Journal of Solid State Electrochemistry最新文献

An electrochemical sensor based on Cu₃(BTC)₂ MOF-fabricated screen-printed carbon electrode (SPCE) was employed for Cd(II) detection. The Cu₃(BTC)₂ was synthesized via a straightforward solvothermal approach and characterized by XRD, FT-IR, TGA, and FE-SEM. The XRD of the synthesized Cu₃(BTC)₂ was in good agreement with the existing Cu₃(BTC)₂ (CCDC 112954). The FT-IR results revealed the absorption bands at 1368–1446 cm⁻¹ and 1554–1640 cm⁻¹ which may be ascribed to the bridged bidentate coordination of carboxylate groups in Cu₃(BTC)₂ MOF. The Cu₃(BTC)₂-modified electrode offers the facile electron transfer and greater electrochemical surface area compared to the bare electrode. The recovery of Cd(II) ranged from 102.68 to 115.36%, which proves the practical applicability of the Cu₃(BTC)₂/SPCE electrode.

Rapid exhaustion of non-renewable fuels due to industrialization has molded research to find a feasible approach by recycling wastewater. Incidentally, microbial fuel cells (MFCs) have appeared as a sustainable tool to treat wastewater and convert bioelectricity simultaneously. The limitations—microbial poisoning, electrode decay, and the potential drop in MFCs—make it unsuitable for high-energy applications. The fabrication of a polymer-metal organic framework (P-MOF)-supported electrode offers high conductivity, improved surface area, and substantial pore volume, resulting in significant MFC power output. The incorporation of MOF with polymer has improved the performance of the electrode owing to its remarkable electrochemical properties. This review highlights the essential insights into the sustainable development goals, emphasizing the physicochemical parameters and biocompatibility of polymer-MOF-modified electrodes. Moreover, the recent advances and the challenges of electrodes to be used in MFCs are discussed. Based on the assessment of power density, the hybrid electrodes could be a remarkable alternative in MFCs.

Heterojunction as negative electrode of sodium ion battery has become a research hotspot. It can not only solve the problem of single-layer negative electrode but also improve the stability by synergy. It has the advantages of high capacity, good magnification, and long cycle. This article is based on first principles and constructs a SiC/Nb₂CO₂ heterojunction composite material using ceramic material 3C-SiC and MXene material Nb₂C. The potential performance of SiC/Nb₂CO₂ heterojunction as a negative electrode material for sodium ion batteries is explored in depth. When constructing heterojunction materials of Nb₂C and 3C-SiC functionalized with O, it was found that the electrochemical performance is excellent, with abundant structural adsorption sites and a significant advantage in theoretical capacity of 588.81 mAh/g. The open circuit voltage at the maximum adsorption concentration is in the ideal range of 0–1 V, which can suppress sodium dendrites and improve battery safety and stability. This study reveals the influence of 3C-SiC and Nb₂CO₂ composite materials on Na ion storage performance, providing a new path and theoretical support for optimizing negative electrode materials for sodium ion batteries, as well as ideas for related research fields, and promoting innovation in the development of sodium ion battery materials.

This study investigated the preparation of pure gold nanoparticles (AuNPs) using laser ablation, highlighting how modification of acidic and alkaline pH improve nanoparticle stability and electrochemical sensing efficacy. The sensing performance of an extended-gate field-effect transistor (EGFET) pH sensor utilizing AuNPs was investigated in different buffer solutions within a pH range of 3 to 11, illustrating the impact of acidity and basicity on transfer characteristics. Adjusting the pH conditions resulted in AuNPs exhibiting enhanced structural stability and uniform shape. Thorough characterization, including ultraviolet–visible (UV–Vis) and Fourier transform infrared (FTIR) spectroscopy investigations, revealed that pH substantially influences surface chemistry and colloidal stability. Additionally, transmission electron microscopy (TEM), field-emission scanning electron microscopy (FESEM), and energy-dispersive X-ray (EDX) investigations conducted at pH = 7 elucidated the shape and elemental content of the nanoparticles. UV–Vis spectroscopy was utilized to examine the optical characteristics and stability of the AuNPs synthesized at different pH levels, demonstrating the impact of pH variations on their bioreduction and stability. Stability evaluations, denoted by coefficient of variation (CV) metrics, demonstrated enhanced performance, with CV values of 6.6%, 7.02%, and 3.8% for pH 4, pH 7, and pH 10, respectively. The findings highlight the considerable influence of pH on the properties of gold nanoparticles and reinforce the importance of pH-controlled synthesis for the production of stable, high-performance AuNP-based sensors. Storing gold nanoparticles at a mildly acidic pH of approximately 6 ensures stability and reduces aggregation, thereby maintaining their optical and functional properties for future applications and offering insights into optimizing EGFET sensor designs for improved sensitivity and stability.

The proton ceramic fuel cell (PCFC) is a cutting-edge technology for achieving carbon-free and efficient energy conversion. It has garnered significant attention in the clean energy sector due to its environmental adaptability and fuel compatibility in the low to medium temperature range of 500 to 700 °C. The intrinsic properties of cathode materials significantly affect the electrochemical performance of PCFC. In this study, a novel Sc-doped La_0.6Sr_0.4CoO_3−δ cathode was designed and synthesized using the sol–gel method, and its electrochemical performance in the PCFC was systematically investigated. Test results under hydrogen fuel conditions demonstrated that the single cell using the La_0.6Sr_0.4Sc_0.4Co_0.6O_3−δ cathode exhibited a respectable power output capability at 700 °C, achieving a peak power density (PPD) of 556 mW cm⁻² and polarization impedance of 0.217 Ω cm². Notably, the cell exhibited a performance degradation rate as low as 0.013% h⁻¹ after 100 h of operation at a constant current discharge of 342 mA cm⁻², with the open-circuit voltage and PPD maintaining 98.5% and 107% of their initial values, respectively. This study provides valuable reference for the design of perovskite cathodes for PCFC.

In this study, lidocaine-tetraphenylborate (LD-TPB) ion-pair was synthesized using lidocaine hydrochloride (LD.HCl) and sodium tetraphenylborate (NaTPB), and a new all-solid-state type polyvinyl chloride (PVC)-membrane lidocaine-selective (LD-selective) potentiometric microsensor was developed by using this ion-pair as ionophore material in the PVC-membrane structure. The potentiometric performance characteristics of the LD-selective microsensor were investigated. The response time of the proposed microsensor was determined as ≤ 12 s, and the detection limit was determined as 5.49 × 10⁻⁷ mol.L⁻¹. The microsensor showed no significant drift in its potentials over seven weeks and showed a Nernstian response with a slope of 59.1 ± 0.7 mV/decade (R²: 0.9995) in the concentration range of 1.0 × 10⁻⁶ to 1.0 × 10⁻¹ mol.L⁻¹ for LD.HCl. It was determined that the microsensor had optimum performance in the pH range of 4.0–7.0. The LD-selective microsensor was successfully used for the potentiometric determination of LD.HCl in pharmaceutical samples. The potentiometric results were statistically compared with the results obtained by the UV–Vis spectroscopy method. The potentiometric results obtained were found to be in good agreement with the results obtained by the UV–Vis spectroscopy method at the 95% confidence level.

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Solid-state electrochemical sensors based on yttria-stabilized zirconia (YSZ) are commonly used in various industrial applications to analyze gaseous media. One of the important industrial tasks is the determination of carbon monoxide content in various gas environments at elevated temperatures. This work describes the preparation and characterization of an amperometric solid electrolyte sensor, which is used to measure the carbon monoxide content in inert gases (nitrogen, argon, and helium) at temperatures ranging from 600 to 700 °C. The sensor exhibited a linear relationship between the limiting current as a sensor reading and carbon monoxide concentration in the gas mixtures analyzed within the range of 1 to 10 vol.% CO. The diffusion coefficients of carbon monoxide in nitrogen, helium, and argon were also assessed using the obtained limiting current values. The dynamic characteristics of the sensor used to measure carbon monoxide content were obtained and confirmed to be highly sensitive, with a fast response and reproducibility in all gas mixtures studied. Therefore, the proposed sensor construction can be utilized for CO analysis at elevated temperatures.

Development of facile and cost-effective methods for the preparation of electrode materials are highly important for commercial energy storage and conversion applications. Herein, we develop a liquid-free synthesis of nickel cobalt oxide (NiCo₂O₄) nanostructures using a simple mixing and pyrolysis of metal salt precursors. The liquid-free synthesized NiCo₂O₄ showed truncated rhombohedral morphology with good crystallinity and uniformity. The NiCo₂O₄ exhibited a maximum specific capacitance of 306.1 F/g at 1 A/g with battery-like redox behaviour with good rate capability. Additionally, the faradaic electrode showed good cycling stability with a capacitance retention of 96.3% after 10,000 charge–discharge cycles. Furthermore, the NiCo₂O₄ nanostructures was used as an electrocatalyst, which showed superior electrocatalytic performance in alkaline electrolyte with a low Tafel slope of 80 mV/dec and reduced charge-transfer resistance. These electrochemical features are attributed to the porous interconnected nanostructures, good electrochemical active sites, and efficient ion/electron transport provided by NiCo₂O₄ electrode. Overall, the dry-synthesis method is scalable, and eliminates hazardous solvents, making it is ideal for large-scale production of electrode materials for next-generation energy storage and conversion applications.