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Ti/TiO_2-Pt修饰电极的制备及电催化性能研究 认领 引用 被引量：8
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作者 秦亮 陶杰 +1 位作者 王玲 陶海军 《稀有金属材料与工程》 SCIE EI CAS 北大核心 2007年第10期1870-1873,共4页
为了提高Ti/TiO2电极的催化性能,采用阳极氧化法在钛基体上制备出具有纳米管状的多孔Ti/TiO2薄膜,在此膜上采用阴极电化学沉积方法沉积Pt来制备Ti/TiO2-Pt修饰电极。用XRD,FESEM分析了沉积前后成分、晶相结构以及表面形貌的变化。结果表... 为了提高Ti/TiO2电极的催化性能,采用阳极氧化法在钛基体上制备出具有纳米管状的多孔Ti/TiO2薄膜,在此膜上采用阴极电化学沉积方法沉积Pt来制备Ti/TiO2-Pt修饰电极。用XRD,FESEM分析了沉积前后成分、晶相结构以及表面形貌的变化。结果表明:Pt优先沉积在Ti/TiO2管口以及管边缘处。用循环伏安曲线和极化曲线分析表明,沉积Pt的Ti/TiO2电极其电催化性能得到了明显改善。 展开更多
关键词 Ti/TiO2-Pt修饰电极 电催化 电沉积Pt 阳极氧化
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乙二醛在Ti/纳米TiO_2-Pt修饰电极上的电催化氧化 认领 引用 被引量：5
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作者 褚道葆 何建国 +5 位作者 侯源源 徐迈 王树西 王建 查龙武 张雪娇 《物理化学学报》 SCIE CAS 北大核心 2009年第7期1434-1438,共5页
采用溶胶-凝胶和电沉积法制备Ti基纳米TiO2-Pt(Ti/纳米TiO2-Pt)修饰电极.X射线衍射(XRD)表明纳米TiO2为锐钛矿型,扫描电镜(SEM)显示Pt纳米粒子在纳米TiO2多孔膜的表面呈现簇分散状态,平均粒径约25nm.通过循环伏安(CV)和计时电流法研究了... 采用溶胶-凝胶和电沉积法制备Ti基纳米TiO2-Pt(Ti/纳米TiO2-Pt)修饰电极.X射线衍射(XRD)表明纳米TiO2为锐钛矿型,扫描电镜(SEM)显示Pt纳米粒子在纳米TiO2多孔膜的表面呈现簇分散状态,平均粒径约25nm.通过循环伏安(CV)和计时电流法研究了Ti/纳米TiO2-Pt修饰电极对乙二醛直接电氧化的电催化活性,结果表明,修饰电极对乙二醛的直接电氧化呈现良好的催化活性,在0.60和1.23V(vsSCE)出现两个氧化峰,二者电流密度分别为16和42mA·cm-2,约为纯Pt电极的2倍和1.5倍,反应过程受浓差扩散控制. 展开更多
关键词 电催化 Ti/纳米TiO2-Pt修饰电极 直接氧化 乙二醛 乙醛酸
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Photoelectrocatalytic Oxidation of Ethinylestradiol on a Ti/TiO2Electrode: Degradation Efficiency and Search for By-Products 认领 引用
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作者 Karla Moreira Vieira Fabiana Maria Monteiro Paschoal +2 位作者 Maria Valnice Boldrin Zanoni Clésia Cristina Nascentes Rodinei Augusti 《Green and Sustainable Chemistry》 2014年第3期151-161,共11页
The degradation of ethinylestradiol (EE, an orally bio-active estrogen) in an aqueous-methanolic solution using a Ti/TiO2 thin-film electrode and UV radiation (a photoelectrocatalytic system) was evaluated. Hence, HPL... The degradation of ethinylestradiol (EE, an orally bio-active estrogen) in an aqueous-methanolic solution using a Ti/TiO2 thin-film electrode and UV radiation (a photoelectrocatalytic system) was evaluated. Hence, HPLC/UV analysis shows that EE (at 0.34 mmol) is totally consumed after 30 minutes of exposure to the photoelectrocatalytic system in the presence of Na2SO4 (0.1 mol·L-1) and with an applied bias potential of +1.0 V versus the Ag/AgCl reference electrode. Moreover, monitoring by direct infusion electrospray ionization mass spectrometry (ESI-MS) and SPME-GC/ MS (solid phase microextraction coupled with gas chromatography-mass spectrometry) reveals that apparently no degradation products are formed under these conditions. Hence, this study demonstrates that the photoelectrocatalytic system can be efficiently used to promote the complete degradation (and likely mineralization) of this hormone under these conditions. 展开更多
关键词 Photoelectrocatalytic Oxidation Ethinylestradiol Ti/TiO2 Thin-Film Electrode Degradation Efficiency Search for By-Products
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Resistive Switching Memory of TiO2 Nanowire Networks Grown on Ti Foil by a Single Hydrothermal Method 认领 引用 被引量：4
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作者 Ming Xiao Kevin P.Musselman +1 位作者 Walter W.Duley Norman Y.Zhou 《Nano-Micro Letters》 SCIE EI CAS 2017年第2期23-31,共9页
The resistive switching characteristics of TiO_2 nanowire networks directly grown on Ti foil by a single-step hydrothermal technique are discussed in this paper. The Ti foil serves as the supply of Ti atoms for growth... The resistive switching characteristics of TiO_2 nanowire networks directly grown on Ti foil by a single-step hydrothermal technique are discussed in this paper. The Ti foil serves as the supply of Ti atoms for growth of the TiO_2 nanowires, making the preparation straightforward. It also acts as a bottom electrode for the device. A top Al electrode was fabricated by e-beam evaporation process. The Al/TiO_2 nanowire networks/Ti device fabricated in this way displayed a highly repeatable and electroforming-free bipolar resistive behavior with retention for more than 10~4 s and an OFF/ON ratio of approximately 70. The switching mechanism of this Al/TiO_2 nanowire networks/Ti device is suggested to arise from the migration of oxygen vacancies under applied electric field. This provides a facile way to obtain metal oxide nanowire-based Re RAM device in the future. 展开更多
关键词 TiO2 nanowire networks Resistive switching memory Ti foil Hydrothermal process Al electrode
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Electrolytic Fixation of CO_2 by Electrocarboxylation of RX on Nanocrystalline TiO_2-Pt Cathode 认领 引用 被引量：2
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作者 褚道葆 李晓华 +1 位作者 刘心元 姚文俐 《Chinese Journal of Chemistry》 SCIE CAS 2004年第11期1231-1234,共4页
Electrolytic fixation of CO2 was investigated by electrocarboxylation of organic halides (RX), and four esters (I, II, III, IV) were obtained in moderate yields. Electrochemical reduction esterifications of RX in the ... Electrolytic fixation of CO2 was investigated by electrocarboxylation of organic halides (RX), and four esters (I, II, III, IV) were obtained in moderate yields. Electrochemical reduction esterifications of RX in the presence of CO2 were carried out on nanocrystalline TiO2-Pt electrode. The electrochemical behavior of RX in the presence of CO2 was investigated by the technique of cyclic voltammetry, and the probable reaction mechanism was proposed. 展开更多
关键词 CO2 nanocrystalline TiO2-Pt electrode electrocarboxylation organic halide (RX) ester
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