Journal of Electroanalytical Chemistry最新文献

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Mesocrystalline effect boosts the alloying reaction kinetics of Sb2O4 anode in half/full sodium-ion batteries 介晶效应促进了半/全钠离子电池中 Sb2O4 阳极的合金化反应动力学
IF 4.1 3区 化学
Journal of Electroanalytical Chemistry Pub Date : 2024-10-28 DOI: 10.1016/j.jelechem.2024.118753
Ling Guo , Liyun Cao , Jianfeng Huang , Jiayin Li , Yong Zhao , Yijun Liu , Xing Wang , Yishou Wang
{"title":"Mesocrystalline effect boosts the alloying reaction kinetics of Sb2O4 anode in half/full sodium-ion batteries","authors":"Ling Guo ,&nbsp;Liyun Cao ,&nbsp;Jianfeng Huang ,&nbsp;Jiayin Li ,&nbsp;Yong Zhao ,&nbsp;Yijun Liu ,&nbsp;Xing Wang ,&nbsp;Yishou Wang","doi":"10.1016/j.jelechem.2024.118753","DOIUrl":"10.1016/j.jelechem.2024.118753","url":null,"abstract":"<div><div>Mesocrystalline materials are reported to show great advantages in improving electrochemical performance. However, there are no reports about mesocrystalline Sb<sub>2</sub>O<sub>4</sub> anode, and the structure advantage in reaction kinetics is unclear. In this work, we have prepared a mesocrystalline Sb<sub>2</sub>O<sub>4</sub> structure (M−Sb<sub>2</sub>O<sub>4</sub>) in a facile hydrothermal process and further explored the structure effect on reaction kinetics. The exploration results show that the micro-flower mesocrystalline M−Sb<sub>2</sub>O<sub>4</sub> consists of oriented nanowires with (110) crystal faces showing large surface area and high porosity. This structure can increase the contact area between electrode and electrolyte, provide fast Na<sup>+</sup> transfer channels, and shorten the charge transport path, exhibiting excellent alloying reaction kinetics. The excellent reaction kinetics improves rate performance with a capacity of 432 mA h g<sup>-1</sup> at 5 A g<sup>-1</sup>. Furthermore, it exhibits a high power density of 1700 W kg<sup>−1</sup> in the full cell. Compared to the other reported various structured Sb-based anodes, M−Sb<sub>2</sub>O<sub>4</sub> exhibits a great performance advantage. This work demonstrates that the mesocrystalline effect can effectively enhance alloying reaction kinetics, providing a new strategy for performance optimization of other alloy-based anodes.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"974 ","pages":"Article 118753"},"PeriodicalIF":4.1,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142573467","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
One-step synthesis of dendritic nanostructured single crystal NiSe electrocatalyst for hydrogen evolution reaction 一步合成用于氢气进化反应的树枝状纳米结构单晶 NiSe 电催化剂
IF 4.1 3区 化学
Journal of Electroanalytical Chemistry Pub Date : 2024-10-28 DOI: 10.1016/j.jelechem.2024.118751
Qin Li , Xingqiang Zhou , Haowei Hu , Kun Hu , Hui Liu , Xiaolong Fang
{"title":"One-step synthesis of dendritic nanostructured single crystal NiSe electrocatalyst for hydrogen evolution reaction","authors":"Qin Li ,&nbsp;Xingqiang Zhou ,&nbsp;Haowei Hu ,&nbsp;Kun Hu ,&nbsp;Hui Liu ,&nbsp;Xiaolong Fang","doi":"10.1016/j.jelechem.2024.118751","DOIUrl":"10.1016/j.jelechem.2024.118751","url":null,"abstract":"<div><div>A novel dendritic nanostructure NiSe has been synthesized for electrocatalytic hydrogen evolution reaction (HER) through a hydrothermal method. The micromorphology and microstructure characterizations show that the branches of the dendritic NiSe are epitaxially grown on the trunk, and individual nickel selenide dendrites have three-dimensional structures with four branches in short axes. The nanostructures of each branch are paralleled to each other in the same plane, and are perpendicular to the trunk with the same crystal orientation. The dendritic NiSe catalyst demonstrates highly efficient HER activity with a low overpotential of 191 mV and a small Tafel slope of 47 mV dec<sup>−1</sup> in acidic solutions. The remarkable enhancement of the dendritic NiSe in the HER performance can be attributed to its dense dendritic nano-structure, and high specific surface area, which provide effective diffusion channels and much more catalytic sites towards the HER. This achievement provides a new method for producing cheap and efficient dendritic nanostructures catalysts for water splitting.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"974 ","pages":"Article 118751"},"PeriodicalIF":4.1,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142572967","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
Codoping of carbon and boron composition in Na3V2(PO4)2F3 affects its sodium storage properties Na3V2(PO4)2F3 中碳和硼成分的共轭会影响其钠储存特性
IF 4.1 3区 化学
Journal of Electroanalytical Chemistry Pub Date : 2024-10-28 DOI: 10.1016/j.jelechem.2024.118741
Ao Wang , Zhixue Tian , Xiaohan Li , Yujun Chai , Ning Wang
{"title":"Codoping of carbon and boron composition in Na3V2(PO4)2F3 affects its sodium storage properties","authors":"Ao Wang ,&nbsp;Zhixue Tian ,&nbsp;Xiaohan Li ,&nbsp;Yujun Chai ,&nbsp;Ning Wang","doi":"10.1016/j.jelechem.2024.118741","DOIUrl":"10.1016/j.jelechem.2024.118741","url":null,"abstract":"<div><div>NASICON-type Na<sub>3</sub>V<sub>2</sub>(PO<sub>4</sub>)<sub>2</sub>F<sub>3</sub> (NVPF) is a promising cathode material for Na-ion batteries due to its higher discharge capacity, appropriate voltage platform and output energy density. But its poor electronic conductivity should be increased to push its utilization. Here, the in-situ carbon and heteroatom B are introduced into to NVPF to improve the electrochemical performance. When citric acid is used as a carbon source, the free movement of electrons between V and the citric acid group is facilitated by the electrostatic force, causing a change in the valence state of V. It is a mixed valence of + 4 and + 3 for V in the product after annealing. The doping of B at O sites has no effect on ionic bond in solution and the crystal structure of the product. But, it decreases the formation energy, induces the charge redistribution and improves the conductivity. Excellent electrochemical performance is achieved with a B doping of 15 % to NVPF/C. Even after 1000 cycles, a capacity of 47.9 mAh g<sup>−1</sup> is retained. The structure of NVPF/C-B is preserved during cycling, but compositional deviation at the electrode surface leads to some degradation. The relationship between the valence of V, doping B into the NVPF, and the degradation mechanism over repeated cycles provide a deep understanding of the complex interplay between metallic ions and carbon source, and the B-doping.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"974 ","pages":"Article 118741"},"PeriodicalIF":4.1,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142572969","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
Electrochemical synthesis of biaryls via CH/CH homocoupling of methoxyarenes 通过甲氧基烯烃的 CH/CH 同偶联反应电化学合成双芳基化合物
IF 4.1 3区 化学
Journal of Electroanalytical Chemistry Pub Date : 2024-10-28 DOI: 10.1016/j.jelechem.2024.118739
Babak Kaboudin , Sepideh Sadighi , Fahimeh Varmaghani , Leila Behrouzi
{"title":"Electrochemical synthesis of biaryls via CH/CH homocoupling of methoxyarenes","authors":"Babak Kaboudin ,&nbsp;Sepideh Sadighi ,&nbsp;Fahimeh Varmaghani ,&nbsp;Leila Behrouzi","doi":"10.1016/j.jelechem.2024.118739","DOIUrl":"10.1016/j.jelechem.2024.118739","url":null,"abstract":"<div><div>A direct and one-pot electrosynthesis method for the regioselective synthesis of bis methoxybiarenes <em>via</em> homocoupling of methoxyarenes has been studied in undivided cells in the transition-metal and oxidant-free conditions. The effect of various parameters, such as electrodes, electrolytes, and solvents has been studied and evaluated. To gain detailed mechanistic insight into the reaction, cyclic voltammetric (CV) studies of methoxyarenes were performed, and a radical pathway has been suggested. The reaction begins with an anodic oxidation of anisole to an anisyl cation radical followed by reaction with another anisole may form a new bisanisyl cation radical. The formed intermediate undergoes a hydrogen abstraction, followed by anodic oxidation gave bisanisyl cation and the bisanisole was obtained by abstraction of second hydrogen.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"974 ","pages":"Article 118739"},"PeriodicalIF":4.1,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142572970","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
Facile synthesis of Co-FeP nanoparticles confined in N, P doped carbon matrix with modulated d-band center as an efficient HER catalyst 在掺杂 N、P 的碳基质中简便合成具有调制 d 波段中心的 Co-FeP 纳米粒子,作为高效 HER 催化剂
IF 4.1 3区 化学
Journal of Electroanalytical Chemistry Pub Date : 2024-10-28 DOI: 10.1016/j.jelechem.2024.118730
Ting Zhang , Jianguo Zhong , Wei Gao , Yuxin Wang
{"title":"Facile synthesis of Co-FeP nanoparticles confined in N, P doped carbon matrix with modulated d-band center as an efficient HER catalyst","authors":"Ting Zhang ,&nbsp;Jianguo Zhong ,&nbsp;Wei Gao ,&nbsp;Yuxin Wang","doi":"10.1016/j.jelechem.2024.118730","DOIUrl":"10.1016/j.jelechem.2024.118730","url":null,"abstract":"<div><div>Transition metal-based materials are a type of catalyst that exhibits enhanced activity and stability during hydrogen production. However, suboptimal binding energy and nanoparticle aggregation during reactions restrict their practical use. Therefore, we report a simple and effective approach through a single-step phosphating reaction to adjust the d-band center of the catalyst, as well as protect the catalysts in the N, P doped carbon matrix from aggregation. Co-FeP@NPC exhibits enhanced HER performance with 95 mV and 159 mV at −10 mA cm<sup>−2</sup> in both acid and alkaline electrolytes. Theoretical computations validate that the enhanced HER activity stems from the downshift of the d-band center, thus weakening adsorption toward the H* intermediate in hydrogen production. In addition, the N, P-doped carbon matrix serves to shield Co-FeP nanoparticles from aggregation, thereby enhancing the exposure of active sites during the reaction. This investigation unveils novel avenues for designing high-performance transition metal-based materials in catalysis.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"974 ","pages":"Article 118730"},"PeriodicalIF":4.1,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142578415","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
Enhancement of capacitance retention of ZnCo2S4@Metal organic framework composite electrodes by hydrothermal process 水热法提高 ZnCo2S4@ 金属有机框架复合电极的电容保持率
IF 4.1 3区 化学
Journal of Electroanalytical Chemistry Pub Date : 2024-10-26 DOI: 10.1016/j.jelechem.2024.118748
Sivalingam Ramesh , Iqra Rabani , K. Senthilkumar , Yuvaraj Haldorai , Manickam Selvaraj , Young-Soo Seo , Joo-Hyung Kim , Heung Soo Kim
{"title":"Enhancement of capacitance retention of ZnCo2S4@Metal organic framework composite electrodes by hydrothermal process","authors":"Sivalingam Ramesh ,&nbsp;Iqra Rabani ,&nbsp;K. Senthilkumar ,&nbsp;Yuvaraj Haldorai ,&nbsp;Manickam Selvaraj ,&nbsp;Young-Soo Seo ,&nbsp;Joo-Hyung Kim ,&nbsp;Heung Soo Kim","doi":"10.1016/j.jelechem.2024.118748","DOIUrl":"10.1016/j.jelechem.2024.118748","url":null,"abstract":"<div><div>Metal organic framework-derived materials are promising electrodes for electrochemical supercapacitors due to their surface area, porosity, and excellent redox behaviors. In the present study the fabrication of ZnCo<sub>2</sub>S<sub>4</sub> and ZnCo<sub>2</sub>S<sub>4</sub>@ZIF-67 composites synthesized by solid-state grinding and hydrothermal processing for supercapacitor utilization. Studies using XRD, XPS, FTIR, BET, FE-SEM, and HR-TEM are employed to validate the morphological, surface, and structural characteristics. Highly conductive ZnCo<sub>2</sub>S<sub>4</sub> nanostructured materials are intercalated with MOF surfaces to enhance electron transport. The high number of active sites involved in the rapid electrochemical phase fluctuation using 1 M KOH electrolyte may be the cause of this. ZnCo<sub>2</sub>S<sub>4</sub> and ZnCo<sub>2</sub>S<sub>4</sub>@ZIF-67 composites are used to create the working electrode, while a 1 M KOH electrolyte is used for the supercapacitor. By employing a three-electrode design, the created composite electrodes improve cyclic retention with specific capacitances of 245 and 447.14F/g at 1 A/g, respectively. Two electrode configurations are used to build ZnCo<sub>2</sub>S<sub>4</sub>@ZIF-67/1M KOH/SSC, which produced results of 151.42F/g at 1 A/g, 85.2 % capacitance retention at 7 A g<sup>−1</sup> of 7000 cycles, and 18.93 Wh kg<sup>−1</sup> energy density at 642.85 W kg<sup>−1</sup> power density. Thus, the fabricated composite electrodes may find application in electrochemical symmetric supercapacitor via two electrode configuration systems.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"974 ","pages":"Article 118748"},"PeriodicalIF":4.1,"publicationDate":"2024-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142553969","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
Molybdenum carbide nanosheets with iron doping as electrocatalysts for highly efficient ammonia electrosynthesis 掺杂铁的碳化钼纳米片作为高效氨电合成的电催化剂
IF 4.1 3区 化学
Journal of Electroanalytical Chemistry Pub Date : 2024-10-26 DOI: 10.1016/j.jelechem.2024.118749
Muhammad Adnan Younis , Ahmed I. Osman , Amjad Ali , Fazal Haq , Tariq Aziz , Mehwish Kiran , Iffat Ayesha Khan , Rizwan Wahab , Saira Manzoor
{"title":"Molybdenum carbide nanosheets with iron doping as electrocatalysts for highly efficient ammonia electrosynthesis","authors":"Muhammad Adnan Younis ,&nbsp;Ahmed I. Osman ,&nbsp;Amjad Ali ,&nbsp;Fazal Haq ,&nbsp;Tariq Aziz ,&nbsp;Mehwish Kiran ,&nbsp;Iffat Ayesha Khan ,&nbsp;Rizwan Wahab ,&nbsp;Saira Manzoor","doi":"10.1016/j.jelechem.2024.118749","DOIUrl":"10.1016/j.jelechem.2024.118749","url":null,"abstract":"<div><div>The electrochemical reduction of nitrogen to ammonia represents a greener alternative to the Haber-Bosch process, demanding a shift towards low-cost and high-efficiency electrocatalysts. Recent advances in research have demonstrated the potential of molybdenum carbide-based catalysts to have their unique electronic structure and physicochemical properties. This study introduces ultrathin iron-doped molybdenum carbide nanosheets (Fe-MoC) as a novel catalyst for ammonia electrosynthesis. Demonstrating a remarkable ammonia production rate of 16 µg h<sup>−1</sup> mg<sup>−1</sup> and a Faradaic efficiency (FE) of approximately 13 % at −0.2 V, our synthesized Fe-MoC nanosheets stand out for their superior catalytic activity and selectivity towards nitrogen activation. The indophenol technique was employed to identify the generation of NH<sub>3</sub> in our experiments, followed by UV–vis spectrometry for quantitative analysis. Additionally, various characterization techniques, including XRD, Raman, and XPS, were used to analyze the material structure and surface properties. Through comprehensive characterization and electrochemical studies, we reveal the pivotal role of iron doping in enhancing the electrocatalytic performance for nitrogen reduction reaction (NRR), offering insights into the mechanistic pathways facilitated by Fe-MoC. The future development and perspective of Fe-MoC towards high performance are proposed.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"975 ","pages":"Article 118749"},"PeriodicalIF":4.1,"publicationDate":"2024-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142554172","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
Observations of stress corrosion cracking in pipeline steel in corrosive seawater environment including detailed observation of the crack initiation mechanism 观察腐蚀性海水环境中管道钢的应力腐蚀开裂情况,包括详细观察裂纹的形成机制
IF 4.1 3区 化学
Journal of Electroanalytical Chemistry Pub Date : 2024-10-26 DOI: 10.1016/j.jelechem.2024.118743
Xinyi Liu , Ming Wu , Ke Gong , Dongxu Sun , Xu Wang , Jin Li , Jin Du , Jacob C. Huang
{"title":"Observations of stress corrosion cracking in pipeline steel in corrosive seawater environment including detailed observation of the crack initiation mechanism","authors":"Xinyi Liu ,&nbsp;Ming Wu ,&nbsp;Ke Gong ,&nbsp;Dongxu Sun ,&nbsp;Xu Wang ,&nbsp;Jin Li ,&nbsp;Jin Du ,&nbsp;Jacob C. Huang","doi":"10.1016/j.jelechem.2024.118743","DOIUrl":"10.1016/j.jelechem.2024.118743","url":null,"abstract":"<div><div>The effect of stress concentration on crack initiation and propagation during stress corrosion cracking of carbon steel in alternate wet and dry marine condition was studied by constant load tensile and microelectrochemical test. Results showed that the notch front does not crack but pitting occurs in the corrosion process under load-free condition. Under the loading condition, the anodic dissolution (AD) near the notch gradually intensified, and this effect become severer with increasing load. The local environment of the load-induced rapid AD and hydrogen evolution (HE) can lead to crack initiation, indicating that the joint action of AD and HE is the main SCC mechanism.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"975 ","pages":"Article 118743"},"PeriodicalIF":4.1,"publicationDate":"2024-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142554173","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
Oxygen vacancy strategy enhancing the performance of TiO2/CNT supported ultrafine Pt catalyst for the oxygen reduction reaction 氧空位策略可提高 TiO2/CNT 支持的超细铂催化剂在氧还原反应中的性能
IF 4.1 3区 化学
Journal of Electroanalytical Chemistry Pub Date : 2024-10-26 DOI: 10.1016/j.jelechem.2024.118734
An-ru Yan , Xiao-bo Wang , Ling Zhu , Xue-sheng Liu , Zhi-yong Wang
{"title":"Oxygen vacancy strategy enhancing the performance of TiO2/CNT supported ultrafine Pt catalyst for the oxygen reduction reaction","authors":"An-ru Yan ,&nbsp;Xiao-bo Wang ,&nbsp;Ling Zhu ,&nbsp;Xue-sheng Liu ,&nbsp;Zhi-yong Wang","doi":"10.1016/j.jelechem.2024.118734","DOIUrl":"10.1016/j.jelechem.2024.118734","url":null,"abstract":"<div><div>Economic viability and durability are pivotal challenges limiting the commercial application of proton exchange membrane fuel cells (PEMFC). The development of low Pt usage oxygen reduction reaction catalysts with high catalytic activity and durability is imperative. Carbon support corrosion, as well as Pt particles agglomeration and exfoliation are primary causes of commercial Pt/C catalyst degradation. Here, a composite materials formed by TiO<sub>2</sub> containing oxygen vacancy (O<sub>V</sub>) and carbon nanotube (CNT) was used as a functional support to successfully load Pt nanoparticles (NPs). The oxygen vacancy facilitated interactions between TiO<sub>2</sub>(O<sub>V</sub>) and Pt, enhancing the anchoring of Pt NPs and suppressing particle growth. The Pt/TiO<sub>2</sub>(O<sub>V</sub>)-CNT demonstrates excellent performance with mass activity of 788 mA/mg<sub>Pt</sub> @0.85 V, the half-wave potential increased 34 mV and the tafel slope decreased by 11.89 mVdec<sup>−1</sup> compared to commercial Pt/C. The durability of Pt/TiO<sub>2</sub>(O<sub>V</sub>)-CNT nearly 3-fold that of commercial Pt/C with negligible decay of half-wave potential (0.9 %) and mass activity (16 %). Density functional theory calculations and X-ray photoelectron spectroscopy indicated that the charge transfer from TiO<sub>2</sub>(O<sub>V</sub>) to Pt facilitates the formation of strong metal-support interactions (SMSI), leading to a downward shift in the d-band center of Pt and a reduction in the binding strength to *OOH, thus lowering the activation energy of the rate-determining step which in turn promoting the activity of ORR. This study provides a reliable approach for designing catalysts with high activity and durability.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"974 ","pages":"Article 118734"},"PeriodicalIF":4.1,"publicationDate":"2024-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142573134","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
Development of smart molecularly imprinted tetrahedral amorphous carbon thin films for in vitro dopamine sensing 开发用于体外多巴胺传感的智能分子印迹四面体无定形碳薄膜
IF 4.1 3区 化学
Journal of Electroanalytical Chemistry Pub Date : 2024-10-26 DOI: 10.1016/j.jelechem.2024.118742
Giorgia Rinaldi , Khadijeh Nekoueian , Jarkko Etula , Tomi Laurila
{"title":"Development of smart molecularly imprinted tetrahedral amorphous carbon thin films for in vitro dopamine sensing","authors":"Giorgia Rinaldi ,&nbsp;Khadijeh Nekoueian ,&nbsp;Jarkko Etula ,&nbsp;Tomi Laurila","doi":"10.1016/j.jelechem.2024.118742","DOIUrl":"10.1016/j.jelechem.2024.118742","url":null,"abstract":"<div><div>This study investigates how varying the thickness of tetrahedral amorphous carbon (ta-C) thin films and incorporating a titanium adhesion layer influences the structural and electrochemical properties of molecularly imprinted ta-C thin film-based sensing platforms, aiming to develop a molecularly imprinted ta-C electrochemical sensor for dopamine (DA) detection with physiologically relevant sensitivity. This electrochemical sensing platform was designed by integrating ta-C with molecularly imprinted polymers (MIPs). The process involved depositing a ta-C thin film onto boron-doped p-type silicon wafers through a filtered cathodic vacuum arc (FCVA) system. Subsequently, the ta-C sensing platforms were electrochemically coated with the MIP layer (DA-imprinted polypyrrole). We evaluated three configurations: (i) a 15 nm ta-C layer, (ii) a 7 nm ta-C layer with a 20 nm titanium adhesion layer, and (iii) a 15 nm ta-C layer with a 20 nm titanium adhesion layer. Comprehensive structural and electrochemical characterization was performed to understand how these modifications affect sensor performance. The optimized MIP/ta-C sensor demonstrated a sensitivity of 0.16 μA μM<sup>−1</sup> cm<sup>−2</sup> and a limit of detection (LOD) of 48.6 nM, suitable for detecting DA at physiological levels. Leveraging the synergistic effects of ta-C coatings and molecular imprinting, as well as its compatibility with common complementary metal–oxide–semiconductor (CMOS) processes underlines its potential for integration into microanalytical systems, paving the way for miniaturized and high-throughput sensing platforms.</div></div>","PeriodicalId":355,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"976 ","pages":"Article 118742"},"PeriodicalIF":4.1,"publicationDate":"2024-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142704712","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
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