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Infrared reflection absorption spectroscopy of sulfuric acid anion adsorbed on stepped surfaces of platinum single-crystal electrodes

被引：42
作者：
Hoshi, N [1 ]
Sakurada, A [1 ]
Nakamura, S [1 ]
Teruya, S [1 ]
Koga, O [1 ]
Hori, Y [1 ]
机构：
[1] Chiba Univ, Fac Engn, Dept Appl Chem, Inage Ku, Chiba 2638522, Japan
来源：
JOURNAL OF PHYSICAL CHEMISTRY B | 2002年 / 106卷 / 08期
关键词：
D O I：
10.1021/jp012456o
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Adsorption of sulfuric acid anion (HSO4- or SO42-) was studied using IRAS (infrared reflection absorption spectroscopy) on Pt(S)-[n(111) x (111)] and Pt(S)-[n(100) x (111)] electrodes in 0.05 M H2SO4. Pt(S)-[n(I 11) x (I 11)] electrodes give two IRAS bands. One is from a sulfuric acid anion adsorbed on the terrace with 3-fold symmetry (similar to1200 cm(-1)), and another is from that on the step with 2-fold symmetry (similar to1200 cm(-1) and similar to 1100 cm(-1)). Relative band intensity from the 2-fold sulfuric acid anion (similar to 1100 cm(-1)) gets higher with the increase of step atom density. Pt(S)-[n(100) x (111)] electrodes also show two IRAS bands around 1200 and 1100 cm(-1) which originate from the sulfuric acid anion adsorbed on the terrace and the step with 2-fold symmetry. The relative intensity of the lower frequency band increased with the increase of the step atom density.
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页码：1985 / 1990
页数：6
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