Research Project
Grant-in-Aid for Challenging Exploratory Research
Platinum nanoparticles were successfully synthesized by biomineralization using the metal ion-reducing bacterium Shewanella algae. Resting cells of S. algae were able to reduced soluble platinum(IV) to insoluble platinum(0) at room temperature and neutral pH within 90 min when formate was provided as the electron donor. Biogenic platinum nanoparticles of 2-4 nm in size were deposited in the bacterial periplasm.The biogenic platinum(0) nanoparticles were released from bacterial cells into aqueous solution by ultrasonic treatment of bacterial suspension with addition of sodium hydroxide. The carbon-supported biogenic platinum(0) nanoparticles were tested as an anode catalyst in a fuel cell for power production. The maximum power generation of the biogenic platinum(0)/carbon catalyst was 1.7 times higher than that of a commercial platinum(0)/carbon catalyst for chemical synthesis.
All 2016 2015 Other
All Presentation (4 results) (of which Int'l Joint Research: 1 results, Invited: 1 results) Remarks (1 results)
