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Anode oxidation of HCHO in THPED-containing electroless copper plating solution 认领 引用 被引量：2
1
作者 郑雅杰 肖发新 +1 位作者 邹伟红 王勇 《Journal of Central South University of Technology》 2008年第5期669-673,共5页
The electrochemical mechanism of anode oxidation of HCHO in electroless copper plating solution with N, N, N′, N′-tetrakis(2-hydroxypropyl)ethylenediamine (THPED) was investigated by measuring cyclic voltammetry cur... The electrochemical mechanism of anode oxidation of HCHO in electroless copper plating solution with N, N, N′, N′-tetrakis(2-hydroxypropyl)ethylenediamine (THPED) was investigated by measuring cyclic voltammetry curves and anodic polarization curves. Three different oxidation peaks occur at the potentials of -0.62 V (Peak 1), -0.40 V (Peak 2) and -0.17 V (Peak 3) in the anode oxidation process of THPED-containing solution. The reaction at Peak 1, a main oxidation reaction, is the irreversible reaction of adsorbed HCHO with hydrogen evolution. The reaction at Peak 2, a secondary oxidation reaction, is the quasi-reversible reaction of adsorbed HCHO without hydrogen evolution. The reaction at Peak 3 is the irreversible oxidation of anode copper. The current density of Peak 1 increases gradually, that of Peak 2 remains constant and that of Peak 3 decreases with the increase of HCHO concentration. The current density of Peak 3 increases with the increase of THPED concentration and the complexation of THPED promotes the dissolution of anode copper. 展开更多
关键词 electroless copper plating anode oxidation THPED HCHO electrochemical mechanism
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Beyond ammonia-oxidizing bacteria-centric paradigms:Geobacter-assisted anodic anaerobic ammonia oxidation 认领 引用
2
作者 Decong Zheng Daping Li Jingting Wang 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2026年第5期399-408,共10页
Anodic anaerobic ammonium oxidation(anodic anammox)presents a sustainable approach for nitrogen removal,yet its bioelectrochemical mechanisms remain unclear due to biofilm complexity and undefined roles of electroacti... Anodic anaerobic ammonium oxidation(anodic anammox)presents a sustainable approach for nitrogen removal,yet its bioelectrochemical mechanisms remain unclear due to biofilm complexity and undefined roles of electroactive microorganisms(EAMs).This study reveals that nitrite(NO2-)is the direct product of ammonia-oxidizing bacteria(AOB)-driven anodic anammox,with extracellular electron transfer(EET)mediated by indirect mechanisms via redox shuttles.Metagenomic analysis identified two ammonia oxidation pathways:(1)a novel short-range nitrification pathway(NH4+→NO2-)governed by ncd2 genes,and(2)a traditional ammonia oxidation pathway(NH4+→NH2OH)facilitated by amoABC.Intriguingly,Geobacter exhibited potential NH2OH oxidation capability,bridging AOB activity and electrode respiration.Functional inhibition experiments demonstrated that EAMs-derived electron shuttles and reactive oxygen species(ROS)are critical for enhancing EET efficiency,with ROS serving as a key electron acceptor for AOB under anaerobic conditions.Spatial and metabolic synergy between EAMs and AOB—via substrate cross-feeding,cofactor provision,and electron transfer—was essential for maintaining biofilm stability.These findings challenge the conventional view of AOB-driven anodic anaerobic anammox mechanisms and provide new insights into sustainable nitrogen removal in engineered bioelectrochemical systems. 展开更多
关键词 Microbial electrolysis cell Anodic ammonia oxidation Electron transfer mechanism Electroactive microorganisms Ammonia-oxidizing bacteria
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Enhancing capacitive deionization performance and cyclic stability of nitrogen-doped activated carbon by the electro-oxidation of anode materials 认领 引用 被引量：3
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作者 Xiaona Liu Baohua Zhao +6 位作者 Yanyun Hu Luyue Huang Jingxiang Ma Shuqiao Xu Zhonglin Xia Xiaoying Ma Shuangchen Ma 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2024年第5期23-33,共11页
Electrode materials with high desalination capacity and long-term cyclic stability are the focus of capacitive deionization(CDI) community. Understanding the causes of performance decay in traditional carbons is cruci... Electrode materials with high desalination capacity and long-term cyclic stability are the focus of capacitive deionization(CDI) community. Understanding the causes of performance decay in traditional carbons is crucial to design a high-performance material. Based on this, here, nitrogen-doped activated carbon(NAC) was prepared by pyrolyzing the blend of activated carbon powder(ACP) and melamine for the positive electrode of asymmetric CDI. By comparing the indicators changes such as conductivity, salt adsorption capacity, pH, and charge efficiency of the symmetrical ACP-ACP device to the asymmetric ACP-NAC device under different CDI cycles, as well as the changes of the electrochemical properties of anode and cathode materials after long-term operation, the reasons for the decline of the stability of the CDI performance were revealed. It was found that the carboxyl functional groups generated by the electro-oxidation of anode carbon materials make the anode zero-charge potential(Epzc) shift positively,which results in the uneven distribution of potential windows of CDI units and affects the adsorption capacity. Furthermore, by understanding the electron density on C atoms surrounding the N atoms, we attribute the increased cyclic stability to the enhanced negativity of the charge of carbon atoms adjacent to quaternary-N and pyridinic-oxide-N. 展开更多
关键词 Anodic oxidation Capacitive deionization Cyclic stability N-doping
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The contribution of mediated oxidation mechanisms in the electrolytic degradation of cyanuric acid using diamond anodes 认领 引用
4
作者 Nasr Bensalah Sondos Dbira Ahmed Bedoui 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2016年第7期115-123,共9页
In this work, the contribution of mediated oxidation mechanisms in the electrolytic degradation of cyanuric acid using boron-doped diamond（BDD） anodes was investigated in different electrolytes. A complete mineraliz... In this work, the contribution of mediated oxidation mechanisms in the electrolytic degradation of cyanuric acid using boron-doped diamond（BDD） anodes was investigated in different electrolytes. A complete mineralization of cyanuric acid was obtained in Na Cl;however lower degrees of mineralization of 70% and 40% were obtained in Na2SO4 and Na Cl O4, respectively. This can be explained by the nature of the oxidants electrogenerated in each electrolyte. It is clear that the contribution of active chlorine（Cl2, HCl O, Cl O-）electrogenerated from oxidation of chlorides on BDD is much more important in the electrolytic degradation of cyanuric acid than the persulfate and hydroxyl radicals produced by electro-oxidation of sulfate and water on BDD anodes. This could be explained by the high affinity of active chlorine towards nitrogen compounds. No organic intermediates were detected during the electrolytic degradation of cyanuric acid in any the electrolytes, which can be explained by their immediate depletion by hydroxyl radicals produced on the BDD surface. Nitrates and ammonium were the final products of electrolytic degradation of cyanuric acid on BDD anodes in all electrolytes. In addition, small amounts of chloramines were formed in the chloride medium. Low current density（≤ 10 m A/cm2） and neutral medium（p H in the range 6–9） should be used for high efficiency electrolytic degradation and negligible formation of hazardous chlorate and perchlorate. 展开更多
关键词 Electrolytic degradation Diamond anode Supporting electrolyte Mediated oxidation Cyanuric acid
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Porous cathode enables continuous flow anodic oxidation for water purification:Performance and mechanisms 认领 引用
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作者 Runsheng Xu Haotian Wu +3 位作者 Daoyuan Zu Kui Yang Xiangtong Kong Jinxing Ma 《Chinese Chemical Letters》 SCIE CAS CSCD 2025年第8期655-660,共6页
Flow anodic oxidation system has demonstrated to be a promising and environmental benign water treatment technology because of its advantages of high contaminant removal efficiency and low energy consumption.However,t... Flow anodic oxidation system has demonstrated to be a promising and environmental benign water treatment technology because of its advantages of high contaminant removal efficiency and low energy consumption.However,traditional setup needs an external unit for flow anode material separation and recovery,which inevitably increases the capital cost and hinders its continuous operation.Herein,a specific porous cathode is introduced to achieve continuous water purification with high contaminant removal in a flow anodic oxidation system.The efuent concentration of carbamazepine(CBZ),a common and model contaminant widely detected in natural water environment,was reduced by 99%.The linear sweep voltammetry(LSV)and quenching tests demonstrated that HO·was the dominant reactive species.While the removal of contaminants was inhibited in practical surface water,largely related to the quenching by dissolved organic matter and bicarbonate,the flow anodic oxidation process was competent in alleviating the ecotoxicity following oxidation.Our study constructs a modular device for cost-effective continuous water purification and provides insight into the mechanisms of flow andic oxidation. 展开更多
关键词 Water purification Flow anodic oxidation Porous cathode Magneli phase titanium suboxide Carbamazepine
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Control of Pore Nucleation and Rearrangement Kinetics During Aluminium Anodizing in Phosphoric Acid Electrolyte 认领 引用
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作者 Ilya V.Roslyakov Nikita A.Shirin +4 位作者 Dmitry M.Tsymbarenko Sergei N.Pavlov Sergey E.Kushnir Nikolay V.Lyskov Kirill S.Napolskii 《电化学（中英文）》 CAS 北大核心 2026年第2期61-72,共12页
Anodic aluminium oxide(AAO)porous films with an interpore distance of several hundred nanometers are of great interest due to their unique interaction with visible and near-infrared light,and high thermal stability up... Anodic aluminium oxide(AAO)porous films with an interpore distance of several hundred nanometers are of great interest due to their unique interaction with visible and near-infrared light,and high thermal stability up to 1500°C.These porous films are prepared by aluminium anodizing at high voltages in weak acids,leading to a slow kinetics of initial stages of porous structure formation.Here,we propose an approach to accelerate AAO formation in electrolytes based on weak acids such as phosphoric acid.Aluminium foils,pre-patterned using first anodizing under different conditions and subsequent selective dissolution of a sacrificial AAO layer,were utilized as substrates.The morphology of the aluminium surface,including surface roughness and height of pyramidal spikes,plays a crucial role in the pore nucleation and rearrangement process during the second anodizing.In particular,by first anodizing in strong acid electrolytes at low voltages(such as 0.3 mol·L-1sulfuric acid at 25 V),it is possible to double the rate of pore nucleation and subsequent reach of the steady-state regime during second anodizing in phosphoric acid.As a result,about 2 hours can be saved during the two-step anodizing process in phosphoric acid if a strong acid electrolyte is used for the first anodizing to pre-pattern aluminium surface. 展开更多
关键词 Anodic aluminium oxide Kinetics Two-step anodizing Phosphoric acid Electrochemical pre-patterning
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Effect of intermetallic phases on the anodic oxidation and corrosion of 5A06 aluminum alloy 认领 引用 被引量：11
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作者 Song-mei Li Ying-dong Li +2 位作者 You Zhang Jian-hua Liu Mei Yu 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2015年第2期167-174,共8页
Intermetallic phases were found to influence the anodic oxidation and corrosion behavior of 5A06 aluminum alloy. Scattered in- termetallic particles were examined by scanning electron microscopy （SEM） and energy dis... Intermetallic phases were found to influence the anodic oxidation and corrosion behavior of 5A06 aluminum alloy. Scattered in- termetallic particles were examined by scanning electron microscopy （SEM） and energy dispersive spectroscopy （EDS） after pretreatment. The anodic film was investigated by transmission electron microscopy （TEM）, and its corrosion resistance was analyzed by electrochemical impedance spectroscopy （EIS） and Tafel polarization in NaC1 solution. The results show that the size of A1-Fe-Mg-Mn particles gradually decreases with the iron content. During anodizing, these intermetallic particles are gradually dissolved, leading to the complex porosity in the anodic film beneath the particles. After anodizing, the residual particles are mainly silicon-containing phases, which are embedded in the an- odic film. Electrochemical measurements indicate that the porous anodic film layer is easily penetrated, and the barrier plays a dominant role in the overall protection. Meanwhile, self-healing behavior is observed during the long immersion time. 展开更多
关键词 aluminum alloys intermetallic particles anodic oxidation corrosion protective films
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Nickel-free sealing technology for anodic oxidation film of aluminum alloy at room temperature 认领 引用 被引量：12
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作者 Xue-Long Hao Ning Zhao +2 位作者 Hong-Hai Jin Wen Ma Dong-Hui Zhang 《Rare Metals》 SCIE EI CAS CSCD 2021年第4期968-974,共7页
Different additives were added into the potassium fluorozirconate solution to prepare different nickelfree sealing reagents,with which the anodic oxidation film of aluminum alloy was sealed at room temperature.The pho... Different additives were added into the potassium fluorozirconate solution to prepare different nickelfree sealing reagents,with which the anodic oxidation film of aluminum alloy was sealed at room temperature.The phosphor chromic acid weight loss method was used to evaluate the sealing effects.Using electron scanning microscopy(SEM),the surface and cross-sectional micromorphologies of the anodic oxidation films sealed by different fluorozirconate sealants were observed.The position and state of zirconium element distribution in the film hole were investigated by the further quantitative and distribution analysis of Zr element.This study provides an experimental evidence for the theoretical studies of fluorozirconate-sealed anodic oxidation films.It is shown that the fluorozirconate has good sealing effects and has a wide prospect for sealing the aluminum alloy samples.Its products were highly corrosion resistant,and were filled in the openings of the micropores in the oxide film. 展开更多
关键词 Aluminum alloy Anodic oxidation film Nickel-free sealing Fluorozirconate
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Photocatalytic activity of porous TiO2 films prepared by anodic oxidation 认领 引用 被引量：9
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作者 WANG Wei TAO Jie +1 位作者 WANG Tao WANG Ling 《Rare Metals》 SCIE EI CAS 2007年第2期136-141,共6页
Anatase titanium dioxide is an active photocatalyst,however,it is difficult to be immobilized on the substrate.The crystalline TiO2 porous film was prepared directly on the surface of pure titanium by anodic oxidation... Anatase titanium dioxide is an active photocatalyst,however,it is difficult to be immobilized on the substrate.The crystalline TiO2 porous film was prepared directly on the surface of pure titanium by anodic oxidation.The film was then used for photocatalysis via the methyl orange degradation method.The effects of anodization voltage,pH value,TiO2 film area and degradation time on the photocatalyst were investigated respectively by UV-visible spectrum.It was indicated that the TiO2 film prepared by anodic oxidation at 140 V had the best photocatalysis capability and the degradation of methyl orange was accelerated with acid addition. 展开更多
关键词 titanium porous films anodic oxidation photocatalysis methyl orange
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Anodic Oxidation on Structural Evolution and Tensile Properties of Polyacrylonitrile Based Carbon Fibers with Different Surface Morphology 认领 引用 被引量：7
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作者 Zhaorui Li Jianbin Wang +1 位作者 Yuanjian Tong Lianghua Xu 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2012年第12期1123-1129,共7页
Polyacrylonitrile(PAN)based carbon fibers with different surface morphology were electrochemically treated in 3 wt%NH4HCO3 aqueous solution with current density up to 3.47 A/m 2 at room temperature,and surface structu... Polyacrylonitrile(PAN)based carbon fibers with different surface morphology were electrochemically treated in 3 wt%NH4HCO3 aqueous solution with current density up to 3.47 A/m 2 at room temperature,and surface structures,surface morphology and residual mechanical properties were characterized.The crystallite size(La)of carbon fibers would be interrupted due to excessive electrochemical etching,while the crystallite spacing(d(002))increased as increasing current density.The disordered structures on the surface of carbon fiber with rough surface increased at the initial oxidation stage and then removed by further electrochemical etching,which resulting in continuous increase of the extent of graphitization on the fiber surface.However,the electrochemical etching was beneficial to getting ordered morphology on the surface for carbon fiber with smooth surface,especially when the current density was lower than 1.77 A/m 2.The tensile strength and tensile modulus could be improved by 17.27%and 5.75%,respectively,and was dependent of surface morphology.The decreasing density of carbon fibers probably resulted from the volume expansion of carbon fibers caused by the abundant oxygen functional groups intercalated between the adjacent graphite layers. 展开更多
关键词 Carbon fibers Anodic oxidation Structural evolution Tensile property Surface morphology
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Electrochemical behavior of mesh and plate oxide coated anodes during zinc electrowinning 认领 引用 被引量：9
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作者 张伟 Michael ROBICHAUD +1 位作者 Edward GHALI Georges HOULACHI 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2016年第2期589-598,共10页
The catalytic performance of two oxides coated anodes （OCSs） meshes and one OCA plate was investigated in a zinc electrowinning electrolyte at 38 ℃. Their electrochemical behaviors were compared with that of a conv... The catalytic performance of two oxides coated anodes （OCSs） meshes and one OCA plate was investigated in a zinc electrowinning electrolyte at 38 ℃. Their electrochemical behaviors were compared with that of a conventional Pb-0.7%Ag alloy anode. Electrochemical measurements such as cyclic voltammetric, galvanostatic, potentiodynamic, open-circuit potential （OCP） and in situ electrochemical noise measurements were considered. After 2 h of OCP test, the linear polarization shows that the corrosion current density of the Ti/（IrO2-Ta2O5） mesh electrode is the lowest （3.37μA/cm^2） among the three OCAs and shows excellent performance. Additionally, after 24 h of galvanostatic polarization at 50 mA/cm^2and 38 ℃, the Ti/MnO2mesh anode has the highest potential （1.799 V）, followed by the Ti/（IrO2-Ta2O5） plate （1.775 V） and Ti/（IrO2-Ta2O5） mesh （1.705 V） anodes. After 24 h of galvanostatic polarization followed by 16 h of decay, the linear polarization method confirms the sequence obtained after 2 h of OCP test, and the Ti/（IrO2-Ta2O5） mesh attains the lowest corrosion current density. The Ti/（IrO2-Ta2O5） mesh anode also shows better performance after 24 h of galvanostatic polarization with the overpotential lower than that of the conventional Pb-Ag anode by about 245 mV. 展开更多
关键词 oxides coated anode mesh plate electrochemical measurement electrochemical behavior
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Application of advanced oxidation processes for removing salicylic acid from synthetic wastewaters 认领 引用 被引量：7
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作者 Xue Ming Chen Djalma Ribeiro da Silva Carlos A.Martínez-Huitle 《Chinese Chemical Letters》 SCIE CAS 2010年第1期101-104,共4页
In this study,advanced oxidation processes(AOPs)such as anodic oxidation(AO),UV/H_2O2and Fenton processes(FP)were investigated for the degradation of salicylic acid(SA)in lab-scale experiments.Boron-doped diamond(B... In this study,advanced oxidation processes(AOPs)such as anodic oxidation(AO),UV/H_2O2and Fenton processes(FP)were investigated for the degradation of salicylic acid(SA)in lab-scale experiments.Boron-doped diamond(BDD)film electrodes using Ta as substrates were employed for AO of SA.In the case of FP and UV/H_2O2,most favorable experimental conditions were determined for each process and these were used for comparing with AO process.The study showed that the FP was the most effective process under aci... 展开更多
关键词 Advanced oxidation processes Salicylic acid(SA) Anodic oxidation Ta/BDD Electrocatalytic activity
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Electrochemical incineration of dimethyl phthalate by anodic oxidation with boron-doped diamond electrode 认领 引用 被引量：5
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作者 HOU Yining QU Jiuhui +1 位作者 ZHAO Xu LIU Huijuan 《Journal of Environmental Sciences》 SCIE EI CAS 2009年第10期1321-1328,共8页
The anodic oxidation of aqueous solutions containing dimethyl phthalate （DMP） up to 125 mg/L with sodium sulfate （Na2SO4） as supporting electrolyte within the pH range 2.0-10.0 was studied using a one-compartment ... The anodic oxidation of aqueous solutions containing dimethyl phthalate （DMP） up to 125 mg/L with sodium sulfate （Na2SO4） as supporting electrolyte within the pH range 2.0-10.0 was studied using a one-compartment batch reactor employing a boron-doped diamond （BDD） as anode. Electrolyses were carded out at constant current density （1.5-4.5 mA/cm^2）. Complete mineralization was always achieved owing to the great concentration of hydroxyl radical （-OH） generated at the BDD surface. The effects of pH, apparent current density and initial DMP concentration on the degradation rate of DMP, the specific charge required for its total mineralization and mineralization current efficiency were investigated systematically. The mineralization rate of DMP was found to be pH-independent and to increase with increasing applied current density. Results indicated that this electrochemical process was subjected, at least partially, to the mass transfer of organics onto the BDD surface. Kinetic analysis of the temporal change of DMP concentration during electrolysis determined by High Performance Liquid Chromatography （HPLC） revealed that DMP decay under all tested conditions followed a pseudo first-order reaction. Aromatic intermediates and generated carboxylic acids were identified by Gas Chromatography- Mass Spectrometry （GC-MS） and a general pathway for the electrochemical incineration of DMP on BDD was proposed. 展开更多
关键词 dimethyl phthalate anodic oxidation boron-doped diamond mineralization
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Influence of oxidation heat on hard anodic film of aluminum alloy 认领 引用 被引量：8
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作者 魏晓伟 陈朝英 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2012年第11期2707-2712,共6页
The special experimental device and sulfuric acid electrolyte were adopted to study the influence of anodic oxidation heat on hard anodic film for 2024 aluminum alloy. Compared with the oxidation heat transferred to t... The special experimental device and sulfuric acid electrolyte were adopted to study the influence of anodic oxidation heat on hard anodic film for 2024 aluminum alloy. Compared with the oxidation heat transferred to the electrolyte through anodic film, the heat transferred to the coolant through aluminum substrate is more beneficial to the growth of anodic film. The film forming speed, film thickness, density and hardness are significantly increased as the degree of undercooling of the coolant increases. The degree of undercooling of the coolant, which is necessary for the growth of anodic film, is related to the degree of undercooling of the electrolyte, thickness of aluminum substrate, thickness of anodic film, natural parameters of bubble covering and current density. The microstructure and performance of the oxidation film could be controlled by the temperature of the coolant. 展开更多
关键词 aluminum alloy 2024 aluminum alloy oxidation heat sulfuric acid electrolyte hard anodic oxidation anodic film
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Electrochemical anodic oxidation assisted fabrication of memristors 认领 引用 被引量：3
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作者 Shuai-Bin Hua Tian Jin Xin Guo 《International Journal of Extreme Manufacturing》 SCIE EI CAS CSCD 2024年第3期250-272,共23页
Owing to the advantages of simple structure,low power consumption and high-density integration,memristors or memristive devices are attracting increasing attention in the fields such as next generation non-volatile me... Owing to the advantages of simple structure,low power consumption and high-density integration,memristors or memristive devices are attracting increasing attention in the fields such as next generation non-volatile memories,neuromorphic computation and data encryption.However,the deposition of memristive films often requires expensive equipment,strict vacuum conditions,high energy consumption,and extended processing times.In contrast,electrochemical anodizing can produce metal oxide films quickly(e.g.10 s) under ambient conditions.By means of the anodizing technique,oxide films,oxide nanotubes,nanowires and nanodots can be fabricated to prepare memristors.Oxide film thickness,nanostructures,defect concentrations,etc,can be varied to regulate device performances by adjusting oxidation parameters such as voltage,current and time.Thus memristors fabricated by the anodic oxidation technique can achieve high device consistency,low variation,and ultrahigh yield rate.This article provides a comprehensive review of the research progress in the field of anodic oxidation assisted fabrication of memristors.Firstly,the principle of anodic oxidation is introduced;then,different types of memristors produced by anodic oxidation and their applications are presented;finally,features and challenges of anodic oxidation for memristor production are elaborated. 展开更多
关键词 anodic oxidation anodized aluminium oxide memristor resistive switching electrical properties
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EFFECT OF SnO_2 ADDITION ON THE SERVICE LIFE AND ELECTROCHEMICAL PROPERTIES OF Ti/IrO_2,+Ta_2O_5 ANODES IN PHENOLSULFONIC ACID SOLUTION 认领 引用 被引量：3
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作者 J.M. Hu H.M. Meng +2 位作者 D.B. Sun S.J. Zhang J.X. Wu and D.J. Yang Beijing Corrosion and Protection Center, Open Laboratory of Corrosion, Erosion and Surface Technology, University of Science and Technology Beijing, Beijing 100083, China 《Acta Metallurgica Sinica(English Letters)》 EI CAS 2000年第4期937-943,共7页
Service life of two different oxide anodes in phenolsulfonic acid (PSA) solution was investigated by accelerated electrolysis. The durability of Ti/IrO_2+Ta_2 O_5 anode increased by the addition of SnO_2 in the mixed ... Service life of two different oxide anodes in phenolsulfonic acid (PSA) solution was investigated by accelerated electrolysis. The durability of Ti/IrO_2+Ta_2 O_5 anode increased by the addition of SnO_2 in the mixed oxides. The degradation mechanisms of Ti/IrO_2+ Ta_2 O_5 and Ti/IrO_2 +Ta_2 O_5 +SnO+2 anodes were different. It was shown from the observation of scanning electron microscopy (SEM) and the electrochcmical measurement that, the deactivation of Ti/IrO_2 + Ta_2 O_5 anode was due to the build-up of an organic film on surface. The growth of the covered film on surface was restricted by addition of SnO_2, which resulted in increasing of the service life of anodes. The over-potential for oxygen evolution on Ti/IrO_2 +Ta_2 O_5 electrode increased after doping SnO_2, and the intermediate products of PSA building-up on the surface was much more rapidly oxidized. Meanwhile, a certain part of the surface oxide deposit entered into the solution leading to loss of oxides, which resulted in degradation of Ti/IroO_2 + Ta_2 O_5 anode containing SnO_2 component. 展开更多
关键词 metal oxide anode IrO_2 + Ta_2 O_5 IrO_2 + Ta_2 O_5 +SnO_2 phenolsulfonic acid degradation
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Electrocatalysis method for wastewater treatment using a novel beta-lead dioxide anode 认领 引用 被引量：5
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作者 WU Zu-cheng ZHOU Ming-hua +1 位作者 HUANG Zhi-wei WANG Da-hui 《Journal of Zhejiang University Science》 2002年第2期64-68,共5页
A novel β-PbO2 anode modified with fluorine resin was developed for typical pollutant electrocatalytic degradation and wastewater treatment.Various operating parameters such as applied voltage(3.5-10.5 V),pH(2-6),... A novel β-PbO2 anode modified with fluorine resin was developed for typical pollutant electrocatalytic degradation and wastewater treatment.Various operating parameters such as applied voltage(3.5-10.5 V),pH(2-6),salinity of the electrolyte(0.5-2 g/L K2SO4)and initial phenol concentration(100-400 mg/L)were investigated to explore the electrocatalytic ability of the anode by taking phenol as sample.A preliminary study on dyeing wastewater treatment by this method indicated that the biodegradability could be increased to suit subsequent biological treatment.The stability of the anode has been proved to be high against acidity.The anode showed promising application for treatment of wastewater,especially of high salinity and high acidity wastewater. 展开更多
关键词 Electrocatalysis Anodic oxidation Phenol Dyeing wastewater treatment
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Electroless Deposition of Nickel Nanowire and Nanotube Arrays as Supports for Pt-Pd Catalyst for Ethanol Electrooxidation 认领 引用 被引量：1
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作者 杨培霞 张杰 +1 位作者 如磊 安茂忠 《Chinese Journal of Chemical Physics》 SCIE EI CAS CSCD 2015年第2期206-208,I0002,共3页
Nickel nanowire and nanotube arrays as supports for Pt-Pd catalyst were prepared by elec- troless deposition with anodic aluminum oxide template. Pt-Pd composite catalyst was de- posited on the arrays by displacement ... Nickel nanowire and nanotube arrays as supports for Pt-Pd catalyst were prepared by elec- troless deposition with anodic aluminum oxide template. Pt-Pd composite catalyst was de- posited on the arrays by displacement reaction. SEM images show that the nickel nanowires have an average diameter of I00 nm and the nickel nanotubes have an average inner diameter of 200 nm. EDS scanning reveals that elemental Pt and Pd disperse uniformly on the arrays. Cyclic voltammetry study indicates that the nickel nanotube array loaded with Pt-Pd pos- sesses a higher electrochemical activity for ethanol oxidation than the nickel nanowire array with Pt-Pd. 展开更多
关键词 Pt-Pd catalyst Anodic aluminum oxide template Nanomaterials Electrolessdeposition Energy storage and conversion
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CoWO4 nanopaticles wrapped by RGO as high capacity anode material for lithium ion batteries 认领 引用 被引量：3
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作者 Peng Yu Lei Wang +2 位作者 Xu Liu Hong-Gang Fu Hai-Tao Yu 《Rare Metals》 SCIE EI CAS CSCD 2017年第5期411-417,共7页
Transition-metal oxides have attracted increased attention in the application of high-performance lithium ion batteries（LIBs）, owing to its higher reversible capacity,better structural stability and high electronic ... Transition-metal oxides have attracted increased attention in the application of high-performance lithium ion batteries（LIBs）, owing to its higher reversible capacity,better structural stability and high electronic conductivity.Herein, CoWO4 nanoparticles wrapped by reduced graphene oxide（CoWO4–RGO） were synthesized via a facile hydrothermal route followed by a subsequent heat-treatment process. When evaluated as the anode of LIB, the synthetic CoWO4–RGO nanocomposite exhibits better Li^＋ storage properties than pure CoWO4 nanostructures synthesized without graphene oxide（GO）. Specifically, it delivers a high initial specific discharge capacity of1100 mAh·g^-1 at a current density of 100 mA·g^-1, and a good reversible performance of 567 mAh·g^-1 remains after the 100th cycle. Moreover, full battery using CoWO4–RGO as anode and commercial LiCoO2 powder as cathode was assembled, which can be sufficient to turn on a 3 V,10 mW blue light emitting diode（LED）. The enhanced electrochemical performance for lithium storage can be attributed to the three-dimensional（3D） structure of the CoWO4–RGO nanocomposite, which can accommodate huge volume changes, and synergetic effect between CoWO4 and reduced graphite oxide（RGO） nanosheets,including an increased conductivity, shortened Li^＋ diffusion path. 展开更多
关键词 CoWO4 Transition-metal oxide Graphene Li-ion battery Anode
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Synthesis of Micron-sized Hexagonal and Flowerlike Nanostructures of Lead Oxide (PbO_2) by Anodic Oxidation of Lead 认领 引用 被引量：1
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作者 Dinesh Pratap Singh Onkar Nath Srivastava 《Nano-Micro Letters》 SCIE EI CAS 2011年第4期223-227,共5页
Micron sized hexagon- and flower-like nanostructures of lead oxide（α-PbO2） have been synthesized by very simple and cost effective route of anodic oxidation of lead sheet. These structures were easily obtained by t... Micron sized hexagon- and flower-like nanostructures of lead oxide（α-PbO2） have been synthesized by very simple and cost effective route of anodic oxidation of lead sheet. These structures were easily obtained by the simple variation of applied voltage from 2-6 V between the electrodes. Lead sheet was used as an anode and platinum sheet served as a cathode. Anodic oxidation at 2 V resulted in the variable edge sized（1-2 μm） hexagon-like structures in the electrolyte. When the applied potential was increased to 4 V a structure of distorted hexagons consisting of some flower-like structures were obtained. Further increment of potential up to 6 V resulted in flower like structures of α-PbO2 having six petals. The diameter of the flower-like structures was 200-500 nm and the size of a petal was 100-200 nm. 展开更多
关键词 Lead oxide nanostructures Anodic oxidation Hexagon-like structures Flower-like nanostructures
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