Nano Research
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2024
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IF 9.5
Zhang Donghao,Si Lianxi,Ren Qianqian,Yan Xintong,Hu Shi
Pd-based catalysts exhibit higher catalytic activity and durability in many electrochemical reactions. However, the electrochemical performance can be further enhanced by fine-tune of the alloy composition. Although binary alloys have been fully studied, the multicomponent alloys are far beyond understanding, which leaves cocktail effect a compromised explanation for the high-entropy alloy. Herein Pd nanosheet-seeded growth was used to synthesize a Pd-Zn-Cd ternary alloy by accurately controlling the Pd-Zn-Cd molar ratio through adjusting the amount of introduced Cd precursor. Through analysis of the crystal phase structure of PdCdZn x and PdZn x Cd 1− x , the competitive relationship of Zn and Cd in the alloying process with Pd was unveiled: Pd 1 Cd 1 intermetallics (IMC) is thermodynamically favored over Pd 1 Zn 1 IMC in the ternary system. However, the increased structure stability of PdCd over PdZn does not bring about increased durability in the catalytic ethanol oxidation reaction. The morphology selection of Pd seeds is also crucial for the study, as Pd cubes, Pd tetrahedrons, and Pd octahedrons do not form PdZn in the same protocol. The successful alloying through the seeded growth depends on the maximum diffusion depth of foreign atoms into the seed.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
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IF 13.2
Dawei Chen,Bin He,Shuai Jiang,Xilong Wang,Jie Song,Hao Chen,Dan Xiao,Qian Zhao,Yan Meng,Yujue Wang
Modifications through doping at both the anion site and the transition metal site within P2-type layered oxide cathodes for sodium-ion batteries typically exhibit a synergistic effect, which enhances the performance of these sodium-ion batteries. In this study, a prominent enhancement in the performance of P2-Na 0.67 Ni 0.15 Fe 0.20 Mn 0.65 O 2 (NFM) was achieved through a Zn/F dual-site doping strategy. The doped material P2-Na 0.67 Zn 0.05 Ni 0.15 Fe 0.20 Mn 0.60 O 1.95 F 0.05 (ZNFMF), prepared by co-precipitation followed by solid-state mixing and calcination method, exhibits superior cycling stability and rate performance in electrochemical tests. The doping of Zn/F optimizes the local electronic structure of the material, reduces the valence state of transition metal (TM) elements, enhances the binding energy between lattice oxygen and TM elements, shortens the TM-O bond length, effectively suppresses structural distortion, and improves the cycling performance and structural stability of the material. In-situ XRD and Raman also confirm the improved structural reversibility of the material during the cycling process. The nano-indentation test further confirms that the Young’s modulus and hardness of the ZNFMF is significantly improved compared to NFM during the cycling process. This research successfully improves the structural stability, electrochemical performance, and air stability of the sodium-ion battery cathode material through Zn/F dual-site doping, providing new ideas and methods for the further research and development of sodium-ion battery cathode materials.
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高影响因子
FUEL
·
2025
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IF 7.5
Dawei Wu,Aijia Zhang,Jing Liu,Yingju Yang
MFe 2 O 4 (M = Ca, Mn, Co, Ni, Cu and Zn) spinel sorbents were synthesized by a low-temperature sol–gel auto-combustion method for arsenic adsorption from flue gas. CuFe 2 O 4 spinel exhibited the highest arsenic removal performance among these sorbents, and the adsorption capacity reached 14.09 mg/g at 800 °C. The pseudo-first order, pseudo-second-order and Elovich kinetic models can well predict arsenic removal process, which indicates that the mass transfer and chemisorption processes are important during arsenic capture by CuFe 2 O 4 . The impact of incineration flue gas components on As 2 O 3 adsorption was elucidated. It was found that HCl showed negligible effect on arsenic removal by CuFe 2 O 4 sorbent while CO 2 , H 2 O, SO 2 and NO played inhibition roles. X-ray photoelectron spectroscopy results revealed that the adsorbed arsenic exists in the forms of As 3+ and As 5+ on the sorbent surface. The chemisorption and oxidation mechanisms are responsible for arsenic adsorption by CuFe 2 O 4 . The toxicity characteristic leaching procedure and sequential extraction experiments demonstrated that arsenic can be considerably immobilized in the CuFe 2 O 4 sorbent. The high arsenic capture capacity, excellent HCl resistance and low risk of secondary contamination make CuFe 2 O 4 an efficient sorbent for gaseous arsenic capture.
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CHEMICAL ENGINEERING JOURNAL
·
2024
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IF 13.3
Muhammad Mubeen,Jingmao Zhao,Mohammad Tabish,Jingbao Wang,Mubashar Mahmood,Hassan Murtaza,Muhammad Jawad,Baomin Fan,Ghulam Yasin
Dual threats of over-film (degradation) and under-film filiform corrosion (FFC) pose a significant challenge to the reliable application of Zn-Al-Mg coated steel (ZAM-steel), necessitating the development of effective protection strategies. This study introduces a novel MRS@GO nanohybrid, integrated within epoxy (EP) coatings, to enhance the corrosion resistance of ZAM-steel in 3.5 wt% NaCl solution. The hierarchical structure of MRS@GO synergistically combines the barrier properties of an insulating material (MRS) with the electrochemical benefits of a conducting material (GO), providing superior protection. This dual functionality significantly improves the overall performance and durability of ZAM-steel, making it a promising candidate as the decorative coating for the automotive industry.
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高影响因子
ENERGY & FUELS
·
2024
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IF 5.2
Lijuan Peng,Jiahuan Zhong,Chengkai Zhang,Yaohao Zhang,Dingsheng Yuan
Flexible quasi-solid zinc–air batteries, known for their efficiency and promising potential as an energy storage system, have found extensive applications in the fields of portable power supply, wildlife rescue, and flexible wearable devices. Herein, a FeNx/ZnSe/Fe heterojunction nanocomposite anchored on leafy nitrogen-doped carbon (FeNx/ZnSe/Fe–NC) is developed as a highly active bifunctional catalyst via one-step high-temperature selenization of Fe-doped zeolitic imidazolate frameworks 8. The formation of the heterostructure FeNx/ZnSe/Fe is conducive to accelerating electron transfer and improving the activity of the oxygen reduction reaction and oxygen evolution reaction. Moreover, FeNx/ZnSe/Fe–NC exhibits exceptional performance in liquid Zn–air batteries, comparable to the potency of industrially produced catalysts fabricated from precious metals. Notably, the gel polymer electrolyte (GPE) with a double-network structure, composed of poly(vinyl alcohol)- and polyacrylamide-modified with dimethyl sulfoxide (PVA–PAM–DMSO), exhibits significantly higher conductivity (193.5 mS cm–1) and excellent water retention (93.6%). As a result of the FeNx/ZnSe/Fe–NC catalyst and PVA–PAM–DMSO GPE, a flexible Zn–air battery with high-rate capability has been achieved, which demonstrates a high open-circuit potential of 1.51 V. This battery displays exceptional performance with excellent durability, adaptability, and adjustment capacity across a broad temperature range.
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Advanced Science
·
2024
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IF 14.3
Yuanze Yu,Qian Zhang,Pengfei Zhang,Xu Jia,Hongjiang Song,Shengkui Zhong,Jie Liu
The practical application of aqueous Zn-ion batteries (AZIBs) is hindered by the crazy Zn dendrites growth and the H 2 O-induced side reactions, which rapidly consume the Zn anode and H 2 O molecules, especially under the lean electrolyte and Zn anode. Herein, a natural disaccharide, d -trehalose (DT), is exploited as a novel multifunctional co-solvent to address the above issues. Molecular dynamics simulations and spectral characterizations demonstrate that DT with abundant polar −OH groups can form strong interactions with Zn 2+ ions and H 2 O molecules, and thus massively reconstruct the coordination structure of Zn 2+ ions and the hydrogen bonding network of the electrolyte. Especially, the strong H-bonds between DT and H 2 O molecules can not only effectively suppress the H 2 O activity but also prevent the rearrangement of H 2 O molecules at low temperature. Consequently, the AZIBs using DT30 electrolyte can show high cycling stability even under lean electrolyte (E/C ratio = 2.95 µL mAh −1 ), low N/P ratio (3.4), and low temperature (−12 °C). As a proof-of-concept, a Zn||LiFePO 4 pack with LiFePO 4 loading as high as 506.49 mg can be achieved. Therefore, DT as an eco-friendly multifunctional co-solvent provides a sustainable and effective strategy for the practical application of AZIBs.
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DOI
PubMed
高影响因子
DYES AND PIGMENTS
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2024
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IF 4.1
Song Wei,Xiang Luo,Shaofeng Shao,Lei Zhang
Machine learning-assisted synthesis of new materials has been an ongoing hot topic. Luminescent Ag–Zn–In–S quaternary semiconductor quantum dot thin films have great application potential in many fields because of their excellent photoelectric performance. In this study, an environmentally friendly ionic liquid-assisted approach was employed to prepare high-performance Ag–Zn–In–S luminescent thin films, and machine learning methods were applied to screen the optimal preparation conditions. The photoluminescence (PL) performance, crystal structure, and morphology of the thin films were also been studied. The initial data set was obtained by high-throughput experiments. By comparing machine learning algorithms of Xgboost, Random Forest, Bagging, SVM, Extra Tree, and Gradient Boosting, the Random Forest achieved the best accuracy (r = 0.84, R 2 = 0.847) and was selected to predict the optimal preparation conditions of Ag–Zn–In–S quaternary quantum dot thin films. The machine learning predicted results are in great agreement with the subsequent experimental results, which verifies the accuracy and effectiveness of the machine learning model. This study offers a theoretical foundation for preparing optimal inorganic quantum dot luminescent materials using machine learning.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
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IF 4.9
Xianhong Zheng,Jinhao Tang,Qiaole Hu,Zongqian Wang,Zhi Liu,Changlong Li,Xiaoshuang Zhou,Ying Zhang,Hao Jia
Flexible yarn-shaped aqueous zinc ion batteries (AZIBs) show great promise for wearable and portable energy devices due to their low cost, small volume, flexibility, and compatibility with textiles. However, challenges such as low capacity and energy density due to sluggish Zn 2+ ion kinetics prevent their practical applications in wearable electronics. Herein, we develop a strategy involving Na + ions and polyaniline co-intercalation, along with coaxially wrapping, to fabricate yarn-shaped AZIBs containing core-sheath carbon nanotube/Na + ion and polyaniline co-intercalated NH 4 V 4 O 10 (NaNVO-PANI) yarn cathode and zinc wire anode. The NaNVO-PANI structure enhances electrochemical performance by enlarging interlayer spacing and improving electronic conductivity. The resulting yarn batteries exhibit high specific capacity (346.9 mA h g −1 ), energy density (255.2 Wh kg −1 ), and long cycling life, making them suitable for self-powered energy systems. Notably, the CNT sheet sheath enables tunable charge storage kinetics by accelerating ion mixing between the electrolyte fluid and electrode interface through turbulence effects. This work is of great significance for developing high-performance flexible yarn-shaped AZIBs for wearable electronics.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
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IF 13.3
Xue Liu,Wei Yan,Jie Song,Hao Song,Wenmiao Chen,Yuexing Zhang,Yanli Chen
Enhancing the exposure of active sites and optimizing the electronic structure of the catalysts are indispensable for efficient catalyst design, yet remains challenging in the renewable energy field. Herein, a sequential pyrolyzing and phosphating approach for a well-designed GO/CoTPP gel precursor has been explored to prepare a Co-based carbon catalyst containing single-atom Co-N x and hollow Co 2 P active species (Co 2 P/Co-N-C) for multifunctional electrocatalytic reactions. Kirkendall effect occurring during the template-free one-pot phosphating approach induced the formation of the hollow Co 2 P structure in the catalyst, simultaneously optimizing the electron structure and allowing the active sites to be exposed to a greater extent. DFT calculations demonstrated that the Co 2 P and Co-N x structures enable Co 2 P/Co-N-C to have a suitable d-band center depending on the electron transfer from Co 2 P to Co-N x , which enhances the adsorption of O* and the dissociation of OH* in oxygen electrode reactions, thereby facilitates catalytic reactions. As a result, the Co 2 P/Co-N-C exhibits excellent trifunctional activity with a half-wave potential of 0.89 V in alkaline for oxygen reduction reaction (ORR), overpotentials of 330 mV for oxygen evolution reaction (OER) and 190 mV for hydrogen evolution reaction (HER), respectively, which are among the best results reported to date for Co-containing carbon-based catalysts. Furthermore, the flexible Zinc-air battery with Co 2 P/Co-N-C electrodes also demonstrates a high open circuit voltage of 1.35 V, which is applied to build the self-powered device for water splitting continuously. Our work provides a facile strategy to prepare high-performance trifunctional catalysts by morphology/structure control of metal-based NPs on carbon-based materials.
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高影响因子
POLYMER DEGRADATION AND STABILITY
·
2024
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IF 6.3
Wufei Tang,Huimin Zhang,Ting Liu,Xinle Li,Hua Yang,Weizhen Huang,Yunhui Liao,Xiaoyu Gu,Sheng Zhang
Ethylene vinyl acetate copolymer (EVA) is widely applied in many important fields, but its broader utility is impeded by its flammability . To address this problem, the pre-acidified kaolinite (AKaol) by sulfuric acid was further dealt with TiO 2 loading and Zn 2+ doping to obtain Zn/TiO 2 @AKaol to improve the flame retardancy and smoke suppression of EVA composites containing intumescent flame retardants (IFR) typically. The results showed that the addition of 1 wt% Zn/TiO 2 @AKaol improved the flame retardancy and reduced the smoke release of EVA/IFR composite. The limiting oxygen index (LOI) value of the EVA/IFR composite containing Zn/TiO 2 @AKaol increased to 32.7 % from 27.3 % of EVA/IFR composite. In the cone calorimeter test (CCT), the peak heat release rate (pHRR) and total heat release (THR) values were reduced to 297.5 kW/m 2 and 98.8 MJ/m 2 from the 409.9 kW/m 2 and 109.3 MJ/m 2 of EVA/IFR composite, respectively. Meanwhile, the values of total smoke production (TSP) in the CCT and smoke density tests in building materials were reduced to 13.5 m 2 and 33.39 % of EVA/IFR/Zn/TiO 2 @AKaol composite from 18.4 m 2 and 63.91 % of EVA/IFR composite, respectively. Based on the mechanism analysis, it was proposed that Zn/TiO 2 @AKaol not only promoted the production of P· in advance, but also increased a cross-linked structure char in the condensed phase to achieve flame retardancy and smoke suppression of EVA composites.
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高影响因子
APPLIED SURFACE SCIENCE
·
2025
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IF 6.9
Yuemei Li,Yongmei Li,Yunfei Qu
Zn alloy stents, as implantable cardiac devices, have broad application prospects in the field of heart. However, excessive Zn 2+ release during degradation remains a challenge for biocompatibility. Here, the Yb/Er/CeO 2 coating is grown on the Zn substrate, which inhibits the release of Zn 2+ and enhances the corrosion resistance of Zn stent. Under 980 nm excitation, the Yb/Er/CeO 2 coating enables electron transitions from the valence band to the conduction band. This process catalyzes H 2 O and O 2 to generate reactive oxygen species (ROS), such as ∙OH. These ROS act as chemical linkers to accelerate the deposition of the drug-eluting PLGA coating. The Zn@Yb/Er/CeO 2 /PLGA composite demonstrates excellent biodegradability. It shows great potential for treating cardiovascular diseases.
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高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Minghui Wang,Yuqian Song,Han Diao,Wenjing Sun,Senjie Dong,Ding Yuan
Developing innovative, efficient, and economical oxygen reduction reaction (ORR) electrocatalysts for zinc-air batteries (ZABs) is critical but challenging, and biomimetic-designed hybrid catalysts stand out. In this work, the hierarchical N-doped carbon nanofibers (Ru@FeZn-HNC/CNFs) anchored by ultra-small Ru nanoparticles (NPs) was achieved by covalent organic framework/metal organic framework (COF/MOF) template approach combined with electrospinning technology, which exhibits a unique and stable biomimetic “branch and leaf” morphology. This distinctive biomimetic architecture not only facilitates fast charge transfer and mass transport, but also exposes more active sites (Ru NPs, M-N x , and active N species). It is possible to remarkably reduce the Ru content without sacrificing ORR activity, thus ensuring cost-effectiveness. Specifically, the synthesized catalyst presents impressive limiting current density (J L = 6.15 mA cm −2 ), outstanding half-wave potential (E 1/2 = 0.85 V), high 4e − selectivity (H 2 O 2 yield <2 %) and distinguished durability (94.7 % current retention after 20 h) at low Ru loading, surpassing the state-of-art Pt/C catalyst. Furthermore, the aqueous/solid-state ZABs assembled by Ru@FeZn-HNC/CNFs perform significantly better open-circuit voltage (1.48 V and 1.41 V), power density (175 mW cm −2 and 86.9 mW cm −2 ), specific capacity (810.2 mAh g Zn −1 and 720.2 mAh g Zn −1 ), and long-term cycling durability (> 300 h and 1000 min) than Pt/C-based counterparts. Intriguingly, Ru@FeZn-HNC/CNFs-based flexible ZABs demonstrate satisfactory foldability and mechanical stability. This study evidences the feasibility of Ru@FeZn-HNC/CNFs catalyst employed as air cathode of ZABs, and opens up a new avenue for the exploration of flexible wearable energy supply devices.
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