Electrocatalysis最新文献

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Voltammetric Sensor for Simultaneous Determination of Ponceau 4R, Amaranth, and Tartrazine as Additives in Foodstuffs
IF 2.7 4区 化学
Electrocatalysis Pub Date : 2025-03-03 DOI: 10.1007/s12678-025-00936-8
Hanieh Ghanbari, Mansour Arab Chamjangali, Mohammad Faraji
{"title":"Voltammetric Sensor for Simultaneous Determination of Ponceau 4R, Amaranth, and Tartrazine as Additives in Foodstuffs","authors":"Hanieh Ghanbari,&nbsp;Mansour Arab Chamjangali,&nbsp;Mohammad Faraji","doi":"10.1007/s12678-025-00936-8","DOIUrl":"10.1007/s12678-025-00936-8","url":null,"abstract":"<div><p>Simultaneous electrochemical determination of three synthetic additive dyes (ponceau 4R (PON), its isomer amaranth (AMA), and tartrazine (TAR)) was performed with an electrochemical sensor based on a poly-sunset yellow and multi-walled carbon nanotube. In this work, sunset yellow was polymerized with a novel electropolymerization process. Field Emission Scanning Electron Microscopy (FESEM) demonstrates that the surface of the MWCNTs is covered with the sunset yellow polymer layer. The electrochemical activity of the sensor was verified by electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV), and chronoamperometry. Under the optimized experimental conditions, the electrochemical determination of the PON, AMA, and TAR was carried out using differential-pulse voltammetry (DPV). The results showed low detection limits (LOD) of 0.11, 0.21, and 0.12 µM for PON, AMA, and TAR, respectively, with a linear range of 0.50–30.0 µM. The capability of the developed sensor for routine analysis of the real samples was demonstrated by the determination of PON, the AMA, and TAR in jelly-belly candy, jelly, and tap water.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":535,"journal":{"name":"Electrocatalysis","volume":"16 3","pages":"587 - 599"},"PeriodicalIF":2.7,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143840263","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
The Design of Cobalt (II)-Porphyrin/Fe2O3-Reduced Graphene Oxide Nanohybrid for Enhanced Electrochemical Sensing of 4-Hydroxybenzoic Acid
IF 2.7 4区 化学
Electrocatalysis Pub Date : 2025-02-28 DOI: 10.1007/s12678-025-00944-8
Teboho Edwin Mpakanyane, Nnamdi Nwahara, Mbulelo Jokazi, Tebello Nyokong
{"title":"The Design of Cobalt (II)-Porphyrin/Fe2O3-Reduced Graphene Oxide Nanohybrid for Enhanced Electrochemical Sensing of 4-Hydroxybenzoic Acid","authors":"Teboho Edwin Mpakanyane,&nbsp;Nnamdi Nwahara,&nbsp;Mbulelo Jokazi,&nbsp;Tebello Nyokong","doi":"10.1007/s12678-025-00944-8","DOIUrl":"10.1007/s12678-025-00944-8","url":null,"abstract":"<div><p>This study presents the synthesis and characterization of a novel electrocatalyst based on cobalt (II)-tetra aminophenyl porphyrin (CoTAPor) conjugated non-covalently with an iron (III) oxide-reduced graphene oxide (Fe<sub>2</sub>O<sub>3</sub>rGO). The synthesized materials were then used to modify a glassy carbon electrode (GCE), with CoTAPor-Fe<sub>2</sub>O<sub>3</sub>rGO identified as the superior electrocatalyst. The electrochemical detection of 4-hydroxybenzoic acid (<i>p</i>HBA) was performed on the CoTAPor- Fe<sub>2</sub>O<sub>3</sub>rGO-modified GCE using cyclic voltammetry (CV) and chronoamperometry (CA). The CoTAPor-Fe<sub>2</sub>O<sub>3</sub>rGO composite exhibited the best catalytic performance, showing a significantly higher current response compared to bare GCE, CoTAPor, and Fe<sub>2</sub>O<sub>3</sub>rGO individually under CV and CA. This enhanced performance is attributed to the synergistic interactions between CoTAPor and Fe<sub>2</sub>O<sub>3</sub>rGO, resulting in increased sensitivity and a lower limit of detection (LoD). For CoTAPor-Fe<sub>2</sub>O<sub>3</sub>rGO, the sensitivity was 0.761 µA µM<sup>−1</sup>, with a LoD of 1.18 µM (S/N = 3). In addition, the electrocatalyst demonstrated good selectivity for <i>p</i>HBA in the presence of potentially interfering substances under controlled experimental conditions.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":535,"journal":{"name":"Electrocatalysis","volume":"16 3","pages":"569 - 586"},"PeriodicalIF":2.7,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s12678-025-00944-8.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143840509","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Analytical Approach for Degradation of Pollutants via Photocatalytic Response of Graphite Intercalated SnO2 Nanophotocatalysts
IF 2.7 4区 化学
Electrocatalysis Pub Date : 2025-02-24 DOI: 10.1007/s12678-025-00938-6
Ashish Kumar, Deepika Maan, Karishma Jain, Harish Kumar Meena, Garima Agarwal, Sushil Kumar Jain, Reena Verma, Balram Tripathi
{"title":"Analytical Approach for Degradation of Pollutants via Photocatalytic Response of Graphite Intercalated SnO2 Nanophotocatalysts","authors":"Ashish Kumar,&nbsp;Deepika Maan,&nbsp;Karishma Jain,&nbsp;Harish Kumar Meena,&nbsp;Garima Agarwal,&nbsp;Sushil Kumar Jain,&nbsp;Reena Verma,&nbsp;Balram Tripathi","doi":"10.1007/s12678-025-00938-6","DOIUrl":"10.1007/s12678-025-00938-6","url":null,"abstract":"<div><p>In this study, we are reporting the reaction mechanism for the photocatalytic response of graphite (Gr) intercalated tin oxide (SnO<sub>2</sub>) nanophotocatalysts. These nanocomposites were prepared using sonication method and characterized by using X-ray diffractometer (XRD), scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX), UV–Vis spectroscopy, photoluminescence (PL) spectroscopy, and Fourier transform infrared (FT-IR) spectroscopy. The XRD spectra confirmed average crystallite size of the order of 29 nm and the XRD patterns showed the presence of the tetragonal structure. Crystallite size was calculated using Debye–Scherrer’s and Williamson-Hall (WH) equations. The degradation of dye and photocatalytic response were optimized with tuning of various parameters such as ppm level of adsorbate and time response.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":535,"journal":{"name":"Electrocatalysis","volume":"16 3","pages":"558 - 568"},"PeriodicalIF":2.7,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143840317","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Detection and Separation of Paracetamol and p-Aminophenol Using Activated Glassy Carbon Electrodes 使用活性玻璃碳电极检测和分离扑热息痛和对氨基苯酚
IF 2.7 4区 化学
Electrocatalysis Pub Date : 2025-02-19 DOI: 10.1007/s12678-025-00941-x
Dereje Yenealem, Shimelis Admassie, Santhi Raju Pilli, Sowjanya Motana, Dessie Tibebe
{"title":"Detection and Separation of Paracetamol and p-Aminophenol Using Activated Glassy Carbon Electrodes","authors":"Dereje Yenealem,&nbsp;Shimelis Admassie,&nbsp;Santhi Raju Pilli,&nbsp;Sowjanya Motana,&nbsp;Dessie Tibebe","doi":"10.1007/s12678-025-00941-x","DOIUrl":"10.1007/s12678-025-00941-x","url":null,"abstract":"<div><p>The square wave voltammetry (SWV) method was utilized to simultaneously find paracetamol and p-aminophenol (PAP) by applying an activated glassy carbon electrode (AGCE). The results showed that the AGCE effectively facilitated the oxidation of both compounds, exhibiting a significant separation of their oxidation peaks by approximately 280.5 mV, which is sufficient for their concurrent detection. The linear ranges and detection limits were found to be 6.0 × 10<sup>−7</sup>–1.0 × 10<sup>−4</sup> mol L<sup>−1</sup> and 1.0 × 10<sup>−6</sup>–8.0 × 10<sup>−4</sup> mol L<sup>−1</sup>; 1.39 × 10<sup><i>−</i>8</sup> mol L<sup>−1</sup> and 1.91 × 10<sup><i>−</i>8</sup> mol L<sup><i>−</i>1</sup> for APAP and PAP, correspondingly. Ultimately, the adopted method was effectively implemented to measure APAP and PAP in commercial-grade tablets, yielding average recoveries of 103.1% for APAP and 101.0% for PAP.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":535,"journal":{"name":"Electrocatalysis","volume":"16 3","pages":"548 - 557"},"PeriodicalIF":2.7,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143840437","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Assessment of a New Epoxy Resin for Corrosion Prevention of Mild Steel in HCl Environment: Experimental and Theoretical Analyses
IF 2.7 4区 化学
Electrocatalysis Pub Date : 2025-02-17 DOI: 10.1007/s12678-025-00933-x
Abdeslam El Amri, Naoual El-Aouni, Omar Dagdag, Abdelhay El Amri, Ihamdane Rachid, Avni Berisha, Hansang Kim, Rajesh Haldhar, Mohamed Rafik, W. B. Wan Nik, Mohamed Ebn Touhami, Nadia Dkhireche
{"title":"Assessment of a New Epoxy Resin for Corrosion Prevention of Mild Steel in HCl Environment: Experimental and Theoretical Analyses","authors":"Abdeslam El Amri,&nbsp;Naoual El-Aouni,&nbsp;Omar Dagdag,&nbsp;Abdelhay El Amri,&nbsp;Ihamdane Rachid,&nbsp;Avni Berisha,&nbsp;Hansang Kim,&nbsp;Rajesh Haldhar,&nbsp;Mohamed Rafik,&nbsp;W. B. Wan Nik,&nbsp;Mohamed Ebn Touhami,&nbsp;Nadia Dkhireche","doi":"10.1007/s12678-025-00933-x","DOIUrl":"10.1007/s12678-025-00933-x","url":null,"abstract":"<div><p>In this work, we investigate whether bisphenol S tetraglycidyl ether dianiline dipropoxy (TGEDADPDS) can mitigate mild steel (MS) corrosion. One material that is well-known for its exceptional mechanical qualities as well as its affordability is TGEDADPDS. However, because of its susceptibility to corrosion, particularly in environments containing hydrochloric acid (HCl), corrosion inhibitor research is necessary. Several investigation methods, including surface analysis along with electrochemical testing, were used to assess how well TGEDADPDS inhibited a particular process. The results indicate that, in a 1.0 M HCl medium at 298 K, the optimal concentration of TGEDADPDS is 10<sup>−3</sup> M. As measured by electrochemical impedance spectroscopy (EIS) and potentiodynamic plot (PDP), this concentration has an inhibitory efficiency of 97% and 96%, respectively. Following the Langmuir isotherm, the TGEDADPDS molecule demonstrated exothermic adsorption on MS. By preventing anodic and cathodic reactions, the adsorption technique known as chemisorption dramatically lowers mild steel corrosion. The adsorption process is defined by a Δ<i>G</i><sub>ads</sub> value of − 48.43 kJ/mol. Furthermore, scanning electron microscopy–energy-dispersive spectroscopy surface examination verified that a protective TGEDADPDS coating had formed on the electrode surface, which significantly decreased metal dissolution in the presence of hostile ions. Density-functional theory and Monte Carlo, along with molecular dynamics simulations, are used in the study’s theoretical calculations.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":535,"journal":{"name":"Electrocatalysis","volume":"16 3","pages":"526 - 547"},"PeriodicalIF":2.7,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s12678-025-00933-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143840436","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Influence of Acetonitrile on Cu Electrochemical Nucleation and Growth: Preliminary Test of Catalytic Activity for eCO2RR 乙腈对铜电化学成核和生长的影响:eCO2RR 催化活性的初步测试
IF 2.7 4区 化学
Electrocatalysis Pub Date : 2025-02-14 DOI: 10.1007/s12678-025-00940-y
Akbayan Bekey, Florence Vacandio, Khaisa Avchukir
{"title":"Influence of Acetonitrile on Cu Electrochemical Nucleation and Growth: Preliminary Test of Catalytic Activity for eCO2RR","authors":"Akbayan Bekey,&nbsp;Florence Vacandio,&nbsp;Khaisa Avchukir","doi":"10.1007/s12678-025-00940-y","DOIUrl":"10.1007/s12678-025-00940-y","url":null,"abstract":"<div><p>In this study, the nucleation and growth mechanisms of copper on a glassy carbon (GC) electrode from mixed acetonitrile–water (AN/H<sub>2</sub>O) solutions were investigated using cyclic voltammetry (CV), chronoamperometry (CA) and scanning electron microscopy (SEM). The mechanism of copper nucleation in the AN and 70:30 AN/H<sub>2</sub>O solutions is progressive, whereas for the 50:50, 60:40 and 80:20 AN/H<sub>2</sub>O solutions, it is close to the mixed mechanism. The nucleation parameters, including the nucleation rate, nucleation density and average radius of active nuclei centres, were calculated using a three-dimensional electrochemical nucleation model developed by Scharifker-Hills, in accordance with the identified mechanism. The experimental results demonstrated that the average radius of electrodeposited particles could be reduced from 10.8 to 3.2 µm by shifting the applied potential to the negative region, from −0.43 to −0.48 V in a solution of 0.01 M CuCl<sub>2</sub> + 0.5 NaClO<sub>4</sub> + 70:30 AN/H<sub>2</sub>O. SEM images of the obtained coatings demonstrated the formation of uniformly distributed “monanthes-like” structures of copper particles. The catalytic activity of the Cu electrocatalysts were determined by cyclic voltammetry (CV), linear sweep voltammetry (LSV) and electrochemical impedance spectroscopy (EIS) methods in a 0.5 M NaHCO<sub>3</sub> solution saturated with CO<sub>2</sub> under bulk electrolysis conditions. LSV shows that the Cu catalyst electrodeposited from 50:50 AN/H<sub>2</sub>O mixture exhibited the best performance for electrochemical CO<sub>2</sub> reduction reaction (eCO<sub>2</sub>RR) with a Tafel slope of 168 mV dec<sup>−1</sup>, exchange current density of 6.81 <span>(times)</span> 10<sup>−4</sup> A cm<sup>−2</sup> and charge transfer resistance of 9.4 Ω cm<sup>2</sup>. This study may provide an economical approach for developing low-cost and efficient copper-based electrocatalysts for CO<sub>2</sub> electroreduction.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":535,"journal":{"name":"Electrocatalysis","volume":"16 3","pages":"513 - 525"},"PeriodicalIF":2.7,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143840439","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Synthesis of Nickel-Manganese Spinel Oxide Supported on Carbon-Felt Surface to Enhance Electrochemical Capacitor Performance
IF 2.7 4区 化学
Electrocatalysis Pub Date : 2025-02-13 DOI: 10.1007/s12678-025-00932-y
Mahmoud A. Hefnawy, Rewaida Abdel-Gaber, Sobhi M. Gomha, Magdi E. A. Zaki, Shymaa S. Medany
{"title":"Synthesis of Nickel-Manganese Spinel Oxide Supported on Carbon-Felt Surface to Enhance Electrochemical Capacitor Performance","authors":"Mahmoud A. Hefnawy,&nbsp;Rewaida Abdel-Gaber,&nbsp;Sobhi M. Gomha,&nbsp;Magdi E. A. Zaki,&nbsp;Shymaa S. Medany","doi":"10.1007/s12678-025-00932-y","DOIUrl":"10.1007/s12678-025-00932-y","url":null,"abstract":"<div><p>Energy storage has become an essential need for today’s applications. Thus, the development of capacitors and their materials has gotten great attention. In this study, a high mass loading (2 mg cm<sup>−2</sup>) NiMn<sub>2</sub>O<sub>4</sub>/carbon felt (CF-NMO) was fabricated using a hydrothermal process and used as a new material for a pseudo-capacitive electrode having a potential window of 0.65 V. Several analytical techniques were employed to confirm the structure, such as X-ray diffraction (XRD), and X-ray photon spectroscopy (XPS). The spinel oxide distribution and surface morphology were studied using scanning electron microscopy (SEM), and transmitted electron microscopy (TEM). The activity of the modified CF-NMO was investigated in 1.0 M NaOH. The prepared electrode reached a capacitance of 301 F g<sup>−1</sup> at the current density of 1 mA g<sup>−1</sup>. Furthermore, the electrode’s durability was investigated for 2000 cycles at 5 mA g<sup>−1</sup>, and the provided capacitance retention was ~ 85% compared to the 1st cycle. Also, the rate capability was estimated to be 69% in the current range from 1 to 5 mA cm<sup>−2</sup>.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":535,"journal":{"name":"Electrocatalysis","volume":"16 3","pages":"500 - 512"},"PeriodicalIF":2.7,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143840378","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Ethanol Electrolysis at Carbon-Supported PtRhSn, PtRhNi, and PtRhRu Ternary Alloy Nanoparticles in a Proton Exchange Membrane Cell
IF 2.7 4区 化学
Electrocatalysis Pub Date : 2025-02-12 DOI: 10.1007/s12678-025-00939-5
Ahmed Hashem Ali, Peter G. Pickup
{"title":"Ethanol Electrolysis at Carbon-Supported PtRhSn, PtRhNi, and PtRhRu Ternary Alloy Nanoparticles in a Proton Exchange Membrane Cell","authors":"Ahmed Hashem Ali,&nbsp;Peter G. Pickup","doi":"10.1007/s12678-025-00939-5","DOIUrl":"10.1007/s12678-025-00939-5","url":null,"abstract":"<div><p>Electrolysis of ethanol to produce green hydrogen, with less electrical energy than for water electrolysis, is potentially an attractive sustainable energy technology. However, more efficient anode catalysts are required, and the production of acetic acid and acetaldehyde by-products must be considered. PtRhM (M = Sn, Ni, Ru) catalysts can potentially combine the high activities of PtM catalysts with the enhanced selectivity of PtRh for breaking the ethanol C–C bond, which increases hydrogen production. The purpose of this work was to compare these catalysts in a proton exchange membrane (PEM) cell and measure stoichiometries and product distributions. The results show that although Sn, Ni, and Ru all enhance the activity of PtRh at low potentials for cyclic voltammetry in H<sub>2</sub>SO<sub>4</sub>(aq), only Ru had a significant effect in the PEM cell. However, Ni enhanced selectivity for breaking the C–C bond, while Ru and Sn both decreased selectivity. Consequently, PtRhNi appears to be most suitable for production of hydrogen from ethanol oxidation, because it provides the optimum balance between the electrical energy required, current density, and hydrogen/ethanol ratio (higher stoichiometry).</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":535,"journal":{"name":"Electrocatalysis","volume":"16 3","pages":"490 - 499"},"PeriodicalIF":2.7,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143840307","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 Highly Sensitive of Amperometric Ammonia Sensor Using Green Synthesized CuO Nanoparticles as Anode Material
IF 2.7 4区 化学
Electrocatalysis Pub Date : 2025-02-11 DOI: 10.1007/s12678-025-00937-7
S. Nithya, Atanu Dutta
{"title":"Rapid and Highly Sensitive of Amperometric Ammonia Sensor Using Green Synthesized CuO Nanoparticles as Anode Material","authors":"S. Nithya,&nbsp;Atanu Dutta","doi":"10.1007/s12678-025-00937-7","DOIUrl":"10.1007/s12678-025-00937-7","url":null,"abstract":"<div><p>In modern era, air pollution arises from various human activities and natural processes. Several studies have revealed that automobile exhaust monitoring sensors are indispensable tools for ensuring compliance with emissions regulations, protecting public health, reducing environmental impact, optimizing engine performance, and facilitating diagnostic and maintenance activities in the automotive industry. This study introduces a green synthesis of pure CuO using <i>Calotropis giantea</i> (CG) leaf extract. The synthesized CuO with CG leaf extract was characterized through numerous analytical techniques to understand the basic properties of the synthesized material. The novelty of this work lies in the fabrication of the electrode material of CuO based nanoparticles for sensing applications. The <i>Calotropis gigantea</i> leaf extract enhances the surface activity area of CuO and leads to achieving good electrochemical performance. In the amperometric mode, the fabricated sensor device was applied with a constant bias voltage of + 1 V at the CuO nanoparticle–based anode relative to the fixed lanthanum strontium cobaltite La<sub>0.5</sub>Sr<sub>0.5</sub>CoO<sub>3</sub> (LSC) cathode. Utilizing LaGaO<sub>3</sub> (LSGMN) as the solid electrolyte, this electrochemical device achieved a remarkable sensitivity of 586 μA/decade at 550 °C. The fabricated sensor structure was tested for detecting ammonia (NH<sub>3</sub>) concentrations ranging from 3 to 40 ppm in a base gas (mixture of 5% O<sub>2</sub> and N<sub>2</sub>), in the temperature range of 300 to 650 °C. This testing configuration was designed for exhaust gas monitoring applications. Notably, the sensor demonstrated a rapid response time of 20 s and a recovery time of 90 s, while detecting ammonia, making it effective for real-time monitoring in various environmental conditions.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":535,"journal":{"name":"Electrocatalysis","volume":"16 3","pages":"478 - 489"},"PeriodicalIF":2.7,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143840305","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Ultrasensitive and Selective Nanomolar Detection of Aceclofenac Using Bi2O3/CeO2@ B-NQds-Modified Electrodes Through an Advanced Photoelectrocatalytic Approach
IF 2.7 4区 化学
Electrocatalysis Pub Date : 2025-02-04 DOI: 10.1007/s12678-025-00935-9
Babu Shobana, Periakaruppan Prakash
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