Photo-assisted chargeability of TiO_2-Pt/Mm(Ni_(3.4)Mn_(0.4)Al_(0.3)Co_(0.7))electrode
A photo-chargeable TiO2-Pt/Mm(Ni3.4Mn0.4Al0.3Co0.7)electrode(TPM electrodes)was prepared by using a hydrogen storage alloy[Mm(Ni3.4Mn0.4Al0.3Co0.7)]sheet modified with TiO2-Pt nanoparticles prepared by the photo-assisted deposition method.The photo-electrochemical properties and the photo-chargeability of TPM electrode were investigated.The results showed that the TPM could be charged by light with the aid of electric current.But the discharge content of the TPM electrode illuminated only was very small in contrast with the electrode charged by light and electric current.The mechanism was explained by the results of the cyclic voltammogram and electrochemical impedance spectrum of the TPM electrode with or without illumination.