeng Ma,Xianfeng Guan,Shuang Wang
The development of low-cost membranes with high ion-selectivity is crucial for facilitating the practical application of vanadium redox flow batteries (VRFBs). In this study, sulfonated polybenzimidazole grafted with benzenesulfonic acid side chains was used as the polymer matrix, and fluorine-containing modified MOF-801 (FM) was incorporated to prepare a series of membranes for VRFB applications. The enhancement of proton conductivity and reduction of area resistance can be attributed to several factors: acid-base interactions, the microphase-separated structure of the grafted side chains, the intrinsic conductivity of MOF-801, and the extensive hydrogen-bonding network established through fluoride modification. Notably, the incorporation of fluorine or fluorine-containing groups into the hydrocarbon polymer matrix significantly improves its oxidative stability. The sPBI A5 -FM X membrane, with a FM content of 3 wt%, demonstrated the most remarkable overall performance, achieving a proton conductivity of 33.5 mS cm −1 at 30 °C and 100 % relative humidity (RH). At the same time, it has outstanding oxidation stability and excellent ion selectivity (5.23 × 10 6 S min cm −3 ). In addition, the sPBI A5 -FM 3 membrane exhibited excellent cell performance, with energy efficiency (EE) from 84.80 % to 86.50 % at current densities of 40–120 mA cm −2 . This study confirms the significant potential of fluoride-modified MOF-801 to enhance ion selectivity and provides an effective strategy for optimizing proton transport channels.
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PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Ping Ye,Heng Ding,Bo Yang,Weimiao Wang,Xiaodong Li,Zhiqiang Qiao,Rui Li,Guangcheng Yang,Guoqing Lv
The ignition strategy of energetic materials using low-energy near-infrared (NIR) laser has garnered significant attention due to its enhanced safety and reliability. This study explores the use of a relatively photosensitive but mechanical insensitive energetic material, DATNBI, to facilitate the self-assembly of nano-CL-20 crystals into polycrystalline particles though solvothermal induction, yielding a rough structure conducive to NIR laser ignition. The findings demonstrate that by adjusting the content of DATNBI, it is possible to achieve micro-nano controllable spherical CL-20/DATNBI (C/D) particles, with CL-20 as the primary component and DATNBI as the auxiliary component. The incorporation of DATNBI and the rough surface structure enhance the light absorption of C/D particles in the NIR band. Additionally, the unique synergistic effect between CL-20 and DATNBI during thermal decomposition further promotes NIR laser ignition. As expected, the C/D particles achieved self-sustained combustion and exhibited excellent combustion performance under a 1064 nm laser, which is challenging to be achieved with raw CL-20 or raw DATNBI. Furthermore, the relatively insensitive DATNBI and spherical structure reduced the impact sensitivity of the C/D particles. This multifunctional material strategy, integrating energy, safety, environment-friendliness, and laser ignition performance, offers a novel approach for laser ignition of energetic materials.
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高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2024
·
IF 5.3
Xin Li,Xin Gao,Jun Liu,Junhui Dong,Yubo Wang,Jie Chen,Changzhen Zhan,Yue Yin,Ding Nan
In recent years carbon materials, such as graphene oxide (GO) and carbon nanotube, have been became key materials for high-performance coatings for the protection of metals from corrosion. Here, a novel bi-functional epoxy coating was developed and formulated, which can replace traditional primers and topcoats. Furthermore, the effects of modified graphene oxide‑carbon black (MGC) on the corrosion resistance and weathering resistance of coated Q235 samples have been investigated using salt spray testing, UV accelerated aging testing, and electrochemical impedance spectroscopy. Results suggest that the incorporation of MGC leads to a considerable enhancement in the corrosion resistance and weathering resistance of coated samples. Notably, the bi-functional epoxy coating formulated with 0.2 wt% of MGC demonstrated the most effective anti-corrosion and weathering resistant properties. During the UV accelerated aging testing for 20 days, the low-frequency impedance modulus values of bi-functional epoxy coated samples were recorded to be 1.09 × 10 8 Ω·cm 2 , which is higher than pure epoxy coated samples (9.05 × 10 6 Ω·cm 2 ). Also, the highest adhesion strength of bi-functional epoxy coated samples decreased from 2.51 MPa to 1.97 MPa. These observations suggest that the bi-functional epoxy maintained a significant portion of its adhesion strength even after undergoing UV accelerated aging, indicating its robustness and durability under such corrosion conditions.
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高影响因子
JOURNAL OF CHROMATOGRAPHY A
·
2024
·
IF 3.8
Li-Qin Yu,Rui-Xue Liang,Juan Chen,Sheng-Ming Xie,Bang-Jin Wang,Jun-Hui Zhang,Li-Ming Yuan
Macrocycles play vital roles in supramolecular chemistry and chromatography. 1,1′-Bi-2-naphthol (BINOL)-based chiral polyimine macrocycles are an emerging class of chiral macrocycles that can be constructed by one-step aldehyde-amine condensation of BINOL derivatives with other building blocks. These macrocycles exhibit good characteristics, such as facile preparation, rigid cyclic structures, multiple chiral centers, and defined molecular cavities, that make them good candidates as new chiral recognition materials for chromatographic enantioseparations. In this study, a BINOL-based [2+2] chiral polyimine macrocycle was synthesized by one-step condensation of enantiopure ( S )-2,2′-dihydroxy-[1,1′-binaphthalene]-3,3′-dicarboxaldehyde with (1R,2R)-1,2-diaminocyclohexane. The product was modified with 5-bromo-1-pentene and then attached to thiolated silica using click chemistry to construct a new chiral stationary phase (CSP). The enantioselectivity of the new CSP was explored by separating various racemates under normal phase (NP) and reversed phase (RP) high performance liquid chromatography (HPLC). Thirteen racemates and eight racemates were enantioseparated under the two separation modes, respectively, including chiral alcohols, phenols, esters, ketones, amines, and organic acids. Among them, nine racemates achieved baseline separation under NP-HPLC and seven racemates achieved baseline separation under RP-HPLC. High resolution separation was observed with benzoin ( Rs = 5.10), epinephrine ( Rs = 4.98), 3-benzyloxy-1,2-propanediol ( Rs = 4.42), and 4,4′-dimethylbenzoin ( Rs = 4.52) in NP-HPLC, and with 4-methylbenzhydrol ( Rs = 4.72), benzoin ethyl ether ( Rs = 3.79), 1-phenyl-1-pentanol ( R s = 3.68), and 1-(3-bromophenyl)ethanol ( Rs = 3.60) in RP-HPLC. Interestingly, the CSP complemented Chiralcel OD-H, Chiralpak AD-H, and CYCLOBOND I 2000 RSP columns for resolution of these test racemates, separating several racemic compounds that could not be well separated by the three commercially available columns. The influences of injected sample amount on separation were also evaluated. It was found that the column exhibited excellent stability and reproducibility after hundreds of injections, and the relative standard deviations ( n = 5) of the retention time and resolution were less than 0.49% and 0.69%, respectively. This study indicates that the BINOL-based chiral macrocycle has great potential for HPLC enantioseparation.
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高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Lishun Yang,Fukang Chen,Dezhao Meng,Qin Li,Meng Qi,Xinyu Chen,Kun Yu,Quan Li,Jingang Yang,Chunlin Song,Gang Liu,Lixue Zhang,Li Jin,Yan Yan
In this study, the viscous polymer processing (VPP) technique is implemented to optimize the characteristics of bulk (1- x )BaTiO 3 - x Bi(Mg 0·5 Ti 0.5 )O 3 (BT- x BMT) lead-free relaxor ferroelectric ceramics , with a focus on enhancing the recoverable energy storage density ( W rec ), improving breakdown strength resistance ( E b ), and increasing storage efficiency ( η ). The influence of polyvinyl alcohol (PVA) inclusion in the VPP process on the resulting dielectric ceramics is thoroughly investigated, covering rheological, dielectric, and ferroelectric properties . The results reveal that a gradual increase in PVA quantity during the VPP process effectively improves the density of ceramic blanks. However, an excess of PVA leads to void formation in the ceramic blanks post-debinding, hindering the achievement of a dense structure in the final ceramics and causing performance degradation. The resulting BT-0.405BMT-40 wt% PVA ceramic showed excellent storage performance, with W rec , η , and E b of 6.55 J/cm 3 81.45 %, and 480 kV/cm, respectively. In comparison to bulk BT-0.405BMT ceramics, there is a notable 2.47-fold increase in W rec and a 1.92-fold increase in E b , accompanied by a substantial improvement in η . Moreover, the BT-BMT-40 wt% PVA ceramic exhibits favorable temperature stability (30–150 °C), frequency stability (1–50 Hz), and commendable charge/discharge performance.
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高影响因子
APPLIED THERMAL ENGINEERING
·
2025
·
IF 6.9
Yunfei Li,Min Deng,Fan Chen,Yan Yan Farm,Ade Kurniawan,Peizhong Feng,Nan Sheng,Chunyu Zhu
Phase change materials (PCMs) have been widely applied in thermal energy storage and thermal management due to their high energy storage density, and good temperature stability during phase transitions. To address the critical problems of low thermal conductivity and leakage tendency of organic solid–liquid PCMs, this paper reports a simple, rapid and low energy input route for preparing porous AlN with bi-directional structure by freeze-casting combined with combustion synthesis, which are used as highly thermal conductive skeletons to support paraffin PCM. The highly porous AlN skeletons can avoid the leakage of melted paraffin, and when the AlN mass load was 56.74 wt% in the phase change composite (PCC), the thermal conductivity in horizontal and axial directions reach 15.63 and 11.72 W m −1 K −1 , respectively, which are 78.2 and 58.6 times higher than that of paraffin. Meanwhile, the PCC exhibits a good enthalpy of 82.3 J g −1 , which remains stable after long-term cycles of reversible phase changes. The bi-directional heat transfer enhancement provides the PCC with significant potential for applications in the thermal storage and thermal management.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Xiushuai Guan,Xiaochao Zhang,Changming Zhang,Rui Li,Jianxin Liu,Yunfang Wang,Yawen Wang,Caimei Fan,Zhong Li
Photocatalysis CO 2 reduction into high-value-added chemical feedstocks is desirable for simultaneously addressing the solar energy storage, CO 2 excess and energy shortage issues. In this work, a kind of original S-scheme BiOBr-(0 0 1)/Bi 2 SiO 5 /Bi (OSB) heterostructure photocatalyst with rich oxygen vacancies is in-situ synthesized, which significantly promotes the photocatalytic CO 2 reduction performance. Interestingly, the lower formation energy of oxygen vacancy exhibits the easy feasibility on the BiOBr-(0 0 1) surface via the assistant of ultrasound. There exists the highest photocatalytic CO 2 reduction activity to CO of 234.05 μmol g -1 h −1 for OSB-20 sample (ultrasound time: 20 min), higher 3.3 times than OSB-0 sample (without ultrasound). Combined with experimental and calculated results, the significative formation mechanism, widened light-response range, highly-efficient separation/transfer paths and improved redox-reduction abilities of photogenerated electron-hole pairs for S-scheme OSB-20 heterostructure are investigated and proposed. Our findings provide new insights for the construction and synthesis of the S-scheme Bi-based heterojunction photocatalyst system.
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高影响因子
KEY ENGINEERING MATERIALS
·
2014
·
IF 0
Xin Feng Zhu,Jue Feng,Jun Wu Zhu,Bin Li,Qin Xu
Simultaneous determination of Pb2+ and Co2+ without separation has been successfully achieved by a bicolor quantumn dots mixture. This method takes advantage of the different degrees of the fluorescence quenching effects of Pb2+ and Co2+ to the bio-color quantum dots. Chemometrical approaches were applied to assist the discrimination and detection process. The construction of the multivariate calibration models, based on partial least squares (PLS), orthogonal projections to latent structures least squares (O-PLS) and kenel based orthogonal projections to latent structures (K-OPLS), allowed the simultaneous determination of Pb2+ (in the concentration range of 0-120 mM) and Co2+ (0-300 mM). The optimal number of factors in PLS and the optimal number of orthogonal components in O-PLS and K-OPLS were carefully selected. A comparison of prediction performances between these results was performed by relative prediction errors, square of the correlation coefficient and root mean squares error of prediction.
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CATALYSIS LETTERS
·
2022
·Vol. 153
·期 10
·2927-2935
·
IF 2.936
Ri Chol-Nam,Hwang Kuk-Jin,Kim Tu-Nam,Ro Yong-Hak,Ri Jong-Su
Herein, a novel ternary Bi/Bi 2 WO 6 /amorphous Bi 4 V 2 O 11 heterojunction photocatalyst was first synthesized via a facile one-pot solvothermal approach using ethylene glycol as a reaction medium. In this ternary heterojunction system, highly homogeneous-dispersed metal Bi and Bi 2 WO 6 nanoparticles were supported on amorphous Bi 4 V 2 O 11 flakes. Because of the Surface Plasmon Resonance (SPR) efficiency of metal Bi nanoparticles, as-fabricated Bi/Bi 2 WO 6 /amorphous Bi 4 V 2 O 11 heterojunction photocatalyst exhibited a strong light absorbance capacity in the visible-light and near-infrared light range, which can be verified by UV–vis diffuse reflectance spectra measurements. The Bi/Bi 2 WO 6 /amorphous Bi 4 V 2 O 11 heterojunction photocatalyst showed remarkably enhanced photocatalytic activity toward the photoreduction of heavy metal ion Cr(VI) and the photodegradation of MB under visible-light irradiation. The drastically enhanced photocatalytic activity in the ternary Bi/Bi 2 WO 6 /amorphous Bi 4 V 2 O 11 system could be attributed to the SPR effect of metal Bi and the promoted separation and transport efficiency of photo-induced charge carriers stemming from the construction of ternary heterojunction. Moreover, Bi/Bi 2 WO 6 /amorphous Bi 4 V 2 O 11 heterojunctions exhibited a good cycling stability for Cr(VI) reduction after 5 cycles. This study may be supply new insight into the fabrication of highly efficient and stable Bi 4 V 2 O 11 -based photocatalysts, and it is expected to have certain theoretical and experimental value in the design and exploitation of novel heterojunction photocatalyst. Graphical Abstract
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高影响因子
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