OSCILLATING HYDROGEN-WATER REACTIONS ON A PLATINUM FIELD EMITTER

被引:28
作者
ERNST, N
BOZDECH, G
GORODETSKII, V
KREUZER, HJ
WANG, RLC
BLOCK, JH
机构
[1] BORESKOV INST CATLAYSIS, NOVOSIBIRSK, RUSSIA
[2] DALHOUSIE UNIV, DEPT PHYS, HALIFAX B3H 3J5, NS, CANADA
关键词
D O I
10.1016/0039-6028(94)90094-9
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The spatial and temporal behavior of surface reaction-diffusion-fronts has been examined during oscillating H2/H2O reactions on a Pt field ion emitter. Mass and energy resolved measurements, discriminating between different reaction pathways, have been made of local yields of ions such as H3O+ and H3O+.H2O. Periodic out-bursts of ion yields correlate with the passage of wave fronts across the emitter apex imaged by field ion microscopy. The experimental observations together with the predictions of a kinetic lattice gas model suggest that the supply of hydrogen, primarily by surface diffusion from the emitter shank plays a vital role.
引用
收藏
页码:L1211 / L1218
页数:8
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