Surface-Enhanced Infrared Absorption Spectroscopic Studies of Adsorbed Nitrate, Nitric Oxide, and Related Compounds. 3. Formation and Reduction of Adsorbed Nitrite at a Platinum Electrode
Surface-Enhanced Infrared Absorption Spectroscopic Studies of Adsorbed Nitrate, Nitric Oxide, and Related Compounds. 3. Formation and Reduction of Adsorbed Nitrite at a Platinum Electrode
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DOI：
10.1021/jp911027q
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发表时间：
2010-03
影响因子：
3.7
通讯作者：
Farhana Rahman Rima;K. Nakata;K. Shimazu;M. Osawa
中科院分区：
文献类型：
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作者：
Farhana Rahman Rima;K. Nakata;K. Shimazu;M. Osawa
在0.1 M高氯酸和0.1 M氯酸钠中，用表面增强红外吸收光谱法（SEIRAS）研究了在铂电极上吸附的亚硝酸盐的形成、电位依赖性结构变化和还原。在两种溶液中，亚硝酸盐的硝基形式的对称NO2伸缩带出现在1300 cm−1附近。潜在的光谱依赖性表明，这种吸附的亚硝酸盐被转换为NO吸附在顶部，桥，和缺陷的网站通过IR-非活性表面亚硝酸盐物种。在0.1 M HClO 4中，这三种被吸附的NO物种也在吸附过程中从亚硝酸盐的反硝化形成的溶液NO中形成。除了通过IR-非活性表面亚硝酸盐物种的减少，从吸附的亚硝酸盐到吸附的NO的直接转换也建议在0.1 M的高氯酸。
The formation, potential-dependent structural change, and reduction of adsorbed nitrite at a platinum electrode were examined in 0.1 M HClO4 and 0.1 M NaClO4 by surface-enhanced infrared absorption spectroscopy (SEIRAS). The band assigned to the symmetric NO2 stretch of the nitro form of nitrite appeared at around 1300 cm−1 in both solutions. The potential dependence of the spectra revealed that this adsorbed nitrite is converted to NO adsorbed at on-top, bridge, and defect sites via IR-inactive surface nitrite species. In 0.1 M HClO4, these three adsorbed NO species were also formed during the adsorption process from the solution NO formed by the disproportionation of nitrite. In addition to the reduction via the IR-inactive surface nitrite species, a direct conversion from adsorbed nitrite to adsorbed NO was also suggested in 0.1 M HClO4.