Dissociation of formic acid on anatase TiO2(1 0 1) probed by vibrational spectroscopy
Dissociation of formic acid on anatase TiO2(1 0 1) probed by vibrational spectroscopy
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振动光谱探测锐钛矿型 TiO2(1 0 1) 上甲酸的解离
DOI：
10.1016/j.cattod.2011.08.045
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发表时间：
2012
期刊：
影响因子：
5.3
通讯作者：
Yuemin Wang
中科院分区：
文献类型：
--
作者：
Mingchun Xu;H. Noei;Maria Buchholz;M. Muhler;C. Wöll;Yuemin Wang
利用超高真空红外反射吸收光谱(IRRAS)研究了甲酸与锐钛矿型二氧化钛(101)的相互作用。研究发现，HCOOH分子并不像先前提出的那样完整地吸附在二氧化钛(101)上，而是发生解离，形成不同的甲酸盐物种。在IRRAS数据中观察到的IR谱带表明存在单齿和双齿物种。提出了双齿晶型的形成需要氧空位的存在。
The interaction of formic acid with anatase TiO2(101) has been monitored by infrared reflection absorption spectroscopy (IRRAS) using a novel ultrahigh vacuum (UHV) system. It was found that HCOOH molecules do not adsorb intact on TiO2(101), as proposed previously, but dissociate yielding different formate species. The IR-bands observed in the IRRAS-data indicate the presence of a mono- and a bidentate species. It is proposed that the formation of the bidentate form requires the presence of oxygen vacancies.