Materials Today Communications
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2024
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IF 3.7
Xianze Meng,Qianru Zhang,Xuantong Lv,Jiabo Chen,Yingzi Peng,Pengxuan Dong,Qingqing Sun
The corrosion inhibition performance of three amino acids, namely L-Phenylalanine (Phe), L-Methionine (Met) and L-Histidine (His) on 7150 Al alloy in 0.1 M HCl + 1 M NaCl solution was investigated by using electrochemical impedance spectroscopy (EIS), cyclic polarization, DFT and MD simulations. Electrochemical results indicate that all the studied amino acid inhibitors are cathodic type, and the inhibition efficiency follows the following order under all studied temperatures (25, 35 and 45 ℃): His > Met > Phe. A strong correlation between corrosion inhibition efficiency and DFT parameters is not evident, but the adsorption sites (N and O of NH 2 -COOH-, S atom of Met and two N atoms in the imidazolyl ring of His) can be determined by Fukui indices and Mulliken charges of the local atoms. In addition, MD simulations indicate that corrosion inhibition efficiency increases with the decreasing of adsorption energy.
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Journal of Energy Chemistry
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2024
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IF 14
Xuena Ma,Zhangxin Xu,Mingyang Liu,Panzhe Qiao,Qi Li,Ruihong Wang,Baojiang Jiang
Electronic-state modulation strategy offers great potential in designing RuO 2 -based bifunctional-electrocatalysts for rechargeable Zn-air batteries (ZABs). Various three-dimensional (3D) transition metal oxides are attempted to couple with RuO 2 for constructing an appropriate Ru O M interface. This work aims to construct Co 3 O 4 -RuO 2 heterostructures on carbon sheets (Co 3 O 4 /RuO 2 /NCNS) for boosting electronic transfer and regulation. Experiments and theoretical calculations identify the electronic transfer from Co 3 O 4 to RuO 2 that modulates the electronic structure of metal surfaces/interfaces. Specifically, it leads to the increase in Co 3+ content, electron-rich state at RuO 2 surface and electronic accumulation at interfaces. Moreover, this electronic-state modulation optimizes the d-band center in Co 3 O 4 /RuO 2 that lowers the reaction barriers and endows interfaces as the biggest contributor to oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) performance. The Co 3 O 4 /RuO 2 /NCNS shows a quite low potential difference of 0.62 V and remarkable durability for ORR/OER. Co 3 O 4 /RuO 2 /NCNS-assembled ZABs exhibit an excellent specific capacity of 818.3 mA h g −1 and a superior lifespan over 750 h.
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RSC Advances
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2024
·Vol. 14
·期 12
·8204-8213
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IF 3.9
Fangli Li,Ziqin Huang,Changjiang Liu,Meini Yang,Jixiang Wu,Wenhui Rao,Chuanbai Yu
Currently, additively efficient flame retardants are being developed to enhance the smoke suppression, flame retardancy, and thermal properties of composite materials. To this end, the current study designed and prepared a novel P/N/Si/Zn-containing organic–inorganic hybrid denoted as APHZ. Its inorganic part was 2-methylimidazole zinc salt (ZIF-8), which improved its smoke suppression and catalytic carbonization. The organic part (P/N/Si-containing compound) promoted its flame retardancy and interfacial compatibility between APHZ and epoxy resin (EP). The test results revealed that EP/APHZ-3 composites achieved a V-0 rating and a notable LOI value of 30.7% when introducing 3 wt% APHZ into the EP matrix. Cone calorimetry tests (CCT) further demonstrated that the average heat release rate (av-HRR), total smoke production (TSP), and CO production (COP) of EP/APHZ-3 were reduced by 23.3%, 14.0%, and 21.1%, respectively. Meanwhile, the char residual was increased by 60.6%, as compared to pure EP. Furthermore, the flame-retardant mechanism of EP/APHZ composites was investigated by the XPS, TG-FTIR, and Raman spectroscopy techniques. The observed synergistic effect of the imidazole skeleton ZIF-8 and P/N/Si-containing compound in APHZ facilitated the generation of a dense multi-element char layer, with the condensed phase flame-retardant mechanism playing a dominant role. These findings contribute to developing and designing high-performance flame-retardant EP.
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PubMed
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JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Ahmed Zaki Alhakemy,Genxiang Wang,Kai Chen,Ahmed E. Hassan,Zhenhai Wen
Sluggish oxygen reduction reaction (ORR) kinetics limit the development of metal-air batteries and fuel cells, hindering overall energy conversion efficiency. Therefore, significant research has focused on cost-effective, highly active, and exceptionally stable non-precious metal ORR electrocatalysts. This study presents the synthesis of a nanohybrid material called Fe SAs/FN-CNs. It is made up of single iron atoms embedded in ultrathin porous carbon nanosheets that are co-doped with F and N. The synthesis process involves an easy one-step pyrolysis technique without additional post-treatment. The Fe SAs/FN-CNs material is designed to function as an effective zinc-air battery ORR electrocatalyst. Based on their distinctive components and structure, the optimal Fe SAs/FN-CNs exhibit outstanding catalytic efficiency and long-lasting performance in the alkaline ORR. They have an onset potential (E onset ) of 0.95 V, a half-wave potential (E 0.5 ) of 0.85 V, a kinetic current density (J K ) of 20.49 mA cm −2 at 0.8 V, and a diffusion-limited current (J d ) of 6.2 mA cm −2 . In addition, a Zn-air battery made using homemade Fe SAs/FN-CNs demonstrated a power density of 197 mW cm −2 , a specific capacitance of 813.5 mAh g −1 , and exceptional stability. It outperformed the commercial Pt/C by operating continuously for over 147 hours at 10 mA/cm² (discharge-charge). The Fe SAs/FN-CNs nanohybrid electrocatalyst shows great potential as an electrocatalyst for various metal-air batteries.
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JOURNAL OF MOLECULAR STRUCTURE
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2024
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IF 4
Yan Fan,Bo Hou,Dongcheng Hu
In this work, a novel Zn(II) coordination polymer (denoted as Zn-CP) was constructed by the mixed ligands of 6-(3′,4′-Dicarboxy phenoxy)isophthalic acid (H 4 L) and 4,4′-bis(imidazolyl)biphenyl (bib) under solvothermal method. And based on the Zn-CP, the surfactant agent sodium dodecyl sulfate (SDS) was further introduced into the structure, thus obtaining the Zn-CP(S) which possessed the same phase but a smaller size compared with the Zn-CP. Interestingly, the Zn-CP(S) presented a significantly ameliorated fluorescent intensity, about 4.36 times higher than that of the Zn-CP prepared in the absence of SDS. Taking advantage of the improved fluorescence trait of the Zn-CP(S), a fluorescence recognition towards hazardous matters was further carried out. The results showed that Zn-CP(S) could simultaneously recognized for Hg 2+ , Cr 2 O 7 2− and a broad range of hazard nitroaromatic explosives with the satisfactory limits of detection (LODs). In addition, Zn-CP could also be used as a recyclable adsorbent to remove methyl orange (MO) in aqueous medium. The maximum equilibrium adsorption capacity of Zn-CP for MO was 61.01 mg/g, and the adsorption mechanism could be attributed to the weak inter-molecular interaction involved π-π stacking and hydrogen bonding between Zn-CP and the MO molecule. Therefore, the bifunctional material has potential application prospects in fluorescence recognition and adsorption.
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ACS Applied Materials & Interfaces
·
2025
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IF 8.2
Linyu Xiao,Jifei Sun,Mingming Wang,Shenxiang Zhang,Yan Xu
The solid-electrolyte interphase (SEI) strongly determines the stability and reversibility of aqueous Zn-ion batteries (AZIBs). In traditional electrolytes, the nonuniform SEI layer induced by severe parasitic reactions, such as the hydrogen evolution reaction (HER), will exacerbate the side reactions on Zn anodes, thus leading to low zinc utilization ratios (ZURs). Herein, we propose to use methoxy ethylamine (MOEA) as a nucleophilic additive, which has a stronger nucleophilic characteristic than water, with the advantage of an abundance of nucleophilic atoms. The Helmholtz plane (HP) on the Zn anode can be manipulated via the adsorption of MOEA, which excludes free water from the HP due to its strong affinity with metallic Zn. Benefiting from the optimization of the HP, side reactions are greatly suppressed, and a smooth SEI layer can be constructed, enabling the Zn anode to work at high ZURs and high areal capacities. Consequently, the Zn||Cu asymmetric cell exhibits an extremely high cumulative plating capacity of 4 Ah cm–2 at 10 mA cm–2 with an average Coulombic efficiency (CE) of 99.8%. The Zn||Zn symmetric cell achieves a maximum ZUR of 80% at an areal capacity of 20 mAh cm–2 for 130 h, accounting for the boosted reversibility of Zn||V2O5 and Zn||AC full cells under low N/P ratios. Our strategy with nucleophilic electrolyte additives opens a path for developing durable aqueous Zn batteries with high ZURs.
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CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Yusha Huang,Longcheng Gong,Chengli Xie,Wenling Qin,Min Wang,Lianzhe Hu,Zhining Xia
Herein, a biomimetic approach is developed to improve the phosphatase-like catalytic activity of a metal–organic framework (MOF) nanozyme. Specifically, biomimetic Zn sites, featuring a coordination environment similar to that of natural phosphatase, were covalently anchored into UiO-66-NH 2 nanozyme through a step-by-step modification process. Compared with pristine UiO-66-NH 2 , the resultant 66-IS-Zn exhibited a 130-fold increase in K cat . Mechanism studies suggest that the anchoring of Zn sites can only enhance the catalytic performance of MOFs that possess intrinsic phosphatase-like activity, and the enhancement of catalytic activity strongly relies on the coordination environment of Zn sites, which involves the co-coordination of N and O with Zn. Besides the excellent phosphatase-like activity, 66-IS-Zn also exhibited enhanced intrinsic fluorescence emission and high phosphodiesterase-like catalytic activity. Consequently, 66-IS-Zn was used as the sensing unit to construct a three-channel sensor array for distinguishing organophosphorus pesticides (OPs). This sensor array can successfully distinguish six OPs and allow the quantification of profenofos and phoxim. Moreover, the binary mixtures of OPs and cherry tomato samples were precisely discriminated without any overlapping, indicating the reliability and practicability of the sensor array.
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Inorganic Chemistry Frontiers
·
2025
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IF 6.4
Qingsong Cai,Zhenyu Guan,Yue Hu,Jianmin Zhang,Kai Zhang,Zongmin Zheng
Zinc metal is an excellent anode material due to its high theoretical capacity, low cost, good safety, and many other advantages. However, uncontrollable side reactions and dendrite growth remain significant challenges in developing aqueous zinc-ion batteries (ZIBs). Building artificial coatings is one of the most effective strategies for addressing these problems. Herein, porous layered basic zinc acetate nanosheets (LBZA) were innovatively constructed to protect zinc anodes (LBZA@Zn) against uncontrollable side reactions and dendrite growth in aqueous ZIBs. The hydrophobic and positively charged surface eventually constructs a local high-concentration region, thereby facilitating the dissociation and transport of Zn2+, as well as reducing the hydrogen evolution reaction and the by-product growth of the Zn anode. The LBZA@Zn∥LBZA@Zn symmetrical cell has a cycling stability of 1800 h at 2 mA cm−2 and 1 mA h cm−2. While the LBZA@Zn∥Cu cell maintains stable deposition of Zn2+ after 5000 cycles at 1 mA cm−2 and 0.5 mA h cm−2, with a high average coulombic efficiency of 99.91%. These findings provide new ideas for the construction of efficient artificial coatings.
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CHINESE JOURNAL OF CATALYSIS
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2024
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IF 15.7
Yibo Guo,Yuanyuan Xue,Zhen Zhou
The sluggish kinetics of the oxygen reduction reaction (ORR) and the oxygen evolution reaction (OER) pose significant challenges for the viability of rechargeable Zn-air batteries. Developing efficient, cost-effective, stable, and dual-purpose oxygen electrocatalysts remains a formidable hurdle. In this study, we successfully synthesized a highly promising chainmail catalyst named FeNi@NC, comprising ultrathin carbon shells encapsulating FeNi alloy nanoparticles on N-doped graphene-like nanosheets . The strong synergistic effects between FeNi alloys and N-doped carbon shells result in outstanding bifunctional catalytic activity, particularly in alkaline media. Consequently, Zn-air batteries incorporating FeNi@NC as the catalyst demonstrate exceptional performance, operating reliably at high power density with extended lifespan. Furthermore, computational analyses provided further confirmation of the catalytic activity and revealed that the electron transfer from FeNi alloy nanoparticles to the carbon shells activates the carbon surface , leading to enhanced catalytic performance. This research not only sheds light on the rational design and synthesis of heteroatom-doped carbon materials supporting the growth-constrained transition metal alloys but also offers a practical solution for advancing the application of Zn-air batteries.
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CHEMICAL ENGINEERING JOURNAL
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2024
·
IF 13.3
Bao-Hong Xu,Yi-Han Song,Guo-Duo Yang,Jia-Yu Zhang,Yu-Qi Liu,Jie-Qiong Liu,Qi-Meng Zhang,Xing-Long Wu,Ming-Xiao Deng,Hai-Zhu Sun
As one of the most important cathode materials for aqueous zinc-ion batteries (AZIBs), polyaniline (PANI) has attracted much attention because of its high electrical conductivity, simple synthesis procedure and excellent redox reversibility. However, the morphology of PANI macromolecules and its spontaneous deprotonation properties lead to low capacity and poor cycle stability, which limits its further application. To address these issues, in this work, PANI is in-situ prepared on the surface of carbon cloth (CC) through chemical oxidation polymerization under the presence of carbonized polymer dots (CPDs). Compared with pure PANI cathode electrodes, the materials with appropriate amount of CPDs (CPDs/PANI@CC-10) show a high specific discharge capacity of 168 mAh g −1 at 0.1 A g −1 . Even at a high current density of 10 A g −1 , CPDs/PANI@CC-10 still exhibits a capacity of 102 mAh g −1 , and maintains 94.3 % of the capacity after 10,000 cycles. The profound mechanism investigation reveals that during the charge/discharge cycles, the percentage of protonated N greatly increases due to the addition of CPDs, and new N Zn O bonds are formed, which is beneficial to more stable cycle and larger amount of Zn 2+ storage. This work provides a new route for control the morphology and structure of PANI, which is of significant for its practical application in AZIBs.
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CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Han Xu,Gangsong Huang,Wenting Zhou,Xuan Miao,Hongjun Ji,Mingyu Li,Yufeng Li
In the realm of electronic packaging advancements, the utilization of metal to ceramic joints has garnered significant attention. This manuscript details the development of a specific glass solder with excellent wettability and a thermal expansion coefficient of 8.1 × 10 −6 °C −1 , comprising 35Bi 2 O 3 -30B 2 O 3 -15ZnO-20SiO 2 (mol.%). This design achieves reliable connection of the Al 2 O 3 ceramics and Kovar alloy in an atmospheric environment. The interface reaction between the glass solder, Al 2 O 3 ceramics, and oxidized Kovar alloy resulted in the formation of ZnAl 2 O 4 particles and Bi spheres at the joints. The enhancement in joint shear strength was primarily attributed to the nanoscale, dispersed ZnAl 2 O 4 particles. However, the presence of microscale Bi spheres, with a lower elastic modulus than the glass solder, initiated cracks during shear deformation, thereby compromising the integrity of the joint. Optimization of brazing temperatures enabled control over the ZnAl 2 O 4 and Bi sphere phases within the joints, yielding a peak shear strength of 51.7 ± 8.9 MPa at 650 °C. This study highlights the achievement of high-performance metal-ceramic bonding through tailored interface reactions and optimized joint microstructures.
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ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Hao Guo,Dinghao Zheng,Zhenjie Hao,Yuze Wang,Ruiqi Huang,Yaohong Huang,Ruixia Zhong,Liang Dong,Rui Zhu,Jianbing Zang,Pengfei Li,Jinsheng Li
The development of sustainable energy technologies depends critically on the search for effective, reasonably priced catalysts for the oxygen reduction reaction (ORR) and high-capacitance supercapacitors. This study introduces a novel iron and zinc co-doped porous carbon nanofiber catalyst (Fe/Zn-N-C-900), fabricated through an innovative electrospinning technique, which is mainly improved by adding β-cyclodextrin (β-CD) and zinc chloride (ZnCl 2 ) to the spinning solution. The β-CD can reduce the nanofiber diameter, together with zinc chloride, creates a rich hierarchical pore structure. With an onset potential of 0.97 V in alkaline and 0.79 V in acidic media, the resultant Fe/Zn-N-C-900 catalyst exhibits remarkable ORR activity and an impressive specific surface area of 1075.39 m 2 ·g -1 . With an energy density of 38.34 Wh·kg -1 , it maintains 98 % of its capacitance after 5000 charge-discharge cycles and reaches a specific capacitance of 332 F·g -1 at 1 A·g -1 in supercapacitor tests. The exceptional performance is attributed to the high surface area, hierarchical porous structure, and synergistic effects of iron and zinc co-doping, according to combined characterization and density functional theory calculations.
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