SURFACE STUDY ON α-Fe2O3 ELECTRODE FOR PHOTODECOMPOSITION OF WATER | Zendy

Zhangda Lin | Zendy; Cheng Yun-Qi | Zendy; WU SHU-YAO | Zendy; WU Xiao-lin | Zendy; QI SHANG-XUE | Zendy; Kai Xie | Zendy

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SURFACE STUDY ON α-Fe2O3 ELECTRODE FOR PHOTODECOMPOSITION OF WATER

Author(s) -

Zhangda Lin,

Cheng Yun-Qi,

WU SHU-YAO,

WU Xiao-lin,

QI SHANG-XUE,

Kai Xie

Publication year - 1983

Publication title -

acta physica sinica

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.199

H-Index - 47

ISSN - 1000-3290

DOI - 10.7498/aps.32.1595

Subject(s) - x ray photoelectron spectroscopy , adsorption , ion , decomposition , materials science , stoichiometry , molecule , catalysis , electrode , analytical chemistry (journal) , chemical engineering , chemistry , environmental chemistry , engineering , biochemistry , organic chemistry

We studied the surface of stoichiometric α-Fe2O3 sample bombarded by Ar+ ion beam, the Fe++ ion was identified on it and the surface was found to become FeO-like in property. In addition, the results of UPS and XPS analysis indicated that OH-existed on the FeO-like surface during water adsorption and the Fe++ was the active center of water decomposition. We propose that water molecules adsorpted onto the surface can preliminarily be seperated into OH- and H+ due to the catalysis of 3d electrons of Fe++ ions on the surface. So, in order to raise the efficiency of photo-decomposition of water, it is not only important to modify the band structure, but also to create Fe++ ions on the α-Fe2O3 surface.

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