TY - JOUR
T1 - Investigation of the influence for ZnSe phase in Ag2ZnSnSe4 and ZnO/Ag2ZnSnSe4 photoanodes on their photoelectrochemical activities in salt water solution
AU - Su, Yi Chia
AU - Lin, Yan Gu
AU - Cheng, Kong Wei
N1 - Publisher Copyright:
© 2023 Hydrogen Energy Publications LLC
PY - 2023/5/15
Y1 - 2023/5/15
N2 - In this study, quaternary Ag2ZnSnSe4 (AZTSe) photoanodes with low and high ratios of ZnSe phase are made to understand the influence on the charge-transfer mechanisms, reaction kinetics and photoelectrochemical activities in electrolyte. Photoelectrochemical activities of 7.5 and 5.25 mA/cm2 at the given voltage of 1 V (vs. Ag/AgCl) are obtained using the AZTSe sample containing low ratio (atomic percentage of around 21% in sample) and high ratio (atomic percentage of around 37% in sample) of ZnSe phase, respectively. From the electrochemical measurements and X-ray absorption spectra of samples, the ZnSe phase can attract the light-driven electrons from the sample with low ratio of ZnSe phase (atomic percentage of 21% in sample). However, for the sample containing high ratio of ZnSe phase (atomic percentage of 37% in sample), the ZnSe acts as the recombination center and results in poor photoelectrochemical activity. With the modification of ZnO rods on sample, its long-term photoelectrochemical activity is improved due to high charge transportation kinetic and photo-driven holes accumulation on ZnO rods rather than on AZTSe sample. Our study reports a significant observation on the influence of ZnSe phase for photoelectrochemical salt-water splitting.
AB - In this study, quaternary Ag2ZnSnSe4 (AZTSe) photoanodes with low and high ratios of ZnSe phase are made to understand the influence on the charge-transfer mechanisms, reaction kinetics and photoelectrochemical activities in electrolyte. Photoelectrochemical activities of 7.5 and 5.25 mA/cm2 at the given voltage of 1 V (vs. Ag/AgCl) are obtained using the AZTSe sample containing low ratio (atomic percentage of around 21% in sample) and high ratio (atomic percentage of around 37% in sample) of ZnSe phase, respectively. From the electrochemical measurements and X-ray absorption spectra of samples, the ZnSe phase can attract the light-driven electrons from the sample with low ratio of ZnSe phase (atomic percentage of 21% in sample). However, for the sample containing high ratio of ZnSe phase (atomic percentage of 37% in sample), the ZnSe acts as the recombination center and results in poor photoelectrochemical activity. With the modification of ZnO rods on sample, its long-term photoelectrochemical activity is improved due to high charge transportation kinetic and photo-driven holes accumulation on ZnO rods rather than on AZTSe sample. Our study reports a significant observation on the influence of ZnSe phase for photoelectrochemical salt-water splitting.
KW - AgZnSnSe
KW - Electrochmical impedance spectroscopy
KW - Photoelectrochemical activity
KW - Salt-water splitting
UR - http://www.scopus.com/inward/record.url?scp=85148738602&partnerID=8YFLogxK
U2 - 10.1016/j.ijhydene.2023.01.076
DO - 10.1016/j.ijhydene.2023.01.076
M3 - 文章
AN - SCOPUS:85148738602
SN - 0360-3199
VL - 48
SP - 15975
EP - 15991
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
IS - 42
ER -