ADVANCED FUNCTIONAL MATERIALS
·
2022
·Vol. 32
·期 48
·2209743
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IF 19.924
Yi-Xuan Li,Jing Li,Dunru Zhu,Ju-Zheng Wang,Guo-Fang Shu,Junji Li,Sheng-Li Zhang,Xue-Ji Zhang,Serge Cosnier,Hai-Bo Zeng,Dan Shan
High electrocatalytic activity with tunable luminescence is crucial for the development of electrochemiluminescence (ECL) luminophores. In this study, a porphyrin-based heterobimetallic 2D metal organic framework (MOF), [(ZnTCPP)Co 2 (MeIm)] (1), is successfully self-assembled from the zinc(II) tetrakis(4-carboxyphenyl)porphine (ZnTCPP) linker and cobalt(II) ions in the presence of 2-methylimidazole (MeIm) by a facile one-pot reaction in methanol at room temperature. On the basis of the experimental results and the theoretical calculations, the MOF 1 contains paddle–wheel [Co 2 (-CO 2 ) 4 ] secondary building units (SBUs) axially coordinated by a MeIm ligand, which is very beneficial to the electron transfer between the Co(II) ions and oxygen. Combining the photosensitizers ZnTCPP and the electroactive [Co 2 (-CO 2 ) 4 ] SBUs, the 2D MOF 1 possesses an excellent ECL performance, and can be used as a novel ECL probe for rapid nonamplified detection of the RdRp gene of SARS-CoV-2 with an extremely low limit of detection (≈30 aM).
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高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2022
·
IF 3.841
Yingling Zhong,Yuandong Wu,Dajiang Mei,Shaoguo Wen,Thomas Doert
Three 1,10-phenantroline zinc halide complexes were successfully synthesized under solvothermal method and structurally characterized by single-crystal X-ray diffraction analysis. The three title complexes Zn(1,10-phen)I 2 ( 1 ), Zn(1,10-phen) 2 I 2 ( 2 ) and Zn 2 (1,10-phen) 2 C 2 O 4 Br 2 ( 3 ), crystallize in the triclinic space group P 1 ¯ (No.2) with different unit cell parameters, are isolated neutral molecules. The extra stretching force from another 1,10-phen ligand in 2 lead to the Zn−N bond lengths longer than the corresponding in 1 . Meanwhile, the molecules of Zn(1,10-phen)I 2 and Zn(1,10-phen) 2 I 2 further connect each other via the π-π interactions between the adjacent phenanthrolines to form a pseudo-two-dimensional layer which parallel to b-axis. Their face-to-face distance of π-π stacking interactions between the adjoining 1,10-phen rings is 3.7264 Å and 3.4435 Å, respectively. The zinc bromide complex 3 contains C−H···O intramolecular and C−H···Br (2-D) interlayer hydrogen bonding, which contributed to the connection between the parallel zig-zag molecules. The distance of phenanthroline rings in intramolecular and interlayer is 2.6071 Å and 3.8125 Å. The luminescent emissions of free ligand 1,10-phen and its zinc halide complexes were measured in various solvents. These zinc halide complexes show the obvious luminescent phenomenon with grass-green, yellow-green and light yellow in Dimethyl sulfoxide (DMSO), respectively (the maximum emission wavelength is 530 nm, 539 nm and 496 nm). The maximum emission wavelength for 2 has a little red-shifted compared with 1 . It can be concluded that the number of ligand and the electron density on coordinated Zn atoms influence the emission wavelength through charge transfer from ligand to the metal. The emission wavelengths of 3 are also slightly red-shifted compared with the free 1,10-phen ligand, which is attributed to the coordination effects of the 1,10-phen ligands to the Zn cations and [C 2 O 4 ] 2− group.
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高影响因子
ACS Sustainable Chemistry & Engineering
·
2022
·
IF 9.224
Yuewen Shao,Kai Sun,Mengjiao Fan,Guoming Gao,Junzhe Wang,Lijun Zhang,Shu Zhang,Xun Hu
Copper-based catalysts are active for hydrogenation, while they are prone to sintering in hydrothermal conditions. In this study, alloying Cu with Ni and Zn was adopted to suppress sintering of copper species in the catalyzed conversion of furfural to cyclopentanone (CPO) and cyclopentanol (CPL) in the aqueous phase. The results indicated that Zn acted as a “glue” for aiding the formation of CuZn or CuNiZn alloy. The formation of the ternary CuNiZn alloy in CuNiZn/Al2O3 catalyst created the developed porous structure, induced the formation of abundant Lewis acidic sites and Brønsted acidic sites, and enhanced the dispersion and the total surface area of Cu species. These together rendered CuNiZn/Al2O3 with superior activity to monometallic or bimetallic Cu-based catalysts for the production of CPO and CPL (sum yield of 86% over Cu1.0Ni1.0Zn1.0/Al2O3), which was attributed to the synergy between CuNiZn alloy and Brønsted acidic sites. Alloying Ni with Cu and Zn weakened the adsorption of the C═C bond in the furan ring of furfural, while enhancing the activation of C═O and C–O–C bonds in furfural, avoiding the deep hydrogenation of the furan ring, facilitating the rearrangement of furfuryl alcohol to CPO, and improving the turnover frequency for the production of CPO from furfural remarkably (1011.3 h–1 over Cu1.0Ni1.0Zn1.0/Al2O3 vs 23.9 h–1 over Cu1.0/Al2O3). The formation of ternary CuNiZn alloy could not only suppress the sintering of metallic Cu species during the reduction in hydrogen but also effectively prevent the aggregation of Cu species in the aqueous phase, enhancing the catalytic stability under hydrothermal conditions.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Longlong Liu,Zunpeng Hu,Minghui Wang,Jinliang Ma,Zihao Chen,Xin Ning,Ding Yuan
The construction of a hybrid hierarchical architecture is a promising strategy for optimizing the electrocatalytic activity and the performance of flexible Zn-air battery. However, it still remains a challenging task. This study reports on the use of a simple approach in the preparation of a flexible 3D self-supporting bifunctional catalyst. Ultrathin NiFe-based layered double hydroxide nanosheets (NiFe-LDH) have in this approach been strongly coupled to a metal-organic framework (MOF)-derived carbon nanoflake array, to be used in flexible Zn-air batteries. Importantly, the introduction of Co nanoparticles that were anchored onto the nitrogen-doped porous carbon (Co-NC) nanoflakes provided an abundance of active sites for the oxygen reduction reaction (ORR). Moreover, the catalytic oxygen evolution reaction (OER) process was improved by altering the local electronic structure of the Ni and Fe species in NiFe-LDH. The 3D interconnected conductive network structure, in addition to the strong coupling between NiFe-LDH and Co-NC, was found to give a catalyst with superior electrocatalytic OER performances. The overpotential was only 284 mV at 50 mA cm −2 in an alkaline medium, which is a result that outperforms the commercial RuO 2 catalyst. This bifunctional catalyst did also exhibit a good catalytic performance that is comparable to that of commercial Pt/C towards ORR. Interestingly, when this catalyst was used as binder-free air cathode, the assembled flexible solid-state Zn-air battery demonstrated a favorable power density, cycling stability, and mechanical flexibility. The present work offers a facile and efficient strategy for the development and construction of self-supporting bifunctional OER/ORR electrocatalysts , to be used in wearable and flexible electronic devices.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Wenwen Wang,Yutang Kang,Canyu Cui,Xinyan Lv,Zisheng Wang,Boran Wang,Yumei Tan,Shihui Jiao,Guangsheng Pang
A hierarchical micro/nanostructure has been successfully fabricated, which is constructed by anchoring polyethersulfone (PES) nanoparticles on Zn-Ni-Co layered double hydroxide (LDH) nanowires with stainless steel mesh as supporter (PES/PDA@ZNCNW-SSM). The PES/PDA@ZNCNW-SSM shows excellent underliquid dual superlyophobicity with underwater tetrachloroethylene contact angle and under n-hexane water contact angle of 166.7° and 166.8°, respectively. The underliquid dual lyophobic PES and microporous structure formed by Zn-Ni-Co LDH nanowires synergistically contribute to the underliquid dual superlyophobic surface, which is beneficial for effective and controllable organic liquid/water separation. After 10 cycles of alternate separation, the separation efficiencies of PES/PDA@ZNCNW-SSM are above 99.9% and 99.4% for water-in-tetrachloroethylene and tetrachloroethylene-in-water emulsions, respectively. The underliquid dual superlyophobicity can also be obtained with carbon cloth, non-woven fabric, Ni foam and filter paper as supporter and the corresponding membranes can be used to efficiently separate organic liquid/water mixtures on-demand. These results confirm that the hierarchical micro/nanostructure anchored with underliquid dual lyophobic PES nanoparticles is an effective route for the preparation of underliquid dual superlyophobic materials.
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Journal of Materials Chemistry A
·
2023
·Vol. 11
·期 31
·16889-16899
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IF 11.9
Xuena Ma,Mingyang Liu,Qi Li,Xudong Xiao,Jianan Liu,Xiaoqin Xu,Yihang Yin,Panzhe Qiao,Luoming Zhang,Xiaoyan Zou,Ruihong Wang,Baojiang Jiang
For developing rechargeable zinc–air batteries (ZABs), designing reasonably high-activity and robust endurance electrocatalysts toward oxygen evolution/reduction reactions (OER/ORR) is of paramount importance. Single-atom catalysts (SACs) have been considered as ideal candidates for driving oxygen electrocatalysis in ZABs owing to their high electrocatalytic activity and atom utilization. However, oxidation and aggregation hinder their practical application. To address this issue, Co single atom-decorated RuO2 nanoparticles loaded on nitrogen-doped ultrathin porous carbon nanosheets (designated as CoSA-RuO2-NUCN) were synthesized. We provide an effective method for stabilizing cobalt atom with ruthenium dioxide; the strong interfacial interaction between CoSA-RuO2 makes the Co–O–Ru interface extremely stable in the electrocatalytic oxidation reaction. Meanwhile, CoSA-RuO2 combines with ultrathin carbon nanosheets to enhance the conductivity. Consequently, the obtained CoSA-RuO2-NUCN exhibits outstanding performance toward ORR (half-wave potential of 0.90 V) and OER (280 mV at 10 mA cm−2), respectively. Moreover, the rechargeable ZAB with CoSA-RuO2-NUCN shows high open-circuit voltage (1.55 V), ultrahigh specific capacity (766.14 mA h g−1), and superb long-term cycling stability (800 h), outperforming the commercial Pt/C + RuO2. This study not only presents a method to obtain a high-activity and strong stability electrocatalyst but also encourages to explore advanced materials to promote the development of ZABs.
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高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Yang Xiang,Chuanlan Xu,Tiantian Fu,Yibo Tang,Guijun Li,Zhongping Xiong,Chaozhong Guo,Yujun Si
A strategy is reported to synthesize a nitrogen-doped carbon catalyst (NiFe-Mi-C-Gr), in which carbon black particles are coated by the carbonized product of 2-methylimidazole, favoring the exposure of ORR active sites. Iron oxides are preferentially generated as OER active sites in the catalyst with the regulation of graphene. The NiFe-Mi-C-Gr demonstrates 0.854 V of ORR half-wave potential in 0.1 M KOH, 3.94 ∼ 3.98 of ORR electron transfer numbers, and also exhibits remarkable OER catalytic activity with 1.535 V of potential at 10 mA cm −2 , showing the high bifunctional catalytic activity. The Zn-air battery assembled with NiFe-Mi-C-Gr can stably work at ∼ 1.05 V of discharge voltage and ∼ 2.02 V of recharge voltage at 10 mA cm −2 , deliver 111 mW cm −2 of maximum power density and 809 mAh g −1 of specific capacity, along with superior cycling rechargeability and long-term durability, outperforming NiFe-Mi-C (without graphene) and the benchmark catalyst Pt/C and RuO 2 .
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2026
·
IF 9.2
Dong-Chu Lu,Juan Xie,Yuan Gao,Cheng-Xin Li,Shan-Lin Zhang
The TEC of BFZYZ is lower to 13.8 × 10 −6 1/K, matching well with the electrolyte. • Y and Zn co-doping enhances hydration ability and surface oxygen vacancies. • BFZYZ yields an R p of 0.26 Ω cm 2 at 600 °C, 50% lower than that of BFZ. • PCFC with BFZYZ electrode achieved peak power density of 0.8 W/cm 2 at 600 °C. • The cell with BFZYZ electrode operates stably for 500 h. Developing active and durable oxygen electrodes for both oxygen reduction and oxygen evolution reactions at low temperatures remains a major challenge for proton ceramic electrochemical cells (PCECs). Herein, a cobalt-free Y and Zn co-doped Ba(Fe,Zr)O 3−δ perovskite (BFZYZ) is developed as a PCEC oxygen electrode, integrating excellent electrochemical performance and durability. At 600 °C, Y and Zn co-doping reduces the polarization resistance by 50%, mainly owing to enhanced hydration capability and surface oxygen exchange, which accelerate ORR/OER kinetics. Meanwhile, BFZYZ shows a lower average thermal expansion coefficient of 13.8 × 10 −6 1/K over 30–600 °C, improving its thermal compatibility with the electrolyte. The PCEC with BFZYZ electrode achieves a peak power density of 0.8 W/cm 2 in fuel cell mode and a current density of 0.82 A/cm 2 at 1.3 V in steam electrolysis mode at 600 °C, with stable operation, demonstrating the potential of BFZYZ for high-performance and durable PCECs.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Hui Peng,Xin Wang,Fan Yang,Zhiyuan Liu,Haikuo Lei,Shuzhen Cui,Xuan Xie,Guofu Ma
The side reactions of dendrites growth and hydrogen evolution occur inevitably in the aqueous system of Zn anode, which is the fundamental culprits cause of the limited lifespan and Coulomb efficiency (CE) of Zn-based energy storage devices. Herein, for weakening and reconstruction of the solvated structure of hydrated Zn 2+ and promote parallel Zn deposition, a cost-effective and green D-trehalose dihydrate (DT) additive is proposed to stabilize the Zn anode by adding it to the aqueous ZnSO 4 electrolyte. The results of experiment and theoretical calculation proved that DT additive can effectively disrupt the original Zn 2+ solvated sheaths and reconstruct hydrogen bond networks in the ZnSO 4 electrolyte, thereby increasing the decomposition potential of H 2 O molecules and induced (0 0 2) crystal plane to form horizontally ordered and densely stacked Zn deposition, leading to significantly reducing the generation of sharp dendrites during the Zn plating and stripping process. In this way, the Zn anodes in optimized ZnSO 4 + DT electrolyte exhibit enhanced the cycling stability with lifespan over 650 h and high CE of 99%, which is nearly 10 times more stable than that in pure ZnSO 4 electrolyte. Moreover, Zn-ion hybrid capacitors (ZICs) assembled with ZnSO 4 + DT electrolyte and N, P co-doped hard carbon (NPHC) as cathode exhibits a high discharge capacity of 123.5 mAh/g at 0.1 A/g and superior capacity retention (over 90% after ultra-long 20,000 cycles at 5 A/g), along with about 100% CE.
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高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2021
·
IF 3.498
Muge Shele,Fei-Yan Qi,Xin-Yu Tian,Yong-Sheng Bao,Menghe Baiyin
Three organic-decorated quaternary TM-Cd-Sb-Se (TM = Zn, Mn, Fe) compounds were prepared under tris (2-aminoethyl) amine conditions by solvent method, namely, [Zn(tren)] 2 CdSb 2 Se 6 ( 1 ), [Mn(tren)]CdSb 2 Se 5 ( 2 ) and [Fe(tren)]Cd 2 SbSe 5 ( 3 ) [tren = tris (2-aminoethyl) amine)]. The single-crystal X-ray diffraction analyses showed that the three compounds structures were 0-D {[Zn(tren)] 2 CdSb 2 Se 6 } ( 1 ) cluster, 1-D {[Mn(tren)]CdSb 2 Se 5 } ( 2 ) ribbon and 2-D {[Fe(tren)]Cd 2 SbSe 5 } ( 3 ) layered. A series of characterizations of these compounds were performed, as estimated from the adsorption spectra, the band gaps of 1 , 2 and 3 are 2.09, 1.78 and 1.91eV, respectively. Photoluminescence experiments show that compounds 2 and 3 exhibit luminescent properties. And the thermal stability of these compounds was tested by thermogravimetric and differential scanning calorimetry .
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高影响因子
JOURNAL OF POWER SOURCES
·
2019
·
IF 7.467
Xiao Zeng,Zhanhong Yang,Jinlei Meng,Linlin Chen,Hongzhe Chen,Haigang Qin
The porous ZnO/C composites derived from metal organic framework-5 (MOF-5) is obtained via a calcination method subsequent to hydrothermal process. The results of materials characterization analysis show that the porous ZnO/C composites is well-crystallized with cube morphology and possesses a large specific surface area. According to the electrochemical measurements, the porous ZnO/C composites as anodic materials for Nickel–Zinc rechargeable battery exhibits excellent electrochemical performance compared with that of the commercial ZnO, keeping the discharge specific capacity at 587 mAh g −1 with the capacity retention ratio of about 89.1% after 800 cycles. The outstanding electrochemical property of porous ZnO/C composites can be ascribed to the interconnected conductive network generated by the carbon layer and stable cube architectures derived from metal organic framework-5 precursor, which can facilitate the transportation of electrons and restrain the formation of zinc dendrites during repeated charge-discharge cycling. Furthermore, a novel sphere structure consisting of numerous intersecting disk-like sheets is transformed from the cubic porous ZnO/C composites after 600 cycles, which can contribute to the uniform current distribution and improve the performance of energy storage, revealing the truth for the long cycle life of porous ZnO/C composites.
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高影响因子
TRANSITION METAL CHEMISTRY
·
2015
·Vol. 40
·期 7
·769-777
·
IF 1.306
Wang Hu,Zhang Xiao-Yin,Bi Cai-Feng,Fan Yu-Hua,Meng Xiang-Min
Abstract Three complexes, Zn(C 40 H 36 N 4 O 8 )·3CH 3 OH ( 1 ), Ni(C 40 H 36 N 4 O 8 )·3CH 3 OH ( 2 ) and Co(C 40 H 36 N 4 O 8 )·3CH 3 OH ( 3 ), with a sexidentate (N 2 O 4 ) symmetric bis-Schiff base ligand (C 40 H 36 N 4 O 8 = 1,2-bis(2-methoxy-6-formylphenoxy)ethane- l -tryptophan) have been synthesized and characterized by physicochemical and spectroscopic methods. The X-ray crystal structures show that the metal atoms of three complexes are all six-coordinated by two nitrogens from C=N groups, two oxygens from ether groups and two carboxylic oxygens in the mono-ligand, forming a distorted octahedral geometry. The complexes were screened as photocatalysts for the degradation of methylene blue, rhodamine B and methyl violet. All three complexes proved to be good candidates for the photocatalytic degradation of methylene blue and complexes 2–3 are also good photocatalysts for the degradation of rhodamine B. The mechanism of these photocatalytic degradations is discussed. Graphical Abstract The main characterization and photocatalytic experiment of three complexes.
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高影响因子
危险品化学品经营许可证（带存储）