The photoelectrochemistry of platinum phthalocyanine films in aqueous media

被引:5
作者
Brown, RJC
Kucernak, AR
机构
[1] Univ London Imperial Coll Sci Technol & Med, Dept Chem, London SW7 2AY, England
[2] Natl Phys Lab, Analyt Sci Grp, Teddington TW11 0LW, Middx, England
关键词
photoelectrochemistry; voltammetry of microparticles; platinum phthalocyanine;
D O I
10.1007/s10008-004-0583-0
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
Platinum phthalocyanine (PtPc) films applied to glassy carbon (GC) and platinum surfaces have been shown to exhibit complex photoelectrochemistry in aqueous media, acting as an n-type semi-conducting material. Using chopped polychromatic radiation and a lock-in amplifier to detect the modulated photocurrent, photo-responses were measured for PtPc films on GC in a variety of background electrolytes. In all instances the photo-responses were anodic over the voltage ranges used. Two peaks were seen in each sweep direction for the experiments performed in sulfuric acid and sodium hydroxide solutions. The origin of the photocurrent has been ascribed to the photo-oxidation of water in the electrolyte by positive holes produced under illumination, which accumulate at the PtPc/electrolyte interface. Photocurrent transients were also recorded and indicated some recombination of excitons within the system.
引用
收藏
页码:459 / 468
页数:10
相关论文
共 32 条
[1]   Photo-electrochemical behaviour of glassy carbon [J].
Antoine, O ;
Augustynski, J .
ELECTROCHEMISTRY COMMUNICATIONS, 2001, 3 (04) :195-198
[2]   PHOTOCURRENT KINETICS IN METAL PHTHALOCYANINE CRYSTALS, FILMS AND PELLETS [J].
BAHRA, GS ;
CHADWICK, AV ;
COUVES, JW ;
WRIGHT, JD .
JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS I, 1989, 85 :1979-1989
[3]   COMPARISON OF LINEAR SCAN AND STAIRCASE VOLTAMMETRY - EXPERIMENTAL RESULTS [J].
BILEWICZ, R ;
OSTERYOUNG, RA ;
OSTERYOUNG, J .
ANALYTICAL CHEMISTRY, 1986, 58 (13) :2761-2765
[4]   Spectroscopic and electrochemical studies on platinum and palladium phthalocyanines [J].
Brown, RJC ;
Kucernak, AR ;
Long, NJ ;
Mongay-Batalla, C .
NEW JOURNAL OF CHEMISTRY, 2004, 28 (06) :676-680
[5]   The electrochemistry of platinum phthalocyanine microcrystals III. Electrochemical behaviour in aqueous electrolytes [J].
Brown, RJC ;
Kucernak, AR .
ELECTROCHIMICA ACTA, 2001, 46 (16) :2573-2582
[6]  
BROWN RJC, 2000, THESIS DEP CHEM IMP
[7]   EVIDENCE FOR CHARGE TRAPPING AT THE GOLD CHLOROGALLIUM PHTHALOCYANINE INTERFACE USING PHOTOCURRENT SPECTROSCOPY WITH ONE OR 2 ILLUMINATION SOURCES [J].
BUTTNER, WJ ;
RIEKE, PC ;
ARMSTRONG, NR .
JOURNAL OF PHYSICAL CHEMISTRY, 1985, 89 (07) :1116-1121
[8]   Percolation threshold potentials at quasi-static electrochemical switching of polyaniline films [J].
Cao, J ;
Aoki, K .
ELECTROCHIMICA ACTA, 1996, 41 (11-12) :1787-1792
[9]   VISIBLE ABSORPTION AND PHOTOCURRENT SPECTRA OF EPITAXIALLY DEPOSITED PHTHALOCYANINE THIN-FILMS - INTERPRETATION OF EXCITON COUPLING EFFECTS [J].
CHAU, LK ;
ENGLAND, CD ;
CHEN, SY ;
ARMSTRONG, NR .
JOURNAL OF PHYSICAL CHEMISTRY, 1993, 97 (11) :2699-2706
[10]   PHOTOCURRENT KINETICS OF GROUP-III METAL (PHTHALOCYANINATO) HALOGEN COMPLEXES IN VACUUM AND OXIDIZING GAS ATMOSPHERES [J].
COUVES, JW ;
TAMIZI, M ;
WRIGHT, JD .
JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS, 1990, 86 (01) :115-121