Preparation of a microalgal photoanode for hydrogen production by photo-bioelectrochemical water-splitting

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• 作者：Zhaoan Chen ; Yanxia Lyu ; Kunyuan Wang ; Xinglong Dong ; Maicun Deng ; Changmin Bai ; Yunpeng Xu ; Wei Zhang ; Zhongmin Liu
• 关键词：Micaoalgal photoanode ; Hydrogen production ; Photo-bioelectrochemical water-splitting ; Tetraselmis subcordiformis
• 刊名：International Journal of Hydrogen Energy
• 出版年：2013
• 出版时间：30 September, 2013
• 年：2013
• 卷：38
• 期：29
• 页码：13045-13049
• 全文大小：627 K

文摘

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?¦ÌA/cm², was achieved under illumination of 145?¦Ìmol?s^?1?m^?2 at anode potential of 0.5?V vs Ag|AgCl|sat. KCl, immobilized cell density of 2.08?¡Á?10⁶/cm² and BQ concentration of 300?¦Ìmol/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.