A HREELS study of the adsorption of formic acid on slightly oxidized Nb(110) surface

An investigation has been made on the adsorption and decomposition of formic acid on slightly oxidized Nb(110) surface (0/Nb atom ratio = 0.2) using high resolution electron energy loss spectroscopy (HREELS),and a corresponding surface reaction mode is given.At 140 K,formic acid of low exposure on s...

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Published inScience China. Chemistry Vol. 40; no. 1; pp. 9 - 14
Main Author 汪寅生 魏绪明 田志坚 翟润生 T.Ushikubo K.Sato 庄叔贤
Format Journal Article
LanguageEnglish
Published Heidelberg Springer Nature B.V 01.02.1997
Subjects
acid
Acids
Adsorption
Configurations
Decomposition
Electron energy loss spectroscopy
Exposure
formic
Formic acid
HREELS
Multilayers
Nb{110}
Oxidation
surface
Surface chemistry
Surface reactions
Temperature
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ISSN1674-7291
1006-9291
1869-1870
1862-2771
DOI10.1007/BF02882182

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Summary:An investigation has been made on the adsorption and decomposition of formic acid on slightly oxidized Nb(110) surface (0/Nb atom ratio = 0.2) using high resolution electron energy loss spectroscopy (HREELS),and a corresponding surface reaction mode is given.At 140 K,formic acid of low exposure on such an Nb(110) surface decomposed to formate,which bonded on Nb in monodentate configuration,simultaneously some formate decomposed to CO,which adsorbed on the surface.Formic acid multilayers formed when the exposure was high.While the temperature was increased to above 190 K,multilayer formic acid desorbed,and the surface was covered with mon-odentate-bonded formate and CO.In the temperature range of 250-300 K,chemisorbed formate changed from monodentate configuration into bridging configuration and CO molecules disappeared.The decomposition of formate at higher temperatures led to the oxidation of Nb.The formate formed in the high exposure case was so stable that it did not decompose even the temperature wa
Bibliography:WANG Yinsheng,WEI Xuming,TIAN ZhijianZHAI Runsheng(State Key Laboratory of Catalysis,Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023,China)T.Ushikubo,K.Sato(Mitsubishi Chemrcal Corporation,Japan)and ZHUANG Shuxian(Department of Chemical Physics,University of Science and Technology of China,Hefei 230026,China)
11-5839/O6
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ISSN:1674-7291
1006-9291
1869-1870
1862-2771
DOI:10.1007/BF02882182