Misra, MridulaPandey, R.N.Srivastava, O.N.2025-04-192025-04-1919973603199https://dl.bhu.ac.in/ir/handle/123456789/100973The present paper describes the fabrication and solar hydrogen production studies employing a new semiconductor-septum (SC-SEP) photoelectrode n-TiO2/Ti based photoelectrochemical solar cell with the configuration SCE/1 M NaOH/TiO2/Ti/H2SO4+K2SO 4/PtCE, PtWE. The monitoring of the current-voltage characteristics of the above SC-SEP cell revealed an enhancement in short-circuit current (ISC) up to three times (5-∼ 15 mAcm-2) that of its single compartment PEC cell counterpart based on the n-TiO2 photoelectrode. The rate of hydrogen production was found to change with variation in the concentration of the electrolyte in the dark compartment; e.g. for 1 M H2SO4 it is 6.31 1 h-1 m-2 and for 5 M it is 13.15 1 h-1 m-2. The optimum hydrogen production rate was found to be 13.15 1 h-1 m-2 for 5 M H2SO4. With a further increase in H2SO4 concentration, the hydrogen production rate was found to be invariant. The hydrogen production rate of TiO2/Ti based SC-SEP cells when compared with the only other known SC-SEP cell based on n-CdSe/Ti and corresponding to the configuration SCE/polysulfide +0.1 M selenium solute/n-CdSe/Ti/5 M H2SO4/PtCE, PtWE exhibits a hydrogen production rate higher by about 10 times. © 1997 International Association for Hydrogen Energy. All rights reserved.Articlehttps://doi.org/10.1016/s0360-3199(96)00130-9