1 Vol. 16 No ELECTROCHEMISTRY Feb nanotio 2 Pb /nanotio S-2150 HITACHI Sn + SnCl 4 SnCl 2 3-4

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1 16 1 Vol 16 No ELECTROCHEMISTRY Feb 2010 L- Pb /nanotio * Pb Ti TiO 2 Pb /nanotio 2 SEM Pb TiO 2 L- Pb /nanotio 2 L- L- Pb /nanotio 2 L- O646 A L- Pb α- nanotio 2 Pb /nanotio 2 L- L- Pb /nanotio L- a- CHI 660A USA CH Instru- ment LK 2005 HYL-A / S-2150 HITACHI Sn + SnCl 4 SnCl NaF Na 2 SO 4 H 2 SO 4 CH 3 COONH 4 CH 3 COO 2 Pb Pb OH 2 HCl L- L- Pb Pb Pb /nanotio 2 1 Ti HF 1 4 by Vol 1 min NaF 0 5% by mass Na 2 SO 4 1 mol L - 1 H 2 SO mol L V * Tel dbchu@ sina com KJ2007A010

2 V /min 40 V 80 nm XRD 30 min nanotio Pb Ti nanotio 2 CH 3 COO 2 Pb Pb OH 2 10 g L CH 3 COONH 4 80 g L Pb / nanotio Pb /nanotio 2 nanotio cm 2 Pt SCE L- + 1 mol L Pb /nanotio 2 XRD SEM 1 Pb /nanotio 2 XRD Pb TiO 2 Scherrer Pb TiO 2 80 nm 40 nm 2 Fig 2 nanotio 2 a Pb /nanotio 2 b SEM SEM photographs of nanoporous TiO 2 film a Pb / nanotio 2 film b 1 Fig 1 Pb /nanotio 2 XRD XRD pattern of Pb /nanotio 2 film electrode 2 2 Pb /nanotio 2 CV 3 Pb /nanotio 2 a 1 mol L - 1 HCl V V Pb 2 + /Pb 2 nanotio 2 a Pb /nanotio 2 b SEM nanotio 2 Pb e - Pb 1 40 L- b nm Pb L- Pb

3 1 L- Pb /nanotio Fig 3 Pb /nanotio 2 a ~ e TiO 2 f L- CV a Pb /nanotio 2 1 mol L - 1 HCl b 0 1 mol L - 1 L mol L - 1 HCl c 0 2 mol L - 1 L- + 1 mol L - 1 HCl d 0 3 mol L - 1 L- + 1 mol L - 1 HCl e 0 5 mol L - 1 L- + 1 mol L - 1 HCl f TiO mol L - 1 L- + 1 mol L - 1 HCl 005 V s - 1 Cyclic voltammograms of Pb /nanotio 2 a ~ e and nanotio 2 film f electrodes in L-cystine solution solution composition a 1 mol L - 1 HCl b 0 1 mol L - 1 L-cystine + 1 mol L - 1 HCl c 0 2 mol L - 1 L-cystine + 1 mol L - 1 HCl d 0 3 mol L - 1 L-cystine + 1 mol L - 1 HCl e 0 5 mol L - 1 L-cystine + 1 mol L - 1 HCl f 0 1 mol L - 1 L- cystine + 1 mol L - 1 HCl scan rate 0 05 V s a c Pb TiO 2 8 min d Pb TiO 2 Pb TiO 2 Pb Pb Pb L- 4 Pb /nanotio 2 1 mol b ~ e Pb /nanotio 2 L- L - 1 HCl mol L - 1 CV CV L- Fig 4 Cyclic voltammograms of Pb /nanotio 2 film electrode in 1 mol L - 1 hydrochloric acid HCl mol L - 1 L-cystine electrodeposition time a ~ d /min scan rate 0 05 V s L- Pb /nanotio L- 5 Pb /nanotio TiO mol L - 1 HCl f mol L - 1 L- Pb Pb i p i p υ 1 /2 Pb L- / V i p = α 1 /2 AC * 0 D 1 /2 o υ 1 /2 2

4 i p A cm 2 D o cm 2 s - 1 C * 0 mol L - 1 HCl V 60 min 5 Pb /nanotio 2 1 mol L - 1 HCl mol Fig 6 Chronoamperometric curve of the Pb /nanotio 2 film L - 1 L- electrode at V in 1 mol L - 1 HCl mol L - 1 L-cystine for 60 min Fig 5 Cyclic voltammograms of Pb /nanotio 2 film electrode in 1 mol L - 1 hydrochloric acid HCl mol L - 1 L-cystine at different scan rate /mv s - 1 a 50 b 100 c 200 d 300 the inset shows the peak current as a function of square root of scan rate mol L!1 υ mv s - 1 α Pb /nanotio mol L - 1 L- 3 Daobao Chu Mai Xu Jia Lu et al Electrocatalytic reduction of diethyl oximinomalonate at a Ti / nanoporous + 1 mol L - 1 HCl TiO 2 electrode J Electrochem Commun V 60 min Ronan Baron1 André Darchen Didier Hauchard Electrocatalytic reduction of tert-butyl hydroperoxide at 50 s 6 ma cm - 2 iron 60 min 5 ma cm Ralph T R Hitchman M L Millington J P et al The reduction of L-cystine hydrochloride at lead using static Pb /nanotio 2 L- 3 6 Qingwei Chen Dongsheng Xu Zhongyun Wu et al Fr-ee-standing TiO Pb nanotio 2 2 nanotube arrays made by anodic oxidation and ultrasonic splitting J Nanotechnology V 6 min Pb / 7 Chu C L Wang R M Yin L H et al Effects of anodic nanotio 2 L- oxidation in H 2 SO 4 electrolyte on the biocompatibility of NiTi shape memory alloy J Materials Letters Pb /nanotio mol L - 1 L- + 1 References 1 Rong Guo Zhongchun Li Tianqing Liu Catalysis of the electrochemical oxidation of L-cysteine by lyotropic mesophases J Colloid Polym Sci LI Zhong-Chun LIU Tian-Qing GUO Rong Electrochemical oxidation of L-cysteine in sodium dodecyl sulfate admicelles J Chinese J Chem electrodes J Electrochim Acta and rotating disc electrodes J Electroanal Chem

5 1 L- Pb /nanotio Dae-Jin Yang Hun Park Seong-Je Cho et al TiO 2 -nanotube-based dye-sensitized solar cells fabricated by an efficient anodic oxidation for high surface area J Journal of Physics and Chemistry of Solids Zhang Bao-cheng Electroplating technology M Beijing Beijing University of Aeronautics and Astronautics Press Zheng Huajun Ma Chunan Wang Wei et al Nanorod tungsten carbide thin film and its electrocatalytic activity for nitromethane electroreduction J Electrochem Commun Innocenzo G Casella Michela Contursi Electrocatalytic reduction of chlorophenoxy acids at palladium-modified glassy carbon electrodes J Electrochim Acta Chu Dao-bao Yin Xiao-juan Feng De-xiang et al Electrocatalytic oxidation of ethanol on Pt /nanotio 2 -CNT complex catalysts J Acta Phys Chim Sin Gu Jia-shan Chu Dao-bao Zhou Xing-fu et al Heterogeneous electrocatalytic reduction of maleic acid on nanocrystalline TiO 2 Film modified Ti electrode J Acta Chimica Sinica Allen J Bard Larry R Faulkenr Electrochemical methods fundamentals and applications M Beijing Chemical Industry Press Electrocatalytic Reduction of L-cystine at Pb /nanotio 2 Film Electrode CHU Dao-bao 1* WANG Feng 1 2 XIAO Ying 1 ZHANG Xue-jiao 1 1 Anhui Key Laboratory of Functional Molecular Solids & Molecular Based Materials College of Chemistry and Materials Science Anhui Normal University Wuhu Anhui China 2 Department of chemistry Vocational and Technical College of Fuyang Fuyang Anhui China Abstract The nanoporous Ti-based TiO 2 films electrodes modified with Pb particles Pb /nanotio 2 were prepared by using anodization and potentiostatic electro-deposition The optimum deposition conditions were determined by comparing with various deposition potentials and time The SEM analyses indicated that the TiO 2 films were homogeneous nanoporous structure and the Pb particles well dispersed on the TiO 2 films The L-cystine electrocatalytic activity reduction on the Pb /nanotio 2 film electrodes was investigated by cyclic voltammetry and Chronoamperometric curves The results showed that this type of the electrode posseses high acticity and stability Key words L-cystine electrocatalytic reduction Pb /nanotio 2 film electrode L-cysteine electrodeposition