title: Photoautotrophic cathodic oxygen reduction catalyzed by a green alga, Chlamydomonas reinhardtii.
abstract: Biofuel cells (BFCs) use enzymes and microbial cells to produce energy from bioavailable substrates and treat various wastewaters, and cathodic oxygen reduction is a key factor governing the efficiency of BFCs. In this study, we demonstrated that a green alga, Chlamydomonas reinhardtii, could directly mediate oxygen reduction. Cyclic voltammogram analysis revealed that the C. reinhardtii biofilm formed on a solid electrode was responsible for oxygen reduction without dosing of electron mediator. Furthermore, 4-electron oxygen reduction pathway was found in this self-sustained, light-responded BFC. The results of this study could expand our understanding and viewpoints of biocathode catalysis, which is essential for novel catalyst design and development for BFCs.
authors.affiliation: Department of Chemistry, University of Science and Technology of China, Hefei 230026, China.
authors.forename: Xian-Wei
authors.initials: XW
authors.lastname: Liu
authors.forename: Xue-Fei
authors.initials: XF
authors.lastname: Sun
authors.forename: Yu-Xi
authors.initials: YX
authors.lastname: Huang
authors.forename: Dao-Bo
authors.initials: DB
authors.lastname: Li
authors.forename: Raymond J
authors.initials: RJ
authors.lastname: Zeng
authors.forename: Lu
authors.initials: L
authors.lastname: Xiong
authors.forename: Guo-Ping
authors.initials: GP
authors.lastname: Sheng
authors.forename: Wen-Wei
authors.initials: WW
authors.lastname: Li
authors.forename: Yuan-Yuan
authors.initials: YY
authors.lastname: Cheng
authors.forename: Shu-Guang
authors.initials: SG
authors.lastname: Wang
authors.forename: Han-Qing
authors.initials: HQ
authors.lastname: Yu
mesh_terms: D052818:Autotrophic Processes / Q000502:physiology*; D001674:Bioelectric Energy Sources; D056804:Biofuels; D019149:Bioreactors; D016825:Chlamydomonas reinhardtii / Q000737:chemistry / Q000378:metabolism* / Q000502:physiology; D004566:Electrodes; D007700:Kinetics; D010084:Oxidation-Reduction; D010100:Oxygen / Q000378:metabolism*
chemical_list: D056804:Biofuels; D010100:Oxygen