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

Zhao'an Chen, Yanxia Lyu, Kunyuan Wang, Xinglong Dong, Maicun Deng, Changmin Bai, Yunpeng Xu, Wei Zhang, Zhongmin Liu

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    6 Citations (Scopus)

    Abstract

    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.

    Original languageEnglish
    Pages (from-to)13045-13049
    Number of pages5
    JournalInternational Journal of Hydrogen Energy
    Volume38
    Issue number29
    DOIs
    Publication statusPublished - 30 Sep 2013

    Keywords

    • Hydrogen production
    • Micaoalgal photoanode
    • Photo-bioelectrochemical water-splitting
    • Tetraselmis subcordiformis

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