TY - JOUR
T1 - Preparation of a microalgal photoanode for hydrogen production by photo-bioelectrochemical water-splitting
AU - Chen, Zhao'an
AU - Lyu, Yanxia
AU - Wang, Kunyuan
AU - Dong, Xinglong
AU - Deng, Maicun
AU - Bai, Changmin
AU - Xu, Yunpeng
AU - Zhang, Wei
AU - Liu, Zhongmin
PY - 2013/9/30
Y1 - 2013/9/30
N2 - In this study, a microalga Tetraselmis subcordiformis (synonym: Platymonas subcordiformis)-based photoanode was prepared by a novel method developed in our lab. The optimal photocurrent density of microalgae photoanode, 37 μA/cm2, was achieved under illumination of 145 μmol s -1 m-2 at anode potential of 0.5 V vs Ag|AgCl|sat. KCl, immobilized cell density of 2.08 × 106/cm2 and BQ concentration of 300 μmol/L. The results of measurements showed that oxygen evolution peak, hydrogen evolution peak and photocurrent response were all synchronous to light impulse in a three-electrode system. It revealed that there occurred a process of photo-bioelectrochemical water-splitting. Hydrogen can be produced by the method. The investigation for whole photo-bioelectrochemical process also indicated that the electrons for hydrogen evolution had two sources, microalgal metabolic process in dark condition and photosynthetic water oxidation. The photo-hydrogen evolution was twice more than hydrogen evolution in dark condition.
AB - In this study, a microalga Tetraselmis subcordiformis (synonym: Platymonas subcordiformis)-based photoanode was prepared by a novel method developed in our lab. The optimal photocurrent density of microalgae photoanode, 37 μA/cm2, was achieved under illumination of 145 μmol s -1 m-2 at anode potential of 0.5 V vs Ag|AgCl|sat. KCl, immobilized cell density of 2.08 × 106/cm2 and BQ concentration of 300 μmol/L. The results of measurements showed that oxygen evolution peak, hydrogen evolution peak and photocurrent response were all synchronous to light impulse in a three-electrode system. It revealed that there occurred a process of photo-bioelectrochemical water-splitting. Hydrogen can be produced by the method. The investigation for whole photo-bioelectrochemical process also indicated that the electrons for hydrogen evolution had two sources, microalgal metabolic process in dark condition and photosynthetic water oxidation. The photo-hydrogen evolution was twice more than hydrogen evolution in dark condition.
KW - Hydrogen production
KW - Micaoalgal photoanode
KW - Photo-bioelectrochemical water-splitting
KW - Tetraselmis subcordiformis
UR - http://www.scopus.com/inward/record.url?scp=84883774590&partnerID=8YFLogxK
U2 - 10.1016/j.ijhydene.2013.03.095
DO - 10.1016/j.ijhydene.2013.03.095
M3 - Article
SN - 0360-3199
VL - 38
SP - 13045
EP - 13049
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
IS - 29
ER -