ELECTROREACTIVITY OF ISOPROPANOL ON PLATINUM IN ACIDS STUDIED BY DEMS AND FTIRS

被引：69

作者：

PASTOR, E ^{[1
]}

GONZALEZ, S ^{[1
]}

ARVIA, AJ ^{[1
]}

机构：

[1] INIFTA,LA PLATA,ARGENTINA

来源：

JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 1995年 / 395卷 / 1-2期

关键词：

IR SPECTROSCOPY; DIFFERENTIAL ELECTROCHEMICAL MASS SPECTROMETRY; ELECTROREACTIVITY; ISOPROPANOL;

D O I：

10.1016/0022-0728(95)04129-C

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The reactivity of isopropanol on polycrystalline Pt in acid solutions was investigated using in-situ Fourier transform IR spectroscopy (FTIRS) and on-line differential electrochemical mass spectrometry (DEMS). The electro-oxidation products are acetone and CO2; the former is observed when isopropanal is present in the bulk of the solution, and the latter is produced from strongly adsorbed species. Bath bulk and adsorbed isopropanol electro-reduction yield propane. H-D exchange is observed during propane formation when the reaction takes place in a D2O + DClO4 solution. This observation suggests the formation of adsorbates bonded to the surface through the C alpha atom of the isopropanol molecule. FTIR spectra of adsorbed species show the presence of -CH3 and -COH groups. The most probable adsorbate structures are (CH3-C-CH3)Pt, (CH3-CH-CH3)Pt and (CH3-COH-CH3)Pt, presumably accompanied by (CH3-COCH3)Pt.

引用

页码：233 / 242

页数：10

共 29 条

[1] EELS IDENTIFICATION OF THE ADSORBED SPECIES FROM ACETONE ADSORPTION ON PT(111) [J].