Fig. 2
From: Efficient solar hydrogen generation in microgravity environment
Results of the photoelectrochemical experiments in microgravity environment. a J–V measurements of thin-film and nanostructured p-InP–Rh photoelectrodes in terrestrial (1g) and microgravity environments (10−6g) at 70 mW/cm2 illumination with a W-I lamp in 1 M HClO4 with the addition of 1% (v/v) isopropanol. Differences in the VOC of the nanostructured and thin-film sample in terrestrial conditions are subject to performance differences of the photoelectrodes as shown in Supplementary Table 2. b Images from video recordings of the thin-film and nanostructured photoelectrodes after 9.3 s in terrestrial and microgravity conditions. In microgravity environment, hydrogen gas bubbles form a froth layer on the thin-film electrodes whereas the bubble adhesion to the electrode surface is decreased in the presence of the nanostructured Rh layer
