Photoelectrochemical and Spectroelectrochemical Studies onIron Oxide Ultrafine Particles

Authors

Maizhi Yang, Dept. of Chem. Bdijing University, Beijing 100871)Lu Xiaojiang(Dept. of Chem. Mudanjiang Teacher's College., Mudajang 157000)Tian Zhongqun; Luo Jin(Dept. of Chem. Xiamen univ. Xiamen 361005;
Yongjun Ji, Dept. of Chem. Bdijing University, Beijing 100871)Lu Xiaojiang(Dept. of Chem. Mudanjiang Teacher's College., Mudajang 157000)Tian Zhongqun; Luo Jin(Dept. of Chem. Xiamen univ. Xiamen 361005;
Wen Zhang, Dept. of Chem. Bdijing University, Beijing 100871)Lu Xiaojiang(Dept. of Chem. Mudanjiang Teacher's College., Mudajang 157000)Tian Zhongqun; Luo Jin(Dept. of Chem. Xiamen univ. Xiamen 361005;
Shengmin Cai, Dept. of Chem. Bdijing University, Beijing 100871)Lu Xiaojiang(Dept. of Chem. Mudanjiang Teacher's College., Mudajang 157000)Tian Zhongqun; Luo Jin(Dept. of Chem. Xiamen univ. Xiamen 361005;

Abstract

in this paper, Raman spectra, photocurrent and the UV-VIS reflectance aremeasured for studying the α-Fe_2O_3ultrafine particles adsorbed on Pt electrode. The blue shifts ofRaman peaks demonstrate the size quantization effect for the particles of 50 nm in diameter ascompared with the bulk material. With the changing of the potential , the photocurrent decrcases as theUV-VIS reflectance increases, and vice-versa. Therefore, the potential not only affects the hargetransfer direcdtion in the interface of electrede/redox couple, but also influences the light absortion onthe surface of particles.According to the results of photoelectrochemistry, we suggest that the cathedicphotocurrent in the potential range of more than negative 270 mV arises from a reduction process ofthe photo-induced oxidation product on the platinum substrate electrixle and the anodic one in the rangeof more than positive 270 mV, and arises from a directly photo-induced oxidation process on thesurface of partiles.

Keywords

Ultrafine particle, lron oxide, Photocurrent, Raman spectre, UV-VISreflectance

DOI Link

https://doi.org/10.61558/2993-074X.1275

Publication Date

1995-05-28

Online Available Date

1995-05-28

Revised Date

1995-05-28

Received Date

1995-05-28

Recommended Citation

Maizhi Yang, Yongjun Ji, Wen Zhang, Shengmin Cai. Photoelectrochemical and Spectroelectrochemical Studies onIron Oxide Ultrafine Particles[J]. Journal of Electrochemistry, 1995 , 1(2): 146-151.
DOI: 10.61558/2993-074X.1275
Available at: https://jelectrochem.xmu.edu.cn/journal/vol1/iss2/3

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