AMPEROMETRIC CARBON-DIOXIDE GAS SENSOR-BASED ON ELECTRODE REDUCTION OF PLATINUM OXIDE

被引：22

作者：

ISHIJI, T

TAKAHASHI, K

KIRA, A

机构：

[1] RIKEN KEIKI CO LTD,ITABASHI KU,TOKYO 174,JAPAN

[2] INST PHYS & CHEM RES,WAKO,SAITAMA 35101,JAPAN

来源：

ANALYTICAL CHEMISTRY | 1993年 / 65卷 / 20期

关键词：

D O I：

10.1021/ac00068a006

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

An amperometric sensor based on the pH-dependent electrode reduction of platinum oxide was developed for monitoring carbon dioxide in the atmosphere. The sensor, using a gas-permeable Platinum oxide electrode and aqueous electrolytic solution, could measure the CO2 concentration without interference from oxygen reduction. The platinum oxide electrode was formed on a gas-permeable PTFE membrane by reactive sputter coating. It was found that platinum oxide is much better for CO2 sensors than platinum. At the optimum electrode potential, the reduction current was found to be proportional to the square root of the CO2 gas concentration, indicating that the electrode reduction is controlled by the hydrogen ion concentration supplied from CO2. The sensor showed good response and stability.

引用

页码：2736 / 2739

页数：4

共 22 条

[1]

ALBERY WJ, 1982, J ELECTROANAL CHEM, V138, P79

[2] INSTRUMENTATION FOR THE BREATH-BY-BREATH DETERMINATION OF OXYGEN AND CARBON-DIOXIDE BASED ON NONDISPERSIVE ABSORPTION-MEASUREMENTS [J].