WATER ELECTROLYSIS UNDER MICROGRAVITY CONDITION BY PARABOLIC FLIGHT
WATER ELECTROLYSIS UNDER MICROGRAVITY CONDITION BY PARABOLIC FLIGHT
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DOI：
10.1016/0013-4686(93)80245-u
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发表时间：
1993-04-01
影响因子：
6.6
通讯作者：
KAMIMOTO, M
中科院分区：
文献类型：
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作者：
KANEKO, H;TANAKA, K;KAMIMOTO, M
在微重力和正常重力下都观察到了水电解伴随气体析出的行为。在飞机抛物线飞行的微重力条件下，在金平面电极上以恒定电位进行水电解，时间约为20-25 s。对于每个抛物线，电势保持恒定，相对于Pt线在2.5-15 V的范围内。随着重力的降低，气泡的体积瞬间变大。另一方面，在微重力条件下，经过几秒钟的诱导期后，高电位区（9-15 V vs. Pt）的电流密度急剧下降。然而，降低的电流密度从未达到零，并且显示出一定的最小值。从电流-电位关系可以看出，微重力条件下的水电解过程是由水向电极表面的传质控制的，而正常重力条件下的水电解过程是由电极反应控制的。
Behavior of water electrolysis accompanying gas evolution has been observed both under a microgravity and under a normal gravity. The water electrolysis has been performed at constant potentials on a gold plane electrode during about 20-25 s of the microgravity condition available from parabolic flights of an aircraft. For each parabola the potential has been kept constant in the range of 2.5-15 V vs. Pt wire. The bubble size increased instantly with decreasing gravity. On the other hand, current densities in high potential regions (9-15 V vs. Pt) have drastically decreased under microgravity after an induced period of a few seconds. The reduced current densities, however, have never reached zero and have shown a certain minimum value. From the current-potential relationship, it has been suggested that the process of the water electrolysis under the microgravity condition is controlled by the mass transfer of water to the electrode surface, though the process under the normal gravity condition is controlled by the electrode reaction.