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题名: An alternative approach to ascertain the rate-determining steps of TiO2 photoelectrocatalytic reaction by electrochemical impedance spectroscopy
作者: Liu, H;  Li, XZ;  Leng, YJ;  Li, WZ
刊名: JOURNAL OF PHYSICAL CHEMISTRY B
发表日期: 2003-08-28
DOI: 10.1021/jp034113r
卷: 107, 期:34, 页:8988-8996
收录类别: SCI
文章类型: Article
部门归属: 801
项目归属: 801
产权排名: 3;1
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Physical
研究领域[WOS]: Chemistry
英文摘要: In an attempt to ascertain the rate-determining steps (RDS) of TiO2 photoelectrocatalytic (PEC) reaction, the PEC oxidation of sulfosalicylic acid (SSA) solution in a TiO2-coated electrode reactor system was monitored by applying the electrochemical impedance spectroscopy (EIS) method. In the meantime, an EIS mathematical model was first established to theoretically simulate the PEC reaction. Based on the EIS model, the theoretical simulation indicates three typical reactions in a PEC oxidation process, which include the charge-transfer-dominated reaction, both the charge-transfer- and adsorption-dominated reaction, and the adsorption-dominated reaction. The experimental results of EIS measurement showed that there was only one arc/semicircle on the EIS plane display when the external bias applied was below 200 mV (vs SCE) in the SSA PEC degradation whereas there were two arcs/semicircles when the externally applied bias exceeded 200 mV (vs SCE). The experimental results have a good agreement with the model simulation. The EIS method in this study provides an easier way to determine the RDS in a PEC oxidation process, which would be helpful to better control the reaction in practice.
关键词[WOS]: INTENSITY-MODULATED PHOTOCURRENT ;  PHOTOCATALYTIC DEGRADATION ;  FILM ELECTRODES ;  SULFOSALICYLIC ACID ;  TITANIUM-DIOXIDE ;  AQUEOUS-SOLUTION ;  ADSORPTION ;  PHOTOOXIDATION ;  OXIDATION ;  KINETICS
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000184968000039
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/83009
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Hong Kong Polytech Univ, Dept Civil & Struct Engn, Kowloon, Hong Kong, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
3.Nanyang Technol Univ, Sch Mech & Prod Engn, Singapore 639798, Singapore

Recommended Citation:
Liu, H,Li, XZ,Leng, YJ,et al. An alternative approach to ascertain the rate-determining steps of TiO2 photoelectrocatalytic reaction by electrochemical impedance spectroscopy[J]. JOURNAL OF PHYSICAL CHEMISTRY B,2003,107(34):8988-8996.
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