Electrochemistry Communications最新文献_第10页

A sandwich-type electrochemical immunosensor for cardiac troponin I based on β-cyclodextrin functionalized 3D graphene incorporated with Ag nanoclusters 基于β-环糊精功能化三维石墨烯结合银纳米团簇的三明治型心肌肌钙蛋白I电化学免疫传感器

IF 4.7 3区工程技术 Q2 ELECTROCHEMISTRY

Electrochemistry Communications

Pub Date : 2025-06-17 DOI: 10.1016/j.elecom.2025.107978

Fang Liu, Yingying Gao, Ying Guo, Jianchun Li, Wei Huo, Weiwei Dai

Cardiac troponin I (cTnI) detection plays a critical role in the early diagnosis of acute myocardial infarction (AMI). In this study, a sandwich-type electrochemical immunosensor was developed for ultrasensitive quantification of cardiac troponin I (cTnI). The sensor platform utilized silver nanoclusters (AgNCs) incorporated with

β

-cyclodextrin functionalized 3D porous graphene (

β

-CD@3DG-AgNCs) to enhance electrical conductivity and primary antibody (Ab

_{1}

) immobilization. For signal amplification, ferrocenecarboxylic acid combined with

β

-CD@3DG (

β

-CD@3DG-Fc-COOH) was employed as the signal probe, which demonstrated excellent secondary antibody (Ab

_{2}

) capture capability. The synthesized nanomaterials were characterized using SEM, TEM, FTIR spectroscopy, X-ray Photoelectron Spectroscopy (XPS) and Thermo-Gravimetric Analysis (TGA). The electrochemical performance of the surface-modified electrodes was systematically investigated through cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). Under optimized conditions, differential pulse voltammetry (DPV) revealed that the developed sensor exhibited an extensive linear response range (100 fg mL⁻¹–100 ng mL⁻¹) for cTnI quantification, with an exceptionally low detection limit of 45.5 fg mL⁻¹. The recovery rate ranging from 97.39% to 102.83% was achieved in human serum analysis, suggesting the potential applicability of this immunosensor for clinical diagnosis.

心肌肌钙蛋白I （cTnI）检测在急性心肌梗死（AMI）的早期诊断中起着至关重要的作用。本研究开发了一种三明治型电化学免疫传感器，用于超灵敏定量心肌肌钙蛋白I （cTnI）。该传感器平台利用银纳米团簇（agnc）结合β-环糊精功能化的三维多孔石墨烯（β-CD@3DG-AgNCs）来增强电导率和一抗（Ab1）固定。二茂铁羧酸结合β-CD@3DG （β-CD@3DG-Fc-COOH）作为信号探针，具有良好的二抗（Ab2）捕获能力。利用扫描电镜（SEM）、透射电镜（TEM）、红外光谱（FTIR）、x射线光电子能谱（XPS）和热重分析（TGA）对合成的纳米材料进行了表征。通过循环伏安法（CV）和电化学阻抗谱法（EIS）系统地研究了表面修饰电极的电化学性能。在优化条件下，差分脉冲伏安法（DPV）表明，所开发的传感器对cTnI定量具有广泛的线性响应范围（100 fg mL−1 - 100 ng mL−1），检测限极低，为45.5 fg mL−1。在人血清分析中，该免疫传感器的回收率为97.39% ~ 102.83%，提示该免疫传感器在临床诊断中的潜在适用性。

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引用次数: 0

Assessing the performance of novel and sustainable electrochemical sensor based on cobalt sulfide/upcycled reduced graphene oxide from plastic waste 评估基于硫化钴/从塑料废物中升级回收的还原性氧化石墨烯的新型可持续电化学传感器的性能

IF 4.7 3区工程技术 Q2 ELECTROCHEMISTRY

Electrochemistry Communications

Pub Date : 2025-06-16 DOI: 10.1016/j.elecom.2025.107982

Arafat Toghan , N. Roushdy , Sami A. Al-Hussain , Mohamed S. Elnouby , Samah M. Yousef , A.A.M. Farag , M. Elsayed Youssef , Noha A. Elessawy

Developing electrochemical sensors that are both highly sensitive and environmentally sustainable is a pressing need in modern healthcare and environmental analysis. In this study, a cobalt sulfide/reduced graphene oxide (CoS/rGO) nanocomposite was synthesized via a straightforward, low-cost method that integrates thiourea and cobalt acetate to form CoS, with rGO derived from recycled plastic waste. The structural and electrochemical properties of the composites were systematically investigated using cyclic voltammetry (CV) and linear sweep voltammetry (LSV). The addition of rGO, varied from 0 to 50 wt%, notably enhanced the electrical conductivity and surface activity of the sensing interface. Among the tested formulations, the composite containing 40 wt% rGO exhibited the highest performance, achieving a sensitivity of 12.4 μA mM⁻¹ cm⁻² and a detection limit of 0.2 μM, which is approximately 7.5 times lower than that of pristine CoS. Kinetic analysis confirmed that the sensing mechanism follows a pseudo-second-order model, indicative of a chemisorption-driven interaction between paracetamol molecules and the sensor surface. The sensor displayed excellent operational stability over 100 consecutive cycles and high repeatability with a relative standard deviation below 2.5 %. This work demonstrates a novel, green strategy for sensor fabrication that effectively combines electronic functionality with environmental sustainability, making the CoS/rGO nanocomposite a viable platform for next-generation sensing technologies.

开发高灵敏度和环境可持续性的电化学传感器是现代医疗保健和环境分析的迫切需要。在这项研究中，通过一种简单、低成本的方法合成了硫化钴/还原氧化石墨烯（CoS/rGO）纳米复合材料，该复合材料将硫脲和醋酸钴结合在一起形成CoS，而还原氧化石墨烯来自回收的塑料废物。采用循环伏安法（CV）和线性扫描伏安法（LSV）对复合材料的结构和电化学性能进行了系统的研究。rGO的添加量从0 wt%到50 wt%不等，显著提高了传感界面的电导率和表面活性。在所测试的配方中，含有40 wt%还原氧化石墨烯的复合物表现出最高的性能，其灵敏度为12.4 μA mM−1 cm−2，检出限为0.2 μM，比原始CoS低约7.5倍。动力学分析证实，感应机制遵循伪二阶模型，表明扑热息痛分子与传感器表面之间存在化学吸附驱动的相互作用。该传感器在100个连续周期内表现出优异的工作稳定性和高重复性，相对标准偏差低于2.5%。这项工作展示了一种新颖的绿色传感器制造策略，有效地将电子功能与环境可持续性相结合，使CoS/rGO纳米复合材料成为下一代传感技术的可行平台。

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引用次数: 0

Exploration of the structural, optical, and dielectric performance of Mg-doped Sr2FeNbO6 double perovskite for wireless applications 无线应用中掺镁Sr2FeNbO6双钙钛矿结构、光学和介电性能的探索

IF 4.7 3区工程技术 Q2 ELECTROCHEMISTRY

Electrochemistry Communications

Pub Date : 2025-06-11 DOI: 10.1016/j.elecom.2025.107981

Asif Ullah , Farman Ullah , Kamran Ullah , Fida Rehman , Aiyeshah Alhodaib , Salhah Hamed Alrefaee , Shaxnoza Saydaxmetova , Salah Knani , Vineet Tirth , Ali Algahtani , Abid Zaman

This study examined the effects of Mg doping on the structural, optical, photoluminescence, and dielectric properties of a series of double perovskite Sr_2-xMgₓFeNbO₆ (0.00 ≤ x ≤ 0.40) ceramics that is successfully manufactured by using the mixed oxide route. It was proven by X-ray diffraction that a single-phase monoclinic perovskite (space group P21/c.) had formed, and at increasing Mg concentrations, SEM showed reduced porosity and increased grain uniformity. Tauc analysis and UV–Vis spectroscopy revealed a consistent decrease of the bandgap from 2.77 eV to 2.46 eV, which was ascribed to defect-induced electronic states and lattice distortion. The presence of levels of recombination-active defects was further confirmed by photoluminescence spectra. At high temperatures (∼560 °C), dielectric studies revealed a low loss (tanδ = 2.0) and a high dielectric constant (εᵣ ≈800), which made these materials attractive options for wireless communication components. Mg-doped Sr₂FeNbO₆ ceramics have the potential for advanced applications in microwave electronics and optoelectronics due to their superior dielectric behavior, bandgap tunability, and integrated structural stability.

本研究考察了Mg掺杂对成功制备的双钙钛矿型Sr2-xMgₓFeNbO₆（0.00≤x≤0.40）陶瓷的结构、光学、光致发光和介电性能的影响。x射线衍射证实，形成了一种单相单斜钙钛矿（空间群P21/c.），随着Mg浓度的增加，SEM显示孔隙率降低，晶粒均匀性增加。Tauc分析和UV-Vis光谱显示，带隙从2.77 eV持续减小到2.46 eV，这是由于缺陷引起的电子态和晶格畸变所致。光致发光光谱进一步证实了重组活性缺陷水平的存在。在高温（~ 560°C）下，介电研究表明，这些材料具有低损耗（tanδ = 2.0）和高介电常数（εᵣ≈800），这使得这些材料成为无线通信元件的有吸引力的选择。镁掺杂Sr₂FeNbO₆陶瓷由于其优异的介电性能、带隙可调性和整体结构稳定性，在微波电子和光电子领域具有先进的应用潜力。

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引用次数: 0

Measurement of equilibrium potential of Cl2/Cl− redox couple in molten chlorides 熔融氯化物中Cl2/Cl−氧化还原偶对平衡电位的测定

IF 4.7 3区工程技术 Q2 ELECTROCHEMISTRY

Electrochemistry Communications

Pub Date : 2025-06-10 DOI: 10.1016/j.elecom.2025.107980

Zujian Tang , Qilin Yuan , Shangping Zhu , Osamu Takeda , Hongmin Zhu

The current interruption method is used to determine the equilibrium potential of the Cl₂/Cl⁻ redox couple, and the theory behind the measurement is discussed. Different AgCl/Ag reference electrodes are prepared and calibrated by measuring the equilibrium potential of Cl₂/Cl⁻ redox couple. Cyclic voltammograms against the different AgCl/Ag reference electrodes before and after calibration in pure lithium chloride are reported, showing good agreement with thermodynamic calculations.

采用电流中断法测定了Cl2/Cl−氧化还原对的平衡电位，并讨论了测量背后的理论。通过测量Cl2/Cl−氧化还原对的平衡电位，制备了不同的AgCl/Ag基准电极，并对其进行了标定。报道了在纯氯化锂中校准前后不同AgCl/Ag基准电极的循环伏安图，与热力学计算结果吻合良好。

引用次数: 0

Influence of lithium salt anions on the interfacial properties of PEO-based solid-state electrolytes 锂盐阴离子对peo基固态电解质界面性能的影响

IF 4.7 3区工程技术 Q2 ELECTROCHEMISTRY

Electrochemistry Communications

Pub Date : 2025-06-09 DOI: 10.1016/j.elecom.2025.107979

Yi-Min Wei , An Qiu , Jingchao Wang , Yu Gu , Jian-Feng Li

The use of poly(ethylene oxide) (PEO)-based solid-state electrolytes have shown potential to improve both the energy density and safety performance of lithium-metal batteries. However, these electrolytes often form unstable interfaces with lithium metal anodes, compromising the durability and sustained performance of solid-state lithium-metal batteries. In this study, three lithium salts, lithium (fluorosulfonyl) (trifluoromethanesulfonyl)imide (LiFTFSI), lithium bis(fluorosulfonyl)imide (LiFSI), and lithium bis(trifluoromethanesulfonyl)imide (LiTFSI), were each mixed in equimolar ratios with tetraethylene glycol dimethyl ether (G4) and introduced as a conductivity enhancer in PEO-based solid-state electrolytes. The effects of the lithium salt anions on the electrolyte properties were systematically investigated. Among the three, the fluorosulfonyl group was found to enhance ionic conductivity, while the trifluoromethanesulfonyl group improved thermal stability. Notably, the synergistic interaction between these two groups in LiFTFSI led to the formation of a stable solid-electrolyte interphase (SEI), characterized by a higher content of inorganic species and reduced organic components. As a result, LiFTFSI/G4-based solid-state electrolytes enabled stable cycling for 200 cycles at a 0.5C rate in LiFePO₄-based solid-state lithium-metal batteries, achieving a capacity retention of 91 %. This study provides valuable insights into the optimization of high-efficiency solid-state lithium-metal batteries by elucidating the distinct roles of lithium salt anions.

基于聚环氧乙烷（PEO）的固态电解质的使用已经显示出提高锂金属电池能量密度和安全性能的潜力。然而，这些电解质通常会与锂金属阳极形成不稳定的界面，从而影响固态锂金属电池的耐用性和持续性能。在这项研究中，三种锂盐，锂（氟磺酰基）（三氟甲烷磺酰基）亚胺（LiFTFSI），锂（氟磺酰基）亚胺（LiFSI）和锂（二氟甲烷磺酰基）亚胺（LiTFSI），分别与四乙二醇二甲醚（G4）以等摩尔的比例混合，并作为电导率增强剂引入peo基固态电解质中。系统地研究了锂盐阴离子对电解质性能的影响。其中，氟磺酰基可以增强离子电导率，而三氟甲磺酰基可以提高热稳定性。值得注意的是，在LiFTFSI中，这两组之间的协同作用导致了稳定的固体电解质界面（SEI）的形成，其特征是无机物质含量较高，有机成分减少。结果表明，基于LiFTFSI/ g4的固态电解质能够在0.5℃的温度下在基于lifepo4的固态锂金属电池中稳定循环200次，实现91%的容量保持。本研究通过阐明锂盐阴离子的不同作用，为高效固态锂金属电池的优化提供了有价值的见解。

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引用次数: 0

Electrochemical corrosion of highly conductive Ti-Al-C, (Ti,Mo)-Al-C and (Ti,Cr)-Al-C coatings deposited by hybrid magnetron sputtering using MAX phases-based target 高导电性Ti-Al-C、(Ti,Mo)-Al-C和(Ti,Cr)-Al-C镀层的电化学腐蚀研究

IF 4.7 3区工程技术 Q2 ELECTROCHEMISTRY

Electrochemistry Communications

Pub Date : 2025-05-31 DOI: 10.1016/j.elecom.2025.107977

Viktoriia Shtefan , Tetiana Prikhna , Olexandr Kuprin , Viktoriya Podhurska , Orest Ostash , Pavel Potapov , Semyon Ponomaryov , Myroslav Karpets , Volodymyr Sverdun , Viktor Moshchil , Tetiana Serbenyuk

Amorphous highly conductive coatings Ti-Al-C, (Ti,Mo)-Al-C and (Ti,Cr)-Al-C were deposited on titanium alloy substrates by hybrid magnetron using T₂AlC and Ti₃AlC₂ MAX-phases-based targets and in parallel cathode-arc evaporation of Mo or Cr targets. The (Ti,Cr)-Al-C coating showed the highest electrochemical corrosion resistance among all deposited coatings in 3.5 wt% NaCl aqueous solution at 25 °C: corrosion potential E_corr = 0.044 V vs. saturated calomel electrode, corrosion current density i_corr = 2.48 × 10⁻⁹ A/cm². The (Ti,Cr)-Al-C coating also demonstrated the highest long-term oxidation resistance, and after heating in air at 600 °C for 1000 h, its surface electrical conductivity became even slightly higher after long-term heating: increased from σ = 9.84 × 10⁶ S/m to σ = 4.35 × 10⁵ S/m, which is explained by the crystallization of the amorphous coating during heating process. The nanohardness and Young's modulus of the coating after deposition were within 15 GPa and 240 GPa, respectively. The hybrid magnetron deposited (Ti,Cr)-Al-C coatings can be used to protect interconnects in lightweight molten carbonate fuel cells elements.

以T2AlC和Ti3AlC2为基体，采用平行阴极电弧蒸发Mo或Cr为基体，采用混合磁控管在钛合金基体上制备了Ti-Al-C、(Ti,Mo)-Al-C和(Ti,Cr)-Al-C非晶高导电镀层。在3.5 wt% NaCl水溶液中，(Ti,Cr)-Al-C镀层在25℃下的电化学耐蚀性最高，腐蚀电位Ecorr = 0.044 V，腐蚀电流密度icorr = 2.48 × 10−9 A/cm2。（Ti,Cr）-Al-C涂层也表现出最高的长期抗氧化性，在600℃空气中加热1000 h后，其表面电导率甚至在长期加热后略有提高，从σ = 9.84 × 106 S/m增加到σ = 4.35 × 105 S/m，这是由于加热过程中非晶态涂层的结晶所致。沉积后涂层的纳米硬度和杨氏模量分别在15 GPa和240 GPa以内。混合磁控管沉积(Ti,Cr)-Al-C涂层可用于保护轻质熔融碳酸盐燃料电池元件的互连。

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引用次数: 0

Electrodeposition of uniform granular carbon on an Ag electrode by CO2 reduction in triethylpentylphosphonium bis(trifluoromethanesulfonyl)imide 用三乙基戊基磷二（三氟甲磺酰基）亚胺还原CO2在银电极上电沉积均匀颗粒碳

IF 4.7 3区工程技术 Q2 ELECTROCHEMISTRY

Electrochemistry Communications

Pub Date : 2025-05-31 DOI: 10.1016/j.elecom.2025.107976

Yuki Kakiuchi , Yuta Suzuki , Hidekazu Kobatake , Seiya Tanaka , Takuya Goto

Carbon electrodeposition on a conductive substrate from CO₂ in ionic liquids is an attractive process for a unique CO₂ conversion technique. This study provides a method for the electrodeposition of uniformly arranged granular carbon particles onto an Ag substrate from CO₂ by potential-step application in P₂₂₂₅-TFSI at room temperature. The potential-step electrolysis, where the −3.0 and −0.40 V (vs. Ag⁺/Ag) were applied for 1 min each, followed by −1.0 V for 3.2 s for 20 sets, was conducted to reduce CO₂ to silver carbonyl ions and then to solid carbon electrochemically. The SEM image with EDS elemental analysis for the electrodeposits exhibited that granular carbon particles uniformly arranged and ca. 0.4 μm in size were covered on the Ag surface. This result indicates that carbon nucleation could be preferentially induced at the Ag/P₂₂₂₅-TFSI interface when applying the potential in the third step for a few seconds. Raman spectroscopy and XRD analyses revealed that the electrodeposited carbon grains comprised hexagonal carbon, graphite, and η-diamond. Moreover, we proposed a model for the formation mechanism of the carbon grains on the Ag substrate in the electrolysis based on the observed morphological changes in the electrodeposited carbon when the number of times the step electrolysis was changed. The reported data demonstrated that it is possible to electrochemically control the nucleation and growth phenomena of carbon from CO₂ at room temperature, which is expected to contribute to producing functional carbon materials as a novel CO₂ recycling technology.

离子液体中的二氧化碳在导电衬底上电沉积碳是一种独特的二氧化碳转化技术。本研究提供了一种在室温下用P2225-TFSI电极在银衬底上电沉积均匀排列的碳颗粒的方法。电位阶跃电解，−3.0和−0.40 V （vs. Ag+/Ag）各1 min，然后−1.0 V, 3.2 s，共20组，将CO2电化学还原为银羰基离子，然后转化为固体碳。镀层的SEM和EDS元素分析结果表明，银表面覆盖了粒径约0.4 μm、排列均匀的碳颗粒。结果表明，在第三步中施加几秒钟的电势，可以优先在Ag/P2225-TFSI界面诱导碳成核。拉曼光谱和XRD分析表明，电沉积碳颗粒由六方碳、石墨和η-金刚石组成。此外，我们根据观察到的电沉积碳在电解过程中随着电解次数的变化而发生的形态变化，提出了电解过程中银衬底上碳颗粒形成机制的模型。研究结果表明，在室温下电化学控制CO2中碳的成核和生长现象是可能的，这有望为生产功能碳材料作为一种新的CO2回收技术做出贡献。

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引用次数: 0

Multi-channel Hcy/FA aptasensors and cTnT immunosensors used for early screening of H-type hypertension and myocardial infarction 多通道Hcy/FA配体传感器和cTnT免疫传感器在h型高血压和心肌梗死早期筛查中的应用

IF 4.7 3区工程技术 Q2 ELECTROCHEMISTRY

Electrochemistry Communications

Pub Date : 2025-05-29 DOI: 10.1016/j.elecom.2025.107966

Xinjie Song , Jie Fu , Jiawang Wang , Fangying Xiong , Jing Zhang , Shuang Li

Elevated levels of homocysteine (Hcy) and decreased levels of folic acid (FA) are frequently observed in individuals with H-type hypertension (HTH). However, HTH increases Repeatability, reproducibility and stability of Hcy aptasensorrisk of acute myocardial infarction (AMI). Elevated cardiac troponin T (cTnT) levels are particularly significant in patients with AMI. Nevertheless, the effective detection of Hcy, FA, and cTnT remains challenging due to the lack of a reliable, cost-effective, and rapid method that can accurately predict, promptly detect, and effectively guide the treatment of these conditions. To address this issue, aptasensors for Hcy and FA as well as immunosensors for cTnT were developed based on amultiple electrochemical system. The concentration of Hcy and FA exhibited a good linear relationship with the relative redox peak current within the ranges of 1–100 μM and 10–50 nM, respectively, due to conformational changes in the aptamer. Similarly, the concentration of cTnT demonstrated a good linear relationship with the relative redox peak current of the electrode within the range of 1–60 pg/mL, attributed to changes in electron transfer following antigen-antibody binding. The experimental results confirmed that the aptasensors and immunosensors exhibited excellent repeatability, reproducibility, stability, and specificity. In real serum sample, this biosensor showed an acceptable recovery rate. These findings suggest that the proposed sensors hold significant potential for the early detection of HTH and AMI.

同型半胱氨酸（Hcy）水平升高和叶酸（FA）水平降低在h型高血压（HTH）患者中经常观察到。然而，HTH增加了Hcy对急性心肌梗死（AMI）风险的重复性、再现性和稳定性。心肌肌钙蛋白T （cTnT）水平升高在AMI患者中尤为显著。然而，由于缺乏一种可靠、经济、快速的方法来准确预测、及时检测和有效指导这些疾病的治疗，Hcy、FA和cTnT的有效检测仍然具有挑战性。为了解决这一问题，开发了基于多电化学系统的Hcy和FA适配传感器以及cTnT免疫传感器。在1 ~ 100 μM和10 ~ 50 nM范围内，Hcy和FA浓度与相对氧化还原峰电流呈良好的线性关系，这是由于适体的构象变化所致。同样，cTnT的浓度与电极的相对氧化还原峰电流在1-60 pg/mL范围内表现出良好的线性关系，这归因于抗原-抗体结合后电子转移的变化。实验结果证实，适体传感器和免疫传感器具有良好的重复性、再现性、稳定性和特异性。在实际血清样品中，该生物传感器显示出可接受的回收率。这些发现表明，所提出的传感器在HTH和AMI的早期检测中具有重要的潜力。

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引用次数: 0

Selective electrocatalytic nitrate reduction to dinitrogen: Mechanisms, catalysts, and challenges 选择性电催化硝酸还原为二氮：机制、催化剂和挑战

IF 4.7 3区工程技术 Q2 ELECTROCHEMISTRY

Electrochemistry Communications

Pub Date : 2025-05-29 DOI: 10.1016/j.elecom.2025.107964

Jiayu Chen , Anni Wu , Yongfeng Xie , Yumin Zhang , Hu Zheng , Wei Teng

Electrocatalytic reduction of nitrate to dinitrogen (N₂) offers a sustainable, carbon-neutral approach to mitigate nitrate pollution by transforming nitrate into an environmentally benign end-product. While extensive research has focused on ammonia production, selective N₂ production remains challenging due to complex pathways, limitations in detection, and the difficulty of controlling reaction on the electrocatalysts. This review provides an overview of current progress in this field, focusing on mechanistic insights, N₂ detection methods, and advances in catalyst design. Various classes of electrocatalysts, including monometallic, bimetallic, and single-atom systems, oxide-based and carbon-based materials, examining how their structures regulate key intermediates and NN coupling. The influence of operational parameters such as applied potential, electrolyte, pH, and reactor design is also reviewed. Despite significant advances, challenges remain in understanding interfacial mechanisms and achieving high N₂ selectivity under realistic conditions. This review aims to offer timely insights and guidance for the future development of efficient electrocatalytic systems toward selective nitrate-to-N₂ conversion, advancing environmental remediation and sustainable nitrogen management.

电催化还原硝酸盐为二氮（N2）提供了一种可持续的、碳中性的方法，通过将硝酸盐转化为对环境无害的最终产品来减轻硝酸盐污染。虽然广泛的研究集中在氨的生产上，但由于复杂的途径、检测的局限性以及在电催化剂上控制反应的难度，选择性生产N2仍然具有挑战性。本文综述了该领域的最新进展，重点介绍了机理、N2检测方法和催化剂设计的进展。各种类型的电催化剂，包括单金属、双金属和单原子系统、氧化物基和碳基材料，研究它们的结构如何调节关键中间体和神经网络耦合。同时对应用电位、电解液、pH值和反应器设计等操作参数的影响进行了综述。尽管取得了重大进展，但在理解界面机制和在现实条件下实现高N2选择性方面仍然存在挑战。本文旨在为未来高效电催化系统的发展提供及时的见解和指导，以实现硝酸盐选择性转化为n2，推进环境修复和可持续的氮管理。

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引用次数: 0

Unraveling ionic transport in polymer-ceramic electrolytes: Insights into superionic interphases 解开聚合物-陶瓷电解质中的离子传输：对超离子界面相的洞察

IF 4.7 3区工程技术 Q2 ELECTROCHEMISTRY

Electrochemistry Communications

Pub Date : 2025-05-28 DOI: 10.1016/j.elecom.2025.107960

F. Gerbig , N. Röttgen , M. Holzapfel , G. Dück , M. Finsterbusch , H. Nirschl

This study investigates the transport phenomena in composite solid electrolytes (CSEs) based on polyethylene oxide (PEO) and ceramic fillers for sodium-ion batteries. Numerical microstructure simulations, paired with experimental conductivity measurements, were conducted to explore the mechanisms of ionic transport in these materials. Incorporating

into a PEO matrix did not significantly enhance ionic conductivity compared to the pure polymer. However, a CSE containing

showed notable improvements in conductivity. Despite these enhancements, the measured conductivities remained lower than predicted by models assuming full ionic transport through both the polymer and ceramic phases, suggesting that the assumption of complete charge transport through the ceramic filler is overly optimistic. The data suggests that amorphization in the PEO matrix induced by ceramic fillers is not the main driver for enhanced ionic conductivity of the CSE, as improvements were observed at both room temperature and above the glass transition temperature of PEO. A more plausible explanation for the observed conductivity enhancement lies in the presence of a superionic interphase at the polymer–ceramic interface. Simulations suggest that this interphase, with submicrometer thickness and ionic conductivity higher than those of the bulk PEO, plays a significant role in facilitating ion transport.

研究了钠离子电池用聚乙烯氧化物（PEO）和陶瓷填料复合固体电解质（CSEs）中的输运现象。数值微观结构模拟，结合电导率实验测量，探讨了离子在这些材料中的输运机制。与纯聚合物相比，加入PEO基质并没有显著提高离子电导率。然而，含有CSE的材料在电导率方面表现出显著的改善。尽管有这些增强，但测量的电导率仍然低于假设离子通过聚合物和陶瓷相完全传输的模型的预测，这表明通过陶瓷填料完全传输电荷的假设过于乐观。数据表明，陶瓷填料诱导的PEO基体中的非晶化并不是CSE离子电导率增强的主要驱动因素，因为在室温和PEO的玻璃化转变温度以上都观察到改善。对观察到的电导率增强的一个更合理的解释是在聚合物-陶瓷界面上存在超离子界面相。模拟结果表明，该界面相具有亚微米厚度，且离子电导率高于大块PEO，在促进离子传输中起着重要作用。

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引用次数: 0