Pt-Ag Catalysts as Cathode Material for Oxygen-Depolarized Electrodes in Hydrochloric Acid Electrolysis

被引：32

作者：

Maljusch, Artjom ^{[1
]}

Nagaiah, Tharamani Chikka ^{[1
]}

Schwamborn, Stefanie ^{[1
]}

Bron, Michael ^{[1
]}

Schuhmann, Wolfgang ^{[1
]}

机构：

[1] Ruhr Univ Bochum, D-44780 Bochum, Germany

来源：

ANALYTICAL CHEMISTRY | 2010年 / 82卷 / 05期

关键词：

SCANNING ELECTROCHEMICAL MICROSCOPY; ELECTROCATALYTIC ACTIVITY; REDUCTION; VISUALIZATION; PD; NANOPARTICLES; MODE; SECM;

D O I：

10.1021/ac902620g

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Pt-Ag nanoparticles were prepared on a glassy carbon (GC) surface by pulsed electrodeposition and tested using cyclic voltammetry and scanning electrochemical microscopy (SECM) with respect to their possible use as catalyst material for oxygen reduction in 400 mM HCl solution. For comparison, a Pt catalyst was investigated under similar conditions. The redox competition mode of scanning electrochemical microscopy (RC-SECM) was adapted to the specific conditions caused by the presence of Cl- ions and used to visualize the local catalytic activity of the Pt-Ag deposits. Similarly prepared Pt deposits were shown to dissolve underneath the SECM tip. Pt-Ag composites showed improved long-term stability toward oxygen reduction its compared with Pit even under multiple switching off to open-circuit potential in 400 mM HCl.

引用

页码：1890 / 1896

页数：7

共 26 条

[21] Visualization of the Local Catalytic Activity of Electrodeposited Pt-Ag Catalysts for Oxygen Reduction by means of SECM [J].