Electrochimica Acta最新文献

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Electrochemical enrichment of a community of weak electricigens and characterisation of three halotolerant electroactive isolates: Micrococcus sp. YH-1, Gordonia sp. RH-1 and Stutzerimonas sp. CH-1 弱电原群落的电化学富集和三种耐盐电活性分离物的特征:Micrococcus sp.
IF 5.5 3区 材料科学
Electrochimica Acta Pub Date : 2024-11-12 DOI: 10.1016/j.electacta.2024.145350
Debasa Mukherjee, Lucinda Elizabeth Doyle
{"title":"Electrochemical enrichment of a community of weak electricigens and characterisation of three halotolerant electroactive isolates: Micrococcus sp. YH-1, Gordonia sp. RH-1 and Stutzerimonas sp. CH-1","authors":"Debasa Mukherjee,&nbsp;Lucinda Elizabeth Doyle","doi":"10.1016/j.electacta.2024.145350","DOIUrl":"10.1016/j.electacta.2024.145350","url":null,"abstract":"<div><div>Microbial electroactivity in elevated salt conditions is seldom studied, despite both fundamental and applied relevance. This work reports the enrichment of electroactive microorganisms under saline conditions (2 % NaCl), performed on screen-printed carbon electrodes with applied anodic potential. From the weakly electroactive enriched community, three halotolerant electroactive isolates were obtained in pure culture and identified via 16S rRNA gene sequencing. Two isolates were Gram positive (proposed names <em>Micrococcus</em> sp. YH-1 and <em>Gordonia</em> sp. RH-1) and one was Gram negative (proposed name <em>Stutzerimonas</em> sp. CH-1). The isolates were electrochemically characterised on conventional carbon felt electrodes using chronoamperometry. After two days of growth, a current density of 8.29 ± 0.85 μA/cm<sup>2</sup> was observed in <em>Micrococcus</em> sp. YH-1, comparable to reported values for the model electroactive microorganism <em>Shewanella oneidensis. Gordonia</em> sp. RH-1 and <em>Stutzerimonas</em> sp. CH-1 appeared to be weak electricigens due to their low current output (2.19 ± 0.46 μA/cm<sup>2</sup> and 1.73 ± 0.47 μA/cm<sup>2</sup>, respectively). The isolates are notable as there are very limited reports of electroactivity in the genera <em>Micrococcus</em> and <em>Gordonia</em>. Cyclic voltammetry revealed prominent redox peaks in <em>Micrococcus</em> sp. YH-1 and <em>Stutzerimonas</em> sp. CH-1. Scanning electron microscopy demonstrated colonisation of the electrode by each isolate, along with thin cellular appendages in <em>Micrococcus</em> sp. YH-1 and <em>Stutzerimonas</em> sp. CH-1. This work extends the catalogue of characterised halotolerant electroactive microbes while also enhancing our understanding of weak electricigens, extracellular electron transfer in Gram positives, and the inherent electroactivity of the natural environment.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"510 ","pages":"Article 145350"},"PeriodicalIF":5.5,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142601805","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
In-situ Raman observation on gas diffusion electrode/polyelectrolyte interface 对气体扩散电极/聚电解质界面的原位拉曼观测
IF 5.5 3区 材料科学
Electrochimica Acta Pub Date : 2024-11-12 DOI: 10.1016/j.electacta.2024.145348
Guangzhe Wang, Gongwei Wang, Lin Zhuang, Li Xiao
{"title":"In-situ Raman observation on gas diffusion electrode/polyelectrolyte interface","authors":"Guangzhe Wang,&nbsp;Gongwei Wang,&nbsp;Lin Zhuang,&nbsp;Li Xiao","doi":"10.1016/j.electacta.2024.145348","DOIUrl":"10.1016/j.electacta.2024.145348","url":null,"abstract":"<div><div>Polyelectrolytes (PEs) serve as the critical medium for electrochemical reactions in membrane-based electrochemical devices, such as fuel cells and membrane electrolyzers. To optimize membrane-based electrochemical device performance and elucidate reaction mechanisms, there is a pressing need for detailed microscopic molecular information at gas diffusion electrode/PE interfaces. In this work, we designed a novel membrane-based-electrochemical-device-like gas diffusion electrode/polyelectrolyte electrochemical <em>in-situ</em> Raman cell. The cell's configuration and gas transfer characteristics closely mimic those of membrane-based electrochemical devices under working conditions. We created a Pt/Nafion(<em>s</em>) interface by hot-pressing satellite Au@SiO<sub>2</sub>-Pt loaded carbon cloth with a Nafion membrane, and used this interface for electrochemical <em>in-situ</em> surface enhanced Raman spectroscopy (SERS) observation, including oxygen adsorption/desorption processes, structure of interfacial water and functional groups of Nafion under Ar. The cell enables negatively polarize the potential down to -1.6 V vs. RHE without stripping of the solid/solid interface, despite vigorous H<sub>2</sub> generation. The stability of the interface under extreme conditions demonstrates rapid gas transfer at the interface. This observation underscores the potential of our <em>in-situ</em> Raman cell for studying various gas-involved reactions under conditions that closely resemble those in operational membrane-based electrochemical devices.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"510 ","pages":"Article 145348"},"PeriodicalIF":5.5,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142599869","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Biopolymers as three-dimensional structural binders for nickel-cobalt sulfide supercapacitor electrodes 生物聚合物作为硫化镍钴超级电容器电极的三维结构粘合剂
IF 5.5 3区 材料科学
Electrochimica Acta Pub Date : 2024-11-10 DOI: 10.1016/j.electacta.2024.145345
Jiamei Li , Zhe Chen , Fuqiang Chen , Zhijin Zhu , Tongwei Shen , Yunxiang Chen , Yaliang Chen , Yanqun Shao
{"title":"Biopolymers as three-dimensional structural binders for nickel-cobalt sulfide supercapacitor electrodes","authors":"Jiamei Li ,&nbsp;Zhe Chen ,&nbsp;Fuqiang Chen ,&nbsp;Zhijin Zhu ,&nbsp;Tongwei Shen ,&nbsp;Yunxiang Chen ,&nbsp;Yaliang Chen ,&nbsp;Yanqun Shao","doi":"10.1016/j.electacta.2024.145345","DOIUrl":"10.1016/j.electacta.2024.145345","url":null,"abstract":"<div><div>Ion diffusion and electron transfer are hindered by commonly used hydrophobic binders, which directly affect the electrochemical performance of the electrodes. Hydrophilic binders are selected to efficaciously solve the problem of relatively low actual specific capacitance and rate performance in the field of nickel cobalt sulfide electrode materials. In the paper, RuCoNiS electrodes were prepared using polytetrafluoroethylene (PTFE), carboxymethyl cellulose (CMC), xanthan gum (XG), and chitosan (CS) as binders. The surface wettability, morphological structure, specific surface area, and electrochemical performance of electrodes with different binders were analyzed by XRD, SEM, BET, CV, GCD, and EIS, etc. It's shown that the synthesis of CoNi<sub>2</sub>S is confirmed by XRD. The XPS results verify the existence of RuO<sub>2</sub> and Ni<sup>2+</sup>/Ni<sup>3+</sup> and Co<sup>2+</sup>/Co<sup>3+</sup> redox couples. A cross-linked network structure is formed on the surface of the RuCoNiS by CS. The CS-RuCoNiS electrode has the largest specific surface area and microporosity. Ion migration in the electrolyte is facilitated by the excellent wettability of the CS-RuCoNiS electrode. The CS-RuCoNiS electrode reachs 1193.52 F g<sup>-1</sup>, which is 1.74 times higher than that of the PTFE-RuCoNiS electrode at 1 A g<sup>-1</sup>. The CS binder with its three-dimensional structure has the highest ionic conductivity of 2.29 × 10<sup>-4</sup> S cm<sup>-1</sup>, a lower R<sub>ct</sub>, good cycling stability with a capacity retention of 84.3 % after 5000 cycles at 200 mV s<sup>-1</sup>, and excellent rate performance of 85.6 %. It can provide a practical application in supercapacitors.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"510 ","pages":"Article 145345"},"PeriodicalIF":5.5,"publicationDate":"2024-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142596622","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A critical analysis of the voltammetry of fenamic acids: Evidence of diclofenac and mefenamic acid electroactive film formation 对非那西酸伏安法的批判性分析:双氯芬酸和甲非那酸电活性膜形成的证据
IF 5.5 3区 材料科学
Electrochimica Acta Pub Date : 2024-11-10 DOI: 10.1016/j.electacta.2024.145346
Kevin J. Kurian , Justynne Fabian , John Cassidy , Anthony Betts
{"title":"A critical analysis of the voltammetry of fenamic acids: Evidence of diclofenac and mefenamic acid electroactive film formation","authors":"Kevin J. Kurian ,&nbsp;Justynne Fabian ,&nbsp;John Cassidy ,&nbsp;Anthony Betts","doi":"10.1016/j.electacta.2024.145346","DOIUrl":"10.1016/j.electacta.2024.145346","url":null,"abstract":"<div><div>The voltammetric behaviour of diclofenac and mefenamic acid at a screen printed carbon electrode is very similar and both compounds share a similar molecular structure to that of diphenylamine. In each case on repeated scanning, an electroactive film is deposited due to the polymerisation of either of the molecules. The resultant film adheres to the electrode and is stable in aqueous solution for both diclofenac and mefenamic acid. This film formation is unique to a carbon electrode as no layers were found to form on Pt or Au. The formal potential of the confined layer shifts with pH, with a slope of about -59 mV/pH unit. Such layers will prevent the multiple use of the electrode in quantitative analysis unless it is cleaned between runs. A model based on the polymer formation from a diphenylamine backbone is proposed.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"510 ","pages":"Article 145346"},"PeriodicalIF":5.5,"publicationDate":"2024-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142596621","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Enhanced air stability and interface compatibility in Nb-O-doped Cl-rich Li-argyrodites for all-solid-state Li metal batteries 用于全固态锂金属电池的 Nb-O 掺杂富钴锂电池具有更高的空气稳定性和界面兼容性
IF 5.5 3区 材料科学
Electrochimica Acta Pub Date : 2024-11-09 DOI: 10.1016/j.electacta.2024.145341
Shulin Li , Qiaoquan Lin , Han Yan , Qiaodong Li , Yu Yang , Xinlin Yan , Zhenyu Wang , Chuang Yu , Long Zhang
{"title":"Enhanced air stability and interface compatibility in Nb-O-doped Cl-rich Li-argyrodites for all-solid-state Li metal batteries","authors":"Shulin Li ,&nbsp;Qiaoquan Lin ,&nbsp;Han Yan ,&nbsp;Qiaodong Li ,&nbsp;Yu Yang ,&nbsp;Xinlin Yan ,&nbsp;Zhenyu Wang ,&nbsp;Chuang Yu ,&nbsp;Long Zhang","doi":"10.1016/j.electacta.2024.145341","DOIUrl":"10.1016/j.electacta.2024.145341","url":null,"abstract":"<div><div>Cl-rich Li-argyrodites are one type of sulfide solid electrolytes (SSEs) with a high ionic conductivity and suitable mechanical properties for practical application. However, their tolerance against moisture in air and compatibility with metallic Li need further improvements. Here, we demonstrate that Nb-O dual-doping can be a good strategy for advanced Cl-rich Li-argyrodite SSEs, prepared by high energy ball milling and annealing method. Our results show that the Nb-O co-doping enhances the interface compatibility towards metallic Li and improves the moisture resistance, while maintains a fast ion transport. The Nb-O incorporation improves the Young's modulus and mitigates the side reaction of Li-argyrodite with Li. The doping-optimized sample demonstrates a high critical current density of 2.28 mA cm<sup>−2</sup> and a long-term Li plating/stripping stability under a relatively high current density (1 mA cm<sup>−2</sup>) for nearly 3000 cycles. Notably, the corresponding all-solid-state lithium batteries (ASSLBs), using a Li metal electrode, can maintain a superior cycling stability for over 1000 cycles at 1 C.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"509 ","pages":"Article 145341"},"PeriodicalIF":5.5,"publicationDate":"2024-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142596628","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A comparative study on the electrocatalytic efficiency of coupled (CuO-Co3O4) vs. mixed (CuCo2O4) metal oxides: Probed by hydrazine oxidation and sensitive determination 耦合(CuO-Co3O4)与混合(CuCo2O4)金属氧化物电催化效率的比较研究:通过肼氧化和灵敏度测定进行探究
IF 5.5 3区 材料科学
Electrochimica Acta Pub Date : 2024-11-09 DOI: 10.1016/j.electacta.2024.145337
Smita Singh, Varsha Singh, Vikram Rathour, Vellaichamy Ganesan
{"title":"A comparative study on the electrocatalytic efficiency of coupled (CuO-Co3O4) vs. mixed (CuCo2O4) metal oxides: Probed by hydrazine oxidation and sensitive determination","authors":"Smita Singh,&nbsp;Varsha Singh,&nbsp;Vikram Rathour,&nbsp;Vellaichamy Ganesan","doi":"10.1016/j.electacta.2024.145337","DOIUrl":"10.1016/j.electacta.2024.145337","url":null,"abstract":"<div><div>This work reports the synthesis of copper- and cobalt-based coupled and mixed metal oxides (CuO-Co<sub>3</sub>O<sub>4</sub> and CuCo<sub>2</sub>O<sub>4</sub>, respectively) utilizing a simple hydrothermal and calcination approach. CuO-Co<sub>3</sub>O<sub>4</sub>, CuCo<sub>2</sub>O<sub>4</sub>, and the control samples were characterized by powder X-ray diffraction (XRD), high-resolution transmission electron microscopy (HR-TEM), field emission scanning electron microscopy (FE-SEM), energy dispersive X-ray, and X-ray photoelectron spectroscopy. TEM and FE-SEM analyses of CuO-Co<sub>3</sub>O<sub>4</sub> reveal the presence of two distinct morphologies: rod- and sphere-shaped particles (CuO and Co<sub>3</sub>O<sub>4</sub>, respectively). Further, CuO-Co<sub>3</sub>O<sub>4</sub> was efficiently utilized as an electrocatalyst for the selective oxidation of hydrazine (Hyz). CuO-Co<sub>3</sub>O<sub>4</sub> shows a high redox response compared to CuO, Co<sub>3</sub>O<sub>4</sub>, CuCo<sub>2</sub>O<sub>4</sub>, and the physical mixture of CuO and Co<sub>3</sub>O<sub>4</sub> (CuO/Co<sub>3</sub>O<sub>4</sub>). This enhanced performance is attributed to the synergistic interaction between the metal ions caused by their close proximity and the increased exposure of surface active sites. CuO-Co<sub>3</sub>O<sub>4</sub> shows a broad linear range (1–3500 µM), a low detection limit (0.29 µM), and high sensitivity (0.5756 µA µM<sup>-1</sup> cm<sup>-2</sup>) for the Hyz determination. Kinetic parameters, for instance the diffusion coefficient and catalytic rate constant for Hyz oxidation were obtained using chronoamperometry. Additionally, CuO-Co<sub>3</sub>O<sub>4</sub> was effectively utilized to analyze Hyz in real samples with acceptable recovery rates.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"510 ","pages":"Article 145337"},"PeriodicalIF":5.5,"publicationDate":"2024-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142596624","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Morphological evolution and surface orientation effects of nickel manganese oxide in the preparation of LNMO cathode material 制备 LNMO 阴极材料时镍锰氧化物的形态演变和表面取向效应
IF 5.5 3区 材料科学
Electrochimica Acta Pub Date : 2024-11-09 DOI: 10.1016/j.electacta.2024.145330
Zhengqing Pei , Jiawei Wang , Haifeng Wang , Kexin Zheng , Qian Wang , Jiexin Zhou , Dehua Ma , Ju Lu , Fanghai Lu
{"title":"Morphological evolution and surface orientation effects of nickel manganese oxide in the preparation of LNMO cathode material","authors":"Zhengqing Pei ,&nbsp;Jiawei Wang ,&nbsp;Haifeng Wang ,&nbsp;Kexin Zheng ,&nbsp;Qian Wang ,&nbsp;Jiexin Zhou ,&nbsp;Dehua Ma ,&nbsp;Ju Lu ,&nbsp;Fanghai Lu","doi":"10.1016/j.electacta.2024.145330","DOIUrl":"10.1016/j.electacta.2024.145330","url":null,"abstract":"<div><div>The study investigated the evolution of LNMO (LiNi0.5Mn1.5O4) morphology and surface orientation as a function of increasing temperature. The results show that at an initial calcination temperature of 750 °C, LNMO exhibits spherical polyhedral with (111), (110), and (100) facets and relatively small particle sizes. In response to increasing temperatures, the particle size increases, the number of crystal facets decreases, and the material ultimately transitions to a typical spinel structure. Notably, the LNMO material calcined at 750 °C demonstrates a high lithium-ion migration rate, retaining 81.24% of its capacity after 500 cycles at a 2 C rate. This exceptional performance is attributed to the exposure of multiple crystal facets, suitable particle size, and the presence of Mn³⁺, which collectively stabilize the crystal structure and provide suitable pathways for Li⁺ transport.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"509 ","pages":"Article 145330"},"PeriodicalIF":5.5,"publicationDate":"2024-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142596713","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Tailoring of electrocatalytic oxygen evolution reaction performance of 2D conductive Co-catecholate metal-organic frameworks 定制二维导电共邻苯二酚金属有机框架的电催化氧进化反应性能
IF 5.5 3区 材料科学
Electrochimica Acta Pub Date : 2024-11-09 DOI: 10.1016/j.electacta.2024.145343
Priyadharshini T , M. Lakshmi Narayana , Murugasenapathi N․K․ , Tamilarasan Palanisamy , A.V. Ravindra
{"title":"Tailoring of electrocatalytic oxygen evolution reaction performance of 2D conductive Co-catecholate metal-organic frameworks","authors":"Priyadharshini T ,&nbsp;M. Lakshmi Narayana ,&nbsp;Murugasenapathi N․K․ ,&nbsp;Tamilarasan Palanisamy ,&nbsp;A.V. Ravindra","doi":"10.1016/j.electacta.2024.145343","DOIUrl":"10.1016/j.electacta.2024.145343","url":null,"abstract":"<div><div>Herein, we report the microwave hydrothermal synthesis of highly porous and conductive 2D Co-catecholate MOFs (Co-CATs) in the absence (Co-CAT-WO) and presence (Co-CAT-W) of N-methyl-2-pyrrolidone (NMP) polar solvent, and the study of these Co-CATs as electrocatalysts for oxygen evolution reaction (OER). The OER performance of Co-CAT-WO and Co-CAT-W is compared. The as-synthesized Co-CATs exhibit a 2D layered hexagonal structure. The electrical conductivity of Co-CAT-WO and Co-CAT-W is 6.9 and 5.8 S/m, respectively. The good conductivity and porous structure can initiate charge transport to achieve better OER performance under the 4e<sup>-</sup>-transfer process. The as-prepared Co-CAT-WO and Co-CAT-W, respectively, show an overpotential of 455 and 424 mV at 10 mA/cm<sup>2</sup> after performing the durability and chronoamperometry experiments for 13 h in 1 M KOH. From the electrochemical studies, it is apparent that the Co-CAT-W exhibits better OER performance with low overpotential, high current density, and excellent stability over extended cycling. Moreover, the lower HOMO-LUMO gap for Co-CAT-W than that of the Co-CAT-WO endorses its better electrocatalytic activity. The post-OER results show that the Co-CAT-W electrocatalyst acts as a \"precatalyst\" rather than the original catalyst, and it undergoes electrochemical transformation to metal hydroxide and metal oxyhydroxide after the OER studies, promoting the OER kinetics. The findings of this work offer valuable insights into the synthetic strategies for developing 2D conducting metal-catecholate MOF catalysts for efficient and sustainable OER processes, which is crucial in water splitting for sustainable energy production.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"509 ","pages":"Article 145343"},"PeriodicalIF":5.5,"publicationDate":"2024-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142596626","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Faradically dominant pseudocapacitive graphitic carbon nitride nanosheets decorated with strontium tungstate nanospheres for supercapattery device and hydrogen evaluation reaction 用钨酸锶纳米球装饰的伪电容性氮化石墨碳纳米片用于超级电池装置和氢评价反应
IF 5.5 3区 材料科学
Electrochimica Acta Pub Date : 2024-11-09 DOI: 10.1016/j.electacta.2024.145339
Ehtisham Umar , M. Waqas Iqbal , Fozia Shaheen , Hameed Ullah , Rizwan Wahab
{"title":"Faradically dominant pseudocapacitive graphitic carbon nitride nanosheets decorated with strontium tungstate nanospheres for supercapattery device and hydrogen evaluation reaction","authors":"Ehtisham Umar ,&nbsp;M. Waqas Iqbal ,&nbsp;Fozia Shaheen ,&nbsp;Hameed Ullah ,&nbsp;Rizwan Wahab","doi":"10.1016/j.electacta.2024.145339","DOIUrl":"10.1016/j.electacta.2024.145339","url":null,"abstract":"<div><div>Transition metal oxides are promising for hydrogen evolution reaction (HER) and hybrid energy storage due to their excellent redox properties, inherent electrochemical activity, and abundant electroactive sites. A significant challenge limiting their broader application is their intrinsic low electrical conductivity and reduced electrochemical stability. For hybrid energy storage devices and HER, a highly electrochemical active material is designed from 2D graphitic carbon nitride nanosheet (g-C<sub>3</sub>N<sub>4</sub>) networks anchored with strontium tungstate nanospheres (SrWO<sub>4</sub>/g-C<sub>3</sub>N<sub>4</sub>). The excellent performance observed can be attributed to several factors: multiple electro-active sites, well-defined electronic structures, and interaction between SrWO<sub>4</sub> nanosphere on the surface of g-C<sub>3</sub>N<sub>4</sub> nanosheets surface. The supercapattery device exhibited superior energy density (65.4 W h/kg) and power density (1240.5 W/kg) in comparison. In addition, the theoretical technique was utilized to provide a detailed analysis of the experimental findings. In addition, the SrWO<sub>4</sub>/g-C<sub>3</sub>N<sub>4</sub> material demonstrates a low overpotential of 129 mV at -10 mA/cm<sup>2</sup>, along with Tafel slope values of 67 mV/dec for the HER, and it exhibits excellent cyclic stability. This study presents an advanced method for designing SrWO<sub>4</sub>/g-C<sub>3</sub>N<sub>4</sub>-based supercapacitors and HER platforms with nanoscale structures and optimized interface arrangements.</div></div>","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"510 ","pages":"Article 145339"},"PeriodicalIF":5.5,"publicationDate":"2024-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142596625","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Lithium anode stability enhanced by micro-potentials from spontaneous polarization in BaTiO3 films 氧化钡薄膜自发极化产生的微电势增强了锂阳极稳定性
IF 5.5 3区 材料科学
Electrochimica Acta Pub Date : 2024-11-09 DOI: 10.1016/j.electacta.2024.145342
Lisha Chen , Xinyang Zhang , Tiantian Chen , Zheng Wang , Dingguo Tang , Danqi He , Wenyu Zhao
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