Due to movement of {TAIL ~ electrons}, water in contact with {HEAD ~ the semiconductor electrode} is decomposed, so that oxygen is produced 
Due to movement of { TAIL ~ electrons } , water in contact with { HEAD ~ the semiconductor electrode } is decomposed , so that oxygen is produced
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH