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Enzyme Fuel Cell for Cellulolytic Sugar Conversion Employing FAD Glucose Dehydrogenase and Carbon Cloth Electrode Based on Direct Electron Transfer Principle~!2010-01-09~!2010-02-04~!2010-05-17~! 利用FAD葡萄糖脱氢酶和基于直接电子转移原理的碳布电极进行纤维素解糖转化的酶燃料电池2010-01-09 2010-02-04 2010-05-17
The Open Electrochemistry Journal Pub Date : 2010-05-17 DOI: 10.2174/1876505X01002010006
Desriani, Takuya Hanashi, Tomohiko Yamazaki, W. Tsugawa, K. Sode
{"title":"Enzyme Fuel Cell for Cellulolytic Sugar Conversion Employing FAD Glucose Dehydrogenase and Carbon Cloth Electrode Based on Direct Electron Transfer Principle~!2010-01-09~!2010-02-04~!2010-05-17~!","authors":"Desriani, Takuya Hanashi, Tomohiko Yamazaki, W. Tsugawa, K. Sode","doi":"10.2174/1876505X01002010006","DOIUrl":"https://doi.org/10.2174/1876505X01002010006","url":null,"abstract":"An enzyme fuel cell employing a carbon cloth electrode and bacterial FAD dependent glucose dehydrogenase (FADGDH) based on the direct electron transfer principle was constructed, and its scalability and cellulolytic sugar conversion were investigated. FADGDH was immobilized on the carbon cloth electrode together with carbon paste to form a multi-module type enzyme fuel cell by combining platinum-supported carbon immobilized carbon cloth as the cathode. The enzyme fuel cell was stable for more than 7 days of continuous operation. The 3 3 module (18 cm 2 ) enzyme fuel cell generated 68 μW (3.8 μW/cm 2 ) using glucose as the substrate, which was almost 9 times that of a single-module enzyme fuel cell. Thanks to the substrate specificity of bacterial FADGDH, cellulolytic sugars were revealed to be a good substrate for the enzyme fuel cell with cellobiose (9.3 μW/cm 2 ), cellotriose (9.2 μW/cm 2 ), or cellotetraose (6.3 μW/cm 2 ). These results demonstrated that together with the feasibility of using carbon cloth as the electrode material, FADGDH as the anode catalyst will become the norm in electrochemical biomass applications in the future.","PeriodicalId":23074,"journal":{"name":"The Open Electrochemistry Journal","volume":"6 1","pages":"6-10"},"PeriodicalIF":0.0,"publicationDate":"2010-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89731389","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 8
Kinetic Study of the Hydrogen Oxidation Reaction on Membrane Coated Electrodes. Part II: Applications 膜电极上氢氧化反应的动力学研究。第二部分:应用
The Open Electrochemistry Journal Pub Date : 2010-04-20 DOI: 10.2174/1876505X01002010001
M. Rau, C. Marozzi, M. R. G. Chialvo, A. Chialvo
{"title":"Kinetic Study of the Hydrogen Oxidation Reaction on Membrane Coated Electrodes. Part II: Applications","authors":"M. Rau, C. Marozzi, M. R. G. Chialvo, A. Chialvo","doi":"10.2174/1876505X01002010001","DOIUrl":"https://doi.org/10.2174/1876505X01002010001","url":null,"abstract":"In the Part I of the present work, theoretical expressions for the analysis of the hydrogen oxidation reaction on electrodes covered with layers of polymeric membranes were derived. The diffusion of molecular hydrogen through the different layers and interfaces was taken into account, the kinetic treatment was based on the Volmer-Heyrovsky-Tafel mechanism and a Frumkin type adsorption was applied to the reaction intermediate. The resulting expressions were used to correlate experimental data measured by J. Maruyama et al. (J. Electroanal. Chem. 1998, 447, 201-209), obtained on a rotating platinum electrode covered with a Nafion membrane and on the corresponding bare electrode. A complete set of kinetic and mass transport parameters was obtained in both cases. The applicability of the Levich-Koutecky diagrams for the evaluation of the faradaic current-potential curves was also analyzed and discussed.","PeriodicalId":23074,"journal":{"name":"The Open Electrochemistry Journal","volume":"42 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2010-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73509174","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Electrochemical Behavior of Vanadium in Azide Electrolyte inComparison with the Behavior in Halogen Ions-Containing Electrolytes 叠氮化物电解质中钒的电化学行为与含卤素离子电解质行为的比较
The Open Electrochemistry Journal Pub Date : 2009-09-04 DOI: 10.2174/1876505X00901010042
A. Ghoneim
{"title":"Electrochemical Behavior of Vanadium in Azide Electrolyte inComparison with the Behavior in Halogen Ions-Containing Electrolytes","authors":"A. Ghoneim","doi":"10.2174/1876505X00901010042","DOIUrl":"https://doi.org/10.2174/1876505X00901010042","url":null,"abstract":"The influence of azide ion concentration and temperature on the electrochemical behavior of vanadium was studied using open-circuit potential (OCP), potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques. The steady state potential (Ess) is a linear function of azide ion concentration. Polarization measurements have shown that the rate of corrosion icorr increases with increasing the azide ion concentration as well as increasing solution temperature. EIS investigations under open-circuit conditions confirm these results as can be identified by the decrease of the polarization resistance (Rox) and oxide thickness (1/Cox) with increasing the azide ion concentration. The measured impedance responses were analyzed using a constant phase element (CPE) model with its complex transfer function. The behavior of vanadium in the azide medium is also compared to that in other halide salt solutions, it was found that the tendency for spontaneously grown thicker oxide film increases in the order: Br - > Cl - > I - > N 3 > F - .","PeriodicalId":23074,"journal":{"name":"The Open Electrochemistry Journal","volume":"48 1","pages":"42-47"},"PeriodicalIF":0.0,"publicationDate":"2009-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87860770","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Study of the Electrocatalytic Reaction of Hydrogen Peroxide Mediated byAzobenzene Monolayer with Several Multipotential Pulse Techniques 偶氮苯单分子膜催化过氧化氢电催化反应的多势脉冲技术研究
The Open Electrochemistry Journal Pub Date : 2009-09-04 DOI: 10.2174/1876505X00901010037
J. González, C. Soto, Á. Molina
{"title":"Study of the Electrocatalytic Reaction of Hydrogen Peroxide Mediated byAzobenzene Monolayer with Several Multipotential Pulse Techniques","authors":"J. González, C. Soto, Á. Molina","doi":"10.2174/1876505X00901010037","DOIUrl":"https://doi.org/10.2174/1876505X00901010037","url":null,"abstract":"The comparison between the response corresponding to a simple charge transfer taking place at an electroactive monolayer with that of an electrocatalytic process at a modified electrode are presented by using the multipulse potential techniques cyclic staircase voltammetry (CSCV) and cyclic square wave voltammetry (CSWV). General analytical and explicit equations for the IE responses have been tested by means of the study of the reduction of azobenzene monolayer at mercury electrode. The value of the chemical rate constant ( k c ' = 40 M  1 s  1 ) has been easily obtained from the cathodic plateau of the CSCV curves and from the best fitting between theoretical and experimental CSWV curves.","PeriodicalId":23074,"journal":{"name":"The Open Electrochemistry Journal","volume":"14 1","pages":"37-41"},"PeriodicalIF":0.0,"publicationDate":"2009-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79373033","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Investigation of Piperazine and its Derivatives as Vapor Phase Corrosion Inhibitors for Mild Steel 哌嗪及其衍生物作为低碳钢气相缓蚀剂的研究
The Open Electrochemistry Journal Pub Date : 2009-08-22 DOI: 10.2174/1876505X00901010032
Quraishi, F. A. Ansari, J. Rawat
{"title":"Investigation of Piperazine and its Derivatives as Vapor Phase Corrosion Inhibitors for Mild Steel","authors":"Quraishi, F. A. Ansari, J. Rawat","doi":"10.2174/1876505X00901010032","DOIUrl":"https://doi.org/10.2174/1876505X00901010032","url":null,"abstract":"Piperazine and its derivatives such as phosphates, carbonates, benzoates, cinnamate and maleate were developed and investigated as vapor phase corrosion inhibitors by weight loss, potentiodynamic polarization methods for mild steel. All of these compounds have shown good inhibition efficiency for mild steel after 30 days under continuous condensation test (CT). The potentiodynamic polarization studies have shown predominantly anodic behavior of all these compounds.","PeriodicalId":23074,"journal":{"name":"The Open Electrochemistry Journal","volume":"31 1","pages":"32-36"},"PeriodicalIF":0.0,"publicationDate":"2009-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89615254","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 7
Fractal Pattern Formed in Ag-In Electrodeposits 银银电沉积中形成的分形图案
The Open Electrochemistry Journal Pub Date : 2009-07-31 DOI: 10.2174/1876505X00901010028
M. Saitou, H. Ota, S. Hossain
{"title":"Fractal Pattern Formed in Ag-In Electrodeposits","authors":"M. Saitou, H. Ota, S. Hossain","doi":"10.2174/1876505X00901010028","DOIUrl":"https://doi.org/10.2174/1876505X00901010028","url":null,"abstract":"We investigated pattern formation in Ag-In electrodeposition by constructing a morphology diagram that indicates the presence of pattern at a current density and cathode potential. The patterns that emerge as a fishbone and tree are found to have a fractal property. As the current density increases, the fishbone-like pattern with a fractal dimension of 1.44 changes into the tree-like pattern with a fractal dimension of 1.64. The increase in the fractal dimension is related to an increase in the number of branch in the pattern.","PeriodicalId":23074,"journal":{"name":"The Open Electrochemistry Journal","volume":"1 1","pages":"28-31"},"PeriodicalIF":0.0,"publicationDate":"2009-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78497075","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Electro-Oxidation of Ethanol and Propanol at Pt and Ti Modified Nanoparticle Substrates for Direct Alcohol Fuel Cells (DAFCs) 直接醇燃料电池(DAFCs)中Pt和Ti修饰纳米颗粒底物上乙醇和丙醇的电氧化
The Open Electrochemistry Journal Pub Date : 2009-07-31 DOI: 10.2174/1876505X00901010019
H. Hassan
{"title":"Electro-Oxidation of Ethanol and Propanol at Pt and Ti Modified Nanoparticle Substrates for Direct Alcohol Fuel Cells (DAFCs)","authors":"H. Hassan","doi":"10.2174/1876505X00901010019","DOIUrl":"https://doi.org/10.2174/1876505X00901010019","url":null,"abstract":"Modified Pt and Ti substrates were prepared by electrodeposition of nanocrystallite Pt and Ptx-Sny catalysts for electro-oxidation of ethanol, 1-propanol and 2-propanol. The chemical composition, the phase structure and the surface morphology of the Pt and Ptx-Sny electrodeposits were studied by X-ray diffractometer (XRD), energy dispersive X-ray spectroscopy (EDX) and scanning electron microscope (SEM). Their electro-catalytic activities were studied in 0.5 M H2SO4 by cyclic votlammetry and chronoamperometric techniques. It was found that, the nature of the substrate significantly affects the performance of the prepared catalyst towards electro-oxidation of different alcohols. Accordingly, the modified Pt substrates display enhanced catalytic activity and a higher stability towards alcohols electro-oxidation compared to the modified Ti substrates. Steady state Tafel plots experiments showed smoother and higher rate of alcohols oxidation on the modified Pt substrates than that on the modified Ti. High anodic Tafel slopes >200 for 1-propanol and 2- propanol electro-oxidation were obtained on Ti modified substrates indicating the complexity of the oxidation reaction on such electrodes.","PeriodicalId":23074,"journal":{"name":"The Open Electrochemistry Journal","volume":"1 1","pages":"19-27"},"PeriodicalIF":0.0,"publicationDate":"2009-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79196889","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Kinetic Study of the Hydrogen Oxidation Reaction on Membrane CoatedElectrodes. Part I: Theoretical Aspects 膜电极上氢氧化反应的动力学研究。第一部分:理论方面
The Open Electrochemistry Journal Pub Date : 2009-04-20 DOI: 10.2174/1876505X00901010049
C. Marozzi, M. R. G. Chialvo, A. Chialvo
{"title":"Kinetic Study of the Hydrogen Oxidation Reaction on Membrane CoatedElectrodes. Part I: Theoretical Aspects","authors":"C. Marozzi, M. R. G. Chialvo, A. Chialvo","doi":"10.2174/1876505X00901010049","DOIUrl":"https://doi.org/10.2174/1876505X00901010049","url":null,"abstract":"A generalized theoretical analysis of the kinetics of the hydrogen oxidation reaction under the Volmer- Heyrovsky-Tafel mechanism on an electrode covered by polymeric films is presented. The treatment includes the diffusion of the molecular hydrogen through the electrolyte solution, as well as through the different layers and interfaces. On the light of the resulting expressions, the applicability of the Levich-Koutecky diagrams for the determination of the kinetic current densities was critically analyzed.","PeriodicalId":23074,"journal":{"name":"The Open Electrochemistry Journal","volume":"1 1","pages":"49-55"},"PeriodicalIF":0.0,"publicationDate":"2009-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72838277","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Electrochemical Study of Some Substituted Chromene Derivatives in Nonaqueous Media at Pt, Au and Glassy Carbon Electrodes 非水介质中某些取代铬衍生物在铂、金和玻碳电极上的电化学研究
The Open Electrochemistry Journal Pub Date : 2009-04-01 DOI: 10.2174/1876505X00901010008
A. E. Maghraby
{"title":"Electrochemical Study of Some Substituted Chromene Derivatives in Nonaqueous Media at Pt, Au and Glassy Carbon Electrodes","authors":"A. E. Maghraby","doi":"10.2174/1876505X00901010008","DOIUrl":"https://doi.org/10.2174/1876505X00901010008","url":null,"abstract":"The redox characteristics of some substituted chromene derivatives has been investigated in different nonaque- ous solvents such as, 1,2- dichloroethane (DCE), dichloromethane (DCM) and acetonitrile (AN) using 0.1mol dm -3 tetrabutylammonium perchlorate (TBAP) as a supporting electrolyte at platinum, gold and glassy carbon electrodes, using cyclic voltammetry. Through controlled potential electrolysis (CPE), the product of oxidation and reduction can be sepa- rated and identified. The product of oxidation was found to be the corresponding bis-compound. On the other hand, the reduction occurs in a single two electron process to give the dianion, which abstracts protons to saturate the (-C=O) bond. The effect of substituents on the redox mode of an electroactive site has also been studied.","PeriodicalId":23074,"journal":{"name":"The Open Electrochemistry Journal","volume":"31 1","pages":"8-14"},"PeriodicalIF":0.0,"publicationDate":"2009-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84387981","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
L-Dopa as Corrosion Inhibitor for Mild Steel in Mineral Acid Medium 左旋多巴作为低碳钢在无机酸介质中的缓蚀剂
The Open Electrochemistry Journal Pub Date : 2009-04-01 DOI: 10.2174/1876505X00901010015
H. Sachin, M. H. Khan, S. Raghavendra, N. S. Bhujangaiah
{"title":"L-Dopa as Corrosion Inhibitor for Mild Steel in Mineral Acid Medium","authors":"H. Sachin, M. H. Khan, S. Raghavendra, N. S. Bhujangaiah","doi":"10.2174/1876505X00901010015","DOIUrl":"https://doi.org/10.2174/1876505X00901010015","url":null,"abstract":"Corrosion inhibition of mild steel was studied using L-Dopa in aqueous hydrochloric acid and sulphuric acid so- lutions. The corrosion behaviours of the steel specimen in the presence of inhibitor weret studied by galvanostatic polari- zation and weight loss techniques. The measured electrochemical data indicated good inhibition of corrosion in both the corrosive medium in presence of L-DOPA. The corrosion inhibition may be explained on the basis of adsorption and for- mation of surface film of L-DOPA on the metal surface. The surface of the steel specimen subjected to electrochemical corrosion in the presence and absence of the inhibitor was studied using scanning electron microscopic images. In the present investigation, L-DOPA is used as corrosion inhibitor for mild steel in aqueous hydrochloric acid and sulphuric acid solutions. The corrosion inhibition efficiency of the compound is studied by potentiodynamic polarization and weight loss studies. The surface morphology of the metal surface before and after corrosion is studied by SEM images. 2. EXPERIMENTAL Analytical Reagent (AR) grade chemicals (sd. fine chemicals, Mumbai) were used for the study. The aqueous solution of sulphuric acid and hydrochloric acid was used as the corrosive media. L-dopa was used as received and the structure of the L-dopa was used as corrosion inhibitor is as shown in Fig. (1).","PeriodicalId":23074,"journal":{"name":"The Open Electrochemistry Journal","volume":"5 1","pages":"15-18"},"PeriodicalIF":0.0,"publicationDate":"2009-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84074562","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 8
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