MECHANISM OF HYDROGEN SENSING BY PD/TIO2 SCHOTTKY DIODES

被引：30
|
作者：
KOBAYASHI, H [1 ]
KISHIMOTO, K [1 ]
NAKATO, Y [1 ]
TSUBOMURA, H [1 ]
机构：
[1] OSAKA UNIV,FAC ENGN SCI,DEPT CHEM,TOYONAKA,OSAKA 560,JAPAN
来源：
SENSORS AND ACTUATORS B-CHEMICAL | 1993年 / 13卷 / 1-3期
关键词：
D O I：
10.1016/0925-4005(93)85341-7
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
The mechanism of hydrogen sensing by Pd/TiO2 Schottky diodes has been investigated by measuring the shift of the current-voltage curve, DELTA(I-V), and the Pd surface work function change, DELTAphi. The kinematic analysis of the plots of DELTA(I-V) versus DELTAphi shows that the formation of adsorbed water from adsorbed oxygen at the Pd/TiO2 interface is the dominant reaction for the Pd/TiO2(001) diodes throughout the hydrogen concentration region investigated (0-3000 ppm), while, for the Pd/TiO2(100) diodes, this reaction is dominant only in the low hydrogen concentration region below 100 ppm and the hydrogen adsorption on bare Pd atoms becomes dominant in the higher hydrogen concentration region.
引用
收藏
页码：125 / 127
页数：3
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