Journal of Electroanalytical Chemistry最新文献

英文中文

Scale-up of a BTX electrochemically assisted reactive absorption 扩大 BTX 电化学辅助反应吸收的规模

IF 4.1 3区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Electroanalytical Chemistry

Pub Date : 2025-02-07 DOI: 10.1016/j.jelechem.2025.118998

Bryan A. Tiban-Anrango, Andrea N. Arias-Sánchez, Justo Lobato, Manuel A. Rodrigo

Electrochemical technologies have proven highly efficient in remediating polluted gas with benzene, toluene, and xylene (BTX). However, their scalability has yet to be explored to determine the best configurations to maintain optimal removals and energetic efficiencies. Here, we report a straightforward scale-up of an electro-absorption process that combines the absorption of BTX in 0.05 M H₂SO₄ (electrolyte) and their electrochemical oxidation in the electrolyte. The electrochemical cell was upsized by stacking eight single-compartment cells, permitting the circulation of the absorbent in series. The results showed the successful removal of BTX from a synthetic gas stream, which increased at high current densities and low gas flow rates. Average removals over 60 % were achieved in the electro-absorption with 50 mA cm⁻². Analysis of the contaminants in the electrolyte confirmed the absorption of BTXs and their electrochemical oxidation by mineralisation, which was enhanced at larger gas flows and current densities. Nevertheless, a comparison of equivalent scaled and baseline systems indicated an inferior current efficiency on the larger scale due to mass transfer inefficiencies, which are affected by circulating the absorbent in series. These findings suggest that the replication of single electrochemical cells (parallel) can optimise the performance of the electro-absorption degradation of BTX at larger scales.

{"title":"Scale-up of a BTX electrochemically assisted reactive absorption","authors":"Bryan A. Tiban-Anrango, Andrea N. Arias-Sánchez, Justo Lobato, Manuel A. Rodrigo","doi":"10.1016/j.jelechem.2025.118998","DOIUrl":"10.1016/j.jelechem.2025.118998","url":null,"abstract":"<div><div>Electrochemical technologies have proven highly efficient in remediating polluted gas with benzene, toluene, and xylene (BTX). However, their scalability has yet to be explored to determine the best configurations to maintain optimal removals and energetic efficiencies. Here, we report a straightforward scale-up of an electro-absorption process that combines the absorption of BTX in 0.05 M H<sub>2</sub>SO<sub>4</sub> (electrolyte) and their electrochemical oxidation in the electrolyte. The electrochemical cell was upsized by stacking eight single-compartment cells, permitting the circulation of the absorbent in series. The results showed the successful removal of BTX from a synthetic gas stream, which increased at high current densities and low gas flow rates. Average removals over 60 % were achieved in the electro-absorption with 50 mA cm<sup>−2</sup>. Analysis of the contaminants in the electrolyte confirmed the absorption of BTXs and their electrochemical oxidation by mineralisation, which was enhanced at larger gas flows and current densities. Nevertheless, a comparison of equivalent scaled and baseline systems indicated an inferior current efficiency on the larger scale due to mass transfer inefficiencies, which are affected by circulating the absorbent in series. These findings suggest that the replication of single electrochemical cells (parallel) can optimise the performance of the electro-absorption degradation of BTX at larger scales.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"981 ","pages":"Article 118998"},"PeriodicalIF":4.1,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143387492","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Determination of membrane PD-L1 by SECM technique based on aptamer identification

IF 4.1 3区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Electroanalytical Chemistry

Pub Date : 2025-02-07 DOI: 10.1016/j.jelechem.2025.118999

Yuying Du, Ziqi Wang, Jiening Wu, Liping Lu

Membrane proteins play crucial roles in cellular activities and are the major actors of bio-membrane functions. Programmed death ligand receptor 1 (PD-L1) is a type of transmembrane protein that is overexpressed on certain tumor cells, leading to the immune escape of cancer cells. Here, a detection method was developed using scanning electrochemical microscopy (SECM) through aptamer-specific recognition and enzyme-catalyzed reaction, which converts the PD-L1 expression into an electrical signal. The aptamer (MJ5C) modified alkaline phosphatase (ALP) can specifically capture PD-L1, and ALP catalyzes the reduction of 4-aminophenyl phosphate (PAPP) to p-aminophenol (PAP), the current response of PAP at SECM tip is positively correlated with the expression of PD-L1 on NCI-H1975 cell. The results showed that this method could real-time detect the expression of PD-L1 on a single cell stimulated by drugs and dibenzothiophene (DBT). Overall, this method provides a new feasible method for the real-time nondestructive detection of single-cell membrane protein expression and a new avenue for studying the effect of pollutants on membrane protein.

{"title":"Determination of membrane PD-L1 by SECM technique based on aptamer identification","authors":"Yuying Du, Ziqi Wang, Jiening Wu, Liping Lu","doi":"10.1016/j.jelechem.2025.118999","DOIUrl":"10.1016/j.jelechem.2025.118999","url":null,"abstract":"<div><div>Membrane proteins play crucial roles in cellular activities and are the major actors of bio-membrane functions. Programmed death ligand receptor 1 (PD-L1) is a type of transmembrane protein that is overexpressed on certain tumor cells, leading to the immune escape of cancer cells. Here, a detection method was developed using scanning electrochemical microscopy (SECM) through aptamer-specific recognition and enzyme-catalyzed reaction, which converts the PD-L1 expression into an electrical signal. The aptamer (MJ5C) modified alkaline phosphatase (ALP) can specifically capture PD-L1, and ALP catalyzes the reduction of 4-aminophenyl phosphate (PAPP) to p-aminophenol (PAP), the current response of PAP at SECM tip is positively correlated with the expression of PD-L1 on NCI-H1975 cell. The results showed that this method could real-time detect the expression of PD-L1 on a single cell stimulated by drugs and dibenzothiophene (DBT). Overall, this method provides a new feasible method for the real-time nondestructive detection of single-cell membrane protein expression and a new avenue for studying the effect of pollutants on membrane protein.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"980 ","pages":"Article 118999"},"PeriodicalIF":4.1,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143372303","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Rapid and sensitive determination of sildenafil citrate by adsorption stripping voltammetry using a solid lead microelectrode

IF 4.1 3区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Electroanalytical Chemistry

Pub Date : 2025-02-07 DOI: 10.1016/j.jelechem.2025.119000

Mateusz Ochab

A solid state lead microelectrode (PbµE), was used for the rapid and sensitive determination of sildenafil citrate (SC) in pharmaceutical formulations by the stripping method. The method involves the accumulation of SC on a solid lead microelectrode with diameter of 25 µm, by an adsorption process. In the stripping step, two well-formed reduction peaks at −1.22 (P₁) and −1.31 V (P₂) were obtained during SC reduction. The calibration curve of SC for 180 s accumulation time was linear in the range from 5 × 10⁻¹⁰ to 2 × 10⁻⁸ mol/L for P₁ and P₂, while the detection limit was 1.8 × 10⁻¹⁰ and 2.4 × 10⁻¹⁰ mol/L, respectively. The solid lead microelectrode demonstrated good repeatability (RSD 4,2% for n = 10), durability for a long period of time and its more eco-friendly as compared to lead film electrodes. The procedure was successfully applied to the determination of SC in a pharmaceutical formulations.

引用次数: 0

Simultaneous determination of serotonin, dopamine, and ascorbic acid at a glassy carbon electrode modified with chitosan-alginate hydrogel and reduced graphene oxide

IF 4.1 3区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Electroanalytical Chemistry

Pub Date : 2025-02-06 DOI: 10.1016/j.jelechem.2025.118992

Katarina S. Postolović , Milan B. Radovanović , Zorka D. Stanić

Detection of biologically active components, such as ascorbic acid, dopamine, and serotonin, is significant from the perspective of biomedicine, particularly in the process of disease diagnosis and in the quality control of commercial pharmaceutical products. In this work, a novel electrochemical sensor was developed by modifying a glassy carbon electrode with a hydrogel composed of a polyelectrolyte complex of alginate and chitosan, along with the addition of electrochemically reduced graphene oxide. This biocompatible sensor was applied for the simultaneous determination of ascorbic acid, dopamine, and serotonin using adsorptive square wave voltammetry. The modified GCE demonstrated an excellent electrochemical response towards the target analytes, thanks to the enhanced adsorption of the analytes on the surface of the electrode, facilitated by favorable interactions between analytes and the modifiers. This approach increased the electrode’s active surface area and ensured excellent electrode response. The sensor exhibited a broad linear range of the anodic current relative to analyte concentration, achieving low detection limits of 0.094 μM, 4.18 nM and 3.23 nM for ascorbic acid, dopamine and serotonin, respectively. Additionally, the proposed sensor exhibited good stability, reproducibility of results, selectivity, as well as effectiveness, in the determination of target biological compounds in real sample matrices.

{"title":"Simultaneous determination of serotonin, dopamine, and ascorbic acid at a glassy carbon electrode modified with chitosan-alginate hydrogel and reduced graphene oxide","authors":"Katarina S. Postolović , Milan B. Radovanović , Zorka D. Stanić","doi":"10.1016/j.jelechem.2025.118992","DOIUrl":"10.1016/j.jelechem.2025.118992","url":null,"abstract":"<div><div>Detection of biologically active components, such as ascorbic acid, dopamine, and serotonin, is significant from the perspective of biomedicine, particularly in the process of disease diagnosis and in the quality control of commercial pharmaceutical products. In this work, a novel electrochemical sensor was developed by modifying a glassy carbon electrode with a hydrogel composed of a polyelectrolyte complex of alginate and chitosan, along with the addition of electrochemically reduced graphene oxide. This biocompatible sensor was applied for the simultaneous determination of ascorbic acid, dopamine, and serotonin using adsorptive square wave voltammetry. The modified GCE demonstrated an excellent electrochemical response towards the target analytes, thanks to the enhanced adsorption of the analytes on the surface of the electrode, facilitated by favorable interactions between analytes and the modifiers. This approach increased the electrode’s active surface area and ensured excellent electrode response. The sensor exhibited a broad linear range of the anodic current relative to analyte concentration, achieving low detection limits of 0.094 μM, 4.18 nM and 3.23 nM for ascorbic acid, dopamine and serotonin, respectively. Additionally, the proposed sensor exhibited good stability, reproducibility of results, selectivity, as well as effectiveness, in the determination of target biological compounds in real sample matrices.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"980 ","pages":"Article 118992"},"PeriodicalIF":4.1,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143377218","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Imidazolyl ionic liquid-derived nitrogen-doped carbon layer coated Fe3O4 loaded on graphene as an advanced host for long life lithium sulfur batteries

IF 4.1 3区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Electroanalytical Chemistry

Pub Date : 2025-02-06 DOI: 10.1016/j.jelechem.2025.118997

Yonghui Li , Guihong Gao , Tian Han , Jingjing Ruan , Shenshen Li , Hailin Fan , Ziqiang Niu , Tongfei Wang , Shengjie Liang , Feng Huo

Lithium-sulfur batteries are regarded as promising alternatives for next-generation energy storage systems. Developing high-performance lithium-sulfur battery cathode materials requires the efficient synthesis of electrocatalysts that can both anchor LiPS and catalyze their conversion. Herein, we synthesized a composite of ionic liquid-derived nitrogen-doped carbon-coated Fe₃O₄ loaded on graphene (Fe₃O₄@NC/G) by utlizing the π-π interaction between [Bmim][FeCl₄] and graphene. Fe³⁺ ions were uniformly dispersed, effectively preventing particle aggregation during the carbonization process and producing Fe₃O₄ nanoparticles averaging 20.64 nm in size. This structure provides plentiful active sites for adsorbing and catalyzing LiPS, thereby accelerating the redox reaction. Additionally, the nitrogen-doped carbon coating not only stabilizes the Fe₃O₄ nanoparticles and firmly anchors them to the graphene nanosheets, significantly enhancing structural integrity, but also increases the adsorption of LiPS due to the introduction of the heteroatom nitrogen. The assembled LSBs demonstrated excellent cyclic stability with a capacity fade rate of 0.35 % per cycle over 1200 cycles at 1C.

{"title":"Imidazolyl ionic liquid-derived nitrogen-doped carbon layer coated Fe3O4 loaded on graphene as an advanced host for long life lithium sulfur batteries","authors":"Yonghui Li , Guihong Gao , Tian Han , Jingjing Ruan , Shenshen Li , Hailin Fan , Ziqiang Niu , Tongfei Wang , Shengjie Liang , Feng Huo","doi":"10.1016/j.jelechem.2025.118997","DOIUrl":"10.1016/j.jelechem.2025.118997","url":null,"abstract":"<div><div>Lithium-sulfur batteries are regarded as promising alternatives for next-generation energy storage systems. Developing high-performance lithium-sulfur battery cathode materials requires the efficient synthesis of electrocatalysts that can both anchor LiPS and catalyze their conversion. Herein, we synthesized a composite of ionic liquid-derived nitrogen-doped carbon-coated Fe<sub>3</sub>O<sub>4</sub> loaded on graphene (Fe<sub>3</sub>O<sub>4</sub>@NC/G) by utlizing the π-π interaction between [Bmim][FeCl<sub>4</sub>] and graphene. Fe<sup>3+</sup> ions were uniformly dispersed, effectively preventing particle aggregation during the carbonization process and producing Fe<sub>3</sub>O<sub>4</sub> nanoparticles averaging 20.64 nm in size. This structure provides plentiful active sites for adsorbing and catalyzing LiPS, thereby accelerating the redox reaction. Additionally, the nitrogen-doped carbon coating not only stabilizes the Fe<sub>3</sub>O<sub>4</sub> nanoparticles and firmly anchors them to the graphene nanosheets, significantly enhancing structural integrity, but also increases the adsorption of LiPS due to the introduction of the heteroatom nitrogen. The assembled LSBs demonstrated excellent cyclic stability with a capacity fade rate of 0.35 % per cycle over 1200 cycles at 1C.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"981 ","pages":"Article 118997"},"PeriodicalIF":4.1,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143395935","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High-valent metal molybdenum-doped NiFe LDH nanosheet for efficient oxygen evolution reaction

IF 4.1 3区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Electroanalytical Chemistry

Pub Date : 2025-02-05 DOI: 10.1016/j.jelechem.2025.118996

Xingyue Tang , Yingying Li , Xinling Jiang , Hao Li , Yijing Wang , Xiaolian Wang

Due to its unique layered structure and excellent stability, NiFe layered double hydroxide (NiFe LDH) is considered to be a promising catalyst for oxygen evolution reaction (OER). However, its OER performance is still limited by slow kinetics and poor conductivity. Reasonable design of multiple types of active sites has been proved to be an effective means to optimize the OER performance of NiFe LDH. In this study, a defective high-valence metal molybdenum (Mo) doped NiFe LDH electrocatalyst was designed to adjust the electronic structure and generate multiple types of active sites. NiFe LDH was used as the precursor of OER catalyst, and the high-valent metal Mo was introduced by electrodeposition. The electrodeposition process was optimized by adjusting the amount of Mo introduced and the electrodeposition time. A dandelion-like nickel–iron-molybdenum layered double hydroxide nanosheet/nickel foam (NiFeMo LDH/NF) electrocatalyst was designed using nickel foam (NF) as a self-supporting electrode. When the deposition time is 2400 s, the prepared NiFeMo LDH/NF-2400 s has a large electrochemical active area and a dense pore structure, with overpotentials of 220 and 280 mV at 10 and 50 mA cm⁻², respectively, showing excellent OER activity. Its stability is good, and it remains stable under 1.0 M KOH for 100 h of continuous operation. The results indicate that Mo doping can not only regulate the electronic structure of transition metals, and promote the generation of active sites, but also contributes to the transfer of electrons between the interfaces, thereby improving OER performance.

{"title":"High-valent metal molybdenum-doped NiFe LDH nanosheet for efficient oxygen evolution reaction","authors":"Xingyue Tang , Yingying Li , Xinling Jiang , Hao Li , Yijing Wang , Xiaolian Wang","doi":"10.1016/j.jelechem.2025.118996","DOIUrl":"10.1016/j.jelechem.2025.118996","url":null,"abstract":"<div><div>Due to its unique layered structure and excellent stability, NiFe layered double hydroxide (NiFe LDH) is considered to be a promising catalyst for oxygen evolution reaction (OER). However, its OER performance is still limited by slow kinetics and poor conductivity. Reasonable design of multiple types of active sites has been proved to be an effective means to optimize the OER performance of NiFe LDH. In this study, a defective high-valence metal molybdenum (Mo) doped NiFe LDH electrocatalyst was designed to adjust the electronic structure and generate multiple types of active sites. NiFe LDH was used as the precursor of OER catalyst, and the high-valent metal Mo was introduced by electrodeposition. The electrodeposition process was optimized by adjusting the amount of Mo introduced and the electrodeposition time. A dandelion-like nickel–iron-molybdenum layered double hydroxide nanosheet/nickel foam (NiFeMo LDH/NF) electrocatalyst was designed using nickel foam (NF) as a self-supporting electrode. When the deposition time is 2400 s, the prepared NiFeMo LDH/NF-2400 s has a large electrochemical active area and a dense pore structure, with overpotentials of 220 and 280 mV at 10 and 50 mA cm<sup>−2</sup>, respectively, showing excellent OER activity. Its stability is good, andit remains stable under 1.0 M KOH for 100 h of continuous operation. The results indicate that Mo doping can not only regulate the electronic structure of transition metals, andpromote the generation of active sites, but also contributes to the transfer of electrons between the interfaces, thereby improving OER performance.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"982 ","pages":"Article 118996"},"PeriodicalIF":4.1,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143420888","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

3D layer shape electrode of NiS in-situ growth on shaddock peel derived carbon for high-performance supercapacitors

IF 4.1 3区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Electroanalytical Chemistry

Pub Date : 2025-02-05 DOI: 10.1016/j.jelechem.2025.118995

Yongda Tan, Yongfa Long, Zhentao Liu, Linsong Li, Huixin Jin, Meilong Wang

Transition metal sulfide has excellent high electrical conductivity and excellent electrochemical activity. However, the use of transition metal sulfides as electrode materials still have two disadvantages. On one hand, their kinetic performance in redox reactions is poor. On the other hand, the Faraday redox reaction only occurs on the upper surface of the electrode material, and the short diffusion distance of the electrode into which the electrolyte enters makes it difficult to participate in the electrochemical charge storage inside the electrode, resulting in low energy density. Porous carbon has various pore structures and a large specific surface area. In addition, its surface possesses rich oxygen-containing active substances, which can enhance wettability. The addition of porous carbon to the sulfide can greatly improve its energy density. Hence, in this paper, a 5-SPC@NiS (NiS is grown in situ on grapefruit peel-derived carbon with a mass fraction of 5 %) with a layered sheet structure was synthesized by hydrothermal method, the specific capacitance of 5-SPC@NiS is as high as 1911 F g⁻¹ at 0.5 A g⁻¹. It also shows excellent electrochemical performance in practical applications, with an energy density of 14.6 Wh kg⁻¹ (supercapacitor) and 31.3 Wh kg⁻¹ (zinc ion battery). Overall, it provides a new solution to the energy challenges.

{"title":"3D layer shape electrode of NiS in-situ growth on shaddock peel derived carbon for high-performance supercapacitors","authors":"Yongda Tan, Yongfa Long, Zhentao Liu, Linsong Li, Huixin Jin, Meilong Wang","doi":"10.1016/j.jelechem.2025.118995","DOIUrl":"10.1016/j.jelechem.2025.118995","url":null,"abstract":"<div><div>Transition metal sulfide has excellent high electrical conductivity and excellent electrochemical activity. However, the use of transition metal sulfides as electrode materials still have two disadvantages. On one hand, their kinetic performance in redox reactions is poor. On the other hand, the Faraday redox reaction only occurs on the upper surface of the electrode material, and the short diffusion distance of the electrode into which the electrolyte enters makes it difficult to participate in the electrochemical charge storage inside the electrode, resulting in low energy density. Porous carbon has various pore structures and a large specific surface area. In addition, its surface possesses rich oxygen-containing active substances, which can enhance wettability. The addition of porous carbon to the sulfide can greatly improve its energy density. Hence, in this paper, a 5-SPC@NiS (NiS is grown in situ on grapefruit peel-derived carbon with a mass fraction of 5 %) with a layered sheet structure was synthesized by hydrothermal method, the specific capacitance of 5-SPC@NiS is as high as 1911 F g<sup>−1</sup> at 0.5 A g<sup>−1</sup>. It also shows excellent electrochemical performance in practical applications, with an energy density of 14.6 Wh kg<sup>−1</sup> (supercapacitor) and 31.3 Wh kg<sup>−1</sup> (zinc ion battery). Overall, it provides a new solution to the energy challenges.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"980 ","pages":"Article 118995"},"PeriodicalIF":4.1,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143349806","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

From acorn to microporous carbon for sustainable sodium-ion battery

IF 4.1 3区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Electroanalytical Chemistry

Pub Date : 2025-02-04 DOI: 10.1016/j.jelechem.2025.118988

Alejandro Medina , Saúl Rubio , Pedro Lavela , José L. Tirado , R. Alcántara

To promote a sustainable economy, developing sodium-ion batteries with carbon electrodes derived from biomass can be advantageous. This study focuses on carbon prepared from acorn nuts through carbonization at temperatures ranging from 700 to 1000 °C. The method also involves treatment with sulfuric acid. The porosity of the carbon can be adjusted to optimize its electrochemical performance. To characterize the surface properties, both nitrogen adsorption and carbon dioxide adsorption methods are employed. The impact of latent (closed) pores and external (open) porosity on electrochemistry is also discussed, along with the use of various electrolyte solutions. The article emphasizes the tailoring of biomass-derived carbon for the development of sustainable batteries, particularly the porosity.

引用次数: 0

Effect of different conductive carbons on degradation mechanism of flake-shaped silicon anodes: Analysis using dynamic relaxation time distribution method

IF 4.1 3区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Electroanalytical Chemistry

Pub Date : 2025-02-04 DOI: 10.1016/j.jelechem.2025.118987

Changyu Yao , Hanyang Gao , Li Li , Jiahao Jiang , Guoxin Hu

The conductive agent is a bridge between the collector and the active material as well as the active material itself, and is an integral part of the silicon-based anode in lithium-ion batteries due to the low intrinsic conductivity of silicon. In previous studies, spherical silicon (dots) has been combined with 0-dimensional (dots), 1-dimensional (lines), and 2-dimensional (surfaces) conductive agents, and it has been found that the contact between the active material and the conductive agent is the key to the electrochemical performance. Flake-shaped silicon has different structural characteristics from spherical silicon, and it tends to be face-to-face stacked, which greatly limits its original performance, so the selection of suitable conductive agent or compounding method is crucial for the performance enhancement of flake-shaped silicon anode. In this experiment, three typical conductive agents with different dimensions, Super P, carbon nanotubes and graphene, were mixed with flake-shaped silicon respectively, and the different morphologies of the conductive agents bonded with flake-shaped silicon in different forms, which are reflected in the structural parameters such as tortuosity, pore size distribution, specific surface area and porosity of the electrode. We disassembled and subdivided the different impedances in the EIS data using the DRT method to explore the changes of different electrochemical processes in the cell cycling degradation, and analysed the effects of the above structural parameters on the cycling changes of R_s, R_sei, R_ct, and D_Li⁺.

{"title":"Effect of different conductive carbons on degradation mechanism of flake-shaped silicon anodes: Analysis using dynamic relaxation time distribution method","authors":"Changyu Yao , Hanyang Gao , Li Li , Jiahao Jiang , Guoxin Hu","doi":"10.1016/j.jelechem.2025.118987","DOIUrl":"10.1016/j.jelechem.2025.118987","url":null,"abstract":"<div><div>The conductive agent is a bridge between the collector and the active material as well as the active material itself, and is an integral part of the silicon-based anode in lithium-ion batteries due to the low intrinsic conductivity of silicon. In previous studies, spherical silicon (dots) has been combined with 0-dimensional (dots), 1-dimensional (lines), and 2-dimensional (surfaces) conductive agents, and it has been found that the contact between the active material and the conductive agent is the key to the electrochemical performance. Flake-shaped silicon has different structural characteristics from spherical silicon, and it tends to be face-to-face stacked, which greatly limits its original performance, so the selection of suitable conductive agent or compounding method is crucial for the performance enhancement of flake-shaped silicon anode. In this experiment, three typical conductive agents with different dimensions, Super P, carbon nanotubes and graphene, were mixed with flake-shaped silicon respectively, and the different morphologies of the conductive agents bonded with flake-shaped silicon in different forms, which are reflected in the structural parameters such as tortuosity, pore size distribution, specific surface area and porosity of the electrode. We disassembled and subdivided the different impedances in the EIS data using the DRT method to explore the changes of different electrochemical processes in the cell cycling degradation, and analysed the effects of the above structural parameters on the cycling changes of R<sub>s</sub>, R<sub>sei</sub>, R<sub>ct</sub>, and D<sub>Li</sub><sup>+</sup>.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"980 ","pages":"Article 118987"},"PeriodicalIF":4.1,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143377305","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Platinum-nickel bimetallic nanowire electrocatalyst enables methanol oxidation

IF 4.1 3区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Electroanalytical Chemistry

Pub Date : 2025-02-04 DOI: 10.1016/j.jelechem.2025.118989

Zongze Li , Kedi Yu , Yumin Leng , Zhengbo Chen

The direct methanol fuel cells (DMFCs) stand out among various types of fuel cells due to their advantages of pollution-free operation, rational design, and high energy density. However, the development of methanol fuel cells faces several obstacles. Platinum-based catalysts are considered the most promising type of catalyst for electrochemical methanol oxidation reaction (MOR), yet they are limited by issues inherent to commercial platinum–carbon (Pt/C) catalysts, including high platinum content, low activity, rapid deactivation, and susceptibility to poisoning, all of which restrict their practical applications in methanol oxidation cells. Based on the platinum-based metal system, this study explores a platinum-nickel (PtNi) bimetallic nanomaterial with a nanowire microstructure as an alternative catalyst for MOR. The PtNi nanowires possess more active sites and exhibit synergistic effects, thereby enhancing catalytic performance.

引用次数: 0

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