16 1 Vol 16 No 1 2010 2 ELECTROCHEMISTRY Feb 2010 L- Pb /nanotio 2 1006-3471 2010 01-0085-05 1* 1 2 1 1 1 241000 2 236000 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 2 1 1 1 1-2 L- a- CHI 660A USA CH Instru- ment LK 2005 HYL-A / S-2150 HITACHI Sn + SnCl 4 SnCl 2 3-4 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 4-5 1 2 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 4 0 5 mol L - 1 10 V 2009-06-22 2009-07-22 * Tel 85-553 3869310 E-mail dbchu@ sina com 20476001 070414160 KJ2007A010
86 2010 2 V /min 40 V 80 nm XRD 30 min nanotio 2 6-8 2 Pb Ti nanotio 2 CH 3 COO 2 Pb Pb OH 2 10 g L - 1 + CH 3 COONH 4 80 g L - 1 9 Pb / nanotio 2 1 3 Pb /nanotio 2 nanotio 2 0 04 cm 2 Pt SCE L- + 1 mol L - 1 2 2 1 Pb /nanotio 2 XRD SEM 1 Pb /nanotio 2 XRD 28 5 31 36 Pb 52 62 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 - 0 65 V - 0 38 V Pb 2 + /Pb 2 nanotio 2 a Pb /nanotio 2 b SEM nanotio 2 Pb 2 + + 2e - Pb 1 40 L- b nm Pb L- Pb
1 L- Pb /nanotio 2 87 3 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- 11-12 + 1 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 2 0 1 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 - 1 4 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 + 0 1 mol L - 1 CV CV L- Fig 4 Cyclic voltammograms of Pb /nanotio 2 film electrode in 1 mol L - 1 hydrochloric acid HCl + 0 1 mol L - 1 L-cystine electrodeposition time a ~ d /min 2 4 6 8 scan rate 0 05 V s - 1 10 L- Pb /nanotio 2 2 3 L- 5 Pb /nanotio TiO 2 2 1 mol L - 1 HCl f + 0 1 mol L - 1 L- Pb Pb i p i p υ 1 /2 Pb L- / 13 14-0 02 V i p = 2 99 10 5 α 1 /2 AC * 0 D 1 /2 o υ 1 /2 2
88 2010 i p A cm 2 D o cm 2 s - 1 C * 0 mol L - 1 HCl - 0 6 V 60 min 5 Pb /nanotio 2 1 mol L - 1 HCl + 0 1 mol Fig 6 Chronoamperometric curve of the Pb /nanotio 2 film L - 1 L- electrode at - 0 6 V in 1 mol L - 1 HCl + 0 1 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 + 0 1 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 2 4 6 Pb /nanotio 2 0 1 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 2008 10-0 6 V 60 min 350 4 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 - 2 5 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 2008 19 365708-0 02 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 2008 62 3512 6 Pb /nanotio 2 0 1 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 2004 283 243 2 LI Zhong-Chun LIU Tian-Qing GUO Rong Electrochemical oxidation of L-cysteine in sodium dodecyl sulfate admicelles J Chinese J Chem 2005 23 404 electrodes J Electrochim Acta 2004 49 4841 and rotating disc electrodes J Electroanal Chem 2005 583 260
1 L- Pb /nanotio 2 89 8 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 2008 69 72 9 Zhang Bao-cheng Electroplating technology M Beijing Beijing University of Aeronautics and Astronautics Press 1993 192-195 10 Zheng Huajun Ma Chunan Wang Wei et al Nanorod tungsten carbide thin film and its electrocatalytic activity for nitromethane electroreduction J Electrochem Commun 2006 8 977 11 Innocenzo G Casella Michela Contursi Electrocatalytic reduction of chlorophenoxy acids at palladium-modified glassy carbon electrodes J Electrochim Acta 2007 52 7028 12 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 2006 22 10 1241 13 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 2003 61 9 1405-1409 14 Allen J Bard Larry R Faulkenr Electrochemical methods fundamentals and applications M Beijing Chemical Industry Press 2005 156-177 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 241000 Anhui China 2 Department of chemistry Vocational and Technical College of Fuyang Fuyang 236000 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