POTENTIAL-DEPENDENT COMPETITIVE PROCESSES ON PLATINUM IN ACID-SOLUTION IN THE PRESENCE OF PROPARGYL ALCOHOL

被引：10

作者：

AREVALO, MC ^{[1
]}

PASTOR, E ^{[1
]}

GONZALEZ, S ^{[1
]}

AREVALO, A ^{[1
]}

GIORDANO, MC ^{[1
]}

ARVIA, AJ ^{[1
]}

机构：

[1] NATL UNIV LA PLATA,INIFTA,RA-1900 LA PLATA,ARGENTINA

来源：

JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 1990年 / 281卷 / 1-2期

关键词：

D O I：

10.1016/0022-0728(90)87043-J

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The electroadsorption interactions between dilute propargyl alcohol and smooth platinum in 0.5 M H2SO4 at 25° C have been investigated at different potentials. When the platinum electrode is covered by H atoms the hydrogenation of propargyl alcohol takes place. Otherwise, when the platinum electrode is held at a potential located in the double-layer region, the electroadsorption of propargyl alcohol involves a disruptive electro-oxidation yielding strongly bound adsorbed residues. The latter can be electrodesorbed presumably as carbon dioxide and protons. This process occurs within the O-electroadsorption potential range. The complete residue electrodesorption requires several voltammetric cycles. Competition between the hydrogenation reaction and the disruptive electroadsorption process can be observed at potentials where the platinum surface is partially covered by H atoms. © 1990.

引用

页码：245 / 255

页数：11

共 16 条

[1] LIMITING OXYGEN COVERAGE ON PLATINIZED PLATINUM - RELEVANCE TO DETERMINATION OF REAL PLATINUM AREA BY HYDROGEN ADSORPTION [J].