Interaction between residues of different organic compounds on platinum: a mass spectrometric study

Journal of the Brazilian Chemical Society

Castro, Candelaria M.¹  Rodríguez, José L.¹  Universidad de La Laguna, Tenerife, Spain¹  Pastor, Elena¹  González, Sergio¹ 

关键词: organic adlayers;    mass spectrometry;    isotopic labeling;    adsorbate replacement;   

DOI  :  10.1590/S0103-50531997000200004

学科分类：化学（综合）

来源: SciELO

【 摘 要 】

The nature of the catalytic poisons formed during the successive adsorption of different organic compounds obviously depends strongly on the structure of the initial compound1-6, and consequently, the electro-oxidation of these residues occurs in different potential regions, depending on the composition of the adlayer. The aim of the present work is to elucidate the processes taking place when a second compound reacts on a surface already modified by the presence of a first layer of organic residues. With this purpose, three simple molecules were chosen in order to study the interaction between their residues on platinum: formic acid (HCOOH)1,2, ethanol (CH3CH2OH)3, and propargyl alcohol (HC≡CCH2OH)4-6. The above-mentioned compounds form different adsorbates on the Pt surface. Formic acid produces mainly COad1, although COHad species may also be present2. COad oxidation occurs in the double layer region. In the

【 授权许可】

Unknown